CN108455724B - Anaerobic baffle plate reaction device and sewage treatment method - Google Patents
Anaerobic baffle plate reaction device and sewage treatment method Download PDFInfo
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- CN108455724B CN108455724B CN201810131900.8A CN201810131900A CN108455724B CN 108455724 B CN108455724 B CN 108455724B CN 201810131900 A CN201810131900 A CN 201810131900A CN 108455724 B CN108455724 B CN 108455724B
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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
- C02F3/284—Anaerobic digestion processes using anaerobic baffled reactors
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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
- C02F2201/00—Apparatus for treatment of water, waste water or sewage
- C02F2201/002—Construction details of the apparatus
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E50/00—Technologies for the production of fuel of non-fossil origin
- Y02E50/30—Fuel from waste, e.g. synthetic alcohol or diesel
Abstract
The invention discloses an anaerobic baffle plate reaction device and a sewage treatment method, wherein the anaerobic baffle plate reaction device comprises a reaction tank, a plurality of hydrolysis fermentation areas and methane generation areas which are positioned in the reaction tank and are separated by partition plates and baffle plates, a chemical energy power generation system and a solar heating system, wherein the chemical energy power generation system comprises a methane collector, a methane collection pipe, a methane preprocessor and a methane generator, and the methane generator is electrically connected with a water inlet pump; the solar heating system comprises a solar heat collecting plate, a heat collecting supply pipe, a heat storage water tank, a heat collecting supply pipe branch pipe and a heat preservation device. The invention utilizes the heat generated by solar energy to keep the temperature of the reaction device, and the electric energy generated by the power generation of chemical energy such as methane and the like is used for supplying power to the reaction device, thereby improving the reaction efficiency of the anaerobic baffle plate reaction device and solving the problems of high operation cost and high energy consumption of the traditional heat preservation device.
Description
Technical Field
The invention relates to an anaerobic baffle plate reaction device and a sewage treatment method, in particular to an anaerobic baffle plate reaction device and a sewage treatment method driven by solar heat preservation and chemical energy, which are used for treating sewage.
Background
The anaerobic baffle reaction tank is widely applied as a high-efficiency novel anaerobic sewage biological technology. The reaction tank is divided into a plurality of reaction chambers connected in series by using a series of baffle plates arranged vertically in the reaction tank, and each reaction chamber can be regarded as a relatively independent upflow sludge bed system. The sewage flows up and down along the baffle plate in the reaction tank and sequentially passes through the sludge bed of each reaction chamber, and high molecular organic substrates such as cellulose, starch, protein and the like in the wastewater are contacted with microorganisms and are decomposed into small molecules such as cellobiose, glucose, maltose, short peptide, amino acid and the like by bacterial extracellular enzyme in the hydrolysis and fermentation (acidification) stages and further converted into acetic acid, hydrogen, carbonic acid and new cell substances. In the methanogenic stage, acetic acid, hydrogen, carbonic acid, formic acid and methanol are converted to methane, carbon dioxide and new cellular material in methanogens. From the problems encountered in the operation process of the prior anaerobic baffle plate, the anaerobic baffle plate reaction tank can be further improved, so that the better separation of an acid production phase and a methane production phase of the anaerobic reaction is realized, and the problem of uniform distribution of inlet water is improved.
In addition, the anaerobic baffled reaction tank is generally slow in treatment process, and the temperature may affect the speed and degree of anaerobic degradation. According to research, the suitable temperature ranges of the anaerobic bacteria are about 35 ℃ at the middle temperature and 50-55 ℃ at the high temperature. However, the actual sewage and the sharp change and fluctuation of the external temperature are disadvantageous to the anaerobic process. Especially in northern areas, the temperature drops in cold winter, which severely affects the efficiency of the hydrolysis and methanogenesis processes. Therefore, the anaerobic treatment process is often heated and insulated by steam or other methods, the operation is complicated, and the energy consumption is increased. Solar energy is used as a green energy source and can be used for heat preservation of an anaerobic treatment process. In addition, the anaerobic biological treatment process is accompanied by the production of a large amount of biogas while removing a large amount of organic matter. And the methane in the biogas is a combustible gas and can be converted into electric energy to provide power for the operation of the reactor. No report has been made on attempts to improve the treatment efficiency of the improved anaerobic baffled reaction tank by using solar energy or methane chemical energy, whether in theoretical research or practical application.
Disclosure of Invention
The invention aims to solve the technical problem of providing an anaerobic baffle plate reaction device and a sewage treatment method, wherein the heat generated by solar energy is utilized to keep the temperature of the reaction device, and electric energy generated by power generation of chemical energy such as methane and the like is used for supplying power to the reaction device, so that the reaction efficiency of the anaerobic baffle plate reaction device is improved, and the problems of high operation cost and high energy consumption of the traditional heat preservation device are solved.
In order to solve the technical problem, the technical scheme adopted by the invention is as follows: an anaerobic baffle plate reaction device comprises a reaction tank, a plurality of hydrolysis fermentation areas and a methane generation area which are positioned in the reaction tank and are separated by partition plates and baffle plates, wherein the hydrolysis fermentation areas and the methane generation area are communicated in series and allow sewage to flow through one by one; the solar heating system comprises a solar heat collecting plate, a heat collecting supply pipe, a heat storage water tank, a heat collecting supply pipe branch pipe and a heat preservation device, wherein the heat preservation device is sleeved on the periphery of the reaction tank, the solar heat collecting plate is communicated with the heat storage water tank through the heat collecting supply pipe, and the heat storage water tank is communicated with the heat preservation device through the heat collecting supply pipe branch pipe.
The anaerobic baffle plate reaction device is characterized in that a stirring device is arranged in a hydrolysis fermentation area, and a driving motor of the stirring device is electrically connected with a biogas generator.
According to the anaerobic baffle plate reaction device, the biogas collector is a pointed top cover body with a thick bottom and a thin upper end, the bottom of the pointed top cover body is covered above the hydrolysis fermentation area and the methane production area, and the top point of the pointed top cover body is communicated with the biogas collecting pipe.
The anaerobic baffle plate reaction device comprises a hydrolysis fermentation area 1 and a hydrolysis fermentation area 2 which are separated by a first partition plate, wherein the first partition plate is provided with an air outlet slit a and a sludge return slit a, the air outlet slit a is positioned at the upper part of the sludge return slit a, the first partition plate positioned at the upper part of the air outlet slit a is connected with a first baffle plate which is obliquely arranged with the first partition plate, the first partition plate positioned at the lower part of the sludge return slit a is connected with a second baffle plate which is obliquely arranged with the first partition plate, a first three-phase separation area is formed among the first partition plate, the first baffle plate and the second baffle plate, the first three-phase separation area is formed between the air outlet slit a and the sludge return slit a, and an air outlet slit a is formed between the first baffle plate and the second baffle plate.
The anaerobic baffle plate reaction device comprises a methane production area 1 section, a methane production area 2 section, a methane production area 3 section, a methane production area 4 section, a methane production area 5 section and a methane production area 6 section which are sequentially formed by separating a second baffle plate, a first baffle plate, a third baffle plate, a second baffle plate, a fourth baffle plate and a fifth baffle plate, wherein the second baffle plate, the third baffle plate and the fourth baffle plate are provided with a space for sewage to flow through, the first baffle plate and the second baffle plate are provided with a space for sewage to flow through with the bottom of a reaction tank, the fifth baffle plate is provided with an air outlet slit b and a sludge return slit b, the air outlet slit b is positioned at the upper part of the sludge return slit b, the fifth baffle plate positioned at the upper part of the air outlet slit b is connected with the third baffle plate obliquely arranged with the fifth baffle plate, the fifth baffle plate positioned at the lower part of the sludge return slit b is connected with the fourth baffle plate obliquely arranged with the fifth baffle plate, a second three-phase separation area is formed among the fifth clapboard, the third baffle and the fourth baffle which are positioned between the air outlet slit b and the sludge return slit b, and a water outlet slit b is formed between the third baffle and the fourth baffle.
The invention relates to an anaerobic baffle plate reaction device, wherein the bottom of the side wall of a reaction tank is connected with a vent pipe, and the vent pipe is provided with a vent valve.
According to the anaerobic baffle plate reaction device, the heat collection supply pipe is provided with the temperature controller and the electromagnetic valve, and the temperature controller is in control connection with the electromagnetic valve.
According to the anaerobic baffle reaction device, a heat collection return pipe is communicated between the solar heat collection plate and the heat storage water tank, and a heat collection return pipe branch pipe is arranged between the heat storage water tank and the heat preservation device.
The invention also discloses a sewage treatment method, which is carried out in the anaerobic baffle reaction device and comprises the following steps: s01), the sewage enters a hydrolysis fermentation 1 stage of the reaction tank through a water inlet pipe under the suction action of a water inlet pump, and under the mixing action of a stirring device, complex organic matters in the sewage are hydrolyzed, fermented and generate acid by zymophyte in anaerobic activated sludge; s02), passing the acidified sewage through a first three-phase separation zone, further acidifying and precipitating in a hydrolysis fermentation 2 section, passing the precipitated sewage through a methane production zone 1 section, 2 section, 3 section, 4 section, 5 section and 6 section in sequence, and finally entering a water outlet pipe, and discharging the purified sewage through the water outlet pipe; s03), absorbing solar energy by a solar heat collecting plate at the top of the reaction tank, raising the water temperature, entering a heat storage water tank suspended on the side surface of the reaction tank through a heat collecting supply pipe, communicating the heat storage water tank with a hot water heat preservation device surrounding the periphery of the reaction tank, keeping the working temperature of the reaction tank at 50-55 ℃, and returning the cooled water to the solar heat collecting plate through a heat collecting return pipe of the heat storage water tank; s04), the chemical energy power generation system converts the marsh gas generated by the sewage into electric energy through a marsh gas generator, the marsh gas generator supplies power to a water inlet pump and a driving motor of a stirring device, the water inlet pump and the stirring device of the system are ensured to normally operate, and the sewage treatment is normally carried out.
According to the sewage treatment method, the concentration of anaerobic activated sludge in the reaction tank is 8000mg/L-15000 mg/L.
The invention has the beneficial effects that: the invention adds a stirring device in the hydrolysis fermentation area, improves the problem of uniform distribution of inlet water, and also uses a series of baffle plates which are vertically arranged, so that sewage flows up and down along the baffle plates in the reaction tank, thereby ensuring better plug flow state. Meanwhile, the hydrolysis fermentation area and the methanogenesis area are provided with three-phase separation areas, so that the acid production phase and the methanogenesis phase of the anaerobic reaction are better separated, and the anaerobic degradation effect is ensured. In addition, the solar energy is utilized to realize high-temperature anaerobic digestion, the chemical energy of methane is converted into electric energy to supply power for the water inlet pump and the driving motor of the stirring device, and the method is an efficient and green water treatment technology. The invention has simple structure and low energy consumption, reduces the sewage treatment cost and realizes the pollutant degradation and energy conversion of organic sewage on the whole.
Drawings
FIG. 1 is a top view of the anaerobic baffled reactor apparatus of the present invention;
FIG. 2 is a cross-sectional view taken along line 1-1 of FIG. 1;
in the figure: 1. a water inlet pipe, 2, a water inlet pump, 3, a reaction tank, 3-1, a hydrolysis fermentation area 1 section, 3-2, a hydrolysis fermentation area 2 section, 3-3, a methane production area 1 section, 3-4, a methane production area 2 section, 3-5, a methane production area 3 section, 3-6, a methane production area 4 section, 3-7, a methane production area 5 section, 3-8, a methane production area 6 section, 4, a stirring device, 4-1, a stirring rotating shaft, 4-2, a stirring motor, 5, a first clapboard, 6, a first lower clapboard, 7, a first baffle, 8, a second baffle, 9, a first three-phase separation area, 9-1, an air outlet seam a, 9-2, an water outlet seam a, 9-3, a sewage backflow seam a, 10, a second clapboard, 11, a first baffler, 12, a third clapboard, 13, a second baffler, 14. the system comprises a fourth partition board, 15, a fifth partition board, 16, a fifth lower partition board, 17, a third partition board, 18, a fourth partition board, 19, a second three-phase separation area, 19-1, gas outlet seams b, 19-2, water outlet seams b, 19-3, sewage backflow seams b, 20, a water outlet pipe, 21, a first biogas collector, 21-1, a second biogas collector, 22, biogas collecting pipes, 23, a biogas pre-processor, 24, a biogas generator, 24-1, a transformer, 25, a solar heat collecting plate, 26, a heat collecting supply pipe, 26-1, a temperature controller, 26-2, an electromagnetic valve, 27, a heat storage water tank, 27-1, a heat collecting supply pipe branch pipe, 27-2, a heat collecting return pipe branch pipe, 28, a heat preservation device, 29, a heat collecting return pipe, 30, a vent pipe, 30-1, a vent pipe valve, 31 and a manhole.
Detailed Description
The invention is further described with reference to the following figures and specific embodiments.
Examples
As shown in fig. 1 and 2, an anaerobic baffle plate reaction device comprises a reaction tank 3, and a plurality of hydrolysis fermentation areas and methane-producing areas which are arranged in the reaction tank 3 and are formed by separating a baffle plate from a baffle plate, wherein the hydrolysis fermentation areas and the methane-producing areas are communicated in series and allow sewage to flow through one by one, the hydrolysis fermentation area arranged at the foremost end and the methane-producing area arranged at the rearmost end are respectively communicated with a water inlet pipe 1 and a water outlet pipe 20, and a water inlet pump 2 is arranged on the water inlet pipe 1.
The anaerobic baffle plate reaction device further comprises a chemical energy power generation system and a solar heating system, wherein the chemical energy power generation system comprises a biogas collector 21 (21-1), a biogas collecting pipe 22, a biogas pre-processor 23 and a biogas generator 24, the biogas collector 21 (21-1) covers the hydrolysis fermentation area and the methane production area, the top of the biogas collector 21 (21-1) is communicated with the biogas collecting pipe 22, the biogas collecting pipe 22 is communicated with the biogas pre-processor 23, the biogas pre-processor 23 is connected with the biogas generator 24, and the biogas generator 24 is electrically connected with the water inlet pump 2 through a transformer 24-1; the solar heating system comprises a solar heat collecting plate 25, a heat collecting supply pipe 26, a heat storage water tank 27, a heat collecting supply pipe branch pipe 27-1 and a heat preservation device 28, wherein the heat preservation device 28 is sleeved on the periphery of the reaction tank 3, the solar heat collecting plate 25 is communicated with the heat storage water tank 27 through the heat collecting supply pipe 26, and the heat storage water tank 27 is communicated with the heat preservation device 28 through the heat collecting supply pipe branch pipe 27-1.
In the embodiment, the hydrolysis and fermentation area comprises a hydrolysis and fermentation area 1 section 3-1 and a hydrolysis and fermentation area 2 section 3-2 which are separated by a first partition plate 5, the first partition plate 5 is provided with an air outlet slit a 9-1 and a sludge return slit a 9-3, the air outlet slit a 9-1 is positioned at the upper part of the sludge return slit a 9-3, the first partition plate 5 positioned at the upper part of the air outlet slit a 9-3 is connected with a first baffle plate 7 which is obliquely arranged with the first baffle plate, the first partition plate 5 positioned at the lower part of the sludge return slit a 9-3 is connected with a second baffle plate 8 which is obliquely arranged with the first baffle plate, a first three-phase separation area 9 is formed between the first partition plate (namely a first lower partition plate 6 in figure 1) positioned between the air outlet slit a 9-1 and the sludge return slit a 9-3, and between the first baffle plate 7 and the second baffle plate 8, a water outlet seam a 9-2 is formed between the first baffle 7 and the second baffle 8.
In this embodiment, the methane generating area includes a methane generating area 1, a methane generating area 2, a methane generating area 3-5, a methane generating area 4, a methane generating area 5, and a methane generating area 6, which are sequentially partitioned by a second partition plate 10, a first baffle plate 11, a third partition plate 12, a second baffle plate 13, a fourth partition plate 14, and a fifth partition plate 15, wherein a space for sewage to flow through is reserved at the upper end of the reaction tank 3 for the second partition plate 10, the third partition plate 12, and the fourth partition plate 14, and a space for sewage to flow through is reserved at the bottom of the reaction tank 3 for the first baffle plate 11 and the second baffle plate 13. The sewage flows up and down in the reaction tank along the baffle plate and the partition plate and sequentially passes through the sludge bed of each reaction chamber.
The fifth clapboard 15 is provided with an air outlet slit b 19-1 and a sludge return slit b 19-2, the air outlet slit b 19-1 is positioned at the upper part of the sludge return slit b 19-2, the fifth clapboard 15 positioned at the upper part of the air outlet slit b 19-1 is connected with a third baffle 17 which is obliquely arranged with the fifth clapboard 15, the fifth clapboard 15 positioned at the lower part of the sludge return slit b 19-2 is connected with a fourth baffle 18 which is obliquely arranged with the fifth clapboard 15, the fifth clapboard (and the fifth lower clapboard 16 in the attached drawing 1) positioned between the air outlet slit b 19-1 and the sludge return slit b 19-2, a second three-phase separation area 19 is formed between the third baffle 17 and the fourth baffle 18, and the water outlet slit b 19-2 is formed between the third baffle 17 and the fourth baffle 18.
In the embodiment, a stirring device 4 is arranged in the section 3-1 of the hydrolysis fermentation zone 1, the stirring device 4 comprises a stirring blade, a stirring rotating shaft 4-1 and a stirring motor 4-2, the stirring motor 4-2 is a power source of the stirring device 4, an output shaft of the stirring motor is connected with the stirring blade through the stirring rotating shaft 4-1, and the stirring motor 4-2 is electrically connected with a biogas generator 24 through a transformer 24-1.
In the embodiment, the biogas collector comprises a first biogas collector 21 and a second biogas collector 21-1, the first biogas collector 21 covers the hydrolysis and fermentation zone 2 section 3-2, the methanogenesis zone 1 section 3-3, the methanogenesis zone 2 section 3-4, the methanogenesis zone 3 section 3-5, the methanogenesis zone 4 section 3-6 and the methanogenesis zone 5 section 3-7, the second biogas collector 21-1 covers the methanogenesis zone 6 section 3-8, the first biogas collector 21 and the second biogas collector 21-1 are both tip cover bodies with thick bottoms and thin upper ends, and the tops of the first biogas collector 21 and the second biogas collector 21-1 are both communicated with the biogas collecting pipe 22 and used for conveying the collected biogas into the biogas collecting pipe 22.
In the embodiment, the bottom of the side wall of the reaction tank 3 is connected with an emptying pipe 30, and the emptying pipe is provided with an emptying valve 30-1. The top of the reaction tank 3 is provided with a manhole 31.
In the embodiment, the heat collecting supply pipe is provided with a temperature controller 26-1 and an electromagnetic valve 26-2, and the temperature controller 26-1 is in control connection with the electromagnetic valve 26-2.
In this embodiment, a heat collection return pipe 29 is further communicated between the solar heat collection plate 25 and the heat storage water tank 26, and a heat collection return pipe branch pipe 27-2 is further arranged between the heat storage water tank 26 and the heat preservation device 28, and is used for realizing return water reheating.
In the embodiment, the concentration of the anaerobic activated sludge in the reaction tank 3 is 8000mg/L-15000mg/L, the working temperature of the heat preservation device 28 is 50-55 ℃, and the rotating speed of the stirring device 4 is 30 r/min-100 r/min.
The agitator motor 4-2 may be connected to an external power source when methane production is low during commissioning.
The invention improves the configuration of the traditional anaerobic baffled flow reaction tank, preserves the heat of the reaction tank by means of solar energy, and stirs the water inlet section of the reaction tank by means of methane chemical energy, thereby improving the anaerobic treatment efficiency, solving the problem of uneven distribution of the water inlet end, and realizing the sewage treatment with environmental protection, safety and no pollution.
The working principle of the solar heat preservation/chemical energy driven anaerobic baffled flow reaction device in the embodiment is as follows: the solar heat preservation/chemical energy driven anaerobic baffled flow reaction device processes sewage on one hand, and converts and collects energy in the sewage to provide heat and power for the operation of the device on the other hand. Firstly, sewage is discharged into a reaction tank 3 through a water inlet pipe 2 under the suction action of a water inlet pump 1. The water flow makes up-and-down expansion and sedimentation movement in each partition formed by each partition, baffle and folded plate, sequentially passes through a hydrolysis fermentation zone 1 section, a first three-phase separation zone 9, a hydrolysis fermentation zone 2 section 3-2, a methane production zone 1 section 3-3, a methane production zone 2 section 3-4, a methane production zone 3 section 3-5, a methane production zone 4 section 3-6, a methane production zone 5 section 3-7, a second three-phase separation zone 19 and a methane production zone 6 section 3-8, and is finally discharged through a water outlet pipe 20. Pollutants in the sewage are degraded by the anaerobic activated sludge, and a part of the pollutants is converted into methane, enters a methane generator 24 through a methane collecting pipe 22 and is converted into electric energy to provide power for a stirring motor 4-2 in the hydrolysis fermentation zone 1. The solar heat collecting plate 25 positioned at the top of the reaction tank converts green energy-solar energy into heat energy to preserve heat of the reaction tank, thereby ensuring higher treatment efficiency and conversion efficiency.
Example 2
The embodiment discloses a method for treating sewage by using the solar heat preservation/chemical energy driven anaerobic baffled flow reaction device in the embodiment 1, which comprises the following steps of:
firstly, operating a reaction tank:
the influent water (sewage) enters the reaction tank 3 through the water inlet pipe 2 under the suction action of the water inlet pump 1, under the condition that the stirrer 4 normally works, pollutants in the sewage flow up and down along with water flow in the reaction tank along the baffle plate, and are degraded and metabolized by anaerobic activated sludge in the hydrolysis fermentation area and the methanogenesis area which are independent of each other, so that the water quality is purified. The MLSS of the anaerobic activated sludge in the reaction tank 3 is 8000mg/L-15000mg/L, and the hydraulic retention time is 12-24 h. The purified sewage is discharged through the water outlet pipe 20.
II, power of the reaction tank:
in the operation process of the reaction tank 3, pollutants in the sewage are degraded by anaerobic activated sludge, and a part of the pollutants is converted into methane chemical energy which is converted into electric energy through the methane generator 24 to provide energy for the operation of the water inlet pump 1 and the stirrer motor 4-2 of the hydrolysis fermentation zone 1 section 3-1, so that the flowing uniformity of the water inlet flow in the reaction tank 3 is ensured. The stirring motor 4-2 drives the stirrer 4 to rotate at the rotating speed of 30 r/min-100 r/min, so that short flow is avoided.
Thirdly, heat preservation of the reaction tank:
in the operation process of the reaction tank, the temperature of the reaction tank 3 is maintained at 50-55 ℃ through a heat preservation device 28. This heat is converted to solar energy by the solar collector panel 25. The solar heat collecting plate 25 is made of an aluminum plate coating, hot water and cooling water respectively flow through the heat collecting supply pipe 26 and the heat collecting return pipe 29 to maintain the operating temperature, and the heat collecting supply pipe 26 and the heat collecting return pipe 29 are made of black chromium or red copper.
The following tests were used to verify the effect of the invention:
the waste water treatment method solves the problems that the treatment efficiency of the existing anaerobic treatment process needs to be further improved, and the heat preservation device has high operation cost and high energy consumption, and has the following effects:
COD is 5000-20000 mg/L, BOD53500-14000 mg/L of inlet water (sewage), 10-50 mg/L of ammonia nitrogen, 0.5-3 mg/L of total phosphorus and 6.0-7.0 of pH value, under the condition that the stirrer 4 normally works, pollutants flow up and down along with water flow along with a baffle plate in a reaction tank, are degraded and metabolized by anaerobic activated sludge in a hydrolysis fermentation area and a methane production area which are mutually independent, and when the water quality is purified, a part of organic matters are converted into methane, and power is provided for the operation of the reaction tank through a methane generator. The solar heat collecting plate at the top of the reaction tank 3 converts solar energy into heat energy, so that the working temperature of the reaction tank is maintained at 50-55 ℃.
The national water quality inspection standard (GB 5749 and 2006) is adopted to detect that the COD of the water outlet index of the test is 800-2000 mg/L, BOD5 and is 300-900 mg/L, the ammonia nitrogen is 5-30 mg/L and the total phosphorus is 0.2-2.5 mg/L, so that the water inlet requirement of the aerobic biological treatment process is met.
The foregoing description is only for the basic principle and the preferred embodiments of the present invention, and modifications and substitutions by those skilled in the art are included in the scope of the present invention.
Claims (9)
1. The utility model provides an anaerobism baffling board reaction unit, includes the reaction tank, is located a plurality of hydrolysis fermentation districts and the methane production district of formation separated by baffle and baffling board in the reaction tank, hydrolysis fermentation district and methane production district series connection intercommunication and allow sewage to flow through one by one, are located the hydrolysis fermentation district of foremost and are located the methane production district of rearmost end and are linked together with inlet tube and outlet pipe respectively, are equipped with intake pump, its characterized in that on the inlet tube: the chemical energy power generation system comprises a methane collector, a methane collecting pipe, a methane preprocessor and a methane generator, the methane collector is covered above the hydrolysis fermentation area and the methane production area, the top of the methane collector is communicated with the methane collecting pipe, the methane collecting pipe is communicated with the methane preprocessor, the methane preprocessor is connected with the methane generator, and the methane generator is electrically connected with the water inlet pump; the solar heating system comprises a solar heat collecting plate, a heat collecting supply pipe, a heat storage water tank, a heat collecting supply pipe branch pipe and a heat preservation device, wherein the heat preservation device is sleeved around the reaction tank, the solar heat collecting plate is communicated with the heat storage water tank through the heat collecting supply pipe, and the heat storage water tank is communicated with the heat preservation device through the heat collecting supply pipe branch pipe;
the hydrolysis and fermentation area comprises a hydrolysis and fermentation area 1 section and a hydrolysis and fermentation area 2 section which are separated by a first partition plate, an air outlet slit a and a sludge backflow slit a are formed in the first partition plate, the air outlet slit a is located on the upper portion of the sludge backflow slit a, the first partition plate located on the upper portion of the air outlet slit a is connected with a first baffle plate which is obliquely arranged with the first partition plate, a second baffle plate which is obliquely arranged with the first baffle plate is connected onto the first partition plate located on the lower portion of the sludge backflow slit a, the first partition plate located between the air outlet slit a and the sludge backflow slit a, a first three-phase separation area is formed between the first baffle plate and the second baffle plate, and an air outlet slit a is formed between the first baffle plate and the second baffle plate.
2. The anaerobic baffled reactor device of claim 1, wherein: a stirring device is arranged in the hydrolysis fermentation area, and a driving motor of the stirring device is electrically connected with a biogas generator.
3. The anaerobic baffled reactor device of claim 1, wherein: the biogas collector is a pointed top cover body with a thick bottom and a thin upper end, the bottom of the pointed top cover body covers the hydrolysis fermentation area and the methane production area, and the top point of the pointed top cover body is communicated with the biogas collecting pipe.
4. The anaerobic baffled reactor device of claim 1, wherein: the methane production area comprises a methane production area 1 section, a methane production area 2 section, a methane production area 3 section, a methane production area 4 section, a methane production area 5 section and a methane production area 6 section which are sequentially formed by sequentially separating a second partition plate (10), a first baffle plate (11), a third partition plate (12) and a fifth partition plate (15), the second partition plate (10), the third partition plate (12) and the fourth partition plate (14) leave a space for sewage to flow through with the upper end of the reaction tank, the first baffle plate (11) and the second baffle plate (13) leave a space for sewage to flow through with the bottom of the reaction tank, the fifth partition plate (15) is provided with an air outlet seam b and a sludge backflow seam b, the air outlet seam b is positioned at the upper part of the sludge backflow seam b, the fifth partition plate positioned at the upper part of the air outlet seam b is connected with a third baffle plate (17) obliquely arranged with the fifth partition plate, the fifth partition plate positioned at the lower part of the sludge backflow seam b is connected with a fourth baffle plate (18) obliquely arranged with the fifth partition plate, a second three-phase separation area (19) is formed among a fifth clapboard (15), a third baffle plate (17) and a fourth baffle plate (18) which are positioned between the air outlet seam b and the sludge return seam b, and a water outlet seam b is formed between the third baffle plate (17) and the fourth baffle plate (18).
5. The anaerobic baffled reactor device of claim 1, wherein: the bottom of the side wall of the reaction tank is connected with a vent pipe, and the vent pipe is provided with a vent valve.
6. The anaerobic baffled reactor device of claim 1, wherein: the heat collecting supply pipe is provided with a temperature controller and an electromagnetic valve, and the temperature controller is in control connection with the electromagnetic valve.
7. The anaerobic baffled reactor device of claim 1, wherein: a heat collecting return pipe is communicated between the solar heat collecting plate and the heat storage water tank, and a heat collecting return pipe branch pipe is arranged between the heat storage water tank and the heat preservation device.
8. A sewage treatment method is characterized in that: the sewage treatment method is carried out in an anaerobic baffle reaction device and comprises the following steps: s01), the sewage enters a hydrolysis fermentation 1 stage of the reaction tank through a water inlet pipe under the suction action of a water inlet pump, and under the mixing action of a stirring device, complex organic matters in the sewage are hydrolyzed, fermented and generate acid by zymophyte in anaerobic activated sludge; s02), passing the acidified sewage through a first three-phase separation zone, further acidifying and precipitating in a hydrolysis fermentation 2 section, passing the precipitated sewage through a methane production zone 1 section, 2 section, 3 section, 4 section, 5 section and 6 section in sequence, and finally entering a water outlet pipe, and discharging the purified sewage through the water outlet pipe; s03), absorbing solar energy by a solar heat collecting plate at the top of the reaction tank, raising the water temperature, entering a heat storage water tank suspended on the side surface of the reaction tank through a heat collecting supply pipe, communicating the heat storage water tank with a hot water heat preservation device surrounding the periphery of the reaction tank, keeping the working temperature of the reaction tank at 50-55 ℃, and returning the cooled water to the solar heat collecting plate through a heat collecting return pipe of the heat storage water tank; s04), the chemical energy power generation system converts the marsh gas generated by the sewage into electric energy through a marsh gas generator, the marsh gas generator supplies power to a water inlet pump and a driving motor of a stirring device, the water inlet pump and the stirring device of the system are ensured to normally operate, and the sewage treatment is normally carried out.
9. The wastewater treatment method according to claim 8, characterized in that: the concentration of the anaerobic activated sludge in the reaction tank is 8000mg/L-15000 mg/L.
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