CN202107700U - Separate two-phase anaerobic fermentation device - Google Patents

Abstract

The utility model relates to a separate two-phase anaerobic fermentation device, which comprises a hydrolytic acidification reaction device, an anaerobic fermentation device, a biogas treatment device and a biogas slurry oxidation device, wherein the hydrolytic acidification reaction device comprises at least two parallel-connected hydrolytic acidification reaction tanks of a hydrolytic acidification basic unit, and a hydrolyzate collection tank, and the anaerobic fermentation device is a sealed anaerobic digestion reactor; a feed port is arranged at the bottom of the anaerobic fermentation device, and a biogas outlet is arranged at the top of the anaerobic fermentation device; a biogas slurry overflowing port is arranged at a position which is 80% -90% of the total height of the anaerobic fermentation device, and the biogas slurry oxidation device is a biogas slurry oxidation tank; and baffles which are vertically staggered are arranged in the biogas slurry oxidation device, and the volume ratio of the hydrolytic acidification tank, the anaerobic digestion reactor, and the biogas slurry oxidation tank is 2-5:1:0.2-0.5.

Description

Separate two-phase anaerobic fermentation fermentation device

technical field

The utility model relates to a separated two-phase anaerobic fermentation fermentation device, which belongs to the fields of rural ecological environment protection and rural renewable clean energy utilization.

Background technique

In recent years, with the rapid development of my country's economy and the acceleration of urbanization, environmental issues have been paid more and more attention by people. According to a survey conducted by the Ministry of Housing and Urban-Rural Development on some rural areas across the country in 2005, more than 8 billion tons of domestic sewage are produced in rural areas of our country every year, and 96% of rural areas have no sewage treatment and collection systems, and domestic sewage is discharged randomly, which seriously endangers drinking water and ecological environment safety. and the health of the residents. In addition, a large number of crop stalks are not used, abandoned or burned at will, causing serious environmental pollution and fire accidents.

Using rice straw and domestic sewage as biogas raw materials for mixed anaerobic fermentation can solve the problem of rural environmental pollution on the one hand, and on the other hand can also produce clean energy biogas, which meets the dual needs of environmental protection and sustainable development.

The patent with the publication number CN1769220 proposes a biogas production technology using kitchen waste, straw, livestock and poultry manure and activated sludge as raw materials. The anaerobic digestion sludge of the treatment plant is used as the seed sludge, and the raw food waste, straw, livestock and poultry manure, activated sludge and seed sludge are mixed in the reactor, and the quality of the food waste, straw, livestock and poultry manure and activated sludge The ratio is 1:1:1:1, the amount of seed mud is 25% of the raw material, the northern region adopts anaerobic fermentation at medium temperature 33-37°C, and the southern region adopts medium-high temperature anaerobic fermentation at 33-55°C, and the pH value is maintained at 7.0, the humidity is controlled at 90%-100%, the residence time of the material in the reactor is 40-45 days; the material is fed in and out every 2 days.

The patent with the publication number CN101020912 proposes a method for producing biogas by mixing and fermenting methane bacteria backflow and crushed straw raw materials. , and then into the biogas fermentation tank, the methane-containing bacteria slag discharged from the discharge pipe at the bottom of the biogas fermentation tank, according to the actual measured number of methanogens, the volume ratio of the methane-containing bacteria slag to the newly input straw material is 0.5 to 8.0 : 1.0 ratio mixed and input to biogas fermentation tank for continuous fermentation to produce biogas.

The patent with the publication number CN10159167 proposes a biogas fermentation method for pure straw without composting and retting. The method is as follows: start the fermentation process according to the conventional method, inoculate and feed the straw with the preferred biogas residue of the strain, and feed the straw according to the water-to-material ratio of 9:1. Add water, stop feeding when the added water accounts for 10% of the total fermentation volume of the biogas digester, and wait for gas production; after normal gas production, feed the crushed or silage straw according to the multi-point feeding method, and only one feeder per day Feed at the feed port, and replace the feed with the next feed port on the next day, so as to circulate the feed day by day; there are multiple nozzles installed on the top of the biogas tank, and a sludge pump is installed at the bottom of the pool, and the biogas is pumped by the sludge pump through the infusion pipeline. The biogas slurry in the lower part of the pond is sent to the nozzle, and the fermentation raw materials that enter the biogas tank and float on the upper part of the biogas slurry are sprayed to acidify and neutralize the raw materials. of waste residue.

The processes proposed in the above patents are all single-phase anaerobic fermentation processes, that is, hydrolysis acidification and methane production are carried out in the same reactor. A new anaerobic biological treatment process was developed by Ghosh and Pohland in the United States in the early 1970s for the various types of organic waste in rural areas, complex sources, and biological processes based on anaerobic fermentation. The fermentation system enables the two reaction stages of hydrolysis acidification and methanogenic reaction to be carried out in two reaction systems respectively, creating two different biological and nutritional environmental conditions, such as temperature and pH value, to form acidogenic fermentation microorganisms and methanogenic fermentation respectively. The best ecological conditions for microorganisms, in order to achieve the purpose of optimizing the process parameters of each stage. Ghosh (1995) used urban solid waste organic matter as a substrate and found that in the two-phase digestion process, the biogas yield and the conversion rate of volatile solids were increased compared with the single-phase method. Zhang et al. carried out two-phase digestion in 1999. Experimental research on anaerobic fermentation treatment of rice straw. This process reasonably divides and connects solid-state fermentation and liquid-state fermentation, which improves the stability of the reaction and the volume utilization of the reactor, and also improves the efficiency of anaerobic biodegradation. Lehtom ki (2008) used two-phase fermentation and single-phase fermentation to treat silage grass. The acid production stage of single-phase fermentation and two-phase fermentation was completed in the trickling filter bed reactor, and the methanogenic stage was completed in the UASB reactor. The test results show that the methane yield reaches 66% of the theoretical methane yield when the two-phase fermentation process is adopted, while the single-phase fermentation only has 20%. Liu Guangqing (2006, 2007) conducted single-phase and two-phase anaerobic fermentation experiments using a mixture of kitchen waste and weed waste as the fermentation substrate. The results showed that, compared with batch digestion, the two-phase system had a higher pollution load and yield The gas is stable and the cycle is short, which is an effective way to deal with this type of organic waste. Zhang Xingqing (2009) used the two-phase method to study the hydrolysis test of urban organic waste, showing that the biogas slurry reflux method can obtain a higher organic carbon dissolution rate, and De LaRubia (2010) studied the residue of sunflower seed pressing residue as the substrate It was found that under the conditions of hydraulic retention time of 10 days and organic load of 6gVS L ^-1 d ^-1 , the hydrolysis rate can reach 86%. Seung Gu Shin (2010) studied the two-phase reactor by using the method of molecular biology In the dominant microbial flora, it is found that the dominant microorganisms in the hydrolysis phase will change with the organic load, but in the methanogenic phase, the dominant population structure is stable, which further proves that the two-phase method can optimize the ecological conditions of two types of functional microorganisms. . Two-phase fermentation can be carried out in two independent reactors, or in two reaction zones in one reactor. The Planning Institute of the Ministry of Agriculture has developed an integrated two-phase anaerobic digestion technology (public number CN201581074U) , that is to realize the two-phase partition of "acid production by solid-phase filter and full-mixed methane production by liquid phase" in the same digester, which ensures the suitable growth environment for acid-producing bacteria and methanogenic bacteria in their respective reaction zones. Compared with the single-phase fermentation process, the two-phase anaerobic digestion technology can achieve at least the following two purposes, one is to increase the activity of methanogenic bacteria in the methanogenic phase reactor; the other is to improve the stability and treatment effect of the entire treatment system .

However, when the above-mentioned research results and patented technologies involve straw as a raw material, it is proposed that pretreatment such as composting or crushing is required, and it is difficult to feed and discharge materials, and the operation requirements are high, and the cost of straw crushing is high, and the working conditions and environment In addition, Zhu Jin et al. (2011) compared two-phase and single-phase fermentation of straw and found that if the phase separation in the two-phase process is not good , because the methanogenic bacteria in the methanogenic phase continuously enter the hydrolysis and acidification tank, the proportion of biogas produced in the final hydrolysis and acidification phase accounts for 79.52% of the total biogas production, and the hydrolysis and acidification phase is often open, which will inevitably lead to a large amount of methane , carbon dioxide and other greenhouse gases, which runs counter to the concept of low-carbon and recycling technology of biogas projects; thirdly, existing biogas projects will produce a large amount of biogas slurry, if it is not properly used and discharged randomly, it will inevitably cause secondary pollution. secondary pollution or aggravate the burden of subsequent purification treatment, and the current technologies and patents have not effectively solved these practical problems.

Utility model content

The purpose of this utility model is: the existing rural organic waste anaerobic fermentation biogas production technology requires pretreatment of materials such as crushing or crushing or composting, and the operation is complicated and the technical requirements are high. Secondly, both the hydrolysis and acidification batch The two-phase fermentation process with secondary feed and semi-continuous feed in the methanogenic phase does not require special pretreatment of the substrate, but requires the hydrolysis and acidification reactor to be sealed to collect part of the biogas, thus increasing the construction, entry and exit. Due to the difficulty of material operation and the increase of investment cost, a separate two-phase anaerobic fermentation device was proposed.

The purpose of this utility model is achieved in the following way: a separate two-phase anaerobic fermentation fermentation device is characterized in that it includes a hydrolysis acidification reaction device, anaerobic fermentation device, biogas treatment device and biogas slurry oxidation device, wherein:

a) The hydrolytic acidification reaction device includes at least two parallel hydrolytic acidification reaction tanks and hydrolyzed liquid collection tanks, each basic unit is an open material storage tank, and the material storage tank is equipped with hydrolytic acidification liquid outlet and the reuse inlet of the oxidized biogas slurry, the outlet of the hydrolysis and acidification solution is located at the bottom of the material accumulation tank, and communicates with the hydrolysis solution collection tank, the outlet of the hydrolysis and acidification solution and the reuse inlet of the oxidized biogas slurry Each is equipped with an independent control valve; the upper part of each basic unit is equipped with an independent fence cover, and each basic unit is equipped with an independent rainproof shed; the reuse inlet of the oxidized biogas slurry is higher than or equal to The installation location of the fence cover;

b) The described anaerobic fermentation device is a closed anaerobic digestion reactor, the bottom of the anaerobic digestion reactor is provided with a feed inlet, and the top of the anaerobic digestion reactor is provided with a biogas output port. In the anaerobic digestion reactor 0.8 The height of ~0.9 is equipped with a biogas slurry overflow port, and the biogas slurry overflow port is equipped with a filter device; the hydrolyzate collection tank communicates with the feed port of the anaerobic digestion reactor through a feed pump;

c) The biogas slurry oxidation device is a biogas slurry oxidation pond, one end of the biogas slurry oxidation pond is a biogas slurry feed port, the other end is an oxidized biogas slurry discharge port, and the biogas slurry feed port of the biogas slurry oxidation pond Up and down misaligned baffle baffles are provided between the outlet of the oxidized biogas slurry, and the baffle baffles at least divide the biogas slurry oxidation tank into three oxidation zones. The gas outlet is a microporous aeration head, and the microporous aeration head is distributed at the bottom of each oxidation zone; the biogas slurry feed port communicates with the biogas slurry overflow port of the anaerobic digestion reactor, and is oxidized The biogas slurry outlet is connected with the reuse inlet of the oxidized biogas slurry of the hydrolysis acidification solution;

d) The volume ratio of the hydrolytic acidification tank, anaerobic digestion reactor and biogas slurry oxidation tank is 2-5:1:0.2-0.5.

In the utility model, the feeding port of the anaerobic digestion reactor is 50 cm away from the bottom of the reactor, and a blade stirrer is arranged in the anaerobic digestion reactor.

In the present utility model, the depth of the biogas slurry oxidation pond does not exceed 1000mm; in the biogas slurry oxidation device, the oxidation zone located at one end of the biogas slurry feed port is the first oxidation zone, and at least one microporous aeration head is located in the first bottom of the oxidation zone.

In the utility model, the hydrolytic acidification reaction pool is composed of 2 to 6 parallel hydrolytic acidification basic units.

In the utility model, the outlet of the hydrolysis and acidification solution of the hydrolysis acidification reaction tank is higher than the design liquid level of the maximum capacity of the collection tank of the hydrolysis solution collection tank, and the outlet of the oxidized biogas slurry in the biogas slurry oxidation tank is higher than the hydrolysis solution outlet. The reuse inlet of the biogas slurry after oxidation in the acidification pond.

In the utility model, the hydrolyzate collection pool is placed underground.

In the utility model, the hydrolysis and acidification solution is placed underground.

In the present utility model, the hydrolytic acidification reaction pond and the biogas slurry oxidation pond are both arranged underground or on the ground, and the oxidized biogas liquor outlet of the biogas liquor oxidation pond and the reuse inlet of the oxidized biogas liquor of the hydrolysis acidification liquid They are equipped with pressure pumps to communicate with each other.

In the utility model, the separated two-phase anaerobic fermentation device also includes a biogas treatment device, and the biogas treatment device is composed of a biogas storage tank, a dehydration tower, a desulfurization tower, and a biogas booster. The gas tank is connected to the biogas output port of the anaerobic digestion reactor, and after the biogas storage tank, dehydration tower, and desulfurization tower are connected in series, the biogas booster is connected to the biogas user.

The utility model has the advantages of adopting a separate two-phase anaerobic fermentation device to separate the two processes of substrate hydrolysis and acidification and anaerobic fermentation to produce biogas, wherein the hydrolysis and acidification process is completed in an open pool, which is convenient for feeding and discharging materials at any time. And it can adapt to the processing needs of substrates with different physical properties; after the hydrolyzate enters the anaerobic digestion reactor, a certain amount of aerobic bacteria can be brought into it to quickly consume the oxygen in the reactor, thus not affecting its anaerobic environment; After anaerobic digestion, the biogas slurry is filtered to remove a large amount of impurities to prevent the blockage of subsequent pipelines and biogas slurry oxidation tanks; after the biogas slurry enters the oxidation tank, it is aerated and oxygenated to make methanogenic bacteria contact Oxygen is basically killed, thereby reducing the risk of methane leakage due to the return of biogas slurry to the hydrolysis acidification pond.

Compared with similar technologies, the overall technical performance index of the utility model has the advantages that the hydrolytic acidification tank is open, the operation of feeding and discharging materials is simple, and the materials can be fed at any time, which is better adapted to the uncertainty of the types and quantities of rural wastes. The hydrolytic acidification tank is not closed, which reduces the project cost; second, the biogas slurry after anaerobic digestion is filtered to remove a large amount of impurities, preventing the blockage of subsequent pipelines and biogas slurry oxidation tank; Third, after the biogas slurry enters the oxidation pond, it is aerated and oxygenated, so that the methanogenic bacteria are basically killed due to exposure to oxygen, thereby reducing the risk of methane leakage caused by the return of the biogas slurry to the hydrolysis acidification pond; , easy maintenance and management.

Description of drawings

Fig. 1 is the schematic diagram of the embodiment of the utility model;

Figure 2 is a schematic diagram of the structure of the biogas slurry oxidation pond.

In the figure: 1. Hydrolysis and acidification reaction tank; 2. Fixing bolts; 3. Fence cover; 4. Hydrolysis and acidification solution outlet; 5. Hydrolysis solution collection tank; 6. Feed pump; 7. Anaerobic digestion reactor; 8 , feed inlet; 9, biogas slurry overflow port; 10, motor; 11, blade agitator; 12, biogas output port; 13, filter; 14, biogas slurry oxidation pond; 15, aeration device; 16, micro Hole aeration head; 17. Baffle plate; 18. Oxidized biogas slurry outlet; 19. Biogas slurry reuse inlet; 20. Biogas storage tank; 21. Dehydration tower; 22. Desulfurization tower; 23. Biogas booster.

Detailed ways

The accompanying drawings disclose the specific structure of the embodiment of the utility model without limitation, and the present embodiment will be further described below in conjunction with the accompanying drawings.

It can be seen from Figure 1 and Figure 2 that the separated two-phase anaerobic fermentation fermentation device includes a hydrolysis acidification reaction device, anaerobic fermentation device and biogas slurry oxidation device, in which:

The hydrolysis acidification reaction device includes 2 to 6 parallel hydrolysis acidification basic units of hydrolysis acidification reaction tank 1 and hydrolyzate collection tank 5, each basic unit is an open material accumulation tank, and the material accumulation tank is equipped with a hydrolysis acidification liquid outlet 4 and the reuse inlet 19 of the biogas slurry after oxidation. The outlet 4 of the hydrolysis acidification solution is located at the bottom of the material accumulation tank and communicates with the collection tank 5 of the hydrolysis solution. The outlet 4 of the hydrolysis acidification solution and the biogas slurry after oxidation The reuse inlet 19 is provided with an independent control valve; the upper part of each basic unit is equipped with an independent fence cover 3, and is fixed by a fixing bolt 2, and each basic unit is equipped with an independent rainproof shed (not shown in the figure). shown); the reuse inlet 19 of the oxidized biogas slurry is higher than or equal to the installation position of the fence cover plate 3 .

The anaerobic fermentation device is a closed anaerobic digestion reactor 7, the bottom of the anaerobic digestion reactor 7 is provided with a feed port 8, and the top of the anaerobic digestion reactor is provided with a biogas output port 12, and the anaerobic digestion reactor 0.8～ A biogas slurry overflow port 9 is provided at a height of 0.9, and the biogas slurry overflow port 9 is equipped with a filter device 13; the hydrolyzate collection tank 5 communicates with the feed port 8 of the anaerobic digestion reactor 7 through the feed pump 6.

The biogas slurry oxidation device is a biogas slurry oxidation pond 14, one end of the biogas slurry oxidation pond 14 is a biogas slurry inlet, and the other end is an oxidized biogas slurry outlet, from the biogas slurry inlet of the biogas slurry oxidation pond to the oxidized Between the biogas slurry outlets 18, there is a baffle baffle 17 that is dislocated up and down. The baffle baffle 17 divides the biogas slurry oxidation tank into three oxidation zones at least. The biogas slurry oxidation tank is equipped with an aeration device 15 to The gas outlet of the device 15 is a microporous aeration head 16, and the microporous aeration head is located at the bottom of the oxidation zone; the biogas slurry feed port communicates with the biogas slurry overflow port 9 of the anaerobic digestion reactor, The oxidized biogas slurry outlet 18 is connected to the reuse inlet 19 of the oxidized biogas slurry of the hydrolysis acidification solution 1 .

In this embodiment, the feed port 8 of the anaerobic digestion reactor 7 is 50 cm away from the bottom of the reactor, and the anaerobic digestion reactor 7 is provided with a blade agitator 11, and the driving motor 10 of the blade agitator 11 is located at the bottom of the anaerobic digestion reaction. Device 7 top center. The oxidation zone located at one end of the biogas slurry feed port in the biogas slurry oxidation tank 14 is the first oxidation zone, and at least one microporous aeration head 16 is located at the bottom of the first oxidation zone, and can also be located at the bottom of each oxidation zone according to actual conditions. Multi-point arrangement at the bottom.

In this embodiment, the hydrolytic acidification reaction tank 1 is composed of three parallel hydrolytic acidification basic units, and the baffle plate 17 divides the biogas slurry oxidation tank into four oxidation zones.

In this embodiment, the biogas treatment device is composed of a biogas storage tank 20, a dehydration tower 21, a desulfurization tower 22, and a biogas booster 23. The biogas storage tank 20 and the biogas output port of the anaerobic digestion reactor 7 12 connection, the biogas storage tank 20, the dehydration tower 21, and the desulfurization tower 22 are sequentially connected in series, and the biogas booster 23 is connected to the biogas user.

During specific implementation, the depth of the biogas slurry oxidation pond 14 does not exceed 1000mm, and the volume ratio of the hydrolytic acidification pond 1, the anaerobic digestion reactor 7, and the biogas slurry oxidation pond 14 is 2-5:1:0.2-0.5.

During specific implementation, the hydrolytic acidification solution outlet 4 of the hydrolysis acidification reaction tank 1 is higher than the design liquid level of the maximum capacity of the collection tank of the hydrolyzed solution collection tank 5, and the oxidized biogas slurry outlet 18 of the biogas slurry oxidation tank 14 The reuse inlet 19 of the oxidized biogas liquid higher than the hydrolytic acidification liquid tank 1 flows into the hydrolytic acidification reaction tank 1 by relying on the water level difference. On this premise, the hydrolyzed solution collection tank 5 can be placed underground, or both the hydrolyzed acidification solution 1 and the hydrolyzed solution collected tank 5 can be placed underground.

During specific implementation, the hydrolytic acidification reaction tank 1 and the biogas slurry oxidation tank 14 can also be arranged underground or on the ground, and the oxidized biogas slurry outlet 18 of the biogas slurry oxidation tank 14 and the oxidation of the hydrolytic acidification solution 1 The biogas slurry reuse inlets 19 communicate with each other through pressure pumps.

The operation process of the utility model is: first prepare the aerobic activated sludge required by the hydrolysis acidification tank 1 and the anaerobic activated sludge required by the anaerobic fermentation tank 7, wherein the aerobic activated sludge adopts the aerobic activated sludge of the sewage treatment plant Activated sludge is mixed with fresh cow dung (mass ratio is 5-10:1), aerated and oxygenated at intervals of two weeks for use, while anaerobic activated sludge can be directly collected from biogas residues and biogas fluids that are running well. The amount of addition is to maintain the concentration in the reactor 7 at about 5kgVS·m ^-3 (that is, the mixed solution contains about 5 kg of volatile organic compounds per cubic meter). The sludge adapts to the characteristics of the raw materials to be treated, so that granular sludge with good digestion performance (that is, microbial flora with good sedimentation performance) is formed in the sludge. This process is usually called the start-up stage or sludge domestication stage of the anaerobic fermentation process. , the general cycle is 15-45 days. After the above preparatory work is completed, start to add rural waste and aerobic sludge into the first grid of hydrolysis acidification tank 1 in sequence, and the amount of aerobic activated sludge added is according to waste: sludge (dry matter ratio) is 1: 0.2-0.5 (can be determined according to the amount of rural waste to be treated), add materials to the second cell according to the same method every 1 to 2 days, and then add materials to the third cell according to the same method at an interval of 1 to 2 days …continue to add items to each subsequent grid in turn, until the last grid. Then add water and soak for at least 1-2 days, open the valve of the hydrolysis acidification outlet 4 of the first grid in the hydrolysis acidification tank 1, so that the hydrolyzate flows into the collection tank 5, and then it is taken from the hydrolyzate feed port by the lift pump 6 8 is pumped into the anaerobic digestion reactor 7, and the digested biogas slurry flows out through the biogas slurry overflow port 9 at the same time, and the hydrolyzate feed port 8 and the biogas slurry overflow port 9 are closed after feeding and discharging, and the motor 10 is turned on to drive Blade mixer 11, the rotating speed of blade is lower than 30 revs/min, so that the material in the reactor 7 is fully mixed, can open motor 2-3 times every day, no more than 10 minutes each time. Open the valve of the hydrolyzed water outlet 4 of the second grid in the hydrolyzed acidification tank 1, so that the hydrolyzed liquid flows into the collecting tank 5, and then it is pumped into the anaerobic digestion reactor 7 from the hydrolyzed liquid feed port 8 by the lift pump 6 , and open the valve of the biogas slurry overflow port 9 at the same time, after the biogas slurry flows out through the biogas slurry overflow port 9, the suspended matter is removed by the filter 13 and then flows into the biogas slurry oxidation pond 14, and first passes through the aeration device 15 (such as Aeration and oxygenation machine) and microporous aeration head 16 are oxygenated, so that the remaining methanogens in the biogas slurry are contacted with oxygen to be killed, and through the circuitous baffle plate 17, reach the Use for purification purposes. And the material in the hydrolytic acidification tank 1 is because a large amount of hydrolyzate is drawn out and causes the water level to drop, the canopy on the top of the hydrolysis acidification tank 1 can be opened, and the waste material that has been hydrolyzed in the first grid of the hydrolysis acidification tank 1 can be cleaned out manually or mechanically (through draining treatment), add a certain amount of rural waste, and then open the valve between the purified biogas slurry outlet 18 and the biogas slurry reuse inlet 19, so that the digested biogas slurry can be reused to make up for the previous hydrolysis and acidification tank 1 first However, the biogas slurry here is basically free of methanogens after pre-oxidation treatment, so methane will basically not be produced in the first cell of the hydrolytic acidification tank 1, thereby avoiding methane leakage. It can be seen that during the whole working process, only one compartment in the hydrolytic acidification tank 1 is cleaning and adding materials, one compartment is providing hydrolytic acidification solution, and the other compartments are in the alternate working state of hydrolysis and acidification reaction, and the hydrolysis and acidification solutions of each compartment are in sequence They enter the anaerobic digestion reactor 7 successively at intervals, and the biogas slurry containing anaerobic bacteria is treated in the biogas slurry oxidation pond 14 and then introduced into the corresponding grid of the newly added material in the hydrolysis acidification pond 1 .

The hydrolyzed and acidified materials taken out from each compartment of the hydrolyzed acidified tank 1 can also be continuously used as raw materials for organic fertilizer or matrix production, and zero discharge of biogas slurry can also be realized in the whole system.

The embodiment that realizes recycling from the above only takes the hydrolytic acidification tank 1 and the hydrolyzed solution into the collection tank 5 as the underground type, while the anaerobic digestion reactor 7 and the biogas slurry oxidation tank 14 are all above-ground types. Rely on the gravity flow of the liquid, if the anaerobic digestion reactor 7, the biogas slurry oxidation pond 14, the hydrolysis acidification pond 1 and the hydrolyzate into the collection pond 5 are restricted by the environment, and the liquid cannot achieve gravity flow during work, then a pressure pump is required to force the liquid Observe the specific flow direction of the utility model.

Claims (9)

1. A separate two-phase anaerobic fermentation fermentation device, characterized in that: comprising hydrolytic acidification reaction device, anaerobic fermentation device and biogas slurry oxidation device, wherein: a) The hydrolytic acidification reaction device includes at least two parallel hydrolytic acidification reaction tanks and hydrolyzed liquid collection tanks, each basic unit is an open material storage tank, and the material storage tank is equipped with hydrolytic acidification liquid outlet and the reuse inlet of the oxidized biogas slurry, the outlet of the hydrolysis and acidification solution is located at the bottom of the material accumulation tank, and communicates with the hydrolysis solution collection tank, the outlet of the hydrolysis and acidification solution and the reuse inlet of the oxidized biogas slurry Each is equipped with an independent control valve; the upper part of each basic unit is equipped with an independent fence cover, and each basic unit is equipped with an independent rainproof shed; the reuse inlet of the oxidized biogas slurry is higher than or equal to The installation location of the fence cover; b) The anaerobic fermentation device is a closed anaerobic digestion reactor, the bottom of the anaerobic digestion reactor is provided with a feed inlet, and the top of the anaerobic digestion reactor is provided with a biogas output port. There is a biogas slurry overflow port at 80%-90% of the height, and the biogas slurry overflow port is equipped with a filter device; the hydrolyzate collection tank communicates with the feed port of the anaerobic digestion reactor through a feed pump; c) The biogas slurry oxidation device is a biogas slurry oxidation pond, one end of the biogas slurry oxidation pond is a biogas slurry feed port, the other end is an oxidized biogas slurry discharge port, and the biogas slurry feed port of the biogas slurry oxidation pond Up and down misaligned baffle baffles are provided between the outlet of the oxidized biogas slurry, and the baffle baffles at least divide the biogas slurry oxidation tank into three oxidation zones. The gas outlet is a microporous aeration head, and the microporous aeration head is distributed at the bottom of each oxidation zone; the biogas slurry feed port communicates with the biogas slurry overflow port of the anaerobic digestion reactor, and is oxidized The biogas slurry outlet is connected with the reuse inlet of the oxidized biogas slurry of the hydrolysis acidification solution; d) The volume ratio of the hydrolytic acidification tank, anaerobic digestion reactor and biogas slurry oxidation tank is 2-5:1:0.2-0.5. 2. The separated two-phase anaerobic fermentation fermentation device according to claim 1, characterized in that: the feed port of the anaerobic digestion reactor is 50 cm away from the bottom of the reactor, and the anaerobic digestion reactor is provided with a blade agitator. 3. The separated two-phase anaerobic fermentation device according to claim 1, characterized in that: the depth of the biogas slurry oxidation tank is not more than 1000mm; The zone is the first oxidation zone, and at least one microporous aeration head is located at the bottom of the first oxidation zone. 4. The separated two-phase anaerobic fermentation device according to claim 1, characterized in that: the hydrolytic acidification reaction tank is composed of 2 to 6 parallel hydrolytic acidification basic units. 5. The separated two-phase anaerobic fermentation fermentation device according to any one of claims 1 to 4, characterized in that: the outlet of the hydrolysis and acidification solution in the hydrolysis acidification reaction tank is higher than the maximum capacity of the collection tank of the hydrolyzate collection tank The design liquid level of the amount, the outlet of the oxidized biogas slurry in the biogas slurry oxidation tank is higher than the reuse inlet of the oxidized biogas slurry in the hydrolysis acidification tank. 6. The separated two-phase anaerobic fermentation fermentation device according to claim 5, characterized in that: the hydrolyzate collection pool is placed underground. 7. The separated two-phase anaerobic fermentation fermentation device according to claim 5, characterized in that: the hydrolysis and acidification solution is placed underground. 8. The separated two-phase anaerobic fermentation fermentation device according to any one of claims 1 to 4, characterized in that: the hydrolytic acidification reaction pool and the biogas slurry oxidation pool are both installed underground or on the ground, and the biogas slurry oxidation pool The outlet of the oxidized biogas slurry and the reuse inlet of the oxidized biogas slurry of the hydrolysis acidification solution are equipped with pressure pumps to communicate with each other. 9. The separated two-phase anaerobic fermentation and fermentation device according to any one of claims 1 to 4, characterized in that: the separated two-phase anaerobic fermentation and fermentation device also includes a biogas treatment device, and the biogas treatment The device consists of a biogas storage tank, a dehydration tower, a desulfurization tower, and a biogas booster. The biogas storage tank is connected to the biogas output port of the anaerobic digestion reactor. After the biogas storage tank, dehydration tower, and desulfurization tower are connected in series, The biogas booster is connected with biogas users.

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