EP4304995A1 - Digesteur a volume de ciel gazeux reduit - Google Patents
Digesteur a volume de ciel gazeux reduitInfo
- Publication number
- EP4304995A1 EP4304995A1 EP22710110.2A EP22710110A EP4304995A1 EP 4304995 A1 EP4304995 A1 EP 4304995A1 EP 22710110 A EP22710110 A EP 22710110A EP 4304995 A1 EP4304995 A1 EP 4304995A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- digestate
- volume
- enclosure
- digester
- tank
- 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.)
- Pending
Links
- 239000000463 material Substances 0.000 claims abstract description 75
- 239000010802 sludge Substances 0.000 claims abstract description 30
- 238000007667 floating Methods 0.000 claims abstract description 25
- 239000000203 mixture Substances 0.000 claims abstract description 20
- 230000005484 gravity Effects 0.000 claims abstract description 10
- 238000012546 transfer Methods 0.000 claims abstract description 10
- 230000002211 methanization Effects 0.000 claims abstract description 9
- 238000004891 communication Methods 0.000 claims abstract description 4
- 239000006260 foam Substances 0.000 claims description 103
- 238000002347 injection Methods 0.000 claims description 35
- 239000007924 injection Substances 0.000 claims description 35
- 238000002156 mixing Methods 0.000 claims description 27
- 239000012530 fluid Substances 0.000 claims description 7
- 239000002184 metal Substances 0.000 claims description 3
- 238000013519 translation Methods 0.000 claims description 3
- 238000005187 foaming Methods 0.000 abstract description 11
- 238000007599 discharging Methods 0.000 abstract description 3
- 238000004880 explosion Methods 0.000 description 17
- 230000000694 effects Effects 0.000 description 16
- 239000007789 gas Substances 0.000 description 13
- 230000029087 digestion Effects 0.000 description 9
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 9
- 239000000243 solution Substances 0.000 description 7
- 238000004519 manufacturing process Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 239000002360 explosive Substances 0.000 description 5
- 239000005416 organic matter Substances 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 238000009825 accumulation Methods 0.000 description 4
- 239000003795 chemical substances by application Substances 0.000 description 4
- 239000007788 liquid Substances 0.000 description 4
- 238000004364 calculation method Methods 0.000 description 3
- 238000006073 displacement reaction Methods 0.000 description 3
- 239000012071 phase Substances 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000005086 pumping Methods 0.000 description 3
- 230000009467 reduction Effects 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 230000003213 activating effect Effects 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 230000009172 bursting Effects 0.000 description 2
- 229910002092 carbon dioxide Inorganic materials 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 239000007792 gaseous phase Substances 0.000 description 2
- 230000001965 increasing effect Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 239000010815 organic waste Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 230000002441 reversible effect Effects 0.000 description 2
- 239000004094 surface-active agent Substances 0.000 description 2
- 238000004065 wastewater treatment Methods 0.000 description 2
- 241000894006 Bacteria Species 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229920000832 Cutin Polymers 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 239000012620 biological material Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 150000001720 carbohydrates Chemical class 0.000 description 1
- 235000014633 carbohydrates Nutrition 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 229920002678 cellulose Polymers 0.000 description 1
- 239000001913 cellulose Substances 0.000 description 1
- 238000009264 composting Methods 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000005474 detonation Methods 0.000 description 1
- 230000001627 detrimental effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 239000003651 drinking water Substances 0.000 description 1
- 235000020188 drinking water Nutrition 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000008246 gaseous mixture Substances 0.000 description 1
- 239000004519 grease Substances 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 230000000977 initiatory effect Effects 0.000 description 1
- 229920005610 lignin Polymers 0.000 description 1
- 150000002632 lipids Chemical class 0.000 description 1
- 230000035800 maturation Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 244000005700 microbiome Species 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 150000002894 organic compounds Chemical class 0.000 description 1
- 239000011368 organic material Substances 0.000 description 1
- 230000003449 preventive effect Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 102000004169 proteins and genes Human genes 0.000 description 1
- 108090000623 proteins and genes Proteins 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000000306 recurrent effect Effects 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000010008 shearing Methods 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000002459 sustained effect Effects 0.000 description 1
- 235000018553 tannin Nutrition 0.000 description 1
- 229920001864 tannin Polymers 0.000 description 1
- 239000001648 tannin Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/02—Biological treatment
- C02F11/04—Anaerobic treatment; Production of methane by such processes
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/02—Aerobic processes
- C02F3/08—Aerobic processes using moving contact bodies
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/28—Anaerobic digestion processes
- C02F3/2866—Particular arrangements for anaerobic reactors
-
- 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
- C12M1/00—Apparatus for enzymology or microbiology
- C12M1/107—Apparatus for enzymology or microbiology with means for collecting fermentation gases, e.g. methane
-
- 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
- C12M29/00—Means for introduction, extraction or recirculation of materials, e.g. pumps
- C12M29/18—External loop; Means for reintroduction of fermented biomass or liquid percolate
-
- 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
- C12M41/00—Means for regulation, monitoring, measurement or control, e.g. flow regulation
- C12M41/02—Means for regulation, monitoring, measurement or control, e.g. flow regulation of foam
-
- 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
- C12M41/00—Means for regulation, monitoring, measurement or control, e.g. flow regulation
- C12M41/44—Means for regulation, monitoring, measurement or control, e.g. flow regulation of volume or liquid level
-
- 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
- C12M47/00—Means for after-treatment of the produced biomass or of the fermentation or metabolic products, e.g. storage of biomass
- C12M47/18—Gas cleaning, e.g. scrubbers; Separation of different gases
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2301/00—General aspects of water treatment
- C02F2301/04—Flow arrangements
- C02F2301/046—Recirculation with an external loop
-
- 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
Definitions
- the invention lies in the technical field of the biological treatment of sludge, in particular from waste water.
- the invention relates to a digester intended for the implementation of a sludge methanization treatment.
- Anaerobic digestion is a technology based on the degradation by microorganisms of organic matter, under controlled conditions and in the absence of oxygen, therefore in an anaerobic environment. Also known as anaerobic digestion.
- digestate which is a wet product, rich in partially stabilized organic matter. It is generally envisaged to return the digestate to the soil after possibly a maturation phase by composting;
- Biogas a gaseous mixture generally saturated with water at the outlet of the digester and typically composed of approximately 50% to 70% methane (CH4), 30% to 50% carbon dioxide (C02) and some trace gases ( NH3, N2, H2S).
- CH4 methane
- C02 carbon dioxide
- NH3, N2, H2S trace gases
- the methanation is carried out in a digester.
- the digester can be seen as an enclosure closed by an upper wall (also called a roof), defining two volumes: a first volume containing the material to be treated, the sludge, the digestate generated; and a second volume between the first volume and the upper wall, also called the gas sky, and towards which the generated biogas rises.
- sludge should be understood as being any organic material, including organic waste and all kinds of sludge, including primary sludge, biological sludge, activated sludge, and more particularly organic waste sludge. or drinking water or waste water treatment plants.
- Organic matter, or natural organic matter refers to the large source of carbon-based compounds found in natural and man-made, terrestrial and aquatic environments. It is matter composed of organic compounds from the remains of organisms such as plants and living things and their waste products in the environment. organic molecules can also be made by chemical reactions that do not involve life. The basic structures are created from cellulose, tannin, cutin and lignin, along with other proteins, lipids and carbohydrates.
- Air overpressure is the consequence of an explosion which is manifested by the propagation from the zone of the explosion, of a pressure wave in the atmosphere, at a speed of the order of that of acoustic waves. (340 m/s in air at 15°C). When the characteristics of such a wave are measured at a fixed point in space, a positive pressure pulse (overpressure) is observed - the duration of which is generally measured in milliseconds - followed by a depression phase. [0009] If the explosion originates from the detonation of an explosive substance, the positive overpressure is characterized by a very sudden, almost instantaneous rise to the maximum pressure, followed by an almost linear decrease. The negative pressure peak is much less important and is generally not considered in evaluating the effects of a pressure wave.
- Pressure is a force per unit area capable of inducing bending or shearing forces in structures, possibly compression for the human body.
- a pressure wave can also propel projectiles.
- E - 7 yr — 1 [0013] With DR: Pr-PO; Pr: Bursting pressure of the containment (Pa); PO: Atmospheric pressure (Pa); V: Volume of gas overhead (m3); yr: Ratio of the specific heats of the gas contained in the reservoir (1.4 for methane); E: Explosive energy (J).
- the explosive volume i.e. the volume of the gaseous sky in normal operation or of the empty digester during accidental emptying.
- the gaseous headspace is generally quite voluminous, and the distance between the level of digestate and the upper wall of the digester can reach up to 3 m.
- the purpose of such a height is first of all to allow the accumulation of floating products and to manage any foaming caused either by the presence of filamentous bacteria in the wastewater treatment process producing sludge (sludge expansion, " bulking” in English), or by the production of surface-active compounds in the digester.
- sludge sludge expansion, " bulking” in English
- RVE Rapid Volume Expansion
- digesters In summary, the usual design of digesters consists in leaving a significant height between the level of digestate and the upper wall of the digester, so as to be able to store the foams and floats on the surface of the digestate and to allow a possible RVE phenomenon. If this height is insufficient, the integrity of the structure - more particularly that of the upper wall - is endangered. This volume available for foam expansion is usually occupied by biogas and generates the safety constraints mentioned above.
- a second solution consists in extracting the foams and floats from the digestate via a submerged orifice close to the surface.
- the extraction in this case is generally “passive”. This makes it possible to simply contain the biogas in the digester, but poses safety problems in the event of an uncontrolled drop in the liquid level. Indeed, in this case, biogas can escape. In addition, this solution actually has low effectiveness in entraining foams/floats.
- Another solution may consist in managing the consequences of foaming without trying to evacuate the foams/floating agents. Thus, when foaming takes place and is detected, digestate is extracted - for example by "active" pumping - so as to partially empty the digester to prevent the foam from putting pressure on the roof of the digester.
- the pumped digestate is discharged into an external tank provided for this purpose. If such a device makes it possible to meet safety requirements by artificially increasing the height of the gas headspace, it has the disadvantage of at least partially emptying the contents of the digester.
- the reaction volume is then reduced, with negative impacts on the performance of the digester. If we can hope for a return to “normal” in the event of reversible foaming, this solution does not make it possible to wait for a return to normal in the event of an accumulation of floating agents with recurrent or even permanent foaming. In the latter cases, a "sustained" operation of the digester is then obtained with an increased gas phase volume that is detrimental to the safety objective with respect to the risks of explosion, associated with a reduction in the effective volume of the digester, its processing capacity.
- Document WO 2009/118320 proposes a digester aimed at reducing the effect distances of the explosion by minimizing the explosive volume using a space provided to let the biogas escape from the sludge. without causing light foams of the surfactant type, while allowing the accumulation of a certain volume of floating agents (excluding light foams) and managing the RVE.
- the digester includes an inverted bell which recovers the biogas produced and a device allowing access to the agitator in order to be able to extract it without requiring emptying of the digester.
- the injection of water (industrial) is implemented to reduce any foam formed in the digester and cool the biogas.
- this digester has several drawbacks.
- Document US 4530762 describes a digester comprising a device for evacuating foams/floats from the digestate. Any content reaching the first tank within the enclosure of this digester appears to be transferred to the first zone of the tank.
- the tanks are intended to recover the treated effluent and are placed on a bed of tubular settling tanks.
- the second tank is a gas separator.
- a wall should be positioned with its upper end in horizontal alignment with the edges of the tanks. By raising the wall, this allows the foam to be expelled in the tanks. Then the foams are collected in the tank and blown out of the tank when necessary.
- the wall In other words, to envisage the evacuation of the foams, the wall must be in a high position compared to the nominal position, and therefore at a higher altitude than the edges of the tanks. In addition, in this digester, it is impossible to collect the foams with a first submerged tank.
- the first lower zone contains the digestate
- the second middle zone consists of a steel structural support to accommodate a filter medium forming a surface for attaching to a biological deposit.
- This zone is a solid/liquid/gas separation zone
- the upper third zone contains the clarified liquid fraction.
- Treated effluent is extracted from this area through a system of submerged piping and a treated effluent control system.
- this digester requires an additional foam flap system to function properly.
- the invention aims to overcome all or part of the problems mentioned above by proposing a reduced gas digester comprising a foam evacuation device operating by gravity and by a double overflow device.
- the digester comprises a device for mixing the digestate coupled to a device for injecting digestate into the gas overhead, serving both to direct the foams and floats on the surface towards the first evacuation overflow and to reduce the foams by mechanical effect.
- Such a digester makes it possible to reconcile operating safety and a reduction in the volume of the digester's gaseous headspace, which thus reduces the level of the overpressure thresholds and distances of the effects of the explosion by acting on the two adjustable parameters which are the pressure of rupture of the structure and the explosive volume (volume of the gaseous sky).
- the subject of the invention is a digester intended for the implementation of a sludge methanization treatment to generate biogas and a digestate, the digester comprising:
- an enclosure intended to contain a volume of material, the volume of material comprising the digestate, the digestate comprising on its surface foams and/or floats originating from the sludge or generated during the methanization treatment, the enclosure defining a first equal volume to the volume of material and a second volume arranged above the first volume;
- the digester being characterized in that it comprises a device for evacuating the foams and/or floats of the digestate comprising:
- first tank disposed in the enclosure and delimited by a first wall, the first tank being intended to be supplied with digestate and foams and/or floats from the volume of material by overflow above the first wall;
- a second tank connected to the atmosphere and located outside the containment, comprising: o a first zone delimited by a second wall; and o a second zone in communication with the tank;
- the first zone being intended to be supplied with digestate and foams and/or floating materials from the first tank via the conduit;
- the second zone of the second tank being intended to be supplied with digestate from the first zone of the second tank by overflow above the second wall;
- the second orifice being located at an altitude greater than or equal to that of the first orifice;
- the upper end of the first wall being located at a first height above a reference point of the first orifice and the upper end of the second wall being located at a second height above the reference point of the first orifice;
- the first height and the second height being predefined so that a first mixture of variable proportions of digestate and foams and/or floating materials in the first tank having a first average density is transferred by gravity into the first zone containing a second mixture of proportions digestate variables and second density foams and/or floats, the transfer taking place as long as the product of the first average density by the first height is greater than the product of the second average density by the second height by the first height.
- the digester according to the invention further comprises a device for mixing the volume of material disposed in the first volume, the mixing device being configured to set the volume of material in motion.
- the mixing device comprises: - One or more chimneys extending in the enclosure along a first axis, preferably on the periphery of the enclosure, each chimney having an upper end and a lower end;
- first agitators each being preferably positioned under the lower end of one of the chimneys, the first agitator(s) being configured to set in motion the volume of material in rotation around a central vertical axis, substantially parallel to the first axis and in translation along the first axis from the upper end towards the lower end of said chimney.
- the mixing device comprises one or more second stirrers, each being arranged in the enclosure, preferably in the bottom of the enclosure, and even more preferably on the periphery of the enclosure, the second stirrers being configured ) to set in motion the volume of material in rotation around a central vertical axis, substantially parallel to the first axis.
- the digester according to the invention further comprises a device for injecting digestate into the second volume, preferably placed in the center of the roof, and/or in the volume of material.
- the digestate injection device comprises:
- a first injector fixed to the roof, preferably in the center of the roof, and in fluidic connection with the second volume and configured to inject digestate into the second volume;
- a first recirculation pump configured to recirculate digestate in the first recirculation loop from the first volume to the first injector.
- the digestate injection device further comprises:
- a second injector fixed to a side wall of the enclosure at a first height and in fluid connection with the enclosure and configured to inject digestate into the enclosure at the first height;
- a second recirculation loop between a second height of the enclosure, lower than the first height and the second injector; - A second recirculation pump configured to recirculate digestate in the second recirculation loop from the second height of the enclosure and towards the second injector.
- first recirculation loop and the second recirculation loop are grouped together in one and the same recirculation loop, the first recirculation pump and the second recirculation pump forming one and the same circulation pump.
- recirculation configured to recirculate digestate to the first injector and/or to the second injector.
- the roof is made of metal.
- FIG. 1 schematically shows a digester according to the invention
- Figure 2 schematically represents a device for discharging foams and/or floating materials from a digester according to the invention
- Figure 3 schematically represents an embodiment of a digester according to the invention
- FIG. 4 schematically shows another embodiment of the digester according to the invention.
- FIG. 5 schematically shows another embodiment of the digester according to the invention.
- FIG. 6 schematically shows another embodiment of the digester according to the invention.
- FIG. 7 schematically shows another embodiment of the digester according to the invention.
- Figure 8 schematically shows a sectional view of an embodiment of the digester according to the invention.
- the invention generally applies to digesters from 50 to 16,000 m 3 , and advantageously from 500 to 7,000 m 3 .
- FIG. 1 schematically shows a digester 10 according to the invention.
- the digester 10 is intended for the implementation of a methanization treatment of sludge to generate biogas 11 and a digestate 12.
- the digester 10 comprises an enclosure 13 intended to contain a volume of material 14, the volume of material 14 comprising the digestate 12.
- the enclosure 13 preferably has a circular section.
- the digestate comprises on its surface foams and/or floats 16 originating from the sludge or being generated during the methanization treatment.
- the enclosure 13 defines a first volume 14 equal to the volume of material and a second volume 17 disposed above the first volume 14.
- the digester 10 comprises a roof 18 (or upper wall) intended to close the enclosure 13. It comprises also a tank 19 close to the enclosure 13 and intended to collect the digestate 12.
- the tank 19 is connected to the enclosure. It can be contiguous to the enclosure or close to the enclosure, so as to allow gravity transfer of the digested sludge (the digestate 12) for example by a direct fall or by an indirect fall via a slope.
- the digester 10 comprises a dome 22 arranged on a portion of the roof 18, and intended to collect the biogas 11.
- the digester 10 comprises an evacuation device 32 for the foams and/or floats 16 from the digestate 12.
- the evacuation device 32 for the foams and/or floats 16 from the digestate 12 is represented diagrammatically on the figure 1. It is presented in detail below.
- FIG. 2 schematically represents a device 32 for discharging foams and/or floats 16 from a digester according to the invention.
- the evacuation device
- the 32 of the foams and/or floats 16 of the digestate 12 comprises a first tank 33 placed in the enclosure 13 and delimited by a first wall 100, and a second tank 34 connected to the atmosphere and located outside the enclosure 13.
- the evacuation device 32 further comprises a conduit 37 connecting the first tank
- the first tank 33 is intended to be fed with digestate 12 and with foams and/or floats 16 from the volume of material 14 by overflow above the first wall 100.
- the second tank 34 comprises a first zone 35 delimited by a second wall 103, and a second zone 36 in direct or indirect communication with the tank 19.
- the first zone 35 is intended to be supplied with digestate 12 and foams and/or floats 16 from the first tank 33 via the conduit 37.
- the second zone 36 of the second tank 34 is intended to be supplied with digestate from the first zone 35 of the second tank 34 by overflow above the second wall 103.
- the second zone 36 is connected to the reservoir 19.
- the second orifice 102 is located at an altitude greater than or equal to that of the first orifice 101.
- the term altitude is to be understood as a measurement of the height along an axis along which the enclosure 13 extends.
- the conduit 37 connects the first tank 33 via a first orifice 101 to the first zone 35 of the second tank 34 via a second orifice 102.
- first orifice 101 is the interface between the first tank 33 and the duct 37
- second orifice 102 is the interface between the duct 37 and the first zone 35 of the second tank 34.
- the orifice 102 is located at a higher level or equal to that of orifice 101.
- the upper end of the first wall 100 is located at a first height h1 above a reference point 1001 of the first orifice 101.
- the upper end of the second wall 103 is located at a second height h2 above the reference point 1001 of the first orifice 101.
- the reference point 1001 of the first orifice 101 can be located at the lowest point of the first orifice 101. It can also be from the center of the first orifice 101 (as shown in FIG. 2) in the case of a circular section orifice. In other words, the two heights h1 and h2 are measured from the same altitude, that of the previously chosen reference point.
- the first height h1 and the second height h2 are predefined so that a first mixture of variable proportions of digestate and foams and/or floats in the first tank 33 having a first average density d1 is transferred by gravity in the first zone 35 containing a second mixture of variable proportions of digestate 12 and foams and/or floats 16 of second density d2, the transfer taking place as long as the product of the first average density d1 by the first height h1 is greater than the product of the second average density d2 by the second height h2 by the first height h1.
- the evacuation of the foams/floats 16 by the evacuation device 32 takes place as long as the relation d1 * h1>d2 * h2 is respected.
- the device will allow the transfer of a mixture up to a density very close to d1 (with a difference of the order of a few % with respect to d1, difference that a person skilled in the art knows how to determine taking into account all the effects mentioned).
- the evacuation device 32 can be sized based on extreme assumptions unfavorable to the flow from the tank 33 to the tank 34.
- the maximum density value d2 can be considered equal to 1.05 and corresponding to a dense digestate containing no foams and/or floats.
- the minimum density value d1 can be considered equal to 0.3 and corresponding to a mixture composed essentially of foams and/or floats.
- the evacuation device 32 of the foams/floats 16 the evacuation of foams/floats can be carried out by overflow with regular and continuous operation of the digester.
- FIG. 3 schematically represents an embodiment of a digester 200 according to the invention.
- the digester 200 shown in Figure 3 is identical to the digester 10 shown in Figure 1.
- the digester 200 further comprises a device 20 for mixing the volume of material 14 disposed in the first volume 14.
- the mixing device 20 is configured to set the volume of material 14 in motion.
- the mixing device 20 imparts a rotational movement to the volume of material 14 in such a way that the foams and/or floats 16 entrained with the digestate 12 are extracted from the volume of material 14 with the digestate 12 by overflow 100 in the first tank 33
- the mixing device 20 makes it possible to avoid the accumulation of foams and/or floats 16 at a point on the surface of the volume of material 14 remote from the first tank 33.
- the digester 200 may further comprise a device 21 for injecting digestate 12 into the second volume 17 and/or into the volume of material 14.
- the injection device 21 makes it possible to inject digestate 12 into the second volume 17 above the volume of material 14.
- the injection device 21 is preferably placed in the center of the roof 18.
- the injection of digestate 12 above the volume of material 14 is used to project the foams and/or floats 16 , tending to accumulate in the center of the surface, towards the periphery where they are driven towards the first tank 33 to be extracted from the volume of matter14.
- the entrainment of the foams and/or floats 16 towards the tank 33 is favored by the rotational movement of the volume of material 14 generated by the mixing device 20.
- the injection device 21 can also be located on the periphery of the enclosure 13.
- the injection of digestate 12 from the side wall above the volume of material 14 is carried out with a jet oriented so as to produce a rotational movement of the volume of matter around a vertical axis. This rotational movement drives the foams and/or floats towards the tank 33.
- FIG. 4 schematically represents another embodiment of a digester 210 according to the invention.
- the digester 210 comprises the injection device 21 and the mixing device 20.
- the invention also covers any digester comprising only an injection device 21 or only one mixing device 20.
- the mixing device 20 comprises one or more chimneys 23 extending in the enclosure 13 along a first axis 24, preferably on the periphery of the enclosure 13.
- Each chimney 23 has an upper end 61 and a lower end 62
- chimney is meant a hollow body extending along the first axis 24.
- the chimneys 23 can have a circular or polygonal section.
- the chimneys are half-cylinders fixed, for example by welding or riveting, to the side wall of the enclosure 13.
- the mixing device 20 comprises one or more first stirrers 25.
- Each of the first stirrers 25 is associated with one of the plurality of stacks 23. In other words, each stack 23 has its first stirrer 25.
- Each of the first stirrers is preferably positioned under the lower end 62 of its stack 23.
- the first one or more stirrers 25 are configured to move the volume of material 14 in rotation around a central vertical axis 60, substantially parallel to the first axis 24, and in translation along the first axis 24 from the upper end 61 towards the lower end 62 of said chimney 23.
- the first stirrers 25 are oriented so as to impart a rotational movement to the digestate 12 according to the movement represented by the arrow 271 and u n movement from bottom to top in the volume 14 via the reverse movement from top to bottom through the chimney 23 represented by the arrow 251.
- This movement as a combination of a horizontal rotation around the axis 60 and vertical displacement from the top of the chimney to the bottom of the enclosure.
- the flow of digestate at the suction of the agitator 25 is channeled from the surface by means of the chimney 23. This creates the vertical displacement and the orientation of the agitator 25 creates a horizontal rotation in addition to the rotation generated by the lateral injection device 21.
- the upper end 61 of the chimney(s) 23 is positioned below the surface of the material of the volume of material 14 (for example 250 mm below the highest level bottom of digestate). Thus, digestate 12 falls into the chimney(s) 23.
- the assembly formed by a chimney 23 and a first agitator 25 contributes to destratifying the volume of material 14 by producing a pumping from the bottom to the top of the volume of material 14.
- fresh sludge can be injected into the chimney 23 to promote effective mixing of the fresh sludge with the rest of the digestate.
- the fresh sludge feed rate can be of the order of 30 m3/h while the pumping rate provided by a first agitator 25 can be of the order of 2500 m3/h, i.e. a ratio of the order of 1/100.
- the mixing device 20 can also comprise one or more second stirrers 27, each being placed in the enclosure 13, preferably in the bottom of the enclosure 13, and even more preferably on the periphery of the enclosure 13.
- the second stirrers 27 are configured to set the volume of material 14 in motion in rotation around the central vertical axis 60, substantially parallel to the first axis 24.
- the second stirrers 27 are oriented so as to impart a rotational movement to the digestate 12 according to the movement represented by the arrow 271. We can qualify this rotational movement as a horizontal displacement.
- a person skilled in the art knows how to determine the appropriate characteristics (size, shape, speed of rotation, etc.) of the stirrers 25, 27 and to orient the axes 26, 28 of the stirrers 25, 27 according to the viscosity of the material to be stirred and the volume of material 14 considered.
- the horizontal movement moves the foams/floats towards the periphery of the enclosure.
- the vertical movement moves the foams/floats from the upper surface of the volume of material 14 towards the bottom of the enclosure.
- the combination of these two movements makes it possible to prevent the formation and/or stagnation of foams/floats on the surface of the volume of material and a better mixing of the contents of the enclosure is obtained.
- FIG. 5 schematically represents another embodiment of a digester 220 according to the invention.
- the digestate injection device 21 comprises a first injector 29 fixed to the roof, preferably at the center of the roof, and in fluid connection with the second volume 17 and configured to inject digestate 12 into the second volume 17
- the injection device 21 comprises a first recirculation loop 30 between the first volume 14 and the first injector 29.
- the injection device 21 comprises a first recirculation pump 31 configured to recirculate digestate 12 in the first loop recirculation 30 from the first volume 14 to the first injector 29.
- the injection of digestate into the second volume aims to reduce the foams/floats and to cause them to move towards the periphery of the enclosure.
- the dome 22 may include two safety valves 40, 41 arranged opposite one another.
- the roof 18 is generally substantially flat. If it is made of metal, it can be either concave (if the pressure applied to the roof is less than 5 mbar) or convex (if the pressure applied to the roof is greater than 5 mbar).
- FIG. 6 schematically shows another embodiment of a digester 230 according to the invention.
- the injection device digestate 21 comprises a second injector 39 fixed to a side wall of the enclosure 13 at a first height 53 and in fluid connection with the enclosure 13, and more precisely the volume of material 14, and configured to inject digestate 12 into the enclosure 13, in the volume of material 14.
- the injection device 21 comprises a second recirculation loop 50 between a second height 52 of the enclosure 13, lower than the first height 53 and the second injector 39.
- the injection device 21 comprises a second recirculation pump 51 configured to recirculate digestate 12 in the second recirculation loop 30 from the second height 52 of the enclosure 13 and towards the second injector 39.
- the device injection of the digester 130 is configured to inject digestate initially into the lower part of the enclosure towards an upper part of the volume of material.
- this injection contributes to setting the material of the enclosure in motion and to rotating the foams/floating on the surface to prevent their stagnation and to send them towards the periphery of the enclosure, towards the chimneys 23 and the tank 33
- the digestate injection device 21 comprises a second injector 49 fixed to a side wall of the enclosure 13 at a first height 54 and in fluid connection with the enclosure 13 and configured to inject digestate 12 in the enclosure 13 at the first height 54, the first height 54 being at the level of the second volume 17.
- the injection device 21 comprises a second recirculation loop 50 between a second height 52 of the enclosure 13, lower than the first height 54 and the second injector 49.
- the injection device 21 comprises a second recirculation pump 51 configured to recirculate diges tat 12 in the second recirculation loop 30 from the second height 52 of the enclosure 13 and towards the second injector 49.
- This injection of digestate 12 above the volume of material 14 forms a jet oriented with respect to the upper surface of the volume of material 14 so as to produce a rotational movement of the volume of material around the vertical axis 60. This rotational movement drives the foams and/or floats towards the tank 33.
- This embodiment may comprise a single second injector 39, 49 on the side wall of the enclosure. But it can also include several second injectors 39, 49 distributed all around the wall, with one or more recirculation loops adapted to this configuration, in connection with the second recirculation pump.
- the digester according to the invention can comprise either one of the two recirculation loops, or a double recirculation, that is to say the two recirculations described above, with the first recirculation loop and the second recirculation. In a preferred embodiment, the two recirculation loops are pooled.
- FIG. 7 schematically represents another embodiment of a digester 240 according to the invention.
- the first recirculation loop 30 and the second recirculation loop 50 are grouped together in one and the same recirculation loop, the first recirculation pump 31 and the second recirculation pump 51 forming one and the same recirculation pump configured to recirculate digestate 12, alternately or simultaneously, to the first injector 29 and/or to the second injector 39.
- the second recirculation loop can be connected to the second injector 49 fixed to the side wall of the enclosure 13 at the first height 54 and in fluidic connection with the enclosure 13 and configured to inject digestate 12 into the enclosure 13 at the first height 54, in the volume 17.
- Figure 8 schematically shows a sectional view of an embodiment of the digester 240 according to the invention.
- the section is made at the level of the enclosure 13, perpendicular to the central vertical axis 60, making visible the elements present in (or connected to) the enclosure 13 for a better representation of the digester of the invention. Note that the foam/float evacuation device is not shown in this figure.
- a second stirrer 27 is present to impart a so-called horizontal rotational movement (represented by the arrow 271) to the volume of material 14 and therefore to the foams/floats which are on the upper surface of the volume of material. Only one second agitator 27 is shown but there could be more than one.
- the stirrer or stirrers 27 can be located on the periphery of the enclosure 13 but they can also be located more in the center of the enclosure.
- Two first agitators 25 are present to impart a so-called vertical rotational movement to the volume of material 14 and therefore to the foams/floats which are located on the upper surface of the volume of material.
- the first stirrers 25 are each positioned under a chimney 23.
- the foams/floats present on the surface of the volume of material 14 are moved from the center to the periphery by the so-called horizontal rotational movement thanks to the second agitators 27.
- the foams/floats descend through the chimneys 23 following the so-called vertical rotational movement generated by the first agitators 25.
- the injection of additional sludge into the chimneys 23 contributes to effective mixing of the injected sludge with the rest of the digestate already present in the enclosure.
- the first recirculation pump 31 is associated with the first recirculation loop (not shown) and aims to inject digestate 12 taken from the bottom of the enclosure 13 at the level of the gas overhead (second volume 17) by the first injector 29.
- the digestate is injected by the first injector above the volume of material 14, on the foams/floating present on the surface. The foams/floats are thus folded down. This injection also contributes to making them move towards the periphery of the enclosure.
- the second recirculation pump 51 is associated with the second recirculation loop (not shown) and aims to inject digestate 12 taken from the bottom of the enclosure 13 into the volume of material 14 at a height greater than the height from which the digestate was taken.
- This lateral injection sets the volume of material in motion and contributes to moving the foams/floats on the surface by initiating a rotational movement to prevent their stagnation and to send them towards the periphery of the enclosure, towards the chimneys 23.
- the second recirculation loop aims to inject digestate from a lower level of the enclosure into the digestate at an upper level of the enclosure to destratify the volume of material.
- the second recirculation pump 51 associated with the second recirculation loop may also aim to inject digestate 12 taken from the bottom of the enclosure 13 into the volume of material 14 at a height greater than the height at which the digestate has been withdrawn to inject the digestate withdrawn into the second volume, above the volume of material 14.
- first recirculation loop 30 and the second recirculation loop 50 can be grouped together in one and the same recirculation loop.
- This single recirculation loop can be powered by the first recirculation pump 31 and the second recirculation pump 51.
- the first recirculation pump 31 and the second recirculation pump 51 can form one and the same recirculation pump configured to recirculate digestate 12 to the first injector 29 and to the second injector 39, 49, either simultaneously or alternately.
- the digester 240 also comprises a dome 22 arranged on a portion of the roof 18, and intended to collect the biogas 11.
- the dome is arranged substantially above a chimney 23.
- the digestate mixture 12, foams/floats 16 and freshly introduced sludge which takes place at the level of the chimney 23 can make it possible to release pockets of biogas which will escape through the upper end 61 of the chimney 23. It is therefore judicious to position the dome 22 near the upper end 61 of the chimney 23.
- the dome is arranged substantially on the periphery of the roof 18 and above a second injector 39 fixed to the side wall of the digester in the volume 17.
- the injection of digestate 12 by the injector causes an effect mechanical foam flap which therefore protects the dome from possible foam intrusion.
- the digester may further comprise a valve disposed downstream of the second tank 34, for example at the level of a conduit at the outlet of the second tank 34. It may be any suitable type of valve, such as a pinch valve (pneumatic or mechanical) or a knife gate valve.
- the valve makes it possible to control the rate of evacuation of the contents of the second tank 34. In the closed position of the valve, there is no evacuation of the contents towards the tank 19.
- the digester may optionally include a device for activating the valve to open and close it.
- the digester can also comprise a programmer intended to trigger the device for activating the valve at predefined time intervals, so as to allow preventive evacuation of foams and floating matter. This results in better control of the quantity of foams/floats in the enclosure of the digester.
- the invention proposes a digester with a reduced gaseous sky making it possible to evacuate the foams/floating matter whatever their density and to maintain the integrity of the structure in the event of an RVE phenomenon.
- This is made possible thanks to the foam/float evacuation device operating by gravity with a double overflow device.
- the injection device makes it possible to move the foams/floats towards the periphery of the enclosure and the mixing device also contributes to moving the foams/floats towards the bottom of the enclosure.
- the combination of the injection device and the mixing device ensures both very good mixing of the foams and/or floating materials with the digestate to promote their reincorporation into the digestate, and both good evacuation by overflow of the foams and/or floats not reincorporated.
- the invention also relates to a digestion process by implementing a sludge methanization treatment to generate biogas 11 and a digestate 12 in a digester as described above.
- the digestate comprises on its surface foams and/or floats 16 originating from the sludge or generated during the methanation treatment.
- the digestion process according to the invention comprises a step of managing the foams and/or floating materials by evacuation according to their density. This management step includes:
- the conduit 37 connects the first tank 33 via the first orifice 101 to the first zone 35 of the second tank 34 via a second orifice 102, the second orifice 102 being located at an altitude greater than or equal to that of the first orifice 101, and the upper end of the first wall 100 being located at a first height h1 above a reference point of the first orifice 101 and the upper end of the second wall 103 being located at a second height h2 above the reference point of the first orifice 101.
- the first height h1 and the second height h2 are predefined so that a first mixture of variable proportions of digestate and foams and/or floats in the first tank 33 having a first average density d1 is transferred by gravity into the first zone 35 containing a second mixture of variable proportions of digestate and foams and/or second density floats d2, the transfer taking place as long as the product of the first average density d1 by the first height h1 is greater than the product of the second average density d2 by the second height h2 by the first height h1.
- the digestion method according to the invention further comprises a step of mixing the volume of material 14.
- the digestion method according to the invention further comprises a step of injecting digestate into the volume of material 14 and/or into the volume 17.
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Organic Chemistry (AREA)
- Bioinformatics & Cheminformatics (AREA)
- Zoology (AREA)
- Wood Science & Technology (AREA)
- Microbiology (AREA)
- Biotechnology (AREA)
- Genetics & Genomics (AREA)
- General Engineering & Computer Science (AREA)
- Sustainable Development (AREA)
- General Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Biochemistry (AREA)
- Molecular Biology (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- General Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Water Supply & Treatment (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Biodiversity & Conservation Biology (AREA)
- Medicinal Chemistry (AREA)
- Degasification And Air Bubble Elimination (AREA)
- Treatment Of Sludge (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR2102210A FR3120365A1 (fr) | 2021-03-08 | 2021-03-08 | Digesteur à volume de ciel gazeux réduit |
PCT/EP2022/055673 WO2022189324A1 (fr) | 2021-03-08 | 2022-03-07 | Digesteur a volume de ciel gazeux reduit |
Publications (1)
Publication Number | Publication Date |
---|---|
EP4304995A1 true EP4304995A1 (fr) | 2024-01-17 |
Family
ID=75539579
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP22710110.2A Pending EP4304995A1 (fr) | 2021-03-08 | 2022-03-07 | Digesteur a volume de ciel gazeux reduit |
Country Status (8)
Country | Link |
---|---|
US (1) | US20240166544A1 (fr) |
EP (1) | EP4304995A1 (fr) |
KR (1) | KR20230173653A (fr) |
CN (1) | CN116964010A (fr) |
AU (1) | AU2022233839A1 (fr) |
CA (1) | CA3210647A1 (fr) |
FR (1) | FR3120365A1 (fr) |
WO (1) | WO2022189324A1 (fr) |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4530762A (en) * | 1984-03-28 | 1985-07-23 | Love Leonard S | Anaerobic reactor |
US5228995A (en) | 1992-04-23 | 1993-07-20 | Stover Enos L | Biochemically enhanced hybrid anaerobic reactor |
WO2007099550A2 (fr) * | 2006-02-14 | 2007-09-07 | Nitin Sureshrao Chavan | Procédé et dispositif servant à réduire/réguler la formation de mousse sans l'aide d'un agent antimousse/démousseur lors d'un processus industriel |
FR2929268B1 (fr) | 2008-03-26 | 2012-07-06 | Otv Sa | Digesteur a moyens de confinement d'un biogaz |
US20120252066A1 (en) * | 2011-03-29 | 2012-10-04 | Heng Meng H | Methods of foam control |
-
2021
- 2021-03-08 FR FR2102210A patent/FR3120365A1/fr active Pending
-
2022
- 2022-03-07 KR KR1020237030707A patent/KR20230173653A/ko unknown
- 2022-03-07 EP EP22710110.2A patent/EP4304995A1/fr active Pending
- 2022-03-07 CN CN202280020369.1A patent/CN116964010A/zh active Pending
- 2022-03-07 WO PCT/EP2022/055673 patent/WO2022189324A1/fr active Application Filing
- 2022-03-07 CA CA3210647A patent/CA3210647A1/fr active Pending
- 2022-03-07 AU AU2022233839A patent/AU2022233839A1/en active Pending
- 2022-03-07 US US18/549,066 patent/US20240166544A1/en active Pending
Also Published As
Publication number | Publication date |
---|---|
US20240166544A1 (en) | 2024-05-23 |
FR3120365A1 (fr) | 2022-09-09 |
WO2022189324A1 (fr) | 2022-09-15 |
CA3210647A1 (fr) | 2022-09-15 |
KR20230173653A (ko) | 2023-12-27 |
AU2022233839A1 (en) | 2023-09-21 |
CN116964010A (zh) | 2023-10-27 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
EP2703364A1 (fr) | Installation démontable pour la production de biogaz | |
EP2705132A1 (fr) | Procédé pour la récolte de microalgues et dispositif pour la mise en oeuvre de ce procédé | |
FR2956657A1 (fr) | Procede et dispositif de desulfuration du biogaz d'un digesteur, et digesteur equipe d'un tel dispositif | |
WO2022189324A1 (fr) | Digesteur a volume de ciel gazeux reduit | |
WO2015135921A1 (fr) | Dispositif de séparation de constituants gazeux contenus dans un mélange gazeux, et son utilisation pour la séparation de méthane et de dioxyde de carbone d'un biogaz | |
EP2453004B1 (fr) | Procédé et installation de méthanisation de matière organique à haute teneur en solides | |
OA21456A (fr) | Digesteur a volume de ciel gazeux réduit. | |
EP3541920B1 (fr) | Systeme et procede de production de biogaz a partir de biomasse solide | |
EP1750831A1 (fr) | Dispositif d'injection d'un gaz dans un liquide | |
EP3421114B1 (fr) | Systeme de separation et d'epuration de deux gaz constitutifs d'un melange gazeux | |
KR102186892B1 (ko) | 스컴층 배출이 용이한 혐기소화장치 | |
EP3294860B1 (fr) | Dispositif de méthanisation à partir de biomasse solide et procédé de production de biogaz correspondant | |
EP3377608B1 (fr) | Dispositif de méthanisation à partir de biomasse solide et procédé de production de biogaz correspondant | |
FR2929268A1 (fr) | Digesteur a moyens de confinement d'un biogaz | |
EP3541921B1 (fr) | Système de production de biogaz à partir de biomasse solide et procédé de biogaz correspondant | |
LU501102B1 (fr) | Reacteur de methanation biologique exploitant une flore microbienne en suspension et procede de mise en oeuvre d’un tel reacteur | |
EP3111739A1 (fr) | Dispositif pour la methanisation par voie seche de matiere organique comprenant du fumier | |
CA2704793A1 (fr) | Digesteur anaerobie lavable avec biofilm fixe | |
FR2779660A1 (fr) | Procede et installation pour le traitement d'un milieu reactionnel susceptible de provoquer un moussage expansif | |
OA18461A (fr) | Dispositif de méthanisation à partir de biomasse solide et procédé de production de biogaz correspondant | |
FR2750889A1 (fr) | Procede et dispositif d'injection d'un gaz dans un liquide | |
EP0325643B1 (fr) | Appareil pour le traitement anaerobie d'eaux usees | |
FR2580294A1 (fr) | Procede de fermentation et perfectionnement aux fermenteurs a garnissage | |
FR2470161A1 (fr) | Dispositif de fermentation anaerobie en continu d'une masse heterogene |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: UNKNOWN |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE INTERNATIONAL PUBLICATION HAS BEEN MADE |
|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: REQUEST FOR EXAMINATION WAS MADE |
|
17P | Request for examination filed |
Effective date: 20231006 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR |
|
DAX | Request for extension of the european patent (deleted) | ||
RAV | Requested validation state of the european patent: fee paid |
Extension state: TN Effective date: 20231006 Extension state: MA Effective date: 20231006 |