GB2559099A - Modular system - Google Patents
Modular system Download PDFInfo
- Publication number
- GB2559099A GB2559099A GB1614638.3A GB201614638A GB2559099A GB 2559099 A GB2559099 A GB 2559099A GB 201614638 A GB201614638 A GB 201614638A GB 2559099 A GB2559099 A GB 2559099A
- Authority
- GB
- United Kingdom
- Prior art keywords
- digester
- vessel
- module according
- digester module
- frame
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
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- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12M—APPARATUS FOR ENZYMOLOGY OR MICROBIOLOGY; APPARATUS FOR CULTURING MICROORGANISMS FOR PRODUCING BIOMASS, FOR GROWING CELLS OR FOR OBTAINING FERMENTATION OR METABOLIC PRODUCTS, i.e. BIOREACTORS OR FERMENTERS
- C12M23/00—Constructional details, e.g. recesses, hinges
- C12M23/44—Multiple separable units; Modules
-
- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12M—APPARATUS FOR ENZYMOLOGY OR MICROBIOLOGY; APPARATUS FOR CULTURING MICROORGANISMS FOR PRODUCING BIOMASS, FOR GROWING CELLS OR FOR OBTAINING FERMENTATION OR METABOLIC PRODUCTS, i.e. BIOREACTORS OR FERMENTERS
- C12M21/00—Bioreactors or fermenters specially adapted for specific uses
- C12M21/04—Bioreactors or fermenters specially adapted for specific uses for producing gas, e.g. biogas
-
- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12M—APPARATUS FOR ENZYMOLOGY OR MICROBIOLOGY; APPARATUS FOR CULTURING MICROORGANISMS FOR PRODUCING BIOMASS, FOR GROWING CELLS OR FOR OBTAINING FERMENTATION OR METABOLIC PRODUCTS, i.e. BIOREACTORS OR FERMENTERS
- C12M23/00—Constructional details, e.g. recesses, hinges
- C12M23/34—Internal compartments or partitions
-
- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12M—APPARATUS FOR ENZYMOLOGY OR MICROBIOLOGY; APPARATUS FOR CULTURING MICROORGANISMS FOR PRODUCING BIOMASS, FOR GROWING CELLS OR FOR OBTAINING FERMENTATION OR METABOLIC PRODUCTS, i.e. BIOREACTORS OR FERMENTERS
- C12M23/00—Constructional details, e.g. recesses, hinges
- C12M23/48—Holding appliances; Racks; Supports
-
- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12M—APPARATUS FOR ENZYMOLOGY OR MICROBIOLOGY; APPARATUS FOR CULTURING MICROORGANISMS FOR PRODUCING BIOMASS, FOR GROWING CELLS OR FOR OBTAINING FERMENTATION OR METABOLIC PRODUCTS, i.e. BIOREACTORS OR FERMENTERS
- C12M23/00—Constructional details, e.g. recesses, hinges
- C12M23/58—Reaction vessels connected in series or in parallel
-
- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12M—APPARATUS FOR ENZYMOLOGY OR MICROBIOLOGY; APPARATUS FOR CULTURING MICROORGANISMS FOR PRODUCING BIOMASS, FOR GROWING CELLS OR FOR OBTAINING FERMENTATION OR METABOLIC PRODUCTS, i.e. BIOREACTORS OR FERMENTERS
- C12M27/00—Means for mixing, agitating or circulating fluids in the vessel
- C12M27/18—Flow directing inserts
- C12M27/20—Baffles; Ribs; Ribbons; Auger vanes
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E50/00—Technologies for the production of fuel of non-fossil origin
- Y02E50/30—Fuel from waste, e.g. synthetic alcohol or diesel
Landscapes
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Wood Science & Technology (AREA)
- Organic Chemistry (AREA)
- Bioinformatics & Cheminformatics (AREA)
- Zoology (AREA)
- Genetics & Genomics (AREA)
- Sustainable Development (AREA)
- Microbiology (AREA)
- Biotechnology (AREA)
- Biochemistry (AREA)
- General Engineering & Computer Science (AREA)
- General Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Clinical Laboratory Science (AREA)
- Molecular Biology (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
A digester module comprising a vessel for carrying out anaerobic digestion and a frame (figure 3) for storing and holding the vessel, characterised in that the vessel and frame are adapted to be connectable to other modules to achieve different processing capabilities. The vessel may be a 2 metre diameter HDPE tube such as is used in large scale sewage pipes, with an end cap 8 for connection to other modules comprising a weir 10 provided at the outlet (figure 4). A method of using the digester module and a system comprising a plurality of such digesters in a modular format is also described.
Description
(54) Title of the Invention: Modular system
Abstract Title: Modular anaerobic digester provided in a frame (57) A digester module comprising a vessel for carrying out anaerobic digestion and a frame (figure 3) for storing and holding the vessel, characterised in that the vessel and frame are adapted to be connectable to other modules to achieve different processing capabilities. The vessel may be a 2 metre diameter HDPE tube such as is used in large scale sewage pipes, with an end cap 8 for connection to other modules comprising a weir 10 provided at the outlet (figure 4). A method of using the digester module and a system comprising a plurality of such digesters in a modular format is also described.
At least one drawing originally filed was informal and the print reproduced here is taken from a later filed formal copy.
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Modular System
Anaerobic digestion occurs during the breakdown of organic material by micro-organisms in the absence of oxygen. The process of anaerobic digestion starts when plant and animal materials (i.e. biomass) are placed inside a sealed vessel or digester. Naturally occurring micro-organisms digest the biomass which releases a methane-rich gas which can be used to produce renewable energy, for example, in the form of electricity and heat. As a by-product, a nutrient rich fertiliser and ethanol may also be formed. Anaerobic digestion occurs over a number of stages, such as hydrolysis, acidogenesis, acetogenesis and methanogenesis.
Modem anaerobic digestion systems are typically large systems capable of holding hundreds of thousands, even millions of litres of fluid and as such require a large footprint and a dedicated site to accommodate them. Due to this constraint, material for processing often has to be transported over vast distances from multiple sites and feedstock constituents may vary on a day to day basis. The location requirements of these large scale installations can also prohibit full utilisation of the power generated in the form of heat (typically 60% of the total energy used) due to the distance from the point of use. The present invention seeks to address this problem.
The present invention relates to a digester module comprising a vessel for carrying out anaerobic digestion and a frame for storing and holding the vessel, characterised in that the vessel and frame are adapted to be connectable to other modules to achieve different processing capabilities. Advantageously, the modular system increases the efficiency of anaerobic digestion by providing a plurality of independent digesters.
Advantageously, the modular system of the present invention provides for on-site waste removal and power generation at the point of waste production and/ or power consumption. Advantageously, the modular system reduces transport costs and vehicle movements as well as making the most of power generated from the waste product. Typically, the modular system of the present invention is a small or medium scale system which reduces the amount of space required to accommodate the system. The modular system allows for interchangability of the individual components, allowing the system to be versatile. Typically, the modular system of the invention operates through a low pressure pump system.
The invention will be described by way of example, with reference to the following drawings, wherein:
Figure 1 is a perspective view of a vessel in accordance with the present invention;
Figure 2 is a longitudinal schematic view of a vessel in accordance with the present invention;
Figure 3 (a) is a schematic perspective view of a frame in accordance with the present invention;
Figure 3 (b) is a schematic side view of a frame in accordance with the present invention;
Figure 3 (c) is an schematic top view of a frame in accordance with the present invention;
Figure 3 (d) is a schematic end view of a frame in accordance with the present invention;
Figure 4 is a perspective view of a weir that may be used in one embodiment of the invention;
Figure 5 (a) is a schematic view of a weir that may be used in one embodiment of the invention;
Figure 5 (b) is a schematic cross-sectional view through the axis A-A of a weir as shown in Figure 5 (a) that may be used in one embodiment of the invention;
Figure 5 (c) is a schematic view of another embodiment of a weir that may be used in accordance with an embodiment of the invention;
Figure 5 (d) is a schematic cross-sectional view through the axis B-B of a weir as shown in Figure 5 (c) that may be used in accordance with an embodiment of the invention;
Figure 6 (a) and (c) show schematic representations of the weir that may be used in accordance with an embodiment of the invention;
Figure 6 (b) shows a schematic representation showing part of the weir that may be used in accordance with an embodiment of the invention;
Figure 6 (d) and (e) show perspective views of a weir that may be used in accordance with an embodiment of the invention;
Figure 7 (a), (b) and (c) show further schematic views of a weir that may be used in accordance with the invention;
Figure 8 is a schematic view of a vessel comprising a nozzle in accordance with an embodiment of the invention;
Figure 9 (a) shows a plan view of a vessel that may be used in the present invention, showing the positions of the nozzles with respect to the vessel;
Figure 9 (b) shows a side view of a vessel that may be used in the present invention;
Figure 10 (a) to (e) shows schematic views of nozzles that may be used in accordance with the present invention;
Figure 11 (a) shows a schematic side view of a nozzle (without a nozzle tip) that may be used in accordance with the invention;
Figure 11 (b) shows a schematic end view of a nozzle that may be used in accordance with the invention; and
Figure 11 (c) shows a schematic perspective view of a nozzle (without a nozzle tip) that may be used in accordance with the invention.
With reference to Figures 1 to 3, there is provided digester module (2) comprising a vessel (4) for carrying out anaerobic digestion and a frame (6) for storing and holding the vessel, characterised in that the vessel (4) and frame (6) are adapted to be connectable to other modules to achieve different processing capabilities. Advantageously, the modular system increases the efficiency of anaerobic digestion by providing a plurality of independent digesters in which the various stages of digestion occur.
Advantageously, the digester module (2) may also be used for pre and post treatment stages, for example, prior to and following digestion. Alternatively, the digester module (2) may allow for anaerobic digestion to occur without the requirement for a pre treatment stage.
In the embodiment shown in Figures 1 and 2, the vessel (4) has a cylindrical shape. The vessel (4) preferably comprises a double skinned, blow moulded plastics material. Preferably, the vessel (4) is constructed from an extruded square section of high density polyethylene (HDPE) which is helically wound and welded to form a two metre inner diameter (ID) tube (16). The vessel (4) of the present invention is typically formed by the same or a similar method to that currently used in the manufacture of large scale underground sewage pipe and storm drains capable of moving large volumes of liquid. The tube (16) is capped off at each end by a plate (8) to form the cylindrical vessel. Ports (18) for process connections are then added by boring the required size holes and welding pre-formed HDPE stubs in the required locations. A 750 mm manway is also added using the same method to allow for periodic inspection and internal cleaning.
Figure 3 shows a frame (6) which is used to house and support the vessel (4). The combination of the frame (6) and the vessel (4) produces the digester module (2). Typically, the frame (6) has a cubic or rectangular shape and is constructed from a material that will allow another digester module (2) to be stacked thereon. Typically, the frame (6) comprises a material that is capable of supporting four separate digester modules (2), each module being stacked upon another module. In the present embodiment, the frame (6) comprises galvanised steel. The frame (6) is a multi-part, bolt together design which may be easily transported in its component parts. Typically, the vessel (4) is provided such that it lies in a horizontal position with respect to the longitudinal axis of the frame (6) and is typically held in place by supports (12) attached to the frame (6). With reference to Figure 3 (a), the supports (12) are shaped to correspond to the cylindrical shape of the vessel (4), therefore securing the vessel when positioned within the frame. The frame also comprises a plurality of bars (22) along each side of the frame, to provide additional strength to the frame such that it can support another module when stacked thereon. In one embodiment, a recess may be provided at each of the corners of the frame (6), which recess may correspond to the shape of base of a digester module to be stacked thereon, thus providing an additional securing means. Advantageously, the vessel (4) may be easily removed from the frame (6) such that the system allows for interchangability of the digester modules (2).
Thus, the digester module (2) of the invention allows for a plurality of independent digester modules (2) to be stacked upon one another. The use of a plurality of independent modules allows for a reduction of the pressure used in the system in comparison with pressures used in conventional anaerobic digestion systems. Typically, the modular system of the invention operates through a low pressure pump system. The digester modules (2) of the present invention advantageously provide for an improved flexibility of approach, allowing the system to be tailored to the required use. The modular system of the invention may advantageously be used on an industrial scale. The digester module will have the same dimensions as a 40 foot high cube container to allow for ease of transportation and deployment. The digester modules are advantageously capable of deployment outside such that they are designed for wind loadings. The digester modules of the present invention have a working lifetime exceeding 20 years.
With reference to Figures 1 and 2, an HDPE weir (10) is welded internally around the process fluid outlet port. This weir (also known as an ullage weir) is welded together from four precut pieces of HDPE sheet in-situ. The purpose of this weir is two-fold. Firstly, the weir maximises contact between bacteria in the liquid and process gases during transfer cycles as the liquor flows over the top of the weir in a thin film. Secondly, the weir only allows the more digested, lighter material which rises to the top to pass on to the next stage of the process. The weir also acts as its own syphon break which is a requirement due to the position of the outlet and the nature of the gravity feed transfer. In addition, the position of the weir dictates the amount of ullage in the vessel. For example, a distance of 440mm between the top of the weir and the top of the vessel results in a process liquid capacity of 30m3 with 5m3 ullage.
Figure 4 shows a perspective view of a weir (10) that may be used in accordance with the invention. Figure 5 (a) and (c) show a schematic view of alternative weirs that may be used in accordance with the invention. The weir typically comprises a circular plate (24) with a fin (26) provided at an angle to the plate. Figure 5 (b) shows a cross sectional view through the axis A-A from Figure 5 (a), and Figure 5 (d) shows a cross sectional view through the axis B-B from Figure 5 (c). Figure 6 (a) to (e) and Figure 7 (a) to (c) show further views of alternative weirs that may be used in accordance with the invention.
Figures 1 and 8 show the position at which a nozzle (14) may be used with the vessel (4) of the present invention. With reference to Figure 1, the nozzle (14) is provided at one end of the vessel, within the at least one plate and also at three positions along the length of the wall (26) of the vessel. As shown in Figure 8, in an alternative embodiment, a single nozzle may be provided at a position approximately one third along the length of the wall (26) of the vessel. The nozzle (14) is provided such that it extends into the interior of the vessel (4). In a preferred embodiment as shown in Figure 9, the modular system of the invention comprises a three nozzle hydraulic arrangement, wherein one nozzle (14) is provided on at least one plate at the end of the vessel, and the further nozzles (14) are provided at a position approximately one third and two thirds along the length of the wall of the vessel. It is preferred that the at least one nozzle (14) is provided at an angle with respect to the outer wall or plate of the vessel. Preferably, the nozzle (14) projects into the vessel at an angle of around 45 degrees with respect to the wall (26) or plate (8) of the vessel, wherein the tip (28) of the nozzle is extends downwards at an angle of approximately 15 degrees. Thus, the nozzle (14) may be provided at different angles and different orientations with respect to the vessel. Some configurations of nozzle (14) that may be used in accordance with the invention are shown in Figure 10 (a) to (e) and 11 (a) to (c). The nozzle may be attached to a wall (26) or plate (8) of the vessel by means of bolts (18).
All nozzles, valves and associated pipework used in accordance with the invention are accessible for safety checks and maintenance.
In one embodiment, the anaerobic digester comprises a vessel (4) having a cylindrical structure which may be approximately 11.235 metres in length and 2.0 metres in diameter. The cylinder (4) is arranged horizontally within a frame (6). The total volume of the cylinder is approximately 35.3 m and the maximum liquid content is 30 m , equivalent to a liquid surface which is approximately 1600 mm above the base of the cylinder. The digester typically comprises food waste but may also comprise a variety of sludge sources. The digester typically comprises approximately 3 % dry solids, has a viscosity of approximately 100 cP and a density of approximately 1100 kg/m3 at 40°C.
Ί
Gas and/ or liquid may be introduced into the vessel via the nozzles (14). Gas (for the purpose of mixing) is typically introduced via a single sparge pipe with multiple nozzles, each nozzle having a diameter of approximately 2.4 mm and being spaced such that they are 100 mm apart. The nozzles may be provided such that they are positioned at an angle of 45 degrees to the wall of the vessel, with the end of the nozzle extending downwards at an angle of 15 degrees.
Liquid mixing typically occurs via jet nozzles, wherein one, three or four nozzles are typically used. An extraction point is typically provided at the front end of the vessel. The mixing phase within the vessel typically takes around ten minutes. During gas mixing, the a
sparge pipe is operated constantly at 45 m /hour.
It is preferred that nozzles are located at positions one third and two thirds along the length of the wall of the vessel and that the nozzles are provided at an angle of 45 degrees with respect to the wall of the cylinder, with the tip of the nozzle being extending vertically downwards at an angle of 15 degrees. This orientation of nozzles was an attempt to reduce any potential streaming at the surface for the higher nozzle (which could induce foaming) and encourage increased mixing closer to the base of the digester. The three hydraulic nozzles operated in a
sequence at a flow rate of 54 m per hour, per nozzle each for 50 seconds, the hydraulic mixing phase ensured that the entire floor received effective scouring from the nozzles which would resuspend grit and other material accumulated at the base of the anaerobic digester.
In use, once the capacity of the desired digestion system has been determined, one or more modules as described above can be selected. Where more than one module is required, the modules can be connected in series via the inlet and outlet ports. By virtue of the stackability, the overall footprint of the system can be maintained as low as possible. As and when processing capacities vary, modules can be added or taken away or simply temporarily decommissioned.
Claims (29)
- CLAIMS:1. A digester module comprising a vessel for carrying out anaerobic digestion and a frame for storing and holding the vessel, characterised in that the vessel and frame are adapted to be connectable to other modules to achieve different processing capabilities.
- 2. A digester module according to claim 1, wherein tire vessel has a cylindrical shape.
- 3, A digester module according to any one of claim 1 or claim 2, wherein the vessel comprises a double skinned blow moulded plastics material.
- 4, A digester module according to claim 3 wherein the polyethylene3SIS density30 08 17
- 5, A digester module according to any one of claim 3 or claim 4, wherein the plastics 15 material is helically wound and welded to form a tube with a two metre inner diameter that forms a wall of the digester module.
- 6, A digester module according to claim 5 wherein the tube comprises at least one end plate to cap the tube at at least one end of the vessel,
- 7, A digester module according to any one of the preceding claims, wherein the vessel further comprises a manway.A digester module according to any one of the preceding claims, wherein the frame or
- 9. A digester module according to any one of the preceding claims, wherein the frame comprises a material that is capable of supporting further separate digester modules, each module being stackable upon another module.
- 10. A digester module according to any one of the precoding claims, wherein the frame comprises galvanised steel.
- 11. A digester module according to any one of the preceding claims, wherein the vessel is provided such that it lies in a horizontal position with respect to the longitudinal axis of the frame.10
- 12. A digester module according to any one of the preceding claims, wherein the frame comprises a recess in the corner of the frame corresponding to tire shape of a base of die digester module.30 08 17
- 13. A digester module according to any one of the preceding claims, comprising a fluid 15 inlet and,/ or outlet, port.
- 14. A digester module according to any one of the preceding claims, comprising a weir.
- 15. A digester module according to any one of the preceding claims, wherein the weir 20 comprises high density polyethylene (HOPE),
- 16, A digester module according to any one of claim 14 or claim 15, wherein the weir is welded around the fluid outlet port.25
- 17. A digester module according to any one of claims 14 to 16, wherein the weir comprises a circular plate and/ or a fin, wherein the fin is provided at an angle to the circular plate.
- 18. A digester module according to any one of the preceding claims, comprising at least one nozzle.
- 19. A digester module according to claim 18, wherein the at least one nozzle is provided at an angle with respect to the outer wall or plate of the vessel.
- 20. A digester module according to any one of claim 18 or claim 19, wherein the fluid 5 delivery nozzle projects into die vessel at an angle of abont 45 degrees.
- 21. A digester module according to any one of claims 18 to 20, wherein the tip of the nozzle extends downwards at an angle of approximately 15 degrees.10
- 22, A. digester module according to any one of claims 18 io 21, wherein the fluid deli very nozzle is attached to the wall of the vessel.30 08 17
- 23, A digester module according to any one of claims 18 to 22, wherein the fluid delivery nozzle is attached to the at least one end plate of tire vessel.
- 24, A digester module according to any one of the preceding claims, comprising a low pressure pump system,
- 25, A modular system comprising a plurality of digester module vessels for carrying out 20 anaerobic digestion and a digester module support frame for storing and holding the plurality of digester module vessels such that the system increases the efficiency of anaerobic digestion by providing a plurality of independent digester modules,
- 26. A modular system according to claim 24, wherein the plurality of digester modules 25 are connected in. series.
- 27, A modular system according to any one of claim 25 or claim 26, comprising a low pressure pump system.30
- 28. A method of using the digester module according to claims 1 to 23 comprising the steps of providing a vessel, introducing a gas and/or liquid into the vessel and allowing anaerobic digestion to take place.
- 29. A method according to claim 275 further comprising the use of a plurality of digester modules.
- 30 08 17IntellectualPropertyOfficeApplication No: GB1614638.3 Examiner: J.P. Bellia
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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GB1614638.3A GB2559099A (en) | 2016-08-30 | 2016-08-30 | Modular system |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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GB1614638.3A GB2559099A (en) | 2016-08-30 | 2016-08-30 | Modular system |
Publications (2)
Publication Number | Publication Date |
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GB201614638D0 GB201614638D0 (en) | 2016-10-12 |
GB2559099A true GB2559099A (en) | 2018-08-01 |
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ID=57119775
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GB1614638.3A Withdrawn GB2559099A (en) | 2016-08-30 | 2016-08-30 | Modular system |
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Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19958142A1 (en) * | 1999-08-19 | 2001-02-22 | Schmack Biogas Gmbh | Transportable, modular biogas production plant, consists of separate fermenter and energy supply units which are mounted in standard freight containers or container frames |
DE202010000437U1 (en) * | 2010-03-22 | 2010-06-02 | Haider, Pierre | Transportable, modular biogas plant |
CA2731834A1 (en) * | 2011-02-16 | 2012-08-16 | Zero Waste Energy Systems Inc. | Stacked digester tanks for horizontal anaerobic digester |
WO2013039407A1 (en) * | 2011-09-16 | 2013-03-21 | Green Gas As | Modular anaerobic digestion system |
CN104944574A (en) * | 2015-05-22 | 2015-09-30 | 深圳市清研环境科技有限公司 | Vertical multi-zone self-airlift circular current anaerobic bioreactor and application method thereof |
-
2016
- 2016-08-30 GB GB1614638.3A patent/GB2559099A/en not_active Withdrawn
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19958142A1 (en) * | 1999-08-19 | 2001-02-22 | Schmack Biogas Gmbh | Transportable, modular biogas production plant, consists of separate fermenter and energy supply units which are mounted in standard freight containers or container frames |
DE202010000437U1 (en) * | 2010-03-22 | 2010-06-02 | Haider, Pierre | Transportable, modular biogas plant |
CA2731834A1 (en) * | 2011-02-16 | 2012-08-16 | Zero Waste Energy Systems Inc. | Stacked digester tanks for horizontal anaerobic digester |
WO2013039407A1 (en) * | 2011-09-16 | 2013-03-21 | Green Gas As | Modular anaerobic digestion system |
CN104944574A (en) * | 2015-05-22 | 2015-09-30 | 深圳市清研环境科技有限公司 | Vertical multi-zone self-airlift circular current anaerobic bioreactor and application method thereof |
Also Published As
Publication number | Publication date |
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GB201614638D0 (en) | 2016-10-12 |
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