Abstract

The present invention relates to a plant and a method for treating organic waste, said plant and method providing an integrated system for waste treatment which allows optimization of the re-use of treated organic waste, by recovering and exploiting all the components of the incoming waste. To this purpose, after a series of pretreatment operations (20 - 50) intended to separate the organic fraction from ferrous, plastic and inert materials, the treated waste is subjected at first to an anaerobic treatment (60) with production of biogas and digestate, and the digestate is then subjected to an aerobic treatment (80) with production of compost. Advantageously, the invention provides that handling of the waste to be treated takes place in an automated manner, thus reducing personnel exposure to bad odors and contaminants.

IPC Classes  ?

• B03B 9/06 - General arrangement of separating plant, e.g. flow sheets specially adapted for refuse
• B09B 3/00 - Destroying solid waste or transforming solid waste into something useful or harmless

Abstract

The present invention relates to a method and a plant for producing secondary solid fuel (SSF). The invention provides for removing fine and heavy waste from the flow of treated waste and further subdividing the remaining waste into intermediate waste and light waste (137). According to the invention, only the fraction of intermediate waste is subjected to the removal of chlorinated plastics (PVC). Advantageously, thanks to the fact that only a small fraction of the treated waste is subjected to said removal of the chlorinated plastics (134), the invention allows to obtain high efficiency in the treatment of waste and in the production of SSF. In a preferred embodiment of the invention, said intermediate waste fraction is also subjected to the removal of ferrous metals and non-ferrous metals (aluminum) (135).

IPC Classes  ?

• B09B 3/00 - Destroying solid waste or transforming solid waste into something useful or harmless
• B03B 9/06 - General arrangement of separating plant, e.g. flow sheets specially adapted for refuse
• C10L 5/40 - Solid fuels essentially based on materials of non-mineral origin
• C10L 5/48 - Solid fuels essentially based on materials of non-mineral origin on industrial residues or waste materials

Abstract

The present invention relates to a method and a plant (1) for waste disposal which provide for a recirculating arrangement (17) for recirculating the leachates generated by the processes of waste treatment into the plant itself, namely into the biofilter (11) of said plant. The invention allows to treat the leachates without the need for providing a dedicated arrangement for purification and disposal. In addition, introducing the recirculated leachates into the biofilter (11) represents an additional irrigation system for the filtering material of the biofilter and contributes to maintain its humidity advantageously high. Preferably, the leachates are introduced into the biofilter at an intermediate height of the biofiltering material bed, so as to obtain a kind of "submerged irrigation" of the biofilter. More preferably, the leachates are introduced into the biofilter as homogeneously and dispersedly as possible, so as to obtain a kind of "micro-irrigation" system for the biofilter.

IPC Classes  ?

• B09B 3/00 - Destroying solid waste or transforming solid waste into something useful or harmless
• B01D 53/84 - Biological processes
• B03B 9/06 - General arrangement of separating plant, e.g. flow sheets specially adapted for refuse

Abstract

The present invention relates to an apparatus (1) for and a method of disintegrating biomasses, more particularly biomasses provided as bales. The present invention finds particular application in plants for pre-treating biomasses intended for a biorefinery or a similar facility for producing biofuels. According to the invention, the apparatus (1) for disintegrating biomasses includes two separate and serially arranged stations (11, 21), namely a first station (1) for coarse disintegration of the biomasses and a second station (21) for fine disintegration of said biomasses. Correspondingly, the method of disintegrating biomasses according to the invention includes two separate and successive steps, namely a first step of coarse disintegration of the biomasses and a subsequent second step of fine disintegration of said biomasses. Thanks to the two-step disintegration performed according to the invention, it is possible to deal with high biomass throughputs, while keeping the electrical power consumption limited and supplying at the output an effectively disintegrated product.

IPC Classes  ?

• D21B 1/06 - Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres by dry methods
• B02C 19/22 - Crushing mills with screw-shaped crushing means

Abstract

The present invention relates to a soaking vessel for soaking biomasses, more particularly for soaking biomasses intended for a biorefinery or similar facility for producing biofuels. Thanks to the provision of specific measures for advancing the biomasses through the basin and a specific extracting device (11) for extracting them from said basin, the soaking vessel (1) according to the invention allows to soak high flow rates, in the range of 20 - 50 t/h, of biomasses and extract them for transferring them to the subsequent processing steps. In a preferred embodiment of the invention, the soaking vessel (1) is further provided with means for removing foreign bodies (15, 17, 19), whereby simultaneously with soaking of the biomass a removal of foreign bodies that are initially contained inside said biomass and separate therefrom during its advance movement through the soaking vessel (1) can be effected.

IPC Classes  ?

• D21B 1/02 - Pretreatment of the raw materials by physical or chemical means
• D21B 1/06 - Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres by dry methods
• D21B 1/12 - Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres by wet methods by the use of steam

Abstract

The present invention relates to a method for pre-treating biomasses, more particularly for pre-treating biomasses intended for a biorefinery or similar facility for producing biofuels. The method for pre-treating biomasses according to the invention comprises a shredding step (40) and, upstream of said shredding step, a soaking step (30), in particular by immersion in corresponding soaking vessels, and simultaneous removal of foreign bodies from said biomasses (30'). The present invention further relates to a plant for pre-treating biomasses (100) capable of implementing the above-described method and comprising to this aim a shredding station (140) for shredding the biomasses and, upstream of said shredding station, a soaking station (130), in particular comprising one or more soaking vessels (132).

IPC Classes  ?

• D21B 1/02 - Pretreatment of the raw materials by physical or chemical means
• D21B 1/06 - Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres by dry methods
• D21B 1/12 - Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres by wet methods by the use of steam

Abstract

The present invention relates to a method for pre-treating biomasses, more particularly for pre-treating biomasses intended for a biorefinery or similar facility for producing biofuels. The method for pre-treating biomasses according to the invention comprises a step of shredding the biomasses (40) and, upstream of said shredding step, a step of removing foreign bodies (30) from said biomasses, and, upstream or downstream of said shredding step (40), a step of soaking said biomasses (50). The present invention further relates to a plant for pre-treating biomasses (100) capable of implementing the above-described method, comprising a shredding station (140) for shredding biomasses, and, upstream of said shredding station, a station for removing foreign bodies (130) from said biomasses and, downstream or upstream of the shredding station (140), a soaking station (150) for soaking biomasses.

IPC Classes  ?

• D21B 1/02 - Pretreatment of the raw materials by physical or chemical means
• D21B 1/06 - Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres by dry methods
• D21B 1/12 - Fibrous raw materials or their mechanical treatment by dividing raw materials into small particles, e.g. fibres by wet methods by the use of steam

Abstract

The present invention refers to an impeller (1) for a ventilation unit (10), especially for use in plants for the aerobic treatment of organic waste. According to the invention, said impeller (1) comprises means (9a) adapted to create an under-pressure zone in the central region of the impeller itself, at its hub (5). Thanks to this measure, condensate water deriving from the humidity of the air sucked/blown by the ventilation unit (10) is prevented from leaking along the rotation shaft (24) of the impeller (1), towards its motor and towards the outside environment.

IPC Classes  ?

• F04D 29/16 - Sealings between pressure and suction sides
• F04D 29/28 - Rotors specially adapted for elastic fluids for centrifugal or helico-centrifugal pumps

Abstract

The present invention refers to a ventilation unit (1) arranged to effect flow reversal, according to two opposite directions, of a gas flow generated by a fan without reversing the rotation direction of the fan. The ventilation unit (1) includes a fan (5), at least a first piping arrangement (15) through which a gas flow is intended to pass in one of the two possible directions depending on whether it is blown or sucked by said fan, and a switching assembly (9) arranged between said fan (5) and said first piping arrangement (15), at least a switching device (19, 21) being provided in said switching assembly (9) and being movable between two positions for selectively and alternately connecting said first piping arrangement (15) to the delivery duct (7b) and to the suction duct (7a) of said fan, so as to allow the passage of a gas flow in a direction or in the opposite direction within said first piping arrangement.

IPC Classes  ?

• F04D 25/10 - Units comprising pumps and their driving means the working fluid being air, e.g. for ventilation the unit having provisions for automatically changing the direction of output air
• F04D 27/02 - Surge control
• C05F 17/02 - Apparatus therefor
• F24F 7/00 - Ventilation