Abstract

The present disclosure provides a multi stage activated sludge system for biological wastewater treatment, having improved sludge settling properties, the multi stage activated sludge system comprising: an MABR tank comprising an MABR module, an MABR tank aeration unit configured for periodically aerating mixed liquor within the MABR tank, and an outlet from the MABR tank configured for selectively discharging partially settled sludge from the MABR tank, thus selecting for faster settling sludge.

IPC Classes  ?

• C02F 3/20 - Activated sludge processes using diffusers
• C02F 3/00 - Biological treatment of water, waste water, or sewage

Abstract

A system for treatment of ammonia in a feed water stream containing ammonia, the system comprising: an ion exchanger unit comprising: a feed inlet configured to receive the feed water stream; an ion exchanger bed configured to exchange the ammonia in the feed water stream and to provide thereby a treated effluent; and a treated effluent outlet configured to discharge the treated effluent from the ion exchanger unit; and a regeneration unit in fluid communication with the ion exchanger unit and configured to provide a regeneration brine for regenerating the ion exchanger bed, said regeneration unit comprising a Membrane Aerated Biofilm Reactor (MABR) for recovery of the regeneration brine.

IPC Classes  ?

• C02F 1/42 - Treatment of water, waste water, or sewage by ion-exchange
• B01D 63/10 - Spiral-wound membrane modules
• B01J 49/06 - Regeneration or reactivation of ion-exchangersApparatus therefor of fixed beds containing cationic exchangers
• C02F 3/12 - Activated sludge processes
• C02F 3/30 - Aerobic and anaerobic processes
• C02F 101/16 - Nitrogen compounds, e.g. ammonia

Abstract

The present disclosure provides a multi stage activated sludge system for biological wastewater treatment, having improved sludge settling properties, the multi stage activated sludge system comprising: an MABR tank comprising an MABR module, an MABR tank aeration unit configured for periodically aerating mixed liquor within the MABR tank, and an outlet from the MABR tank configured for selectively discharging partially settled sludge from the MABR tank, thus selecting for faster settling sludge.

IPC Classes  ?

• C02F 3/12 - Activated sludge processes
• C02F 3/20 - Activated sludge processes using diffusers
• C02F 3/00 - Biological treatment of water, waste water, or sewage
• C02F 3/30 - Aerobic and anaerobic processes

Abstract

A wastewater treatment method comprising splitting wastewater influent into a first influent stream and second influent stream; subjecting the first influent stream to treatment within at least one membrane aerated biofilm reactor (MABR) to provide a MABR effluent; subjecting the second influent stream and said MABR effluent to treatment within an anaerobic ammonium oxidation (Anammox) reactor to obtain treated water effluent; and discharging from said Anammox reactor said treated water effluent. Also provided is a wastewater treatment system comprising at least one membrane aerated biofilm reactor (MABR) module; an anaerobic ammonium oxidation (Anammox) reactor comprising at least one inlet and an outlet for discharging treated water effluent; and a wastewater influent arrangement configured for splitting a wastewater influent to a first influent stream and a second influent stream and for supplying said first influent stream to said MABR module and said second influent stream to said Anammox reactor.

IPC Classes  ?

• C02F 9/00 - Multistage treatment of water, waste water or sewage
• C02F 3/00 - Biological treatment of water, waste water, or sewage

Abstract

A system for treatment of ammonia in a feed water stream containing ammonia, the system comprising: an ion exchanger unit comprising: a feed inlet configured to receive the feed water stream; an ion exchanger bed configured to exchange the ammonia in the feed water stream and to provide thereby a treated effluent; and a treated effluent outlet configured to discharge the treated effluent from the ion exchanger unit; and a regeneration unit in fluid communication with the ion exchanger unit and configured to provide a regeneration brine for regenerating the ion exchanger bed, said regeneration unit comprising a Membrane Aerated Biofilm Reactor (MABR) for recovery of the regeneration brine.

IPC Classes  ?

• C02F 3/30 - Aerobic and anaerobic processes
• C02F 3/34 - Biological treatment of water, waste water, or sewage characterised by the microorganisms used
• C02F 101/16 - Nitrogen compounds, e.g. ammonia
• B01J 39/00 - Cation exchangeUse of material as cation exchangersTreatment of material for improving the cation exchange properties
• B01J 49/06 - Regeneration or reactivation of ion-exchangersApparatus therefor of fixed beds containing cationic exchangers

Abstract

The present disclosure provides a wastewater treatment method comprising splitting wastewater influent into a first influent stream and a second influent stream; subjecting the first influent stream to treatment within at least one membrane aerated biofilm reactor (MABR) to provide a MABR effluent; subjecting the second influent stream and said MABR effluent to treatment within an anaerobic ammonium oxidation (Anammox) reactor to obtain treated water effluent; and discharging from said Anammox reactor said treated water effluent. Also provided by the present disclosure is a wastewater treatment system comprising at least one membrane aerated biofilm reactor (MABR) module; an anaerobic ammonium oxidation (Anammox) reactor comprising at least one inlet and an outlet for discharging treated water effluent; and a wastewater influent arrangement configured for splitting a wastewater influent to a first influent stream and a second influent stream and for supplying said first influent stream to said MABR module and said second influent stream to said Anammox reactor.

IPC Classes  ?

• C02F 3/30 - Aerobic and anaerobic processes
• C02F 3/00 - Biological treatment of water, waste water, or sewage
• C02F 9/00 - Multistage treatment of water, waste water or sewage
• C02F 101/16 - Nitrogen compounds, e.g. ammonia

Abstract

The present disclosure concerns methods of treating waste activated sludge by a membrane aerated sludge digester provided with membrane-aerated biofilm reactor (MABR) modules comprising oxygen-permeable water-impermeable membranes, said membranes being configured for supporting biofilm growth thereon to reduce of volatile soluble solids (VSS) concentration in the sludge to obtain aerobically treated sludge.

IPC Classes  ?

• C02F 11/02 - Biological treatment
• C02F 3/20 - Activated sludge processes using diffusers
• C02F 3/10 - PackingsFillingsGrids
• C02F 3/22 - Activated sludge processes using circulation pipes
• C02F 3/30 - Aerobic and anaerobic processes

Abstract

Provided is a wastewater treatment process including: (a) circulating wastewater including biodegradable organic material, between an anaerobic digester (AD) and at least one microbial electrolysis cell (MEC), the MEC including an anode and a cathode; (b) applying voltage on said anode and said cathode; and (c) discharging from said AD biogas with a methane fraction of above 70% v/v. Also provided is a biological wastewater treatment system including wastewater inlet, and (i) an anaerobic digester (AD) comprising biogas outlet, and effluent outlet; and (ii) at least one microbial electrolysis cell (MEC) including an anode and a cathode; said AD and said at least one MEC being in liquid communication through liquid circulation lines configured for at least circulating wastewater between said AD and said at least one MEC.

IPC Classes  ?

• C02F 3/00 - Biological treatment of water, waste water, or sewage
• C02F 3/28 - Anaerobic digestion processes
• H01M 8/16 - Biochemical fuel cells, i.e. cells in which microorganisms function as catalysts
• C02F 1/461 - Treatment of water, waste water, or sewage by electrochemical methods by electrolysis

Abstract

The present disclosure provides a water treatment module, a bioreactor comprising one or more of such modules and a receptive water treatment system. Also provided herein is a method making use of the above module, bioreactor and system. The water treatment module comprises (i) at least one elongated gas enclosure comprising a gas inlet and two vertical walls, at least one vertical wall comprising a water-impermeable and gas-permeable membrane having a water-facing side and a gas-facing side, the two vertical walls separating between water external to the enclosure and gas within the enclosure, the gas enclosure being in a rolled or folded configuration to thereby define a convoluted horizontal path and one or more water-treatment spaces formed between opposite water facing sides of the enclosure; and (ii) a diffuser arrangement comprising gas diffusers configured for introducing a stream of gas into the one or more water treatment spaces.

IPC Classes  ?

• C02F 3/20 - Activated sludge processes using diffusers
• C02F 3/10 - PackingsFillingsGrids
• C02F 3/30 - Aerobic and anaerobic processes
• C02F 3/12 - Activated sludge processes
• C02F 101/16 - Nitrogen compounds, e.g. ammonia

Abstract

Provided is a water treatment module including a bundle of hollow fiber membranes that includes a treatment portion extending between bottom and top ends and at least one gas diffuser. The membranes may be gas permeable and water impermeable. At least one end of the hollow fiber membranes is linked to a source of biofilm growth-supporting gas (BGSG) and configured to permit inlet of said BGSG into the hollow fiber membranes. Also provided herein are devices, systems and methods making use of the module.

IPC Classes  ?

• C02F 3/20 - Activated sludge processes using diffusers
• C02F 3/10 - PackingsFillingsGrids
• C02F 3/26 - Activated sludge processes using pure oxygen or oxygen-rich gas
• B01D 63/02 - Hollow fibre modules
• B01D 63/04 - Hollow fibre modules comprising multiple hollow fibre assemblies

Abstract

The present disclosure provides a method for treating a natural water body for removal of pollutants, comprising (i) submerging one or more water treatment units having a water-tight enclosure that comprises an oxygen-permeable, water impermeable membrane for releasing oxygen into the water by permeation therethrough; (ii) fixing the one or more water treatment units within the water body in a manner to permit polluted portions of the water body to come into contact with said one or more units; and (iii) feeding oxygen-containing gas into the enclosure of said one or more units. Also provided by the present disclosure is a system for treating a polluted natural water body, comprising (i) one or more water treatment units each having a water-tight enclosure that comprises an oxygen-permeable, water impermeable membrane for releasing oxygen into the surrounding medium by permeation therethrough; (ii) a fixing arrangement for fixing said units within the water body such that the unit is fully submerged therein; (iii) at least one gas inlet in said unit configured for receiving an oxygen-containing gas; and (iv) at least one gas outlet.

IPC Classes  ?

• C02F 7/00 - Aeration of stretches of water
• B01F 3/04 - Mixing, e.g. dispersing, emulsifying, according to the phases to be mixed gases or vapours with liquids
• C02F 101/30 - Organic compounds

Abstract

The present disclosure provides a wastewater treatment process comprising: (a) circulating wastewater comprising biodegradable organic material, between an anaerobic digester (AD) and at least one microbial electrolysis cell (MEC), the MEC comprising an anode and a cathode; (b) applying voltage on said anode and said cathode; and (c) discharging from said AD biogas with a methane fraction of above 70%v/v. Also provided by the present disclosure is a biological wastewater treatment system (100) comprising wastewater inlet (104), and (i) an anaerobic digester (AD) comprising biogas outlet (106), and effluent outlet (108); and (ii) at least one microbial electrolysis cell (MEC) comprising an anode and a cathode; said AD and said at least one MEC being in liquid communication through liquid circulation lines (110) configured for at least circulating wastewater between said AD and said at least one MEC.

IPC Classes  ?

• C02F 3/28 - Anaerobic digestion processes
• C02F 1/461 - Treatment of water, waste water, or sewage by electrochemical methods by electrolysis

Abstract

The present disclosure concerns a clarifier unit of wastewater treatment system and a system comprising said unit, the unit comprising a treatment tank having a bottom wall, side walls, influent inlet, clarified water outlet and a sludge discharge outlet; wherein the unit has an oxygen supply assembly, comprising one or more oxygen supply elements confined to a bottom portion of the tank, each of which comprises (i) a water-tight enclosure comprising oxygen-permeable membranes permitting oxygen permeation by e.g. diffusion from the enclosure to a surrounding medium, and (ii) a gas inlet for receiving an oxygen-containing gas and a gas outlet for removal of gas.

IPC Classes  ?

• C02F 1/72 - Treatment of water, waste water, or sewage by oxidation
• C02F 3/10 - PackingsFillingsGrids
• C02F 3/20 - Activated sludge processes using diffusers
• C02F 1/00 - Treatment of water, waste water, or sewage

Abstract

The present disclosure provides a water treatment module, a bioreactor comprising one or more of such modules and a receptive water treatment system. Also provided herein is a method making use of the above module, bioreactor and system. The water treatment module comprises (i) at least one elongated gas enclosure comprising a gas inlet and two vertical walls, at least one vertical wall comprising a water-impermeable and gas-permeable membrane having a water-facing side and a gas-facing side, the two vertical walls separating between water external to said enclosure and gas within said enclosure, the gas enclosure being in a rolled or folded configuration to thereby define a convoluted horizontal path and one or more water-treatment spaces formed between opposite water facing sides of the enclosure; and (ii) a diffuser arrangement comprising gas diffusers configured for introducing a stream of gas into the one or more water treatment spaces.

IPC Classes  ?

• C02F 3/20 - Activated sludge processes using diffusers
• C02F 3/30 - Aerobic and anaerobic processes
• C02F 3/10 - PackingsFillingsGrids
• C02F 3/12 - Activated sludge processes
• C02F 101/16 - Nitrogen compounds, e.g. ammonia

Abstract

A bacterial fuel cell including a plurality of anodes and a plurality of cathodes in liquid communication with a liquid to be purified, the plurality of anodes and the plurality of cathodes each including a metal electrical conductor arranged to be electrically coupled across a load in an electrical circuit and an electrically conductive coating at least between the metal electrical conductor and the liquid to be purified, the electrically conductive coating being operative to mutually seal the liquid and the electrical conductor from each other.

IPC Classes  ?

• C25B 11/04 - ElectrodesManufacture thereof not otherwise provided for characterised by the material
• C02F 1/461 - Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
• C02F 3/00 - Biological treatment of water, waste water, or sewage
• C02F 3/10 - PackingsFillingsGrids
• H01M 4/86 - Inert electrodes with catalytic activity, e.g. for fuel cells
• H01M 4/90 - Selection of catalytic material
• H01M 8/16 - Biochemical fuel cells, i.e. cells in which microorganisms function as catalysts
• C25B 1/04 - Hydrogen or oxygen by electrolysis of water

Abstract

A bacterial fuel cell including at least one anode and at least two cathodes in liquid communication with a liquid to be treated, the at least one anode being separated from the at least two cathodes by at least first and second electrically insulating spacers and the at least one anode and the at least two cathodes being electrically connected across an external load and the at least one anode and the at least two cathodes being wound together generally in a spiral configuration together with at least a third electrically insulating spacer.

IPC Classes  ?

• H01M 8/16 - Biochemical fuel cells, i.e. cells in which microorganisms function as catalysts
• H01M 8/02 - Fuel cellsManufacture thereof Details
• H01M 4/86 - Inert electrodes with catalytic activity, e.g. for fuel cells
• H01M 8/00 - Fuel cellsManufacture thereof
• C02F 3/00 - Biological treatment of water, waste water, or sewage
• H01M 8/24 - Grouping of fuel cells, e.g. stacking of fuel cells
• H01M 4/88 - Processes of manufacture

Abstract

A system for treating wastewater including at least one water-treatment pathway having at least one wastewater inlet, at least one oxygen-permeable, water-impermeable wall, separating an interior of the pathway from outside air, and at least one treated wastewater outlet and arranged for at least aerobic treatment of the wastewater as it flows from the at least one wastewater inlet to the at least one treated wastewater outlet, at least one wastewater supply conduit, supplying the wastewater to the at least one wastewater inlet of the water-treatment pathway and at least one treated wastewater conduit, supplying treated wastewater from the at least one treated wastewater outlet of the at least one water-treatment pathway.

IPC Classes  ?

• C02F 3/02 - Aerobic processes
• C02F 3/10 - PackingsFillingsGrids
• B01D 63/10 - Spiral-wound membrane modules
• C02F 3/30 - Aerobic and anaerobic processes

Abstract

A bacterial fuel cell including a plurality of anodes and a plurality of cathodes in liquid communication with a liquid to be purified, the plurality of anodes and the plurality of cathodes each including a metal electrical conductor arranged to be electrically coupled across a load in an electrical circuit and an electrically conductive coating at least between the metal electrical conductor and the liquid to be purified, the electrically conductive coating being operative to mutually seal the liquid and the electrical conductor from each other.

IPC Classes  ?

• H01M 8/16 - Biochemical fuel cells, i.e. cells in which microorganisms function as catalysts
• C25B 9/00 - Cells or assemblies of cellsConstructional parts of cellsAssemblies of constructional parts, e.g. electrode-diaphragm assembliesProcess-related cell features
• H01M 4/86 - Inert electrodes with catalytic activity, e.g. for fuel cells
• C02F 1/461 - Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
• C02F 3/00 - Biological treatment of water, waste water, or sewage
• C02F 3/10 - PackingsFillingsGrids
• H01M 4/90 - Selection of catalytic material