CN114716110A - Aquaculture wastewater treatment system and method - Google Patents
Aquaculture wastewater treatment system and method Download PDFInfo
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- CN114716110A CN114716110A CN202210457087.XA CN202210457087A CN114716110A CN 114716110 A CN114716110 A CN 114716110A CN 202210457087 A CN202210457087 A CN 202210457087A CN 114716110 A CN114716110 A CN 114716110A
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- C02F1/00—Treatment of water, waste water, or sewage
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- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
- C02F1/461—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
- C02F1/467—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis by electrochemical disinfection; by electrooxydation or by electroreduction
- C02F1/4672—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis by electrochemical disinfection; by electrooxydation or by electroreduction by electrooxydation
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- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
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- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/78—Treatment of water, waste water, or sewage by oxidation with ozone
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- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/16—Nitrogen compounds, e.g. ammonia
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- C02F2101/30—Organic compounds
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- C02F2101/38—Organic compounds containing nitrogen
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- 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
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/08—Chemical Oxygen Demand [COD]; Biological Oxygen Demand [BOD]
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- C02F2209/22—O2
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- C02F2209/44—Time
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- 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
- C02F3/02—Aerobic processes
- C02F3/12—Activated sludge processes
- C02F3/1236—Particular type of activated sludge installations
- C02F3/1263—Sequencing batch reactors [SBR]
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- 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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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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- 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
- C02F3/327—Biological treatment of water, waste water, or sewage characterised by the animals or plants used, e.g. algae characterised by animals and plants
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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
- C02F3/34—Biological treatment of water, waste water, or sewage characterised by the microorganisms used
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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
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
Abstract
The invention relates to the technical field of aquaculture wastewater treatment, and discloses an aquaculture wastewater treatment system and method, which comprises a pretreatment module, an SBBR (sequencing batch reactor), a biological treatment module, a zeolite treatment module and an electrochemical oxidation module; the pretreatment module comprises a water inlet chamber, a water outlet chamber and a grid, wherein the water inlet chamber is provided with a water inlet; the SBBR reactor comprises a treatment tank and a biofilm carrier, wherein the bottom of the treatment tank is provided with activated sludge, the biofilm carrier is laid in the treatment tank, and the biofilm carrier is provided with functional flora; the biological treatment module comprises a bacteria-algae area and a filter-feeding animal area, and a microalgae layer is arranged in the bacteria-algae area; the zeolite treatment module comprises an adsorption tank and a zeolite layer, and the zeolite layer is positioned in the adsorption tank; the electrochemical oxidation module comprises a reaction tank, a positive and negative electrode plate and an ozone generator, wherein the ozone generator is connected with the reaction tank, the positive and negative electrode plate is positioned in the reaction tank, and the reaction tank is provided with a water outlet so as to better remove COD (chemical oxygen demand) and ammonia nitrogen in wastewater.
Description
Technical Field
The invention relates to the technical field of aquaculture wastewater treatment, in particular to an aquaculture wastewater treatment system and method.
Background
At present, the aquatic product industry in China develops rapidly, and the aquaculture amount far exceeds the fishing amount of aquatic products. According to statistics, the aquaculture yield of China in 2016 reaches 5142 ten thousand t, which accounts for 70% of the total aquaculture amount of the world, and through the development of two short years, the aquaculture yield of China accounts for 77.29% of the total aquaculture amount of the world in 2018. Meanwhile, the amount of aquaculture wastewater discharged per year in China is far more than 3 hundred million m3, which has great influence on water environment and daily life of people in China.
At present, the methods for treating water and wastewater for aquaculture are physical treatment, chemical treatment, biological treatment and the like. The physical treatment technology can only remove suspended matters in water, cannot remove soluble pollutants, particularly cannot remove ammonia nitrogen which has strong toxicity to cultured objects such as fish and the like, and has higher treatment cost and certain side effect in the chemical treatment technology. Although the biotechnology is environment-friendly, low in cost and suitable for water areas with various environmental conditions, the method is easily influenced by external environment, and the processing load per unit volume of the system is not high.
In patent CN113716819A, the invention provides a purification circulation system and method for aquaculture wastewater, the specific embodiment of which comprises a culture pond, and along the water flow direction, the purification circulation system sequentially comprises a filter tank, an adjusting tank, a primary filter tank, a biochemical reaction tank, a biological filter tank and a disinfection tank, wherein the filter tank is arranged in the adjusting tank and positioned at the top of the adjusting tank, and is communicated with the culture pond, so that the aquaculture wastewater in the culture pond conveniently flows into the adjusting tank through the filter tank; the bottom of the adjusting tank is communicated with the bottom of the primary filtering tank, the water body in the primary filtering tank overflows into the biochemical reaction tank, the bottom of the biochemical reaction tank is communicated with the bottom of the biological reaction tank, the water body in the biological reaction tank overflows into the biological filtering tank, the bottom of the biological filtering tank is communicated with the bottom of the disinfection tank, and a water outlet is formed in the disinfection tank so as to discharge the disinfected water body into the aquaculture tank. In this technical solution, there are mainly disadvantages: a plurality of reaction tank bodies are arranged, so that the occupied area is large and the construction cost is high; the biological reaction tank and the biological filter tank are adopted, the aquatic plants are easy to block after being matched with the filler structure for long-term operation, and the requirement on removing suspended solid pollutants in the pre-treatment unit is high; the culture wastewater often contains a large amount of nitrogen-containing pollutants and antibiotics, and is difficult to effectively remove by biological biochemical treatment.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: a large amount of nitrogen-containing pollutants and antibiotics still exist after the treatment of the conventional aquaculture wastewater treatment method.
In order to solve the technical problem, the invention provides an aquaculture wastewater treatment system, which comprises a pretreatment module, an SBBR reactor, a biological treatment module, a zeolite treatment module and an electrochemical oxidation module; the pretreatment module comprises a water inlet chamber, a water outlet chamber and a grid, the water inlet chamber and the water outlet chamber are separated by the grid, and the water inlet chamber is provided with a water inlet for inputting wastewater; the SBBR reactor comprises a treatment tank and a biofilm carrier, the treatment tank is communicated with the water outlet chamber through a pipeline, activated sludge is arranged at the bottom of the treatment tank, the biofilm carrier is laid in the treatment tank, and functional flora is arranged on the biofilm carrier and used for removing organic pollutants and nitrogen and phosphorus; the biological treatment module comprises a fungus-algae area and a filter-feeding animal area, wherein a microalgae layer is arranged in the fungus-algae area and used for removing COD (chemical oxygen demand) and nitrogen and phosphorus, the fungus-algae area is communicated with the treatment tank through a pipeline, the fungus-algae area is communicated with the filter-feeding animal area, and the filter-feeding animal area is used for removing algae; the zeolite treatment module comprises an adsorption tank and a zeolite layer, the top of the adsorption tank is communicated with the filter feeding animal zone through a pipeline, and the zeolite layer is positioned in the adsorption tank and laid in the middle of the adsorption tank; the electrochemical oxidation module comprises a reaction tank, a positive and negative electrode plate and an ozone generator, the reaction tank is communicated with the bottom of the adsorption tank through a pipeline, the ozone generator is connected with the reaction tank, the positive and negative electrode plate is positioned in the reaction tank, the positive and negative electrode plate is used for carrying out an electrooxidation reaction with wastewater, and the reaction tank is provided with a water outlet.
Furthermore, a packing layer is arranged in the fungus algae area, the microalgae layer is positioned above the packing layer, and the packing layer is used for supporting the microalgae layer.
Further, the biological treatment module further comprises a collecting tank detachably mounted in the filter feeder area, and the collecting tank is communicated with the filter feeder area.
Furthermore, the top of the filter feeder area is communicated with the adsorption tank through a pipeline, the bottom of the filter feeder area is communicated with the fungus algae area, an isolation net is arranged in the filter feeder area, and the isolation net is positioned at the upper part of the filter feeder area.
Further, the electrochemical oxidation module further comprises a solar energy accumulator and a solar power generator, the solar energy accumulator is installed at the top end of the reaction tank, the solar energy accumulator is respectively electrically connected with the cathode and anode plates and the ozone generator, the solar power generator is electrically connected with the solar energy accumulator, and the solar power generator supplies power to the solar energy accumulator.
Further, the zeolite treatment module further comprises a vacuum pump, and the vacuum pump is communicated with the bottom of the adsorption tank through a pipeline.
Further, the functional flora is one or more of animal glue bacillus, unicellular pileus, actinomycetes and filamentous fungi.
A method of using the aquaculture wastewater treatment system comprising the steps of:
s01, filtering the wastewater by using a grid to remove suspended pollutants and garbage in the wastewater;
s02, introducing the wastewater into an SBBR reactor, and removing organic pollutants, nitrogen and phosphorus in the wastewater by using functional flora while aerating, precipitating and standing the wastewater in a treatment tank;
s03, introducing the wastewater into a bacterial-algae area, and removing COD (chemical oxygen demand) and nitrogen and phosphorus in the wastewater by using the microalgae in the bacterial-algae area;
s04, introducing the wastewater into a filter-feeding animal area, and preying microalgae on filter-feeding animals in the filter-feeding animal area;
s05, introducing the wastewater into an adsorption tank, and adsorbing suspended solid pollutants and nitrogen and phosphorus by using a zeolite layer;
and S06, introducing the wastewater into the reaction tank, operating the cathode and anode plates and the ozone generator, carrying out electrooxidation reaction on the cathode and anode plates and the wastewater, carrying out oxidation reaction on the ozone output by the ozone generator and the wastewater, and removing organic pollutants in the wastewater.
Further, after the step S02, the dissolved oxygen of the wastewater is controlled to be 4-6 mg/L.
Further, in step S02, the aeration time is 1-2 h, the sedimentation time is 0.5-1 h, and the standby time is 30-50 min.
Compared with the prior art, the aquaculture wastewater treatment system and method provided by the embodiment of the invention have the beneficial effects that: the SBBR reactor, the biological treatment module, the zeolite treatment module and the electrochemical oxidation module are combined to carry out biochemical treatment on the wastewater, COD and ammonia nitrogen in the wastewater are better removed, the whole system is small in occupied area, strong in impact resistance and small in sludge production, and in a bacteria-algae-filter feeder system, nitrogen and phosphorus in the aquaculture wastewater can be efficiently removed by utilizing the metabolic effect of functional floras and the assimilation and absorption effect of microalgae on nitrogen and phosphorus, and microalgae can be removed by subsequent absorption of filter feeders, so that the quality of effluent water is improved. The zeolite adsorption system is adopted to further remove ammonia nitrogen in the effluent of the biochemical system, and the electrochemical oxidation module is utilized to carry out advanced treatment on the culture wastewater, so that antibiotic refractory pollutants can be effectively removed, the effluent quality of the treatment system is improved, and the water quality is ensured to meet the requirement of recycling.
Drawings
Fig. 1 is a schematic structural diagram of an embodiment of the present invention.
In the figure, 1, a preprocessing module; 11. a water inlet chamber; 12. a water outlet chamber; 13. a grid; 2. an SBBR reactor; 3. a biological treatment module; 31. a bacterial-algae area; 311. a microalgae layer; 312. a filler layer; 32. a filter feeder area; 321. an isolation net; 33. collecting tank; 4. a zeolite treatment module; 41. an adsorption tank; 42. a zeolite layer; 43. a vacuum pump; 5. an electrochemical oxidation module; 51. a reaction tank; 52. a plurality of groups of positive and negative electrode plates; 53. an ozone generator; 54. a solar energy accumulator.
Detailed Description
The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.
In the description of the present invention, it should be understood that the terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", etc., used herein to indicate the orientation or positional relationship, are based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
As shown in FIG. 1, the aquaculture wastewater treatment system according to the preferred embodiment of the invention comprises a pretreatment module 1, an SBBR reactor 2, a biological treatment module 3, a zeolite treatment module 4 and an electrochemical oxidation module 5.
The pretreatment module 1 comprises an inlet chamber 11, an outlet chamber 12 and a grating 13, wherein the inlet chamber 11 and the outlet chamber 12 are separated by the grating 13, the grating 13 is used for filtering large-volume suspended pollutants, large garbage and the like in a culture pond, the grating 13 needs to be periodically added with a lubricant to avoid blockage of the grating 13, and when the grating 13 is blocked in the operation process, the machine is stopped to manually clean the grating 13. The water inlet chamber 11 is provided with a water inlet for inputting wastewater, the water inlet is used for inputting aquaculture wastewater to be treated, and the wastewater enters the water inlet chamber 11 from the water inlet, is filtered by the grating 13 and then enters the water outlet chamber 12.
The SBBR reactor 2 comprises a treatment tank and a biofilm carrier, the treatment tank is communicated with the water outlet chamber 12 through a pipeline, and wastewater output by the water outlet chamber 12 enters the treatment tank. The bottom of the treatment tank is provided with activated sludge, the biofilm carrier is laid in the treatment tank, the biofilm carrier is provided with functional flora, the functional flora is matched with the activated sludge to effectively remove organic pollutants and nitrogen and phosphorus in the wastewater, wherein the organic pollutants are generally phenols, aldehydes, saccharides, polysaccharides, proteins and oils. The biomembrane carrier can be polyester fiber fabric and polyvinyl chloride coating, polyester fiber fabric and difluorinated resin, polyester fiber fabric and monofluorinated resin, etc. The functional flora is one or the combination of a plurality of animal glue bacillus, unicellular tuft, actinomycetes and filamentous fungi.
The zeolite treatment module 4 comprises an adsorption tank 41 and a zeolite layer 42, the top of the adsorption tank 41 is communicated with the filter feeder area 32 through a pipeline, and wastewater enters the zeolite treatment module 4 after being treated by the filter feeder area 32. The zeolite layer 42 is located in the adsorption tank 41 and is laid in the middle of the adsorption tank 41, and the zeolite in the zeolite layer 42 can adsorb suspended solid pollutants, nitrogen and phosphorus, NH 3-N and other volatile pollutants, so as to further purify the wastewater. The zeolite treatment module 4 further comprises a vacuum pump 43, the vacuum pump 43 is communicated with the bottom of the adsorption tank 41 through a pipeline, after the zeolite layer 42 is used up, the adsorption tank 41 can be vacuumized through the vacuum pump 43, volatile pollutants such as NH 3-N adsorbed on the zeolite layer 42 are pumped away, the recovery of the adsorption performance of the zeolite layer 42 is realized, and meanwhile, the packing layer 312 is prevented from being blocked.
The electrochemical oxidation module 5 comprises a reaction tank 51, a plurality of groups of positive and negative electrode plates 52 and an ozone generator 53, wherein the reaction tank 51 is communicated with the bottom of the adsorption tank 41 through a pipeline, and the wastewater treated by zeolite flows to the reaction tank 51. The ozone generator 53 is connected to the bottom of the reaction tank 51, and ozone output from the ozone generator 53 rises from the bottom of the reaction tank 51 to ensure sufficient contact with the substances in the wastewater. The negative and positive electrode board is located reaction tank 51, the negative and positive electrode board is used for taking place the electrooxidation reaction with waste water, and waste water flows through between the negative and positive electrode board, under electrooxidation and ozone oxidation, can get rid of the organic matter of difficult degradation such as antibiotic in the waste water, promotes water quality treatment effect and carries out the sterilization, satisfies aquaculture waste water recycling requirement. The reaction tank 51 is provided with a water outlet from which purified wastewater is discharged. The electrochemical oxidation module 5 further comprises a solar energy accumulator 54 and a solar power generator, wherein the solar energy accumulator 54 is installed at the top end of the reaction tank 51, the solar energy accumulator 54 is respectively electrically connected with the negative and positive electrode plates and the ozone generator 53, the solar power generator is electrically connected with the solar energy accumulator 54, the solar power generator can be installed at the top end of the reaction tank 51 or in a vacant place, and the solar power generator supplies power to the solar energy accumulator 54.
A method of using the aquaculture wastewater treatment system comprising the steps of: and S01, introducing the wastewater into the pretreatment module 1, and filtering the wastewater by using the grating 13 to remove suspended pollutants and garbage in the wastewater. S02, introducing the wastewater into a treatment tank of the SBBR reactor 2, aerating the wastewater in the treatment tank for 1-2 hours, precipitating for 0.5-1 hour, then standing for 30-50 minutes, controlling the dissolved oxygen of the wastewater to be 4-6 mg/L, and degrading organic pollutants and nitrogen and phosphorus by using the metabolic action of functional flora on a biomembrane carrier in the process. S03, introducing the wastewater into the bacterial-algae area 31, and removing COD (chemical oxygen demand) and nitrogen and phosphorus in the wastewater by using the microalgae in the bacterial-algae area; s04, introducing the wastewater into the filter-feeding animal area 32, preying microalgae on filter-feeding animals in the filter-feeding animal area 32, and transferring COD (chemical oxygen demand) and nitrogen and phosphorus in the wastewater from the microalgae to the filter-feeding animals; s05, introducing the wastewater into an adsorption tank 41, and adsorbing suspended solid pollutants and nitrogen and phosphorus by using a zeolite layer 42; s06, introducing the wastewater into the reaction tank 51, operating the cathode and anode plates and the ozone generator 53, carrying out electrooxidation reaction on the cathode and anode plates and the wastewater, carrying out oxidation reaction on the ozone output by the ozone generator 53 and the wastewater, and removing organic pollutants in the wastewater.
In summary, the embodiment of the invention provides an aquaculture wastewater treatment system and method, wherein an SBBR reactor 2, a biological treatment module 3, a zeolite treatment module 4 and an electrochemical oxidation module 5 are combined to carry out biochemical treatment on wastewater, so as to better remove COD and ammonia nitrogen in the wastewater, the whole system has small floor area, strong impact resistance and small sludge production, and in a bacteria-algae-filter feeder system, nitrogen and phosphorus in the aquaculture wastewater can be efficiently removed by using the metabolic action of functional flora and the assimilation and absorption action of microalgae on nitrogen and phosphorus, microalgae can be removed by the subsequent suction of filter feeders, and the quality of effluent is improved. The zeolite adsorption system is adopted to further remove ammonia nitrogen in the effluent of the biochemical system, and the electrochemical oxidation module 5 is used for carrying out advanced treatment on the culture wastewater, so that antibiotic refractory pollutants can be effectively removed, the effluent quality of the treatment system is improved, and the water quality is ensured to meet the requirement of recycling.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and substitutions can be made without departing from the technical principle of the present invention, and these modifications and substitutions should also be regarded as the protection scope of the present invention.
Claims (10)
1. An aquaculture wastewater treatment system comprising:
the pretreatment module comprises a water inlet chamber, a water outlet chamber and a grating, wherein the water inlet chamber and the water outlet chamber are separated by the grating, and the water inlet chamber is provided with a water inlet for inputting wastewater;
the SBBR reactor comprises a treatment tank and a biofilm carrier, the treatment tank is communicated with the water outlet chamber through a pipeline, activated sludge is arranged at the bottom of the treatment tank, the biofilm carrier is laid in the treatment tank, and functional floras are arranged on the biofilm carrier and used for removing organic pollutants and nitrogen and phosphorus;
the biological treatment module comprises a bacteria-algae area and a filter-feeding animal area, wherein a microalgae layer is arranged in the bacteria-algae area and used for removing COD (chemical oxygen demand) and nitrogen and phosphorus, the bacteria-algae area is communicated with the treatment tank through a pipeline, the bacteria-algae area is communicated with the filter-feeding animal area, and the filter-feeding animal area is used for removing algae;
the zeolite treatment module comprises an adsorption tank and a zeolite layer, the top of the adsorption tank is communicated with the filter feeder area through a pipeline, and the zeolite layer is positioned in the adsorption tank and is laid in the middle of the adsorption tank; and
the electrochemical oxidation module comprises a reaction tank, a positive and negative electrode plate and an ozone generator, the reaction tank is communicated with the bottom of the adsorption tank through a pipeline, the ozone generator is connected with the reaction tank, the positive and negative electrode plate is positioned in the reaction tank, the positive and negative electrode plate is used for carrying out electrooxidation reaction with wastewater, and the reaction tank is provided with a water outlet.
2. The aquaculture wastewater treatment system of claim 1, wherein: the bacterial-algae area is internally provided with a filler layer, the microalgae layer is positioned above the filler layer, and the filler layer is used for supporting the microalgae layer.
3. The aquaculture wastewater treatment system of claim 1, wherein: the biological treatment module further comprises a collecting tank, wherein the collecting tank is detachably mounted in the filter feeding animal area, and the collecting tank is communicated with the filter feeding animal area.
4. The aquaculture wastewater treatment system of claim 1, wherein: the top of the filter feeder area is communicated with the adsorption tank through a pipeline, the bottom of the filter feeder area is communicated with the fungus algae area, an isolation net is arranged in the filter feeder area, and the isolation net is positioned at the upper part of the filter feeder area.
5. The aquaculture wastewater treatment system of claim 1, wherein: the electrochemical oxidation module further comprises a solar energy accumulator and a solar generator, the solar energy accumulator is mounted at the top end of the reaction tank and is respectively and electrically connected with the positive and negative electrode plates and the ozone generator, the solar generator is electrically connected with the solar energy accumulator, and the solar generator supplies power to the solar energy accumulator.
6. The aquaculture wastewater treatment system of claim 1, wherein: the zeolite treatment module further comprises a vacuum pump, and the vacuum pump is communicated with the bottom of the adsorption tank through a pipeline.
7. The aquaculture wastewater treatment system of claim 1, wherein: the functional flora is one or the combination of a plurality of animal glue bacillus, unicellular tuft, actinomycetes and filamentous fungi.
8. A method of using an aquaculture wastewater treatment system according to any one of claims 1 to 5, comprising the steps of:
s01, filtering the wastewater by using a grid to remove suspended pollutants and garbage in the wastewater;
s02, introducing the wastewater into an SBBR reactor, and removing organic pollutants, nitrogen and phosphorus in the wastewater by using functional floras while aerating, precipitating and standing by the wastewater in a treatment tank;
s03, introducing the wastewater into a bacterial-algae area, and removing COD (chemical oxygen demand) and nitrogen and phosphorus in the wastewater by using microalgae in the bacterial-algae area;
s04, introducing the wastewater into a filter-feeding animal area, and preying microalgae on filter-feeding animals in the filter-feeding animal area;
s05, introducing the wastewater into an adsorption tank, and adsorbing suspended solid pollutants and nitrogen and phosphorus by using a zeolite layer;
and S06, introducing the wastewater into the reaction tank, operating the cathode and anode plates and the ozone generator, carrying out electrooxidation reaction on the cathode and anode plates and the wastewater, carrying out oxidation reaction on the ozone output by the ozone generator and the wastewater, and removing organic pollutants in the wastewater.
9. The method of claim 8, wherein: after the step S02, the dissolved oxygen of the wastewater is controlled to be 4-6 mg/L.
10. The method of claim 8, wherein: in step S02, the aeration time is 1-2 h, the sedimentation time is 0.5-1 h, and the standby time is 30-50 min.
Priority Applications (1)
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