The invention is directed to a process to continuously treat a hydrogen sulphide comprising gas, said process comprising the following steps:
(a) contacting the hydrogen sulphide comprising gas with an aqueous alkaline liquid comprising sulphide-oxidising bacteria and elemental sulphur particles thereby producing a loaded aqueous liquid comprising dissolved sulphide, polysulphide compounds, sulphide-oxidising bacteria and elemental sulphur particles and a gas having a lower content of hydrogen sulphide, and passing the loaded aqueous liquid through a polysulphide reactor zone comprising one or more plug flow reactor zones,
(b) contacting the loaded aqueous liquid with an oxidant to enable the sulphide-oxidising bacteria to oxidise sulphide to elemental sulphur, thereby producing an enriched aqueous liquid comprising an increased amount of elemental sulphur particles and
(c) separating elemental sulphur particles from the enriched aqueous liquid, wherein the residence time of the loaded aqueous liquid between its preparation in step (a) and its supply to step (b) is between 3 and 45 minutes, and wherein the content of elemental sulphur as part of the polysulphide compounds in the loaded aqueous liquid [S0 in Sx2−] as supplied to step (b) is above 0.7 mM.
B01D 53/14 - Separation of gases or vapoursRecovering vapours of volatile solvents from gasesChemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases or aerosols by absorption
The invention relates to a process of microbiologically treating an aqueous liquid comprising biodegradable substrate in an installation comprising (i) a bioreactor containing a biomass sludge and (ii) a biomass separator that is separated from the bioreactor and that comprises one or more inclined plate settlers, wherein the biomass separator has a footprint area A of 0.5 to 30 m2nnii =1psaii ii representing the aggregate projected surface area of inclined plate element i in m2; and wherein PSAR ≥ 2.8+ 0.17A. The installation that is used to operate the process of the present invention can achieve solid-liquid separation in the biomass separator at a very high fluid flow velocity, without compromising on separation efficiency and without substantially increasing the total footprint of the installation. The invention also provides an installation for microbiologically treating an aqueous liquid comprising a biodegradable substrate.
B01D 21/00 - Separation of suspended solid particles from liquids by sedimentation
C02F 103/28 - Nature of the water, waste water, sewage or sludge to be treated from the processing of plants or parts thereof from the paper or cellulose industry
C02F 103/32 - Nature of the water, waste water, sewage or sludge to be treated from the food or foodstuff industry, e.g. brewery waste waters
C02F 3/00 - Biological treatment of water, waste water, or sewage
37 - Construction and mining; installation and repair services
40 - Treatment of materials; recycling, air and water treatment,
Goods & Services
Installations for the treatment of gases; installations for
the desulfurization of gases; installations for the
purification of gases; installations for the purification of
waste gases; installations for the purification of biogases;
installations for the purification of (waste) water. Building construction; repair of gas purification
installations; repair of water purification installations;
installation of gas purification installations; installation
of water purification installations. Treatment of natural gases; treatment of hazardous gases;
treatment of waste gases; biological desulfurization;
purification of gases; purification of waste gases;
purification of biogases; information, advice and
consultancy services relating to the treatment and
purification of gases; water treatment and purification.
37 - Construction and mining; installation and repair services
42 - Scientific, technological and industrial services, research and design
Goods & Services
Installations for the purification of (waste)water and
gases; installations for the anaerobic and aerobic treatment
(purification or fermentation) of (waste)water and/or silt. Building construction; repair of gas purification
installations; repair of water purification installations;
installation of gas purification installations; installation
of water purification installations. Scientific and technological services and research and
design relating thereto; chemical analysis; chemical,
bacteriological and microbiological research services;
technical advice relating to (waste)water and gas and
recycling of waste.
37 - Construction and mining; installation and repair services
40 - Treatment of materials; recycling, air and water treatment,
Goods & Services
(1) Installations for the treatment of gases; installations for the desulfurization of gases; installations for the purification of gases; installations for the purification of waste gases; installations for the purification of biogases; installations for the purification of (waste) water. (1) Building construction; repair of gas purification installations; repair of water purification installations; installation of gas purification installations; installation of water purification installations.
(2) Treatment of natural gases; treatment of hazardous gases; treatment of waste gases; biological desulfurization; purification of gases; purification of waste gases; purification of biogases; information, advice and consultancy services relating to the treatment and purification of gases; water treatment and purification.
6.
A PROCESS TO CONTINUOUSLY TREAT A HYDROGEN SULPHIDE COMPRISING GAS AND SULPHUR RECLAIMING FACILITIES
The invention is directed to a process to continuously treat a hydrogen sulphide comprising gas, said process comprising the following steps: (a) contacting the hydrogen sulphide comprising gas with an aqueous alkaline liquid comprising sulphide-oxidising bacteria and elemental sulphur particles thereby producing a loaded aqueous liquid comprising dissolved sulphide, polysulphide compounds, sulphide-oxidising bacteria and elemental sulphur particles and a gas having a lower content of hydrogen sulphide, and passing the loaded aqueous liquid through a polysulphide reactor zone comprising one or more plug flow reactor zones, (b) contacting the loaded aqueous liquid with an oxidant to enable the sulphide- oxidising bacteria to oxidise sulphide to elemental sulphur, thereby producing an enriched aqueous liquid comprising an increased amount of elemental sulphur particles and (c) separating elemental sulphur particles from the enriched aqueous liquid, wherein the residence time of the loaded aqueous liquid between its preparation in step (a) and its supply to step (b) is between 3 and 45 minutes, and wherein the content of elemental sulphur as part of the polysulphide compounds in the loaded aqueous liquid [s° in Sx2"j as supplied to step (b) is above 0.7 mM.
C12P 1/04 - Preparation of compounds or compositions, not provided for in groups , by using microorganisms or enzymesGeneral processes for the preparation of compounds or compositions by using microorganisms or enzymes by using bacteria
B01J 8/00 - Chemical or physical processes in general, conducted in the presence of fluids and solid particlesApparatus for such processes
B01J 19/24 - Stationary reactors without moving elements inside
C12M 1/12 - Apparatus for enzymology or microbiology with sterilisation, filtration, or dialysis means
40 - Treatment of materials; recycling, air and water treatment,
11 - Environmental control apparatus
37 - Construction and mining; installation and repair services
Goods & Services
Treatment of natural gases; treatment of hazardous gases; treatment of waste gases; biological desulfurization services, namely, biological desulfurization of gases; purification of gases; purification of waste gases; purification of biogases; information, advice and consultancy services relating to the treatment and purification of gases; water treatment and purification Installations for the treatment of gases; installations for the desulfurization of gases; installations for the purification of gases; installations for the purification of waste gases; installations for the purification of biogases; installations for the purification of waste water Building construction; Repair services, namely, repair services of gas treatment installations; installation services, namely, installation services of gas treatment installations; Installation services of gas purification installations; Installation services of water purification installations
40 - Treatment of materials; recycling, air and water treatment,
11 - Environmental control apparatus
37 - Construction and mining; installation and repair services
42 - Scientific, technological and industrial services, research and design
Goods & Services
Technical advice relating to treatment and purification of water, waste water, and gas and recycling of waste Installations for the purification of water, waste water and gases; installations for the anaerobic and aerobic treatment, purification or fermentation of water, waste water and silt, all for industrial purposes Building construction; Repair services, namely, repair of water and waste water purification apparatus and repair of apparatus for purifying gases; Installation services of apparatus used in the purification of water, waste water and gases; installation services of gas and water purification installations Scientific and technological services, namely, scientific research, analysis, and testing in the field of purification of water, waste water and gases; scientific design and research services in the field of purification of water, waste water and gases; chemical analysis; chemical, bacteriological and microbiological research services
37 - Construction and mining; installation and repair services
40 - Treatment of materials; recycling, air and water treatment,
Goods & Services
Installations for the treatment of gases; installations for the desulfurization of gases; installations for the purification of gases; installations for the purification of waste gases; installations for the purification of biogases; installations for the purification of (waste) water. Building construction; repair of gas purification installations; repair of water purification installations; installation of gas purification installations; installation of water purification installations. Treatment of natural gases; treatment of hazardous gases; treatment of waste gases; biological desulfurization; purification of gases; purification of waste gases; purification of biogases; information, advice and consultancy services relating to the treatment and purification of gases; water treatment and purification.
11.
Spiral-shaped separation device for fluid purification device
A separation device for a fluid purification device is provided, the separation device comprising: at least three concentric enclosures including an outermost enclosure and an innermost enclosure and defining at least two concentric cavities; a plurality of spiral-shaped channels formed in each of the at least two concentric cavities, so that fluid can flow through said plurality of spiral-shaped channels; a fluid inlet, for receiving fluid, located in an upper section of an outermost cavity among the at least two concentric cavities, the fluid inlet corresponding to a gas outlet; a solids outlet, for discharging solids comprised in the fluid, located in a lower section of the separation device; and a liquid outlet, for discharging liquid comprised in the fluid, located in an upper section of at least one inner cavity among the at least two concentric cavities.
An anaerobic purification apparatus of a fluid such as wastewater, the apparatus comprising: a reaction tank and a biomass recirculation unit for an anaerobic purification apparatus of fluid. The biomass recirculation unit comprises: an inlet system configured to receive influent fluid from outside, a biomass collecting system for drawing off biomass from a middle section in the reactor tank and bringing the biomass into the biomass recirculation unit, a mixing segment for being connected to the inlet system and the biomass collecting system, and for receiving and mixing the influent fluid and the biomass, and an outlet system for discharging a mixture of the influent fluid and the biomass into the lower section of the reactor tank, the inlet system comprising a constricted nozzle for, as the influent fluid flows from the inlet system to the mixing segment through the constricted nozzle, creating a suction effect causing the biomass collecting system to draw off the biomass from the middle section of the reactor tank into the mixing segment.
B01F 25/50 - Circulation mixers, e.g. wherein at least part of the mixture is discharged from and reintroduced into a receptacle
B01F 25/21 - Jet mixers, i.e. mixers using high-speed fluid streams with submerged injectors, e.g. nozzles, for injecting high-pressure jets into a large volume or into mixing chambers
40 - Treatment of materials; recycling, air and water treatment,
42 - Scientific, technological and industrial services, research and design
Goods & Services
Waste water purification installations. Waste water treatment; recycling of garbage and waste; Information, advice and consultancy services relating to the recycling of waste water and trash; Destruction of waste and trash. Chemical analysis; Research in the field of chemistry; Research in the field of bacteriology; Research in the field of microbiology.
The present invention relates to a process for the separation of biomass in the anaerobic purification of wastewater and to a system for the separation of biomass in the anaerobic purification of wastewater.
The present invention relates to a process for the controlling the sodium and sulfur levels in a pulp mill, comprising the steps of:
a) providing a pulp mill stream comprising sulfide and having a total alkali concentration of at least 2 Molar;
b) supplying a portion of the pulp mill stream to a reactor comprising sulfide oxidizing bacteria and removing sulfide from the pulp mill stream by subjecting said stream to sulfide oxidizing bacteria in the presence of oxygen, and at a pH in the range 8 to 11, to oxidize the sulfide to elemental sulfur,
c) withdrawing from the reactor a treated pulp mill stream comprising sulfur,
wherein the portion of the pulp mill stream is mixed with a portion of the sulfide oxidizing bacteria present in the reactor prior to supplying the pulp mill stream to the reactor in step b).
A separation device for a fluid purification device is provided, the separation device comprising: at least three concentric enclosures including an outermost enclosure and an innermost enclosure and defining at least two concentric cavities; a plurality of spiral-shaped channels formed in each of the at least two concentric cavities, so that fluid can flow through said plurality of spiral-shaped channels; a fluid inlet, for receiving fluid, located in an upper section of an outermost cavity among the at least two concentric cavities, the fluid inlet corresponding to a gas outlet; a solids outlet, for discharging solids comprised in the fluid, located in a lower section of the separation device; and a liquid outlet, for discharging liquid comprised in the fluid, located in an upper section of at least one inner cavity among the at least two concentric cavities.
B01D 45/06 - Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by utilising inertia by reversal of direction of flow
B01D 45/10 - Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by utilising inertia by impingement against baffle separators which are wetted
B01D 21/00 - Separation of suspended solid particles from liquids by sedimentation
The present invention relates to a process for the separation of biomass in the anaerobic purification of wastewater and to a system for the separation of biomass in the anaerobic purification of wastewater.
The present invention relates to a process for the separation of biomass in the anaerobic purification of wastewater and to a system for the separation of biomass in the anaerobic purification of wastewater.
The present invention relates to a process for the treatment of industrial alkaline streams comprising sulfide and carbonate, comprising the steps of: a) providing an industrial alkaline stream comprising sulfide and carbonate; b) supplying the industrial alkaline stream to a bioreactor comprising sulfide oxidizing bacteria and removing sulfide from the industrial alkaline stream by subjecting said stream to sulfide oxidizing bacteria in the presence of oxygen, and supplying a pH adjustment agent to the bioreactor to maintain a pH in the range in the range 8 to 11, to oxidize the sulfide to elemental sulfur, c) withdrawing from the bioreactor a treated industrial alkaline stream comprising elemental sulfur, wherein a portion of the sulfide oxidizing bacteria is removed from the bioreactor and mixed with the industrial alkaline stream prior to supplying the industrial alkaline stream to the bioreactor in step b).
C02F 3/34 - Biological treatment of water, waste water, or sewage characterised by the microorganisms used
C02F 1/66 - Treatment of water, waste water, or sewage by neutralisationTreatment of water, waste water, or sewage pH adjustment
C02F 103/36 - Nature of the water, waste water, sewage or sludge to be treated from the chemical industry not provided for in groups from the manufacture of organic compounds
C02F 103/28 - Nature of the water, waste water, sewage or sludge to be treated from the processing of plants or parts thereof from the paper or cellulose industry
The present invention relates to a process for the treatment of industrial alkaline streams comprising sulfide and carbonate, comprising the steps of: a) providing an industrial alkaline stream comprising sulfide and carbonate; b) supplying the industrial alkaline stream to a bioreactor comprising sulfide oxidizing bacteria and removing sulfide from the industrial alkaline stream by subjecting said stream to sulfide oxidizing bacteria in the presence of oxygen, and supplying a pH adjustment agent to the bioreactor to maintain a pH in the range in the range 8 to 11, to oxidize the sulfide to elemental sulfur, c) withdrawing from the bioreactor a treated industrial alkaline stream comprising elemental sulfur, wherein a portion of the sulfide oxidizing bacteria is removed from the bioreactor and mixed with the industrial alkaline stream prior to supplying the industrial alkaline stream to the bioreactor in step b).
The present invention relates to a process for the controlling the sodium and sulfur levels in a pulp mill, comprising the steps of: a) providing a pulp mill stream comprising sulfide and having a total alkali concentration of at least 2 Molar; b) supplying a portion of the pulp mill stream to a reactor comprising sulfide oxidizing bacteria and removing sulfide from the pulp mill stream by subjecting said stream to sulfide oxidizing bacteria in the presence of oxygen, and at a pH in the range 8 to 11, to oxidize the sulfide to elemental sulfur, c) withdrawing from the reactor a treated pulp mill stream comprising sulfur, wherein the portion of the pulp mill stream is mixed with a portion of the sulfide oxidizing bacteria present in the reactor prior to supplying the pulp mill stream to the reactor in step b). [Figure 1]
The present invention relates to a process for the controlling the sodium and sulfur levels in a pulp mill, comprising the steps of: a) providing a pulp mill stream comprising sulfide and having a total alkali concentration of at least 2 Molar; b) supplying a portion of the pulp mill stream to a reactor comprising sulfide oxidizing bacteria and removing sulfide from the pulp mill streamby subjecting said stream to sulfide oxidizing bacteria in the presence of oxygen, and at a pH in the range 8 to 11, to oxidize the sulfide to elemental sulfur, c) withdrawing from the reactor a treated pulp mill stream comprising sulfur, wherein the portion of the pulp mill stream is mixed with a portion of the sulfide oxidizing bacteria present in the reactor prior to supplying the pulp mill stream to the reactor in step b).
A process for aerobic treatment of wastewater is provided, which process comprises: (a) supplying a liquid influent comprising wastewater to a reactor containing granular biomass; (b) subjecting the reaction mixture to aerobic conditions comprising a concentration of dissolved oxygen from 0.1 mg/L to 4.0 mg/L, and a hydraulic retention time from 0.5 to 72 hours; (c) separating the reaction mixture into granular biomass and treated wastewater; and (d) recycling separated granular biomass to the reaction mixture. A bioreactor for the process is also disclosed, comprising a reaction vessel provided with an aeration means, a solids separation device with an inlet in the lower part of the reaction vessel having an outlet line for solids arranged to transport separated solids to a riser driven by airlift action and arranged to transport the solids to the upper part of the reaction chamber.
Water purification apparatus, machines and installations;
filters for water purifiers; parts and accessories for water
purification apparatus, machines and installation (not
included in other classes). Sand; filtration sand.
Water purification apparatus, machines and installations;
settler apparatus for water; parts and accessories for water
purification apparatus, machines, installations, settler
apparatus for water (not included in other classes).
27.
Anaerobic purification device with variable water column
a controlling unit configured to regulate the fluid valve (15) to vary the height of the fluid level in the reactor tank (10) based on at least one of the fluid level detected by the fluid level detector (17) and the gas production rate detected by the gas flow meter (33).
Water filtering apparatus; Component parts and component accessories for water purification apparatus, machines, and installations; Settler apparatus for water, namely, metal cylindrical chamber and screen for use in filtering and removing settable solids from water
Water purification apparatus, machines and installations; filters for water purifiers; parts and accessories for water purification apparatus, machines, and installations, namely structural parts for water purification installations, filters for water purifiers, water conditioning units, waste water treatment tanks Sand; Filtration sand, namely, processed silica sand and crushed quartz mixtures used in filters for potable water purification, waste water processing, industrial process fluids and recreational water filtration
31.
Degassing device for anaerobic purification device
a liquid outlet (38) attached to the bottom part of the hydraulic cyclone (36), the liquid outlet configured to guide degassed fluid outside the hydraulic cyclone.
Water purification apparatus, machines and installations; filters for water purifiers; parts and accessories for water purification apparatus, machines and installation (not included in other classes). Sand; filtration sand.
Water purification apparatus, machines and installations; Settler apparatus for water; parts and accessories for water purification apparatus, machines, installations, settler apparatus for water (not included in other classes).
Wastewater is subjected to aerobic treatment in a process which comprises: (a) supplying a liquid influent comprising wastewater to a reactor containing granular biomass; (b) subjecting the reaction mixture to aerobic conditions comprising a concentration of dissolved oxygen in the range of from 0.1 mg/L to 4.0 mg/L, and a hydraulic retention time in the range of from 0.5 to 72 hours; (c) separating the reaction mixture into granular biomass and treated wastewater; and (d) recycling separated granular biomass to the reaction mixture, A bioreactor for this process comprises a reaction vessel provided with a aeration means, a solids separation device with an inlet in the lower part of the reaction vessel having an outlet line for solids arranged to transport separated solids to a riser driven by airlift action and arranged to transport the solids to the upper part of the reaction chamber.
a plurality of gas lift injectors (4), wherein each gas lift injector (4) is configured to, in operation, transport the mixture of fluid from the fluid inlet (14) and granular filter material from the filter bed (2) to the cavity (5).
A gas-liquid separation device (30) for an anaerobic purification device for purification of wastewater, the gas-liquid separation device comprising: a gas-liquid riser pipe (32); a separation pipe (34) attached to the gas-liquid riser pipe (32), the separation pipe defining an angle with the direction perpendicular to the gas-liquid riser pipe between -45 degrees and +45 degrees, the separation pipe (34) configured to receive fluid from the gas-liquid riser pipe (32); at least one pipe gas outlet (35) located, when assembled with an anaerobic purification device, in a surface along the separation pipe (34)facing away from the ground, the at least one pipe gas outlet (35) configured to lead at least a portion of the gas in the separation pipe (34) outside the gas-liquid separation device; a hydraulic cyclone (36) attached to the separation pipe (34), the hydraulic cyclone configured to receive fluid from the separation pipe; at least one cyclone gas outlet (37) located in the upper side of the hydraulic cyclone (36); the at least one cyclone gas outlet configured to lead the gas entering the hydraulic cyclone (36) outside the hydraulic cyclone; and a liquid outlet (38) attached to the bottom part of the hydraulic cyclone (36), the liquid outlet configured to guide degassed fluid outside the hydraulic cyclone.
An anaerobic purification device for purification of wastewater, the anaerobic purification device comprising: -a reactor tank (10)configured to, when in operation, have a sludge blanket formed at the bottom part; -a fluid inlet (12) for, in operation,introducing influent into the reactor tank, the fluid inlet located in the lower section of the reactor tank (10); -at least one gas-collecting system (13); -at least onegas-liquid separation device (30); -at least one riser pipe (22) connected to the at least one gas-collecting system (13) and discharging into the gas-liquid separation device (30); -a downer pipe (24) connected to the gas-liquid separation device (30) and discharging into the bottom of the reactor tank (10); and -a fluid outlet (16)comprising means for, in operation,varying the height of the fluid level (19) in the reactor tank within a predetermined range, the fluid outlet arranged at the upper section of the reactor tank (10); wherein the fluid level control means comprises: a fluid valve (15) configured to control the height of the fluid in the reactor tank within the predetermined range, a fluid level detector (17), a gas flow meter (33) configured to measure the production rate of gas in the anaerobic purification device, and a controlling unit configured to regulate the fluid valve (15) to vary the height of the fluid level in the reactor tank (10) based on at least one of the fluid level detected by the fluid level detector (17) and the gas production rate detected by the gas flow meter (33).
A gas-liquid separation device (30) for an anaerobic purification device for purification of wastewater, the gas-liquid separation device comprising: a gas-liquid riser pipe (32); a separation pipe (34) attached to the gas-liquid riser pipe (32), the separation pipe defining an angle with the direction perpendicular to the gas-liquid riser pipe between -45 degrees and +45 degrees, the separation pipe (34) configured to receive fluid from the gas-liquid riser pipe (32); at least one pipe gas outlet (35) located, when assembled with an anaerobic purification device, in a surface along the separation pipe (34)facing away from the ground, the at least one pipe gas outlet (35) configured to lead at least a portion of the gas in the separation pipe (34) outside the gas-liquid separation device; a hydraulic cyclone (36) attached to the separation pipe (34), the hydraulic cyclone configured to receive fluid from the separation pipe; at least one cyclone gas outlet (37) located in the upper side of the hydraulic cyclone (36); the at least one cyclone gas outlet configured to lead the gas entering the hydraulic cyclone (36) outside the hydraulic cyclone; and a liquid outlet (38) attached to the bottom part of the hydraulic cyclone (36), the liquid outlet configured to guide degassed fluid outside the hydraulic cyclone.
Wastewater containing a significant level of dissolved readily biodegradable organic compounds matter, such as short-chain fatty acids, and ammonia can be efficiently treated to remove most or all of the organic compounds and the ammonia, with the production of microbial storage compounds such as polyhydroxyalkanoates, by (i) subjecting the wastewater storage compound-accumulating microorganisms (SCAM) in the presence of oxygen, (ii) subjecting at least part of the resulting partly treated wastewater to ammonia-oxidising microorganisms (AOM) in the presence of oxygen and (iii) feeding a gas containing molecular carbon dioxide produced during step (ii) to step (i) so as to lower the pH in step (i).
The present disclosure provides a process for selectively separating a first heavy metal such as copper from a liquid medium containing at least the first heavy metal in dissolved form, by: (a) contacting the liquid medium with a solid sulfide of a second heavy metal such as zinc, said sulfide of the second heavy metal having a solubility which is higher than the solubility of the sulfide of the first heavy metal, in a first reactor, to produce a precipitate of a sulfide of the first heavy metal and a solution containing second heavy metal; (b) separating the precipitate of the first heavy metal sulfide from the solution containing the second heavy metal; (c) contacting the solution of the second heavy metal with a source of sulfide produced by biological conversion of a sulfur compound, in a second reactor, to produce a precipitate of a sulfide of the second heavy metal and a treated solution; and (d) returning at least part of the precipitate of the sulfide of the second heavy metal to step (a). The first and second heavy metals may each be more than one and the biological conversion is especially carried out in the second reactor.
High levels of polyhydroxyalkanoates (PHA) can be produced from wastewater comprising Readily Biodegradable COD (RBCOD) using activated sludge comprising microorganisms capable of accumulating PHA by contacting the wastewater with the activated sludge in the presence of dissolved oxygen during a first period of time, to obtain PHA-loaded activated sludge, and then supplying elements essential for growth such as nitrogen and phosphorus and allowing up-take of these elements and limited growth during a second period of time, the supplied amount of at least of one of said essential elements compared to the amount of RBCOD supplied in step a) limiting the growth to an extent that not all PHA is used for growth, to obtain grown activated sludge; and removing or harvesting part of the PHA-loaded activated sludge and/or part of the grown activated sludge, so that the total average retention time of the sludge is less than 72 h.
The invention provides an apparatus and method for purification of a fluid, the apparatus comprising: -a vessel (1) for receiving, in operation, a filter bed (2) with granular filter material; -a transport system (8) configured to, during operation, transport filter material from a cavity (5) underneath the filter bed (2) to a location (17) above the filter bed; -a fluid inlet (14) for introducing fluid to be purified into the apparatus; -a mixing section (3) adapted to, in operation, provide a mixture of fluid from the fluid inlet and granular filter material from the filter bed in a part of the vessel beneath the mixing section; and -a plurality of gas lift injectors (4), wherein each gas lift injector (4) is configured to, in operation, transport the mixture of fluid from the fluid inlet (14) and granular filter material from the filter bed (2) to the cavity (5).
A process for removing sulphide from an aqueous solution comprising sulphide is disclosed, in which the aqueous solution is subjected to sulphide-oxidizing bacteria in the presence of oxygen in a reactor to oxidize sulphide to elemental sulphur. According to the process, a molecular-oxygen containing gas is supplied to a reactor containing the sulphide-oxidizing bacteria in an aqueous medium, such that one or more aerated zones and one or more non-aerated zones are created in the aqueous medium with upward liquid flow in the aerated zones and downward liquid flow in the non-aerated zones; and a feed stream of the aqueous solution comprising sulphide is injected into the reactor in the one or more non-aerated zones, wherein the one or more aerated zone(s) are not separated from the one or more non-aerated zone(s) by means of vertically extending reactor internal.
B01D 53/14 - Separation of gases or vapoursRecovering vapours of volatile solvents from gasesChemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases or aerosols by absorption
installations for the anaerobic treatment (purification of fermentation) of waste water or wastle sludge; sewage disposal facility; Purification installations for sewage, waste water and waste.
Hydrogen sulfide can be removed from a liquid effluent of an anaerobic reactor, by subsequently: —contacting the effluent liquid in counter current with a treated product gas of the anaerobic reactor to absorb hydrogen sulfide in the gas, —collecting the desulfurized effluent liquid after said contacting, —discharging at least part of the collected desulfurized effluent recirculation liquid as a treated effluent. To a remaining part of the desulfurized effluent waste water can be added and mixed, and the mixed water can be fed to the anaerobic reactor. Spent gas of the contacting step can be combined with sulfide-containing product gas of the anaerobic reactor and treated by desulfurization.
The invention relates to a process for producing a microbial storage compound, in particular polyhydroxyalkanoate, using micro-organisms capable of accumulating such microbial storage compound,wherein such micro-organisms are selected and the microbial storage compound is accumulated by carrying out the so-called feast phase of the selection step and the accumulation of the microbial storage compound in selected micro-organisms in the same reactor and carrying out the so-called famine phase of the selection step in a separate, smaller, reactor.
The invention relates to a process for removing sulphide from an aqueous solution comprising sulphide, wherein the aqueous solution is subjected to sulphide-oxidising bacteria in the presence of oxygen in a reactor to oxidise sulphide to elemental sulphur, the process comprising: a) providing the aqueous solution comprising sulphide; b) supplying a molecular-oxygen containing gas to the reactor containing the sulphide-oxidising bacteria in an aqueous medium, such that one or more aerated zones and one or more non-aerated zones are created in the aqueous medium with upward liquid flow in the aerated zones and downward liquid flow in the non-aerated zones; c) supplying a feed stream of the aqueous solution comprising sulphide to the reactor by injecting the feed stream in the one or more non-aerated zones, wherein the one or more aerated zone(s) are not separated from the one or more non-aerated zone(s) by means of vertically extending reactor internal. The invention further relates to a process for removing sulphide from an aqueous solution comprising sulphide using such process and to a reactor suitable to be used in such process.
Provided is a process for removing sulphide from an aqueous solution comprising sulphide, wherein the aqueous solution is subjected to sulphide-oxidising bacteria in the presence of oxygen in a reactor to oxidise sulphide to elemental sulphur, the process comprising: a) providing the aqueous solution comprising sulphide; b) supplying a molecular-oxygen containing gas to the reactor containing the sulphide-oxidising bacteria in an aqueous medium, such that one or more aerated zones and one or more non-aerated zones are created in the aqueous medium with upward liquid flow in the aerated zones and downward liquid flow in the non-aerated zones; c) supplying a feed stream of the aqueous solution comprising sulphide to the reactor by injecting the feed stream in the one or more non-aerated zones, wherein the one or more aerated zone(s) are not separated from the one or more non-aerated zone(s) by means of vertically extending reactor internal.
The invention relates to a process for anaerobic wastewater treatment wherein granular and non-granular sludge are formed, the process comprising: a)supplying a wastewater influent containing COD to a reactor vessel containing granular active sludge; b)subjecting the wastewater influent in the reactor vessel to anaerobic treatment conditions; c)obtaining a liquid comprising treated wastewater and dispersed non-granular sludge that is essentially free of granular sludge; d)supplying at least part of the liquid obtained in step c) to a device for removal and/or inactivation of sludge and removing or inactivating at least part of the non-granular sludge to obtain a liquid depleted in active sludge; and e)recycling at least part of the liquid depleted in active sludge to the reactor vessel or, in case the device for removal and/or inactivation of sludge is located in the reactor vessel, maintaining at least part of the liquid depleted in active sludge in the reactor vessel.
The invention relates to a process for biological removal of nitrogen from wastewater comprising: (a) providing a stream of wastewater comprising ammonium; (b) continuously supplying the stream of wastewater to a reactor containing granular sludge comprising granules having a core of anammox bacteria and an outer rim of ammonia oxidizing bacteria; (c) subjecting the wastewater in the reactor to ammonium oxidation under ammonium oxidizing conditions comprising a temperature in the range of from 5 to 25 °C, a concentration of dissolved oxygen in the wastewater in the range of from 0.4 mg/L to 4.0 mg/L, and a hydraulic retention time of the wastewater in the reactor in the range of from 0.5 hours to 1.5 days, to obtain a gaseous stream comprising nitrogen and a dispersion of granular sludge and non¬ granular sludge in treated wastewater; and (d) continuously separating the dispersion obtained into a stream comprising granular sludge and a stream comprising treated wastewater and non-granular sludge and recycling the stream comprising granular sludge to the reactor and discharging the non-granular sludge from the process, wherein the granular sludge has a retention time in the reactor of at least ten times the hydraulic retention time, and wherein the retention time of any non-granular sludge in the reactor is equal to or at most three times the hydraulic retention time.
Hydrogen sulfide can be removed from a liquid effluent of an anaerobic reactor, by subsequently: -contacting the effluent liquid in counter current with a treated product gas of the anaerobic reactor to absorb hydrogen sulfide in the gas, -collecting the desulfurised effluent liquid after said contacting, -discharging at least part of the collected desulfurised effluent recirculation liquid as a treated effluent. To a remaining part of the desulfurised effluent waste water can be added and mixed, and the mixed water can be fedto the anaerobic reactor. Spent gas of the contacting step can be combined with sulfide-containing product gas of the anaerobic reactor and treated by desulfurisation.
01 - Chemical and biological materials for industrial, scientific and agricultural use
05 - Pharmaceutical, veterinary and sanitary products
Goods & Services
Fertilizers and chemicals for use in agriculture, horticulture and forestry, except fungicides, insecticides, and parasiticides Chemicals for use in agriculture, horticulture and forestry, namely, fungicides, insecticides, and parasiticides
56.
REACTOR AND METHOD FOR THE ANAEROBIC TREATMENT OF SLUDGE CONTAINING PHOSPHOROUS AND NITROGEN
Thin sludge can be anaerobically digested with improved phosphate removal in the form of struvite by using a downflow anaerobic digestion reactor (1) which is operated with crystal seeding at the top and enhanced crystal removal at the bottom. The reactor has liquid inlet means (2) at the top, and an exit means (5) at the bottom, the bottom part of the reactor (1) being provided with a rotating scraper (70) capable of collecting solid material from the bottom of the reactor (1) and moving said collected material to said exit means. Magnesium (3) is added as necessary for optimum struvite formation.
The invention provides a membrane module comprising a first membrane (64) and at least one further body(61, 65), which may be a second membrane(65), a wall or an electrode(61), arranged in parallel with said first membrane. A spacer (11) is positioned between said first membrane and said further parallel body, and provides a flow-through area comprising a plurality of parallel passages connecting said one end and other end of the parallel bodies, and said passages have a width between 2 and 20 mm. The module further comprises inlet means (21, 31) for introducing liquid and gas at the top end of the parallel bodies and outlet means (41) for carrying off liquid and gas at the bottom end of the parallel bodies. The module may be part of an electromembrane unit(5), further comprising electrodes(60, 61). The module is used in a process of changing the composition and/or the pH of raw liquids without being hampered by coarse solids suspended in the liquid.
The invention relates to a purifier (100) for the purification of a fluid such as wastewater, the purifier comprising:—a reaction vessel (10) for a fluid, the reaction vessel having a reaction chamber (11) and a bottom (12);—a downer (14) having a top end (91) and a bottom end (92), wherein the top end of the downer is connected to a fluid collector (13) to collect fluid from the reaction vessel (10), and the downer is arranged to transport the fluid towards the bottom (12) of the reaction vessel;—a solids separation device (20) arranged to separate solids from liquid, the solids separation device comprising a fluid inlet (72) arranged to introduce fluid into the solids separation device and a liquid discharge (56) arranged to remove separated liquid from the solids separation device; wherein the fluid inlet of the solids separation device (20) is connected to the bottom end (92) of the downer and the solids separation device is located on or near the bottom (12) of the reaction vessel.
The invention relates to a bioreactor (1) comprising a reactor vessel (41) having a mixing chamber (3) separated by a partition (44) from a reaction chamber (2) located generally above the mixing chamber (3), the mixing chamber (3) having an inlet system (4) for influent or a mixture of influent and recycled material, wherein the inlet system (4) has an outlet opening (60-64) in the mixing chamber (3). In an embodiment the partition (44) has an opening (66) forming a connection between the mixing chamber (3) and the reaction chamber (2), wherein the outlet opening (60-64) of the inlet system (4) is directed at the opening in the partition. In an embodiment the mixing chamber (3) has a skeleton for reinforcing the mixing chamber.
The invention relates to a purifier (100) for the purification of a fluid such as wastewater, the purifier comprising: -a reaction vessel (10) for a fluid, the reaction vessel having a reaction chamber (11) and a bottom (12); -a downer (14) having a top end (91) and a bottom end (92), wherein the top end of the downer is connected to a fluid collector (13) to collect fluid from the reaction vessel (10), and the downer is arranged to transport the fluid towards the bottom (12) of the reaction vessel; -a solids separation device (20) arranged to separate solids from liquid, the solids separation device comprising a fluid inlet (72) arranged to introduce fluid into the solids separation device and a liquid discharge (56) arranged to remove separated liquid from the solids separation device; wherein the fluid inlet of the solids separation device (20) is connected to the bottom end (92) of the downer and the solids separation device is located on or near the bottom (12) of the reaction vessel.
The invention relates to a purifier (100) for the purification of a fluid such as wastewater, the purifier comprising: -a reaction vessel (10) for a fluid, the reaction vessel having a reaction chamber (11) and a bottom (12); -a downer (14) having a top end (91) and a bottom end (92), wherein the top end of the downer is connected to a fluid collector (13) to collect fluid from the reaction vessel (10), and the downer is arranged to transport the fluid towards the bottom (12) of the reaction vessel; -a solids separation device (20) arranged to separate solids from liquid, the solids separation device comprising a fluid inlet (72) arranged to introduce fluid into the solids separation device and a liquid discharge (56) arranged to remove separated liquid from the solids separation device; wherein the fluid inlet of the solids separation device (20) is connected to the bottom end (92) of the downer and the solids separation device is located on or near the bottom (12) of the reaction vessel.
A three phase separator or settling device (2) or a digester (1) including the settling device. The settling device can receive a fluid containing liquid, gas and particulate material. The settling device includes a settling chamber to be filled with this fluid. The device can also include a liquid-discharge (5) for discharging liquid from the settling chamber and fitted close to the liquid level (30), a fluid inlet (6) for supplying the fluid into the settling chamber (3), a particulate material separation device (7) and a sludge outlet (8). A flow of fluid is provided into and out of the settling device and settling chamber. The inlet includes a gas separation device (4) for separating gas from the fluid including channels, the inlet positioned close to the fluid level. The inlet and transition (75) into the settling chamber is arranged to create a pre-separated flow pattern including a generally laminar liquid flow.
The invention provides a method for the filtration of a bioreactor liquid (10) from a bioreactor (1) with a cross-flow membrane module (20) comprising one or more membranes (40). The method comprises feeding part of the bioreactor liquid (10) to a liquid inlet (21) of the cross-flow membrane module (20), transporting the bioreactor liquid (10) through the cross-flow membrane module (20) in a cross-flow mode, and removing a retentate (12) from a liquid outlet (22) of the cross-flow membrane module (20). The cross-flow membrane module (20) is arranged to allow a liquid downward flow of the bioreactor liquid (10) through the cross-flow membrane module (20). The method further comprises providing the liquid downward flow and a downward gas flow of a gas (30) through the cross-flow membrane module (20). Fouling of the membranes is relatively good prevented or reduced in time. Further, the liquid flow may be reduced relative to conventional configurations.
The invention relates a three phase separator or settling device (2) or a digester (1) comprising the settling device (2). The settling device can receive a fluid containing liquid, gas and particulate material. The settling device (2) comprises a settling chamber (3) which is to be filled with this fluid. The device can also comprise a liquid-discharge (5) for discharging liquid from the settling chamber and fitted close to the liquid level (30), a fluid inlet (6) for supplying the fluid into the settling chamber (3), a particulate material separation device (7) and a sludge outlet (8) from the settling chamber (3). According to a method of the invention a flow of fluid is provided into and out of the settling device (2) and settling chamber (3). According to an aspect of the invention the inlet (6) to the settling chamber (3) comprises a gas separation device (4) for separating gas from the fluid comprising channels, said inlet (6) positioned close to the fluid level (30). According to a further aspect the inlet (6) and transition (75) into the settling chamber is arranged to create a pre-separated flow pattern comprising a generally laminar liquid flow.
The invention relates to a reactor and also to a gas lift pump for said reactor. The reactor comprises a reactor vessel provided with fluid conta ining therein a bed of particle material. The reactor further comprises the gas lift pump according to the invention, which is arranged in the reactor vessel. The gas lift pump comprises a vertical first tube (inner tube) having an open underside and upper side, and also a mouthpiece for blowing in a gas. The open underside of the first tube (inner tube) lies in the bed of particle material. The mouthpiece is provided at the underside of the first tube (inner tube) in such a way that blowing gas into the fi rst tube (inner tube) brings about a reduction in the density of the fluid. The gas lift pump further comprises a second tube (outer tube) having an open underside and an open upper side. The underside of the second tube (outer tube) lies concentrically ar ound the underside of the first tube (inner tube) to produce a concentric channel at this location.
B01J 8/22 - Chemical or physical processes in general, conducted in the presence of fluids and solid particlesApparatus for such processes with fluidised particles with liquid as a fluidising medium gas being introduced into the liquid
C02F 3/06 - Aerobic processes using submerged filters
C02F 3/22 - Activated sludge processes using circulation pipes
40 - Treatment of materials; recycling, air and water treatment,
42 - Scientific, technological and industrial services, research and design
Goods & Services
Installations for waste water purification. Treatment of waste water; recycling of waste; destruction of
waste. Chemical analysis; chemical, bacteriological and
microbiological testing; consultancy and engineering in the
field of waste water treatment and recycling of waste.
40 - Treatment of materials; recycling, air and water treatment,
42 - Scientific, technological and industrial services, research and design
Goods & Services
treatment of waste water; recycling of waste water chemical analysis; chemical, bacteriological and micro-biological research; consultancy and engineering in relation to the treatment of waste water and the recycling of waste and trash
40 - Treatment of materials; recycling, air and water treatment,
42 - Scientific, technological and industrial services, research and design
Goods & Services
(1) Treatment of waste water; recycling of waste water.
(2) Chemical analysis; chemical, bacteriological and micro-biological research; consultancy and engineering in relation to the treatment of waste water and the recycling of waste and trash.
