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CN-120081546-B - Livestock wastewater treatment process based on biological synergist

CN120081546BCN 120081546 BCN120081546 BCN 120081546BCN-120081546-B

Abstract

The invention relates to the technical field of wastewater treatment, in particular to a livestock wastewater treatment process based on a biological synergist. The method solves the problem of poor removal effect of organic matters, ammonia nitrogen and total phosphorus in livestock wastewater in the traditional wastewater treatment process. The preparation method is optimized by preparing the first biological synergist and the second biological synergist, the application proportion of the first biological synergist and the second biological synergist in different tanks is reasonably adjusted, the reflux stage in the process is reasonably adjusted, and parameters such as illumination, dissolved oxygen, hydraulic retention time and the like in each stage are adapted to the process steps, so that organic matters, ammonia nitrogen and total phosphorus in livestock wastewater can be effectively removed, and the method meets the emission standard.

Inventors

  • ZHU XIANG
  • WANG JUAN
  • TANG CHUANLONG

Assignees

  • 南京益德清环保科技有限公司

Dates

Publication Date
20260512
Application Date
20250303

Claims (5)

  1. 1. A livestock wastewater treatment process based on a biological synergist is characterized by comprising the following steps: S1, enabling the wastewater to enter a symbiotic tank through a first pipeline, stopping illumination for 2.5-4.5 hours under 5000-7000lux, and intermittently illuminating until the symbiotic tank finishes 5-7.5d treatment, and enabling the obtained algae treatment wastewater to enter an aerobic tank; S2, starting a first vertical aerator in the aerobic tank, wherein the DO value is 1.8-4.0mg/L, the HRT value is 10-12h, the treated wastewater flows back to the symbiotic tank through a stripper of a pipeline III, starting a second vertical aerator in the symbiotic tank, so that the DO value of the symbiotic tank is 1.8-3.5mg/L, aerating for 2.5-4.5h, then carrying out illumination, 7000lux illumination is carried out for 3.5-5.0h, and aerating and illumination are alternately carried out until the symbiotic tank is finished for 3.5-5d, and the obtained second-stage illumination wastewater enters the aerobic tank again through the pipeline II; S3, starting a vertical aerator I, enabling the treated three-stage aeration wastewater to enter an anaerobic tank through a pipeline IV, fully reacting with HRT for 2.5-4d, and then enabling the wastewater to flow back into an aerobic tank through a stripper of a pipeline V; S4, starting a first vertical aerator, enabling the obtained four-stage aeration wastewater to enter an anaerobic tank through a pipeline IV for the second time, enabling the treated wastewater to flow out through a pipeline six, and enabling the obtained secondary anaerobic treatment wastewater to enter a three-dimensional particle electrode electro-Fenton reactor provided with an ultrasonic transducer to obtain livestock wastewater based on a biological synergist; The mixing algae in the symbiotic tank, the biological synergist I in the aerobic tank and the biological synergist II in the anaerobic tank are respectively added with livestock wastewater in the proportion of 30-50g to 1L, 20-60g to 1L and 10-45g to 1L; The preparation method of the biological synergistic agent I comprises the steps of mixing European nitromonas, wen Ya-philic nitromonas, nitribacter veronii, active nitribacter, pseudomonas aeruginosa, candida tropicalis, mucor, streptomyces griseus and Acinetobacter calcoaceticus fermentation strain concentrated solution according to the mass portion ratio of 1-3:1-3:1-4:1-3:1-2:1-2:1 to obtain strain mixed solution, diluting to obtain strain mixed dilution, adding 24-26 parts of enzyme solution into the strain mixed dilution, mixing to obtain mixed solution, adding 15-25 parts of UIO-66 material into the mixed solution, stirring and carrying out ultrasonic oscillation to obtain a biological synergistic agent I precursor, adding 45-70 parts of solution into the biological synergistic agent I precursor, stirring uniformly, then dropwise adding 50-60 parts of chitosan solution, continuously stirring to form gel microspheres, stirring, transferring into calcium chloride solution, soaking in sterile water, washing and drying to obtain the biological synergistic agent I.
  2. 2. The livestock wastewater treatment process based on the biological synergist, which is characterized by comprising the steps of adding sodium alginate solution and chitosan solution into 26-35 parts of pseudomonas denitrificans diluent, uniformly stirring, soaking in calcium chloride solution, washing gel beads, and drying to obtain the biological synergist II, wherein the concentration of the pseudomonas denitrificans diluent is 0.8X10 9 -1.2×10 9 CFU/mL.
  3. 3. A livestock wastewater treatment process based on a biological synergist according to claim 2 is characterized in that concentrated sulfuric acid and concentrated nitric acid are mixed according to a volume ratio of 3:1 to prepare a mixed acid solution, dry silica gel balls are melted and then are placed in a die to be cooled and solidified to obtain a silica gel column with a diameter of 10cm and a height of 20cm, the silica gel column is added into the mixed acid solution, dried after ultrasonic reaction, the acid-treated silica gel column is added into ammonia water, suction filtration is carried out after ultrasonic reaction, the ammonia silica gel column is dried to obtain an ammoniated silica gel column, 290-320 parts of the ammoniated silica gel column is added into glutaraldehyde solution, ultrasonic reaction is carried out for 2 hours at 25-30 ℃, finally, second biological synergist is added, ultrasonic treatment is continued for 5-9 hours, and a solidified product of the second biological synergist and the silica gel column is obtained after drying, and the solidified product is vertically fixed at the bottom of an anaerobic tank.
  4. 4. The livestock wastewater treatment process based on the biological synergist, which is characterized in that the enzyme solution is prepared by mixing a cellulase solution, a lipase solution, a thioesterase solution and a protease solution according to the mass ratio of 8-11:3-7:3-6:4-7.
  5. 5. A livestock wastewater treatment process based on a biological synergistic agent is characterized in that 1.5-2.0 parts of tetrabutyl titanate is slowly dripped into 90 parts of dimethylformamide, a tetrabutyl titanate solution is obtained by dripping and stirring, 0.4-0.9 part of indium nitrate hydrate is added into 90 parts of dimethylformamide, an indium nitrate solution is obtained by stirring and dissolving, 1.8 parts of hydrochloric acid aqueous solution is added into a zirconium nitrate solution, then terephthalic acid solution is added, stirring is carried out uniformly to obtain a precursor of a solution to be reacted, the tetrabutyl titanate solution and the indium nitrate solution are slowly added into the precursor of the solution to be reacted in sequence, stirring is carried out for 60min to obtain the solution to be reacted, the solution to be reacted is transferred into a stainless steel reaction kettle with a polytetrafluoroethylene lining, the stainless steel reaction kettle is sealed and then is put into an oven for reacting for 48h at 140 ℃ to obtain the precursor of the UIO-66 material, then the intermediate of the UIO-66 material is obtained by cooling, centrifuging and washing, and vacuum drying is carried out for 24h at 100 ℃ to obtain the UIO-66 material.

Description

Livestock wastewater treatment process based on biological synergist Technical Field The invention relates to the technical field of wastewater treatment, in particular to a livestock wastewater treatment process based on a biological synergist. Background With the large-scale and intensive development of livestock breeding industry, the production of livestock wastewater is increased sharply. The livestock wastewater is rich in high-concentration pollutants such as organic matters, nitrogen, phosphorus, pathogens and the like, and if the wastewater is not effectively treated and directly discharged, the wastewater can cause serious pollution to soil, water and atmospheric environment, and ecological balance and human health are threatened. A traditional livestock wastewater treatment process takes an activated sludge method as an example, and the typical steps of the process are that the wastewater firstly intercepts larger suspended matters and impurities through a grid to prevent subsequent equipment from being blocked, then flows into a sand setting tank, removes inorganic particles such as sand grains and the like through gravity precipitation, then flows into a primary sedimentation tank, separates part of suspended matters and organic matters through natural precipitation, then flows into an aeration tank, fully contacts microorganisms with the wastewater through aeration to decompose the organic matters, then flows into a secondary sedimentation tank to realize mud-water separation, the precipitated water reaches the standard to be discharged, and part of precipitated sludge flows back to the aeration tank to be discharged out of a treatment system as surplus sludge. However, the conventional process has a plurality of defects, particularly for livestock wastewater generated in pig breeding, the treatment efficiency is low, and pollutants such as high-concentration organic matters, nitrogen, phosphorus and the like in the wastewater are difficult to remove. The traditional treatment process has weak impact load resistance, and once the quality and quantity of wastewater have larger fluctuation, the treatment effect is greatly reduced. The denitrification and dephosphorization effects are not ideal, and cannot meet the current increasingly severe environmental protection standards. With the continuous improvement of environmental protection requirements, the development of a more efficient, stable and low-cost livestock wastewater treatment process is urgent. Disclosure of Invention The invention aims to provide a livestock wastewater treatment process based on a biological synergist, which solves the problem of poor removal effect of organic matters, ammonia nitrogen and total phosphorus of livestock wastewater in the traditional wastewater treatment process. The preparation method is optimized by preparing the first biological synergist and the second biological synergist, the application proportion of the first biological synergist and the second biological synergist in different tanks is reasonably adjusted, the reflux stage in the process is reasonably adjusted, parameters such as illumination, dissolved oxygen (DO value), hydraulic Retention (HRT) time and the like in each stage are adapted to the process steps, and therefore organic matters, ammonia nitrogen and total phosphorus in livestock wastewater can be effectively removed, and the method meets the emission standard. In order to achieve the above purpose, the present invention provides the following technical solutions: the invention provides a livestock wastewater treatment process based on a biological synergist, which comprises the following steps: The waste water enters a storage pool after the suspended solids and the floaters with larger volume are removed through a grid, a simple biochemical reaction is carried out in the storage pool, a small part of waste is removed, the mixture in the storage pool is lifted by a pump to enter a separator, solid-liquid separation is carried out in the separator, the separated solid enters a waste residue storage yard, the separated waste water enters an air floatation tank, part of suspended pollutants are removed in the air floatation tank, and effluent enters an adjusting tank. The initial COD (chemical oxygen demand), ammonia nitrogen and total phosphorus concentration of the livestock wastewater to be treated are 9486mg/L, 413mg/L and 31mg/L respectively. A livestock wastewater treatment process based on a biological synergist comprises the following steps: S1, enabling the wastewater to enter a symbiotic tank through a first pipeline, stopping illumination for 2.5-4.5 hours under 5000-7000lux, and intermittently illuminating until the symbiotic tank finishes 5-7.5d treatment, and enabling the obtained algae treatment wastewater to enter an aerobic tank; S2, starting a first vertical aerator, wherein the DO value is 1.8-4.0mg/L, the HRT value is 10-12h, the treated wastewater flows back to t