CN110627316B - Breeding wastewater treatment process - Google Patents
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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
- C02F9/00—Multistage treatment of water, waste water or sewage
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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
- C02F1/00—Treatment of water, waste water, or sewage
- C02F2001/007—Processes including a sedimentation step
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- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/20—Heavy metals or heavy metal 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
- 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
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
- C02F2101/38—Organic compounds containing nitrogen
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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
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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
- C02F2301/00—General aspects of water treatment
- C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
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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
- C02F3/30—Aerobic and anaerobic 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
- C02F3/32—Biological treatment of water, waste water, or sewage characterised by the animals or plants used, e.g. algae
- C02F3/322—Biological treatment of water, waste water, or sewage characterised by the animals or plants used, e.g. algae use of algae
- C02F3/325—Biological treatment of water, waste water, or sewage characterised by the animals or plants used, e.g. algae use of algae as symbiotic combination of algae and bacteria
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Abstract
The invention relates to a culture wastewater treatment process, which specifically comprises the following steps: s1, collecting the breeding wastewater into a dreg settling tank through a sewage discharge pipe, treating the breeding wastewater through a solid-liquid separator to remove solid excrement residues, and allowing the liquid to enter a black film methane tank; s2, measuring the inflow water entering the black film methane tank through the inflow water flow well, and distributing the water to the black film methane tank to remove organic matters in the water; s3, distributing water to the algae purification pond through the biogas slurry generated by the black-film biogas digester through a lift pump, and putting the algae bacteria immobilized reaction group into the algae bacteria immobilized reaction pond to remove nitrogen and phosphorus nutrients, heavy metals and refractory organic matters in the water body; s4, enabling the effluent of the algae purification pool to enter an intermediate sedimentation pool, realizing algae-laden water separation according to the action of gravity, and enabling sediment to flow back to the algae purification pool; s5, enabling the effluent of the intermediate sedimentation tank to enter an aeration biological tank, wherein a microbial generator is arranged in the tank, and rapidly degrading organic matters and biochemical sludge in the water body through the generated microbial flora; s6, the clarified water of the aeration biological pond enters a water storage pond.
Description
Technical Field
The invention relates to a breeding wastewater treatment process, and belongs to the technical field of livestock breeding wastewater treatment.
Background
With the rapid development of livestock and poultry breeding in China, the yield of poultry meat, pork and eggs in China is continuously increased, the cost of the breeding farm can be reduced by a large-scale breeding farm, the economic income is increased, but the feces and urine of the breeding farm are excessively concentrated by the large scale, and the surrounding environment of the breeding farm bears huge pressure. The aquaculture wastewater has the characteristics of large water discharge, high organic matter concentration, high nitrogen and phosphorus nutrient element content and the like, and the wastewater is often accompanied by pollutants such as disinfectant water, heavy metals, residual veterinary drugs, various zoonosis pathogens and the like, so that the treatment difficulty is high. The situation of wastewater pollution of a farm is very severe, and in order to efficiently treat the wastewater of the farm, avoid the pollution of the wastewater to water and soil caused by random discharge, the water pollution is urgently coped with, and the treatment is more reluctant.
The traditional physical treatment technology and chemical treatment technology have the defects of large early investment, high energy consumption, high operation and maintenance cost and the like, and the bioremediation technology has gained more and more international attention due to the advantages of low cost and high ecological benefit. The sludge in the activated sludge process provides a growing breeding space for microorganisms in the sewage, is mainly used for removing BOD or COD in the wastewater, but has unstable nitrogen and phosphorus removal effect. The microalgae has the characteristics of high photosynthesis efficiency, short growth period, no occupation of agricultural land, strong environmental adaptability and the like, can absorb a large amount of nitrogen and phosphorus in the growth process, and has great potential in the aspect of treating wastewater by adopting the microalgae, particularly removing the nitrogen and phosphorus.
Patent document CN108485931A discloses a continuous processing system based on chlorella processing fermentation biogas slurry, including biogas slurry pretreatment unit, chlorella culture unit and chlorella harvesting unit, biogas slurry pretreatment unit includes the fermentation cylinder, the biogas slurry equalizing basin, the micro-electrolysis jar, the Fenton oxidation tank, neutralization sedimentation tank, and decoloration biogas tank, chlorella culture unit includes a plurality of tubular photobioreactor, this reactor includes three feed inlets, be used for inputting the culture solution of chlorella respectively, through decoloration biogas tank exhaust cleaning solution, and gas, chlorella harvesting unit includes centrifuge, centrifuge communicates with tubular photobioreactor's discharge gate, obtain chlorella algae thick liquid and chlorella after the centrifuge handles, the filtrate after the chlorella is purified. The pretreated biogas slurry is used for culturing chlorella, the chlorella photobioreactor can effectively treat fermented biogas slurry, the water quality standard of farmland irrigation can be met by combining artificial wetland treatment, the cultured chlorella has obvious economic value, but the chlorella collection process in the invention has large workload, long collection process and low treatment efficiency of the fermented biogas slurry.
Patent CN109455828A discloses an application method of immobilized microorganisms in livestock and poultry breeding wastewater treatment, and the technical process comprises the following steps: preparing microbial fermentation liquor; preparing immobilized microorganisms; performing induction culture on the immobilized microorganisms; domesticating and culturing; and (5) treating the aquaculture wastewater. According to the invention, a symbiotic system of various microorganisms is constructed, and the microorganisms can act synergistically to effectively degrade organic matters, nitrogen, phosphorus and heavy metal pollutants in the livestock and poultry breeding wastewater; however, the immobilized microorganism in the invention has complex flow, high technical content, difficult operation by non-professional personnel and higher time cost.
Disclosure of Invention
In order to solve the technical problems, the invention provides a cultivation wastewater treatment process
Combining the advantages of the activated sludge treatment method, the microalgae culture method and the microorganism culture method for treating the breeding wastewater, nitrogen and phosphorus organic matters, heavy metals and refractory organic matters in the breeding wastewater can be quickly and efficiently removed, meanwhile, the quality of the effluent of the breeding wastewater treatment is improved, and the treated water is recycled to flush livestock and poultry houses, so that zero discharge is realized.
The technical scheme of the invention is as follows:
a cultivation wastewater treatment process is characterized by comprising the following steps:
s1, collecting the breeding wastewater into a dreg settling tank through a sewage discharge pipe, treating the breeding wastewater through a solid-liquid separator to remove solid excrement residues, and allowing the liquid to enter a black film methane tank;
s2, measuring the inflow water entering the black film methane tank through the inflow water flow well, and distributing the water to the black film methane tank to remove organic matters in the water;
s3, distributing biogas slurry generated by the black-film biogas digester to an algae purification tank through a lifting pump room, putting immobilized algae bacteria reaction groups into the algae purification tank, aerating the tank to promote the growth of algae bacteria, and removing nitrogen and phosphorus nutrients, heavy metals and refractory organic matters in a water body;
s4, enabling the effluent of the algae purification pool to enter an intermediate sedimentation pool, naturally settling an immobilized algae-bacteria reaction group in the water body according to the action of gravity to realize algae-bacteria separation, and refluxing the sediment to the algae purification pool or processing the sediment into organic bio-fertilizer;
s5, enabling the effluent of the intermediate sedimentation tank to enter an aeration biological tank, arranging a microorganism generator in the tank, arranging an air blower, an aeration grid and a beneficial microorganism carrier pipe in the microorganism generator, aerating the beneficial microorganism carrier pipe through the air blower, generating high-density microorganism flora in the peripheral water body, and further rapidly degrading organic matters and biochemical sludge dissolved in the water body;
s6, the clarified water of the aeration biological pond enters a water storage pond.
Wherein, an intermediate adjusting tank is arranged between the black film methane tank and the algae purifying tank in the step S3, and a stirring device is arranged in the tank for adjusting the water quality and the water quantity.
And in the step S3, the lifting pump room is provided with a variable frequency water pump driven by a variable frequency motor to lift the inlet water.
Wherein the immobilized chlorella-activated sludge reaction mass in the step S3 is 10-20% of the total volume of the wastewater in the algae purification tank.
Wherein the culture conditions of the algae purification pond in the step S3 are that the illumination intensity is 4000-10000 Lux, the illumination time is 16:8h, and the temperature is 25-32 ℃; white ceramic tiles are paved at the bottom and around the algae purification tank to enhance the illumination intensity in the tank.
Wherein, the microbial generator in step S5 further includes buoys symmetrically disposed at upper portions of two sides of the apparatus, so that the microbial generator can float on the water surface for operation.
And C, processing the excrement residue generated in the residue settling tank in the step S1 into the bio-organic fertilizer.
Wherein, still include the sludge treatment process: and the sludge generated by the intermediate regulating tank flows into a sludge drying tank, and is dried to be used as a biological organic fertilizer.
The invention has the following beneficial effects:
1. the invention adds the algae purifying pool and the aeration biological pool in the prior sewage treatment process, and the combination of the algae purifying pool and the aeration biological pool ensures that the sewage after the subsequent treatment meets the 1-level A standard effluent; the addition of the immobilized algae-bacteria reaction group in the algae culture pond combines the advantages of an activated sludge method and a microalgae culture method for treating the culture wastewater, constructs an algae-bacteria symbiotic system, is more targeted for removing nitrogen and phosphorus nutrients, heavy metals and refractory organic matters in the culture wastewater, and can well solve the problems of difficult separation of algae water and cell loss by treating algae and activated sludge by an immobilization method; meanwhile, the effluent of the algae purification tank flows into the aeration biological tank, the high-density microbial flora generated by the microbial generator continues to digest and degrade residual organic matters and harmful microorganisms in the water body, sludge is not generated in the process, the treated water contains a large amount of beneficial microorganisms, the beneficial microorganisms are recycled and extracted to wash the livestock house, fresh water is not needed to wash the livestock house, a large amount of clean water is saved, the requirements of sewage treatment on energy conservation and environmental protection are met, and after the beneficial microorganisms in the environment are increased after the water is washed, so that the ground is cleaner, and no odor exists in the air.
2. According to the invention, the immobilized phycomycete reaction group is put into the algae purification tank, the pores of the immobilized beads are utilized for exchanging substances, the thalli in the activated sludge consume organic matters in water through aerobic respiration, carbon dioxide is released, the chlorella photosynthesis absorbs the carbon dioxide to release oxygen, nitrogen and part of phosphorus in the sewage are absorbed and utilized by the chlorella through the pores, and part of the phosphorus is adsorbed on the surface of the immobilized beads, so that the effects of nitrogen and phosphorus removal of the sewage are achieved.
3. The composition of the waste water of the farm mainly is livestock manure, livestock urine and livestock house flushing water, the excrement amount and flushing water amount dissolved in the water directly influence the concentration of the waste water of the farm, the characteristics of the water quality and the water amount are generally related to the structure of the livestock house, the manure cleaning mode, the time and the like.
4. The culture wastewater enters the black film methane tank after being treated by the solid-liquid separator, so that the problem of incrustation of the methane tank can be effectively solved, the work of cleaning methane slag is avoided, the service life of the methane tank is prolonged, meanwhile, the black film methane tank integrates fermentation and gas storage, and the black film methane tank has the advantages of simple and convenient construction, low manufacturing cost, simple process flow, convenient operation and maintenance, large daily methane yield, good anti-seepage effect and the like, COD (chemical oxygen demand) of the wastewater treated by the black film methane tank can be reduced by more than 80 percent, not only can the culture pollution be reduced, the morbidity of livestock and poultry can be reduced, and the comprehensive utilization can also save the fertilizer cost.
Drawings
FIG. 1 is a process flow diagram of the present invention;
FIG. 2 is a schematic view of the structure of the microbial generator of the present invention.
In the figure: 1. a microbial generator; 2. a blower; 3. an aeration grid; 4. a beneficial microorganism carrier tube; 5. a float bowl.
Detailed Description
The invention is described in detail below with reference to the figures and the specific embodiments.
Referring to fig. 1 and 2, a cultivation wastewater treatment process specifically comprises the following steps:
s1, collecting the breeding wastewater into a dreg settling tank through a sewage discharge pipe, treating the breeding wastewater through a solid-liquid separator to remove solid excrement residues, and allowing the liquid to enter a black film methane tank;
s2, measuring and distributing water entering the black film methane tank through the water inlet flow well to the black film methane tank to remove organic matters in the water and generate methane, and performing desulfurization and decarburization treatment on the generated methane to be used as heat assistance and illumination of a boiler;
s3, distributing biogas slurry generated by the black-film biogas digester to an algae purification tank through a lifting pump room, putting an immobilized algae-bacteria reaction group into the algae purification tank, aerating the tank, exchanging substances of chlorella and microorganisms in the reaction group through the surface of a sphere, and removing nitrogen and phosphorus nutrients, heavy metals and refractory organic matters in a water body in the growth and propagation processes of algae cells and microorganisms;
s4, enabling the effluent of the algae purification pool to enter an intermediate sedimentation pool, naturally settling an immobilized algae-bacteria reaction group in the water body according to the action of gravity to realize algae-bacteria separation, and refluxing the sediment to the algae purification pool or processing the sediment into organic bio-fertilizer;
s5, enabling the effluent of the intermediate sedimentation tank to enter an aeration biological tank, arranging a microorganism generator 1 in the tank, arranging an air blower 2, an aeration grid 3 and a beneficial microorganism carrier pipe 4 in the instrument, fixing a composite microorganism flora comprising photosynthetic bacteria, saccharomycetes, nitrobacteria, denitrifying bacteria, nitrifying and denitrifying composite bacteria and the like in the beneficial microorganism carrier pipe 2, aerating the beneficial microorganism carrier pipe 4 through the air blower 2, enabling microorganisms to continuously grow and reproduce for nutrition by relying on organic matters in water under the condition that dissolved oxygen is increased, forming a high-density microorganism flora, and further rapidly degrading the organic matters and biochemical sludge dissolved in the water.
S6, the clear water of the aeration biological tank enters a water storage tank, the clear water is pumped by a water pump room to wash the livestock and poultry house, the treated water contains a large amount of beneficial microorganisms, after the ground of the livestock and poultry house is washed, beneficial bacteria in the environment can be increased, and meanwhile, peculiar smell in the air is removed.
Further, an intermediate adjusting tank is arranged between the black film methane tank and the algae purifying tank in the step S3, and a stirring device is arranged in the tank to adjust the water quality and the water quantity.
Further, in the step S3, the lift pump room is provided with a variable frequency water pump driven by a variable frequency motor to lift the inlet water.
Further, in the step S3, the immobilized chlorella-activated sludge reaction mass is an immobilized chlorella-activated sludge reaction mass, and the addition ratio is 10-20% of the total volume of the wastewater in the algae purification tank;
wherein, in the preparation process of the immobilized phycomycete reaction group, the weight ratio of the chlorella to the activated sludge is 1: 0.4-2.5, the carrier and the cross-linking agent for preparation are sodium alginate and calcium chloride respectively, wherein the sodium alginate as a food additive is nontoxic to organisms, and the calcium alginate formed by cross-linking with a calcium chloride solution has better mechanical strength and porosity.
Further, in the step S3, the culture conditions of the algae purification pond are that the illumination intensity is 4000-10000 Lux, the illumination time is 16:8h (namely 16h of illumination and 8h of no illumination), and the temperature is 25-32 ℃; white ceramic tiles are paved at the bottom and around the algae purification tank to enhance the illumination intensity in the tank.
Further, in the step S5, the microbial generator 1 further includes buoys 3 symmetrically disposed at upper portions of two sides of the apparatus, so that the microbial generator 1 can float on the water surface to work.
Further, the excrement residue generated in the residue settling tank in the step S1 is processed into the bio-organic fertilizer.
Further, the method also comprises a sludge treatment process: and the sludge generated by the intermediate regulating tank flows into a sludge drying tank, and is dried to be used as a biological organic fertilizer.
The above embodiments are preferred embodiments of the present invention, but the present invention is not limited to the above embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be construed as equivalents thereof, and all such changes, modifications, substitutions, combinations, and simplifications are intended to be included in the scope of the present invention.
Claims (7)
1. A cultivation wastewater treatment process is characterized by comprising the following steps:
s1, collecting the breeding wastewater into a dreg settling tank through a sewage discharge pipe, treating the breeding wastewater through a solid-liquid separator to remove solid excrement residues, and allowing the liquid to enter a black film methane tank;
s2, measuring the inflow water entering the black film methane tank through the inflow water flow well, and distributing the water to the black film methane tank to remove organic matters in the water;
s3, distributing biogas slurry generated by the black-film biogas digester to an algae purification tank through a lifting pump room, putting immobilized algae bacteria reaction groups into the algae purification tank, aerating the tank to promote the growth of algae bacteria, and removing nitrogen and phosphorus nutrients, heavy metals and refractory organic matters in a water body;
s4, enabling the effluent of the algae purification pool to enter an intermediate sedimentation pool, naturally settling an immobilized algae-bacteria reaction group in the water body according to the action of gravity to realize algae-bacteria separation, and refluxing the sediment to the algae purification pool or processing the sediment into organic bio-fertilizer;
s5, enabling the effluent of the intermediate sedimentation tank to enter an aeration biological tank, arranging a microorganism generator (1) in the tank, arranging an air blower (2), an aeration grid (3) and a beneficial microorganism carrier pipe (4) in the tank, aerating the beneficial microorganism carrier pipe (4) through the air blower (2), generating high-density microorganism flora in the peripheral water body, and further rapidly degrading organic matters and biochemical sludge dissolved in the water body; wherein the microbial generator (1) comprises buoys (5) symmetrically arranged at the upper parts of two sides of the instrument, so that the microbial generator (1) can float on the water surface to work;
s6, the clarified water of the aeration biological pond enters a water storage pond.
2. The aquaculture wastewater treatment process of claim 1, wherein: an intermediate adjusting tank is arranged between the black film methane tank and the algae purifying tank in the step S3, and a stirring device is arranged in the tank and used for adjusting the water quality and the water quantity.
3. The aquaculture wastewater treatment process of claim 1, wherein: and in the step S3, the lifting pump room is provided with a variable frequency water pump driven by a variable frequency motor to lift the inlet water.
4. The aquaculture wastewater treatment process of claim 1, wherein: the immobilized chlorella-activated sludge reaction group is used as the immobilized chlorella reaction group in the step S3, and the addition proportion is 10-20% of the total volume of the wastewater in the algae purification tank.
5. The aquaculture wastewater treatment process of claim 1, wherein: the culture conditions of the algae purification pond in the step S3 are that the illumination intensity is 4000-10000 Lux, the illumination time is 16:8h, and the temperature is 25-32 ℃; white ceramic tiles are paved at the bottom and around the algae purification tank to enhance the illumination intensity in the tank.
6. The aquaculture wastewater treatment process of claim 1, wherein: and processing the excrement residue generated in the residue settling tank in the step S1 into the bio-organic fertilizer.
7. The aquaculture wastewater treatment process of claim 1, wherein: also comprises a sludge treatment process: and the sludge generated by the intermediate regulating tank flows into a sludge drying tank, and is dried to be used as a biological organic fertilizer.
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| CN112537848A (en) * | 2020-11-30 | 2021-03-23 | 华川技术有限公司 | Process for improving quality of tail water of sewage plant |
| CN113045133A (en) * | 2021-03-24 | 2021-06-29 | 重庆大学 | System and method for treating livestock and poultry breeding wastewater by anaerobic fermentation coupled with microalgae organisms |
| CN113149358A (en) * | 2021-04-27 | 2021-07-23 | 中国科学院广州能源研究所 | Livestock and poultry breeding biogas slurry treatment and resource utilization method |
| CN113562928B (en) * | 2021-06-17 | 2024-01-02 | 葛洲坝集团生态环保有限公司 | Algae, microorganism and domestic sewage treatment system and process thereof |
| CN113998842B (en) * | 2021-11-25 | 2023-08-22 | 石玉龙 | Biological treatment and recovery process for cultivation wastewater |
| CN115246696A (en) * | 2022-08-03 | 2022-10-28 | 广东省适然环境科技研究有限公司 | Sewage treatment system of plant |
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