CN211057122U - Pre-aeration heating sequencing batch anaerobic dry fermentation device - Google Patents
Pre-aeration heating sequencing batch anaerobic dry fermentation device Download PDFInfo
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- CN211057122U CN211057122U CN201921615086.3U CN201921615086U CN211057122U CN 211057122 U CN211057122 U CN 211057122U CN 201921615086 U CN201921615086 U CN 201921615086U CN 211057122 U CN211057122 U CN 211057122U
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Abstract
The utility model discloses a pre-aeration temperature-rising sequencing batch anaerobic dry fermentation device, which comprises an anaerobic dry fermentation reactor and an aeration mechanism, wherein a sealing cover is covered on the anaerobic dry fermentation reactor in a detachable way, a material reaction area is arranged in the anaerobic dry fermentation reactor and is used for placing reaction materials, a gas outlet hole is arranged at the upper end of the anaerobic dry fermentation reactor, a liquid outlet hole is arranged at the lower end of the anaerobic dry fermentation reactor, the aeration mechanism comprises a fan, an air inlet pipe and an aeration pipe, one end of the air inlet pipe is communicated with the fan, the other end of the air inlet pipe passes through an air inlet hole of the anaerobic dry fermentation reactor and is communicated with the aeration pipe, the aeration pipe is positioned in the material reaction area, a spray head is arranged above the inside of the anaerobic dry fermentation reactor, and can spray liquid to the material reaction area, thereby realizing the self-heating of the reaction materials, the anaerobic fermentation temperature requirement of the materials is ensured, and the reaction efficiency and the yield are improved.
Description
Technical Field
The utility model relates to the technical field of marsh gas preparation equipment, in particular to a pre-aeration heating sequencing batch anaerobic dry fermentation device.
Background
In recent decades, with the rapid development of economy and society in China, the output of rural domestic garbage is greatly increased, crop straws produced in China are about 10.4 hundred million tons, 20% of the crop straws are not effectively utilized, livestock and poultry manure is about 38 hundred million tons, more than 40% of the livestock and poultry manure is not effectively utilized, vegetable wastes are 1.0 hundred million tons, rural domestic garbage and human excrement are 2.5 hundred million tons, meat processing plant and crop processing field wastes are 1.5 million tons, forestry wastes (excluding salary carbon forest) are 0.5 million tons, organic wastes of other types are about 0.5 million tons, about 7 million tons of standard coal is combined, most of the standard coal is not effectively utilized, and the rural agricultural environment in China is seriously threatened. The current disposal and utilization modes of municipal refuse, such as landfill, incineration and compost, face the problems of large land occupation, high treatment cost, easy secondary pollution and the like, and are difficult to meet the harmless and recycling disposal requirements of China in new period. The anaerobic fermentation technology is a key link for treating organic wastes and producing biological energy, namely 'methane', is an important way for recycling agricultural wastes, and is divided into wet anaerobic fermentation (TS < 15%) and dry anaerobic fermentation (TS is more than or equal to 15%) according to the difference of solid content of fermentation substrates.
A large number of practices show that a large amount of biogas slurry is produced by wet fermentation, and secondary pollution is easily caused by improper application. Meanwhile, when agricultural wastes are used as raw materials, impurities such as sand, stone, mulching films and soil blocks easily damage feeding devices, stirring devices and other devices, stable operation of biogas engineering is affected, and meanwhile, large-scale farms in China increasingly adopt a dry manure cleaning process, so that the solid content of manure generated in the farms is high, and a large amount of water resources are consumed for adjusting the water content by using a wet fermentation process. The dry anaerobic fermentation has large processing capacity of raw materials, can obviously reduce the addition of exogenous water, has high volumetric gas production efficiency and lower operation energy consumption, and can directly be used for producing organic fertilizers without carrying out solid-liquid separation on discharged biogas residues. According to different feeding and discharging modes, dry fermentation is divided into a continuous anaerobic dry fermentation process and a sequencing batch anaerobic dry fermentation process, the industrialization of producing the methane by dry anaerobic fermentation in foreign countries has been carried out for nearly 30 years, the raw materials mainly comprise domestic garbage, municipal sludge, energy crops and the like, the raw materials account for about 70 percent of the total number of dry fermentation methane projects, and the volume gas production is 2-4 m3/(m3·d-1) The domestic dry anaerobic fermentation is still in the pilot stage, mainly adopts the sequencing batch anaerobic dry fermentation technology, and the volume gas production rate is only 0.5m3/(m3·d-1) Left and right. In addition, the agricultural wastes have high fiber content and poor fluidity, and the selection of a continuous process is limited. In the prior sequencing batch anaerobic dry fermentation technology, an external heating source is needed to ensure the growth and reaction efficiency of microorganisms in a fermentation tank, and meanwhile, as a stirring and feeding and discharging pipeline conveying pump is not adopted in the sequencing batch anaerobic dry fermentation technology, the mechanical energy consumption can be reduced, but the problems of incomplete reaction of reactants, unstable fermentation, low yield and the like exist.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a dry fermenting installation of formula anaerobism is criticized to aeration intensification preface in advance to solve the problem that above-mentioned prior art exists, realize reaction material's self-heating, can guarantee the anaerobic fermentation temperature requirement of material, still improve reaction efficiency and output rate.
In order to achieve the above object, the utility model provides a following scheme:
the utility model provides a pre-aeration temperature-rising sequencing batch anaerobic dry fermentation device, which comprises an anaerobic dry fermentation reactor and an aeration mechanism, the anaerobic dry fermentation reactor is detachably covered with a sealing cover, a material reaction area is arranged in the anaerobic dry fermentation reactor, the material reaction zone is used for placing reaction materials, the upper end of the anaerobic dry fermentation reactor is provided with an air outlet hole, the lower end of the anaerobic dry fermentation reactor is provided with a liquid outlet hole, the liquid outlet hole is provided with a filtrate regulating switch, the aeration mechanism comprises a fan, an air inlet pipe and an aeration pipe, one end of the air inlet pipe is communicated with the fan, the other end of the air inlet pipe penetrates through an air inlet hole of the anaerobic dry fermentation reactor to be communicated with the aeration pipe, the aeration pipe is positioned in the material reaction area, a spray head is arranged above the inside of the anaerobic dry fermentation reactor, and the spray head can spray liquid to the material reaction area.
Preferably, the side wall of the anaerobic dry fermentation reactor is of a double-layer structure, and a heat-insulating layer is filled in the side wall of the anaerobic dry fermentation reactor.
Preferably, a flow meter and a gas regulating switch are sequentially arranged on the gas inlet pipe, and the flow meter and the gas regulating switch are both positioned outside the anaerobic dry fermentation reactor.
Preferably, a temperature controller is fixed on the outer wall of the anaerobic dry fermentation reactor, a temperature probe is arranged in the material reaction area, a probe support is fixed on the inner wall of the anaerobic dry fermentation reactor, the temperature probe is fixed at the free end of the probe support, the temperature probe is electrically connected with the temperature controller, and the temperature controller can send a control signal to the fan.
Preferably, the air outlet hole is communicated with an air collecting bag through an air outlet pipe, and a wet gas flowmeter is arranged on the air outlet pipe.
Preferably, the top and the bottom of the material reaction zone are both paved with seepage filter screens.
Preferably, the liquid outlet hole is communicated with a percolation pipe, the percolation adjusting switch is arranged on the percolation pipe, and the percolation pipe is communicated with a percolation collecting tank.
Preferably, the filtrate collection tank is communicated with the liquid inlet end of the peristaltic pump, the liquid outlet end of the peristaltic pump is communicated with a filtrate return pipe, and the filtrate return pipe is communicated with the spray header.
The utility model also provides a formula anaerobism dry fermentation method is criticized to preliminary aeration intensification preface, in the above technical scheme of application preliminary aeration intensification preface formula anaerobism dry fermentation device to including the aerobic fermentation step and the anaerobism dry fermentation step of preliminary heating up:
s1: a pre-heating aerobic fermentation step: selecting reaction materials with the solid content of 25-45%, starting the aeration mechanism to introduce air into the anaerobic dry fermentation reactor during operation, wherein the aeration frequency is 0.5-1.5 m3/(m3·d-1) When the temperature rises to 35-40 ℃, closing the aeration mechanism to stop aeration, and sealing the anaerobic dry fermentation reactor;
s2: anaerobic dry fermentation: in the anaerobic dry fermentation process, the discharged sludge at the bottom in the wet anaerobic fermentation technology is firstly used as an inoculum, and then the spray head is opened to spray according to a certain spraying mode, so that the anaerobic dry fermentation of the reaction materials is carried out.
Preferably, 4-12 anaerobic dry fermentation reactors are arranged, each anaerobic dry fermentation reactor is arranged in parallel, each anaerobic dry fermentation reactor is opened in a sequential batch mode, and the step S1 and the step S2 are sequentially completed in each anaerobic dry fermentation reactor, wherein the sequential batch mode is that one anaerobic dry fermentation reactor is firstly opened, and the next anaerobic dry fermentation reactor is started when the temperature of aerobic fermentation in the anaerobic dry fermentation reactor which is firstly opened is raised to 35-40 ℃.
The utility model discloses for prior art gain following technological effect:
the utility model discloses one side at anaerobism dry fermentation reactor is equipped with aeration mechanism, carry out the aeration in to anaerobism dry fermentation reactor through aeration mechanism, make reaction material take place aerobic fermentation, thereby under the condition of no external heating source, realize carrying out self-heating in the anaerobism dry fermentation reactor, reach reaction material's anaerobic fermentation temperature requirement, and reaction material heated area is even, there is not the cold core phenomenon, thereby can show improvement reaction efficiency, simultaneously at the aeration in-process, reaction material is fully turned, help redistributing and improve the clearance between the reaction material granule to reaction material granule size, and be favorable to hot transmission, evenly distributed, thereby can show improvement reaction efficiency and marsh gas output rate.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic structural view of a pre-aeration temperature-raising sequencing batch anaerobic dry fermentation device of the utility model;
wherein: 1-anaerobic dry fermentation reactor, 101-material reaction zone, 102-insulating layer, 103-spray head, 104-filter screen, 105-air outlet, 2-filtrate collecting tank, 201-filtrate collecting zone: 202-percolation pipe, 203-filtrate regulating switch, 204-peristaltic pump, 205-filtrate return pipe, 206-reflux regulating switch, 3-aeration mechanism, 301-blower, 302-air inlet pipe, 303-flowmeter, 304-gas regulating switch, 305-aeration pipe, 306-temperature controller, 307-temperature probe.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention is described in detail with reference to the accompanying drawings and the detailed description.
The first embodiment is as follows:
as shown in fig. 1: the embodiment provides a pre-aeration temperature-rising sequencing batch anaerobic dry fermentation device, which comprises an anaerobic dry fermentation reactor 1 and an aeration mechanism 3, wherein a sealing cover is detachably covered on the anaerobic dry fermentation reactor 1, a material reaction area 101 is arranged in the anaerobic dry fermentation reactor 1, the material reaction area 101 is used for placing reaction materials, an air outlet 105 is arranged at the upper end of the anaerobic dry fermentation reactor 1, a liquid outlet is arranged at the lower end of the anaerobic dry fermentation reactor 1, concretely, as shown in figure 1, the air outlet 105 is arranged at the upper right corner of the anaerobic dry fermentation reactor 1, the air outlet 105 is used for collecting biogas, the air outlet 105 is communicated with an air collecting bag through an air outlet pipe, a wet gas flowmeter is arranged on the air outlet pipe to record the generated biogas amount, the liquid outlet is arranged at the center of the bottom of the anaerobic dry fermentation reactor 1, a filtrate regulating switch 203 is arranged on the liquid outlet, the filtrate regulating switch 203 is used for regulating percolate, the liquid outlet is used for discharging liquid in the anaerobic dry fermentation reactor 1, the side wall of the anaerobic dry fermentation reactor 1 is of a double-layer structure, and a heat preservation layer 102 is filled in the side wall of the anaerobic dry fermentation reactor 1 and plays a role in heat preservation of the anaerobic dry fermentation reactor 1.
As in fig. 1, the aeration mechanism 3 is disposed at the lower left side of the anaerobic dry fermentation reactor 1, the aeration mechanism 3 includes a fan 301, an air inlet pipe 302 and an aeration pipe 305, the aeration pipe 305 is disposed inside the material reaction zone 101, a plurality of aeration holes are disposed on the aeration pipe 305, uniform aeration is facilitated, an air inlet hole is disposed at the lower left corner of the anaerobic dry fermentation reactor 1, one end of the air inlet pipe 302 is communicated with the fan 301, the other end of the air inlet pipe 302 passes through the air inlet hole to be communicated with the aeration pipe 305, a flow meter 303 and a gas adjusting switch 304 are sequentially disposed on the air inlet pipe 302, the flow meter 303 and the gas adjusting switch 304 are both disposed outside the anaerobic dry fermentation reactor 1, so as to record the amount of introduced gas, and the speed of gas introduction and the aeration degree of gas are adjusted by the. The upper part of the inside of the anaerobic dry fermentation reactor 1 is provided with a spray head 103, the spray head 103 can spray liquid to the material reaction area 101, namely, the liquid required by the reaction material is provided, one side of the anaerobic dry fermentation reactor 1 is provided with an aeration mechanism 3, aeration is carried out in the anaerobic dry fermentation reactor 1 through the aeration mechanism 3, the reaction material is subjected to aerobic fermentation, thereby self-heating in the anaerobic dry fermentation reactor 1 is realized, the reaction material reaches the temperature suitable for the anaerobic dry fermentation by utilizing the heat generated in the biochemical reaction process under the condition of no external heating source, the heating area of the reaction material is uniform, the cold core phenomenon does not exist, the reaction efficiency can be obviously improved, the operation energy consumption is obviously reduced, the important popularization value for promoting the development and the conversion of the high-efficiency and low-consumption anaerobic dry fermentation technology is achieved, and simultaneously, the reaction material is fully turned over in the aeration process, the reactor is beneficial to redistribution of the sizes of the reaction material particles and improvement of gaps among the reaction material particles, and is beneficial to heat transfer and uniform distribution, so that the reaction efficiency, the treatment efficiency and the biogas output rate can be obviously improved.
Specifically, the outer wall of the anaerobic dry fermentation reactor 1 can be fixedly provided with a temperature controller 306, the material reaction zone 101 is internally provided with a temperature probe 307, the temperature probe 307 is fixed on the inner wall of the anaerobic dry fermentation reactor 1 by a probe bracket, specifically, the probe bracket is fixed on the inner wall of the anaerobic dry fermentation reactor 1, the temperature probe 307 is fixed at the free end of the probe bracket, the temperature probe 307 is electrically connected with the temperature controller 306, the temperature controller 306 can send a control signal to the fan 301, specifically, when the aeration mechanism 3 aerates the anaerobic dry fermentation reactor 1, aerobic fermentation occurs in the material reaction zone 101, when the temperature reaches the set temperature, the temperature probe 307 transmits the sensed temperature to the temperature controller 306, and the temperature controller 306 sends a control signal to the fan 301 to stop the fan 301 and stop aeration, so that the control temperature is maintained at 35 +/-1 ℃ during the reaction.
The top and the bottom of the material reaction zone 101 are respectively paved with a percolation net 104, the percolation net 104 can allow the percolation liquid to pass through and percolates to the position of a liquid outlet, the liquid outlet is communicated with a percolation pipe 202, the percolation pipe 202 is provided with a percolation liquid adjusting switch 203, the percolation pipe 202 is communicated with a percolation liquid collecting tank 2, the percolation liquid flows into a percolation liquid collecting zone 201 of the percolation liquid collecting tank 2 through the liquid outlet and the percolation pipe 202, the percolation liquid adjusting switch 203 is closed, and the percolation liquid stays in the anaerobic dry fermentation reactor 1 to soak reaction materials. The filtrate collection tank 2 is communicated with a liquid inlet end of the peristaltic pump 204, a filtrate return pipe 205 is communicated with a liquid outlet end of the peristaltic pump 204, the filtrate return pipe 205 is communicated into the anaerobic dry fermentation reactor 1, the end part of the filtrate return pipe 205 communicated with the anaerobic dry fermentation reactor 1 is communicated with the spray header 103, a return flow adjusting switch 206 is further arranged on the filtrate return pipe 205, percolate in the filtrate collection tank 2 flows back to the anaerobic dry fermentation reactor 1 by using the peristaltic pump 204 and is uniformly sprayed to a reaction material area through the spray header 103, so that circulation and repeated use of the percolate are realized, the percolate is basically not discharged or the discharge amount is less, biogas generated after digestion is clean energy, the discharge amount of greenhouse effect gas can be reduced, and secondary pollution is reduced.
Example two:
the embodiment provides a pre-aeration heating sequencing batch anaerobic dry fermentation method, which applies the pre-aeration heating sequencing batch anaerobic dry fermentation device in the technical scheme and comprises a pre-heating aerobic fermentation step and an anaerobic dry fermentation step:
s1: a pre-heating aerobic fermentation step: selecting a reaction material with a solid content of 25-45%, preferably 35%, in the step, mixing and fermenting the reaction material according to a certain dry matter proportion, if the raw materials are mixed corn straw and cow dung, the reaction material proportion is preferably 6:4 (the corn straw and the cow dung), firstly opening an aeration mechanism 3 to introduce air into an anaerobic dry fermentation reactor 1 during operation, wherein the aeration frequency is 0.5-1.5 m3/(m3·d-1) Preferably 1m3/(m3·d-1) When the temperature rises to 35-40 ℃, preferably 35 ℃, closing the aeration mechanism 3 to stop aeration, and sealing the anaerobic dry fermentation reactor 1;
s2: anaerobic dry fermentation: in the anaerobic dry fermentation process, the discharged sludge at the bottom in the wet anaerobic fermentation technology is firstly adopted as an inoculum (the solid content is about 5 percent), then the spray head 103 is opened to spray according to a certain spraying mode, and preferably, the peristaltic pump 204 can be adopted to recycle percolate, thereby carrying out the anaerobic dry fermentation of the reaction materials.
Preferably, 4-12 anaerobic dry fermentation reactors 1 are arranged, specifically 8 anaerobic dry fermentation reactors 1 are arranged in parallel, specifically, the air outlet 105 of each anaerobic dry fermentation reactor 1 is communicated with the same air outlet pipe in parallel, each anaerobic dry fermentation reactor 1 is started in a sequential batch mode, and the step S1 and the step S2 are sequentially completed in each anaerobic dry fermentation reactor 1, the sequential batch mode is that one anaerobic dry fermentation reactor 1 is started first, and the next anaerobic dry fermentation reactor 1 is started when the aerobic fermentation in the anaerobic dry fermentation reactor 1 which is started first is heated to 35-40 ℃. The specific sequencing batch mode is as follows, the first anaerobic dry fermentation reactor 1 is started to carry out the step S1, when the aerobic fermentation in the first anaerobic dry fermentation reactor 1 is heated to 35-40 ℃, the second anaerobic dry fermentation reactor 1 is started to carry out the step S1, the step S1 and the step S2 are continuously carried out in the first anaerobic dry fermentation reactor 1, when the aerobic fermentation in the second anaerobic dry fermentation reactor 1 is heated to 35-40 ℃, the third anaerobic dry fermentation reactor 1 is started to carry out the step S1, the step S1 and the step S2 are continuously carried out in the second anaerobic dry fermentation reactor 1, and the rest is carried out in sequence, so that the sequencing batch starting operation among the anaerobic dry fermentation batch reactors 1 is formed, and the continuous and stable methane production is ensured. The method is suitable for treating agricultural and rural production and domestic waste, such as crop straws, livestock and poultry manure and the like, can save heating energy consumption by more than 30 percent, and can also keep the volume ratio of methane produced at a stable position of 0.5-0.8 m3/(m3·d-1)。
The specific spraying mode is as follows: spraying every 24 hours 5 days before anaerobic dry fermentation, wherein the spraying amount of each time meets 1/2 of the volume of the soaked reaction materials, closing the filtrate adjusting switch 203 to soak in each spraying process, wherein the soaking time is 6-24 hours, preferably 12 hours, and an inoculation environment is provided for the reaction materials after aeration to inoculate anaerobic microorganisms; carrying out anaerobic dry fermentation for 6-10 days, and spraying once every 12 h; carrying out anaerobic dry fermentation for 11-20 days, and spraying once every 6 h; carrying out anaerobic dry fermentation for 21-30 days, and spraying once every 4 h; carrying out anaerobic dry fermentation for 31-40 days, and spraying once every 2 h; and the spraying amount of the fermentation for 6-40 days is set to 1/3 of the volume of the reaction material, no soaking is performed in the spraying process, the filtrate adjusting switch 203 is kept to start percolation, and the percolation liquid is percolated to the filtrate collecting tank 2. The period of the anaerobic fermentation stage in each anaerobic dry fermentation reactor 1 was 40 days.
The principle and the implementation mode of the present invention are explained by applying specific examples in the present specification, and the above descriptions of the examples are only used to help understanding the method and the core idea of the present invention; meanwhile, for the general technical personnel in the field, according to the idea of the present invention, there are changes in the concrete implementation and the application scope. In summary, the content of the present specification should not be construed as a limitation of the present invention.
Claims (8)
1. A pre-aeration temperature-rising sequencing batch anaerobic dry fermentation device is characterized in that: the anaerobic dry fermentation device comprises an anaerobic dry fermentation reactor and an aeration mechanism, wherein a sealing cover is detachably covered on the anaerobic dry fermentation reactor, a material reaction area is arranged in the anaerobic dry fermentation reactor and used for placing reaction materials, an air outlet hole is formed in the upper end of the anaerobic dry fermentation reactor, a liquid outlet hole is formed in the lower end of the anaerobic dry fermentation reactor, a filtrate adjusting switch is arranged on the liquid outlet hole, the aeration mechanism comprises a fan, an air inlet pipe and an aeration pipe, one end of the air inlet pipe is communicated with the fan, the other end of the air inlet pipe penetrates through an air inlet hole of the anaerobic dry fermentation reactor and is communicated with the aeration pipe, the aeration pipe is located inside the material reaction area, a spray head is arranged above the inside of the anaerobic dry fermentation reactor, and the spray head can spray liquid to the material reaction area.
2. The pre-aerated elevated-temperature sequencing batch anaerobic dry fermentation apparatus of claim 1, wherein: the side wall of the anaerobic dry fermentation reactor is of a double-layer structure, and a heat-insulating layer is filled in the side wall of the anaerobic dry fermentation reactor.
3. The pre-aerated elevated-temperature sequencing batch anaerobic dry fermentation apparatus of claim 1, wherein: and the gas inlet pipe is sequentially provided with a flowmeter and a gas regulating switch, and the flowmeter and the gas regulating switch are both positioned outside the anaerobic dry fermentation reactor.
4. The pre-aerated elevated-temperature sequencing batch anaerobic dry fermentation apparatus of claim 1, wherein: the anaerobic dry fermentation device is characterized in that a temperature controller is fixed on the outer wall of the anaerobic dry fermentation reactor, a temperature probe is arranged in the material reaction area, a probe bracket is fixed on the inner wall of the anaerobic dry fermentation reactor, the temperature probe is fixed at the free end of the probe bracket, the temperature probe is electrically connected with the temperature controller, and the temperature controller can send a control signal to the fan.
5. The pre-aerated elevated-temperature sequencing batch anaerobic dry fermentation apparatus of claim 1, wherein: the air outlet hole is communicated with an air collecting bag through an air outlet pipe, and a wet type gas flowmeter is arranged on the air outlet pipe.
6. The pre-aerated elevated-temperature sequencing batch anaerobic dry fermentation apparatus of claim 1, wherein: and seepage filter screens are paved at the top and the bottom of the material reaction zone.
7. The pre-aerated elevated-temperature sequencing batch anaerobic dry fermentation apparatus of claim 1, wherein: the liquid outlet hole is communicated with a percolation pipe, the percolation adjusting switch is arranged on the percolation pipe, and the percolation pipe is communicated with a percolation collecting tank.
8. The pre-aerated elevated-temperature sequencing batch anaerobic dry fermentation apparatus of claim 7, wherein: the liquid inlet end intercommunication of filtrating holding vessel and peristaltic pump, the play liquid end intercommunication of peristaltic pump has the filtrating back flow, the filtrating back flow with the shower head intercommunication.
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| CN201921615086.3U CN211057122U (en) | 2019-09-26 | 2019-09-26 | Pre-aeration heating sequencing batch anaerobic dry fermentation device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110468045A (en) * | 2019-09-26 | 2019-11-19 | 农业农村部规划设计研究院 | A kind of preaeration heating batch-type anaerobic dry fermentation apparatus and method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110468045A (en) * | 2019-09-26 | 2019-11-19 | 农业农村部规划设计研究院 | A kind of preaeration heating batch-type anaerobic dry fermentation apparatus and method |
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