CN112094014A - Breeding manure membrane grading biochemical treatment system and process - Google Patents
Breeding manure membrane grading biochemical treatment system and process Download PDFInfo
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- CN112094014A CN112094014A CN202010965263.1A CN202010965263A CN112094014A CN 112094014 A CN112094014 A CN 112094014A CN 202010965263 A CN202010965263 A CN 202010965263A CN 112094014 A CN112094014 A CN 112094014A
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- anaerobic tank
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- 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
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- 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
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/20—Nature of the water, waste water, sewage or sludge to be treated from animal husbandry
Abstract
The invention provides a graded biochemical treatment system and a graded biochemical treatment process for culture manure sewage membranes, which comprise a primary black membrane anaerobic tank and a secondary black membrane anaerobic tank, wherein the primary black membrane anaerobic tank is positioned in the secondary black membrane anaerobic tank, a common membrane top is arranged on a first black membrane anaerobic tank and the secondary black membrane anaerobic tank, the primary black membrane anaerobic tank is communicated with a sewage discharge pipeline of a culture farm, the primary black membrane anaerobic tank is communicated with the secondary black membrane anaerobic tank through an overflow pipe, a heating pipe is arranged in the primary black membrane anaerobic tank, and a sludge discharge pipe is arranged at the bottom of the primary black membrane anaerobic tank. The invention has the beneficial effects that: reasonable design, simple structure, safety and reliability, and can solve the problems of difficult operation in winter, difficult slag discharge of the methane tank and large odor emission in cold areas.
Description
Technical Field
The invention relates to the field of livestock breeding, in particular to a system and a process for graded biochemical treatment of breeding manure and a sewage film.
Background
The livestock and poultry breeding industry is rapidly developed at present, large-scale farms are constructed in the whole country of each large breeding group, horse race areas are constructed, in order to solve the problem of excrement of the farms, sewage treatment systems are correspondingly constructed, and the current typical process is as follows: the sewage treatment method comprises the following steps of solid-liquid separation, UASB + AO + oxidation pond, USR (CSTR) + solid-liquid separation + oxidation pond, solid-liquid separation + membrane anaerobic pond + oxidation pond, wherein the above processes correspond to different sewage treatment standards, the effluent concentration of the 3 rd treatment process is the highest, and the corresponding biogas slurry returning standard is adopted.
The office hall of the rural agricultural department and the office hall of the ecological environment department jointly issue a 'notice (No. 2020/23) about further clarifying the requirement of strengthening the cultivation pollution supervision of livestock and poultry manure returning utilization', the file clears up the channel of biogas slurry returning, emphasizes the requirement of harmless treatment, and plays an active guiding role in the popularization of the technology for treating cultivation manure by membrane biogas.
At present, because of the characteristic that the membrane methane tank is not suitable for heat preservation, the membrane methane tank is difficult to normally operate in winter in cold areas of China, the large bottom area of the membrane methane tank causes difficult slag discharge of all the membrane methane tanks, and because of unreasonable process design, odor is greatly emitted to influence the environment, the construction investment and the operation cost of deodorization equipment facilities are increased, if the membrane methane tank project cannot normally operate, the effluent concentration of the membrane methane tank directly exceeds the harmless standard emphasized by agriculture and animal husbandry [ 2020 ] No. 23 ], and the pollution is caused to the agricultural environment, underground water and atmosphere.
How to solve the above technical problems is the subject of the present invention.
Disclosure of Invention
In order to solve the defects of the prior art, the invention provides the culture manure and sewage membrane grading biochemical treatment system and the process, which have reasonable design, simple structure, safety and reliability and can solve the problems of difficult operation in winter, difficult slag discharge of a methane tank and large odor emission in cold areas.
The technical scheme adopted by the invention for solving the technical problems is as follows: the invention provides a graded biochemical treatment system for a culture manure and sewage membrane, which comprises a primary black membrane anaerobic tank and a secondary black membrane anaerobic tank, wherein the primary black membrane anaerobic tank is positioned in the secondary black membrane anaerobic tank, the water temperature in the secondary black membrane anaerobic tank is obviously higher than the ambient temperature in winter, and the primary black membrane anaerobic tank is wrapped outside the primary black membrane anaerobic tank, so that a heat insulation barrier is formed for the primary black membrane anaerobic tank, the higher-temperature fermentation of the primary black membrane anaerobic tank is favorably maintained, and the higher fermentation efficiency is ensured.
The first black film anaerobic tank and the second black film anaerobic tank are provided with a common film top.
The first-stage black film anaerobic tank is communicated with a sewage pipeline of a farm, and the first-stage black film anaerobic tank is communicated with the second-stage black film anaerobic tank through an overflow pipe.
A heating pipe is arranged in the primary black film anaerobic tank;
and a sludge discharge pipe is arranged at the bottom of the primary black film anaerobic tank.
The sludge discharge pipe is communicated with a solid-liquid separator, and the liquid output end of the solid-liquid separator is communicated with the oxidation pond.
The primary black film anaerobic tank is internally provided with a self-circulation pipeline, microorganisms such as methane bacteria and the like are attached to sludge, the supernatant is pumped into the sludge by the self-circulation pipeline, the contact chance of pollutant nutrients to be decomposed of sewage and bacterial microorganisms is increased, the degradation of organic pollutants can be effectively promoted, and methane is generated;
the output end of the secondary black film anaerobic tank is communicated with the oxidation pond.
The excrement from the farm does not need any separation treatment, directly enters the primary membrane anaerobic tank in a closed mode for fermentation treatment, and any odor can be prevented from being emitted in the process.
The self-circulation pipeline in the primary membrane anaerobic tank squeezes supernatant into sludge attached with microorganisms such as methane bacteria and the like to promote degradation of organic pollutants and generate methane, and meanwhile, the heating pipeline in the primary black membrane anaerobic tank heats the sludge, so that concentrated heating and stirring are performed, the digestion efficiency of newly-fed excrement is improved, the water outlet concentration is reduced, and the bottom area of the primary black membrane anaerobic tank is far smaller than the sum of the bottom areas of the primary black membrane anaerobic tank and the secondary black membrane anaerobic tank, so that the raw materials in the primary black membrane anaerobic tank are heated, stirred and discharged far more than that of a membrane methane tank with a non-hierarchical design.
The sludge in the primary black film anaerobic tank is discharged through a sludge discharge pipe and then enters a solid-liquid separator for solid-liquid separation treatment, the dry biogas residues separated from the solid output end of the solid-liquid separator are subjected to anaerobic digestion, harmful substances such as germs, roundworm eggs and wigglers contained in the dry biogas residues are killed, the harmless requirement of returning the biogas residues to the field is met, the dry biogas residues are directly returned to the field for utilization, and the biogas slurry separated from the liquid output end flows into an oxidation pond for oxidative degradation and returning the biogas slurry to the field for utilization.
The biogas slurry in the primary membrane anaerobic tank overflows to the secondary black membrane anaerobic tank through an overflow pipe for fermentation, and the biogas slurry fermented in the secondary black membrane anaerobic tank overflows into an oxidation pond for degradation and is finally returned to the field for utilization.
Biogas formed in the primary black film anaerobic tank and the secondary black film anaerobic tank is collected through a common gas collecting film top, and is supplied to a boiler and other equipment for combustion and utilization after purification, and odorous sulfur compounds in the excrement are metabolized into hydrogen sulfide and purified and removed through a closed pipeline along with the generated biogas.
The invention has the beneficial effects that: according to the process, suspended matters and sludge in the excrement are intercepted from the inside of the first-stage black film anaerobic tank with a small volume, the concentration of raw materials in the excrement is improved, then the first-stage black film anaerobic tank is heated in a centralized manner, heat is intensively acted on high-concentration newly-fed excrement, the situation that water which does not produce gas and fermented materials are heated completely as in a conventional process is avoided, the high activity of methane bacteria is ensured, the decomposition and curing degree of the excrement is improved, and the concentration of discharged water and the retention time are reduced;
the primary black film anaerobic tank with high activated sludge concentration is beneficial to full contact between newly-fed excrement and methane strains, ensures effective mass transfer and is beneficial to fermentation by using the excrement;
the area of the bottom of the first-stage black-film anaerobic tank with smaller tank capacity is smaller, so that the arrangement of sludge discharge pipe openings can be reduced in a large area, the sludge discharge efficiency is improved, and the probability of blockage failure of a sludge discharge pipe is reduced;
in addition, suspended matters in the excrement are completely intercepted in the primary black film anaerobic tank, so that floating slag formed on the surface of all anaerobic tanks in the conventional process is avoided, and therefore, the excrement can directly enter the primary tank for fermentation without being subjected to solid-liquid separation treatment, all process engineering is carried out in a closed environment, odor emission is avoided, meanwhile, investment of an adjusting tank and auxiliary stirring, pumping and deodorizing equipment of the adjusting tank is also avoided, and construction and operation cost is effectively saved.
Drawings
FIG. 1 is a top view of an anaerobic tank of the present invention.
FIG. 2 is a front sectional view of the anaerobic tank of the present invention.
FIG. 3 is a process flow diagram of the present invention.
Wherein the reference numerals are: 1. a first-stage black film anaerobic tank; 101. an overflow pipe; 102. heating the pipeline; 103. a sludge discharge pipe; 104. a self-circulating pipe; 2. a second-stage black film anaerobic tank; 3. a solid-liquid separator; 4. an oxidation pond.
Detailed Description
Technical characteristics of the scheme can be clearly explained, and the scheme is explained through a specific implementation mode.
Referring to fig. 1 to 3, the present embodiment is a system for performing a graded biochemical treatment on a membrane of a breeding manure, including a first-stage black-membrane anaerobic tank 1 and a second-stage black-membrane anaerobic tank 2, wherein the first-stage black-membrane anaerobic tank 1 is located in the second-stage black-membrane anaerobic tank 2, and the water temperature in the second-stage black-membrane anaerobic tank 2 is significantly higher than the ambient temperature in winter, and is wrapped outside the first-stage black-membrane anaerobic tank 1, so that a heat preservation barrier is formed for the first-stage black-membrane anaerobic tank 1, which is beneficial to maintaining the higher temperature fermentation of the first-stage black-membrane anaerobic tank 1.
The first black film anaerobic tank 1 and the second black film anaerobic tank 2 are provided with a common film top.
The first-stage black film anaerobic tank 1 is communicated with a sewage pipeline of a farm, and the first-stage black film anaerobic tank 1 is communicated with the second-stage black film anaerobic tank 2 through an overflow pipe 101.
A heating pipe 102 is arranged in the primary black film anaerobic tank 1;
the bottom of the first-stage black film anaerobic tank 1 is provided with a sludge discharge pipe 103.
The sludge discharge pipe 103 is communicated with a solid-liquid separator 3, and the liquid output end of the solid-liquid separator 3 is communicated with an oxidation pond 4.
A self-circulation pipeline 104 is arranged in the primary black film anaerobic tank 1, microorganisms such as methane bacteria and the like are attached to sludge, the supernatant is pumped into the sludge by the self-circulation pipeline 104, the contact chance of pollutant nutrients to be decomposed of the sewage and bacterial microorganisms is increased, the degradation of organic pollutants can be effectively promoted, and methane is generated;
the output end of the secondary black film anaerobic tank 2 is communicated with an oxidation pond 4.
The excrement that comes from the plant need not any separation processing, directly gets into one-level membrane anaerobism pond 1 with airtight mode and carries out fermentation treatment, any smell can be avoided in this process and gives off, because the velocity of flow changes, mud deposit in one-level membrane anaerobism pond 1 bottom of the pool, one grade two grade pond black membrane anaerobism bottom of the pool does not communicate, sewage passes through overflow pipe 101 overflow and gets into second grade black membrane anaerobism pond 2, make whole mud deposit in one-level pond, the dwell time of excrement in one-level black membrane anaerobism pond 1 is T1: 5 d-15 d, wherein the retention time T2 of the excrement in the secondary black film anaerobic tank 2 is as follows: 20 d-45 d, the total residence time T = T1+ T2=25 d-70 d, the tank volume V = T × Q, Q is the manure flow rate (m year/d), V1= T1 × Q, V2= T2 × Q, and V2> V1.
The self-circulation pipeline 104 in the first-level membrane anaerobic tank 1 squeezes supernatant into sludge attached with microorganisms such as methane bacteria and the like, organic pollutants are promoted to be degraded, methane is generated, meanwhile, the heating pipeline 102 in the first-level black membrane anaerobic tank 1 is used for heating the sludge, the sludge is heated and stirred in a centralized manner, the digestion efficiency of newly-entered excrement is improved, the water outlet concentration is reduced, and the bottom area of the first-level black membrane anaerobic tank 1 is far smaller than the sum of the bottom areas of the first-level black membrane anaerobic tanks, so that the raw materials in the first-level black membrane anaerobic tank 1 are heated, stirred and the discharge efficiency is far higher than that of a membrane methane tank which is not designed in a grading manner.
The sludge in the primary black film anaerobic tank 1 is discharged through a sludge discharge pipe 103 and then enters a solid-liquid separator 3 for solid-liquid separation treatment, the biogas residues separated by the solid output end of the solid-liquid separator 3 are directly returned to the field for utilization, and the biogas slurry separated by the liquid output end flows into an oxidation pond 4 for oxidative degradation and returning to the field for utilization.
The biogas slurry in the primary membrane anaerobic tank 1 overflows to the secondary black membrane anaerobic tank 2 through the overflow pipe 101 for fermentation, and the biogas slurry fermented in the secondary black membrane anaerobic tank 2 overflows into the oxidation pond 4 for degradation and is finally returned to the field for utilization.
Biogas formed in the primary black film anaerobic tank 1 and the secondary black film anaerobic tank 2 is collected through a common gas collecting film top, and is purified and then is supplied to a boiler and other equipment for combustion and utilization.
Designing and inputting:
quality of manure inlet water in pig farm (330 m/d)
| Index (I) | CODc（mg/L） | BOD5（mg/L） | NH3-（mg/L） | TP（mg/L） | pH | SS（mg/L） |
| Numerical value | ≥15000 | ≥8000 | ≥1000 | ≥200 | 6-9 | ≥10000 |
The requirement of effluent parameters of an oxidation pond 4
| Serial number | Item | Parameter(s) |
| 1 | pH | 5-8 |
| 2 | Settlement rate of ascarid eggs | ≥95% |
| 3 | Fecal coliform population | 100 pieces/g (ml) |
| 4 | Eggs of schistosomulum and hookworm | There should be no viable eggs of schistosomulum and hookworm |
| 5 | Mosquito and fly | Effectively controlling the breeding of mosquitoes and flies, no wigglers in the biogas slurry, no live maggots, pupas or newly emerged adult flies around the pond |
Note: the effluent index should reach GB/T25246-
Designing, calculating and outputting:
pig farm manure amount Q: 330m, carrying out rectification;
the whole fermentation period T: 45d, and a step of cooling;
all the tank volumes V: conducting a qt =330 × 45=14850m heavy harvest;
taking the residence time T1 of the first-stage black film anaerobic tank 1: 7d, the retention time of the secondary black film anaerobic tank 2 is 38 d;
c, carrying out high-grade fertilization in a first black membrane anaerobic pond with the capacity of V1=330 × 7=2310m, and carrying out high-grade fertilization in a second black membrane anaerobic pond with the capacity of V2=330 × 38=12540 m;
and (3) selecting the pool depth: the depth of the first-stage black film anaerobic pool 1 is H1=10m, and the depth of the second-stage black film anaerobic pool 2 is H2=5 m;
calculating the area of the pool bottom: the first-level black film anaerobic tank has 1 bottom S1=2310/10=231 square meters, and the second-level black film anaerobic tank has 2 bottom S2=12540/5=2508 square meters.
The common membrane biogas project of the project without adopting the design scheme
Designing, calculating and outputting:
all the tank volumes V: qxt =330 × 45=14850m (non-hierarchical design)
And (3) selecting the pool depth: pool depth H =5m
Calculating the area of the pool bottom: pool bottom S =14580/5=2916 square meter
And (3) comparison shows that:
| key contrast terms | Technical scheme of the invention | Other technical schemes are commonly used | Description of the preferred embodiments |
| Mud discharging surface at pool bottom Product of large quantities | 231 square meter centralized mud discharge | 2916 square meter full-pool mud discharge | S1 <<S2 sludge deposition is very concentrated, which is beneficial to the mixing and contact of the newly-fed raw material and the sludge discharge And (4) placing. |
| Top radiating surface Product of large quantities | High-temperature square meter 231 | Whole cell membrane roof 2916 square meter | The scheme of the patent not only reduces the heat dissipation area in a large range, but also can utilize the secondary pool body to form a primary protection structure A temperature barrier. |
| Fermentation tank container | High efficiency 2310m Stent, the rest two stages Fermentation of | High-efficiency full-pond 14850m cultivation Tank capacity part, full tank state Uniformity | The graded design does not influence the 45d fermentation stop of the whole periodThe time is kept, but the high-efficiency centralized heating can be realized, and the heat is kept High temperature fermentation state. Due to V1<<V, the centralized heating rate is much higher than that of the whole pool. |
| Feeding mode | Direct feeding, without the need for grates Pre-treating with solid-liquid separator | Requires a grid, stirring, solid-liquid Pretreatment such as separation | The former has no odor emission, and the latter pretreatment process belongs to open treatment and emits a large amount of odor. |
| After solid-liquid separation Treatment of | The separated biogas residue does not need to be continued Treatment of | The separated excrement residue needs to be continued Compost | The former is subjected to medium-high temperature anaerobic digestion and can directly reach the harmless standard, and the latter is not subjected to anaerobic digestion And (4) treating, and further composting. |
The technical features of the present invention which are not described in the above embodiments may be implemented by or using the prior art, and are not described herein again, of course, the above description is not intended to limit the present invention, and the present invention is not limited to the above examples, and variations, modifications, additions or substitutions which may be made by those skilled in the art within the spirit and scope of the present invention should also fall within the protection scope of the present invention.
Claims (8)
1. The system for the graded biochemical treatment of the culture manure sewage membrane is characterized by comprising a first-stage black membrane anaerobic tank (1) and a second-stage black membrane anaerobic tank (2), wherein the first-stage black membrane anaerobic tank (1) is positioned in the second-stage black membrane anaerobic tank (2), and a common membrane roof is arranged on the first-stage black membrane anaerobic tank (1) and the second-stage black membrane anaerobic tank (2);
the first-stage black film anaerobic tank (1) is communicated with a sewage discharge pipeline of a farm, and the first-stage black film anaerobic tank (1) is communicated with the second-stage black film anaerobic tank (2) through an overflow pipe (101).
2. The graded biochemical treatment system for the culture manure and sewage membrane as claimed in claim 1, wherein a heating pipe (102) is arranged in the primary black-membrane anaerobic tank (1);
and a sludge discharge pipe (103) is arranged at the bottom of the primary black film anaerobic tank (1).
3. The system for the graded biochemical treatment of the culture manure and sewage membrane according to the claim 2, characterized in that the sludge discharge pipe (103) is communicated with a solid-liquid separator (3), and the liquid output end of the solid-liquid separator (3) is communicated with an oxidation pond (4).
4. The graded biochemical treatment system for the culture manure and sewage membrane as claimed in claim 2, wherein a self-circulation pipeline (104) is arranged in the primary black-membrane anaerobic tank (1).
5. The system for the graded biochemical treatment of the culture manure and sewage membrane according to the claim 3, wherein the output end of the secondary black-film anaerobic tank (2) is communicated with the oxidation pond (4).
6. A process for the membrane-based biochemical treatment of the culture manure according to claim 1, wherein the manure discharged from the culture farm enters the primary membrane anaerobic tank (1) in a closed manner for fermentation treatment, the sludge is deposited on the bottom of the primary membrane anaerobic tank (1) due to the change of the flow rate, a self-circulation pipeline (104) in the primary membrane anaerobic tank (1) pumps the supernatant into the sludge attached with microorganisms such as methane bacteria and the like to promote the degradation of organic pollutants and generate biogas, and the sludge is heated through a heating pipeline (102) in the primary membrane anaerobic tank (1);
the sludge in the primary black film anaerobic tank (1) is discharged through a sludge discharge pipe (103) and then enters a solid-liquid separator (3) for solid-liquid separation treatment, biogas residues separated at a solid output end of the solid-liquid separator (3) are directly returned to the field for utilization, and biogas slurry separated at a liquid output end flows into an oxidation pond (4) for oxidative degradation and returning to the field for utilization.
7. The process of the system for the graded biochemical treatment of the culture manure and sewage membrane as claimed in claim 6, wherein the biogas slurry in the primary membrane anaerobic tank (1) overflows to the secondary black membrane anaerobic tank (2) through an overflow pipe (101) for fermentation, and the biogas slurry fermented in the secondary black membrane anaerobic tank (2) overflows into the oxidation pond (4) for degradation and finally is returned to the field for utilization.
8. The process of the system for the graded biochemical treatment of the culture manure membranes as claimed in claim 7, wherein the biogas formed in the primary black-film anaerobic tank (1) and the secondary black-film anaerobic tank (2) is collected by a common gas-collecting membrane roof and then discharged for utilization.
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| CN202010965263.1A CN112094014A (en) | 2020-09-15 | 2020-09-15 | Breeding manure membrane grading biochemical treatment system and process |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202945235U (en) * | 2012-11-29 | 2013-05-22 | 泰安东方沼气科技有限公司 | Socket-type underground secondary fermentation methane tank |
| KR20150127485A (en) * | 2014-05-07 | 2015-11-17 | 한국산업기술시험원 | Anaerobic digestion system for generating biogas |
| CN205473745U (en) * | 2016-01-15 | 2016-08-17 | 新疆佳禾环保工程建设有限公司 | Big -and -middle -sized methane -generating pit of tertiary anaerobism |
| CN108128894A (en) * | 2017-12-25 | 2018-06-08 | 山东省农业科学院农业资源与环境研究所 | A kind of milk cow and pig breeding farm waste low-cost high-efficiency fermentation process system |
-
2020
- 2020-09-15 CN CN202010965263.1A patent/CN112094014A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202945235U (en) * | 2012-11-29 | 2013-05-22 | 泰安东方沼气科技有限公司 | Socket-type underground secondary fermentation methane tank |
| KR20150127485A (en) * | 2014-05-07 | 2015-11-17 | 한국산업기술시험원 | Anaerobic digestion system for generating biogas |
| CN205473745U (en) * | 2016-01-15 | 2016-08-17 | 新疆佳禾环保工程建设有限公司 | Big -and -middle -sized methane -generating pit of tertiary anaerobism |
| CN108128894A (en) * | 2017-12-25 | 2018-06-08 | 山东省农业科学院农业资源与环境研究所 | A kind of milk cow and pig breeding farm waste low-cost high-efficiency fermentation process system |
Non-Patent Citations (1)
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| 段诚中: "《规模化养猪新技术》", 31 August 2000, 中国农业出版社 * |
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