CN113716818B - Intelligent circulation treatment system for aquaculture wastewater - Google Patents
Intelligent circulation treatment system for aquaculture wastewater Download PDFInfo
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- CN113716818B CN113716818B CN202111198950.6A CN202111198950A CN113716818B CN 113716818 B CN113716818 B CN 113716818B CN 202111198950 A CN202111198950 A CN 202111198950A CN 113716818 B CN113716818 B CN 113716818B
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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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- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01K—ANIMAL HUSBANDRY; AVICULTURE; APICULTURE; PISCICULTURE; FISHING; REARING OR BREEDING ANIMALS, NOT OTHERWISE PROVIDED FOR; NEW BREEDS OF ANIMALS
- A01K63/00—Receptacles for live fish, e.g. aquaria; Terraria
- A01K63/04—Arrangements for treating water specially adapted to receptacles for live fish
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01K—ANIMAL HUSBANDRY; AVICULTURE; APICULTURE; PISCICULTURE; FISHING; REARING OR BREEDING ANIMALS, NOT OTHERWISE PROVIDED FOR; NEW BREEDS OF ANIMALS
- A01K63/00—Receptacles for live fish, e.g. aquaria; Terraria
- A01K63/04—Arrangements for treating water specially adapted to receptacles for live fish
- A01K63/045—Filters for aquaria
-
- 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
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
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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
- C02F1/006—Water distributors either inside a treatment tank or directing the water to several treatment tanks; Water treatment plants incorporating these distributors, with or without chemical or biological tanks
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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
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/281—Treatment of water, waste water, or sewage by sorption using inorganic sorbents
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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
- C02F1/30—Treatment of water, waste water, or sewage by irradiation
- C02F1/32—Treatment of water, waste water, or sewage by irradiation with ultraviolet light
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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
- C02F2101/10—Inorganic compounds
- C02F2101/16—Nitrogen compounds, e.g. ammonia
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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
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- C02F2303/04—Disinfection
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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
- C02F3/02—Aerobic processes
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- C02F3/00—Biological treatment of water, waste water, or sewage
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- C02F3/303—Nitrification and denitrification treatment characterised by the nitrification
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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
- C02F3/30—Aerobic and anaerobic processes
- C02F3/302—Nitrification and denitrification treatment
- C02F3/305—Nitrification and denitrification treatment characterised by the denitrification
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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
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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
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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
- C02F7/00—Aeration of stretches of water
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- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
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Abstract
The invention discloses an intelligent circulation treatment system for aquaculture wastewater, which comprises a water treatment system and a control system, wherein the water treatment system comprises a culture pond, and sequentially comprises a filter tank, an adjusting pond, a primary filter pond, a biochemical reaction pond, a biological filter pond and a disinfection pond along the water flow direction, and the control system comprises a monitoring unit, a water quality index database, a judging unit, a decision unit and an action unit; the judging unit is connected with the monitoring unit and the water quality database, and the judging unit is connected with the decision unit; the decision unit is connected with the action unit, and processing decisions aiming at different out-of-standard water quality indexes of the culture pond and each processing pond are preset in the decision unit, and the processing decisions are sent to the action unit. The system can efficiently remove ammonia nitrogen in the aquaculture wastewater, automatically monitor and regulate water quality in real time, ensure that water in the aquaculture pond meets the requirement of aquatic product growth, reduce the working strength of workers and improve the working efficiency.
Description
Technical Field
The invention belongs to the technical field of aquaculture, and particularly relates to an intelligent circulation treatment system for aquaculture wastewater.
Background
The good water quality is a necessary condition for living and growing aquatic products, in order to provide water bodies meeting requirements for water products, the aquaculture in China adopts a large-scale drainage mode at present, a large amount of water resources are consumed, a large amount of aquaculture wastewater is generated, the aquaculture wastewater is directly discharged into the environment, environmental pollution is easily caused, a large amount of investment is needed in the early stage when the aquaculture wastewater is connected to a municipal pipe network system, and the municipal wastewater treatment is loaded.
In recent years, circulating water aquaculture systems with water saving, land saving and water saving have been studied
The characteristics of electricity and high density intensification, survival rate improvement, cultivation period shortening and controllable wastewater discharge meet the requirement of sustainable development, and are the development direction of the transformation of the future aquaculture mode. The aquaculture wastewater purification and circulation system applied at present usually processes aquaculture wastewater in an aquaculture pond in a sewage treatment mode and then flows back to the aquaculture pond, namely the aquaculture wastewater in the aquaculture pond sequentially passes through each treatment pond of sewage treatment and then circulates to the aquaculture pond again after reaching the water quality standard required by aquatic product growth, and the technical equipment used in the whole circulation process is only simple equipment, namely although in some cases, the equipment can monitor the water quality of the circulating water and obtain water quality data. However, when the working parameters are required to be correspondingly adjusted to cope with the change of the cultivation circulating water, the manual operation is still required. Not only the working strength of staff is high, and work efficiency is low, simultaneously, and when monitoring circulating water, the equipment can not control and adjust working parameters by oneself according to the water quality monitoring data that gathers and obtain, and it is unable data feedback and then automatic intelligent work that receive yet promptly.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide the intelligent circulation treatment system for the aquaculture wastewater, which can efficiently remove ammonia nitrogen in the aquaculture wastewater, automatically monitor and regulate water quality in real time, ensure that the water in the aquaculture pond meets the requirements of aquatic product growth, reduce the working intensity of workers and improve the working efficiency.
The technical scheme of the invention is realized as follows:
the intelligent circulation treatment system for the aquaculture wastewater is characterized by comprising a water treatment system and a control system, wherein the water treatment system comprises a culture pond, and sequentially comprises a filter tank, a regulating pond, a primary filter tank, a biochemical reaction tank, a biological filter tank and a disinfection tank along the water flow direction, wherein the filter tank is arranged in the regulating pond and is positioned at the top of the regulating pond, and is communicated with the culture pond, so that the aquaculture wastewater in the culture pond is convenient to flow through the filter tank and then flows into the regulating pond, and the filter tank is used for intercepting excrement in the aquaculture wastewater; the water body overflow in the primary filter tank enters the biochemical reaction tank, the biochemical reaction tank is communicated with the bottom of the biological filter tank, the water body overflow in the biological reaction tank enters the biological filter tank, the bottom of the biological filter tank is communicated with the bottom of the disinfection tank, the water body in the biological filter tank enters the disinfection tank, a water outlet is formed in the disinfection tank, and the water outlet is connected with a drain pipe for discharging the disinfected water body into the aquaculture tank.
The control system comprises a monitoring unit, a water quality index database, a judging unit, a decision unit and an action unit; the monitoring unit is used for monitoring water quality data in the culture pond and each treatment pond; the water quality database is used for storing water quality index control parameters of the culture pond and each treatment pond; the judging unit is connected with the monitoring unit and the water quality database, and is connected with the decision unit, and the judging unit is used for comparing the water quality data of the culture pond and each treatment pond monitored by the monitoring unit with corresponding water quality index control parameters stored in the water quality database and transmitting the water quality index exceeding the standard to the decision unit; the decision unit is connected with the action unit, processing decisions aiming at different out-of-standard water quality indexes of the culture pond and each processing pond are preset in the decision unit, and corresponding processing decisions are selected according to the information transmitted by the judgment unit and a command is sent to the action unit; the action unit is used for implementing corresponding processing measures according to the received processing decisions.
Further, the filter tank is internally provided with ceramsite with the particle size of 0.5-1.5 cm.
Further, a volcanic rock filler layer and a zeolite filler layer are arranged in the primary filter tank from bottom to top, and the thickness ratio of the volcanic rock filler layer to the zeolite filler layer is 1.5-2:1; the particle size of the zeolite filler selected by the zeolite filler layer is 0.8-2.0 cm, and the particle size of the volcanic filler selected by the volcanic filler layer is 1-3 cm.
Further, volcanic rock filler with the particle size of 2-3 cm is filled in the biochemical reaction tank, and aerobic denitrifying bacteria grow on the volcanic rock filler.
Further, the aerobic denitrifying bacteria are separated from aquaculture wastewater and are obtained through domestication culture.
Further, a first water distribution plate and a second water distribution plate are arranged above the biochemical reaction tank, the first water distribution plate and the second water distribution plate are arranged at intervals up and down and are obliquely arranged, the upper end of the first water distribution plate is horizontally arranged on the tank wall of the biochemical reaction tank at the side of the primary filter tank and is positioned below the overflow port of the primary filter tank, water in the primary filter tank is convenient to overflow onto the first water distribution plate, the upper end of the second water distribution plate is horizontally arranged on the tank wall of the biochemical reaction tank at the opposite side of the first water distribution plate, the lower end of the second water distribution plate is positioned below the first water distribution plate, and water on the first water distribution plate conveniently flows through the second water distribution plate and then flows into the biochemical reaction tank, so that the oxygen enrichment of the water is realized through two-stage water distribution.
Further, a first filler is filled in the biological reaction tank and used for planting submerged plants, the first filler is formed by mixing quartz sand with the particle size of 0.4-0.8 cm and gravel with the particle size of 1.0-2.0 cm according to the volume ratio of 1:1, and the height of the upper surface of the first filler from the water surface is 1-1.5 m; the submerged plant is one or more of Sargassum, sargassum horneri, herba Sonchi Oleracei and herba Eichhorniae.
Further, a second filler is filled in the biological filter tank and used for planting emergent aquatic plants, and the second filler is formed by mixing quartz sand with the particle size of 0.4-0.8 cm and medical stone with the particle size of 1.0-2.0 cm according to the volume ratio of 1:1; the emergent aquatic plant is one or more of canna, graptopetalum album, calamus and cane shoots.
Further, an ultraviolet lamp is arranged above the disinfection tank and is used for disinfecting the water body in the disinfection tank; the disinfection pond has the return port, the return port is connected with the back flow, the back flow is with disinfection pond and equalizing basin intercommunication, the water backward flow in the disinfection pond of being convenient for to the equalizing basin.
Further, the water quality data includes data of one or more of pH, DO, ammonia nitrogen, COD, total nitrogen, total phosphorus, and temperature; the action unit comprises a temperature control module, a water pump control module, a dosing pump control module, a flow control module, a valve control module and an aeration control module, wherein the temperature control module is used for controlling the on-off and power of heating equipment, the water pump control module is used for controlling the on-off, running time and power of a water pump, the dosing pump control module is used for controlling dosing dosage, the flow control module is used for controlling the flow of each treatment pool, the valve control module is used for controlling the on-off of a connecting pipeline valve between each treatment pool, and the aeration control module is used for controlling the on-off and running power of aeration equipment; the culture pond, the regulating pond, the primary filter pond and the biochemical reaction pond are all provided with temperature control modules; the water pump control modules are arranged in the culture pond and the disinfection pond; the culture pond, the regulating pond, the primary filter pond, the biochemical reaction pond, the biological filter pond and the disinfection pond are all provided with a valve control module and a flow control module; a dosing pump control module is arranged in the regulating tank; the culture pond and the primary filter pond are provided with aeration control modules.
Compared with the prior art, the invention has the following beneficial effects:
1. the invention can monitor and regulate the water quality of the water body in real time through precise automatic control, ensures that the water body in the culture pond meets the requirement of aquatic product growth, is beneficial to promoting the aquatic product growth, can reduce the working strength of staff and improves the working efficiency.
2. The method can efficiently remove ammonia nitrogen in the aquaculture wastewater, realize the purification cycle of the water body, and prevent the aquaculture wastewater from entering the environment and polluting the environment.
3. According to the invention, impurities such as feces and the like in the wastewater are filtered in the filter tank, and the water quality is stable in the regulating tank; in the primary filter tank, the filling is mainly enriched with indigenous heterotrophic microorganisms and nitrifying bacteria in the culture water body, so that COD and ammonia nitrogen in the water body are primarily removed, and a small amount of total nitrogen and total phosphorus are removed through adsorption; then aerobic denitrifying bacteria are pre-cultured on the filler in the biochemical reaction tank, so that COD and nitrate nitrogen in the water discharged from the primary filter tank are efficiently degraded, further removal of COD and total nitrogen is realized, and meanwhile, partial nitrifying bacteria are enriched on the filler in long-term operation, so that ammonia nitrogen in the water is further removed; then in a biological reaction tank, the plants such as the goldfish algae, the foxtail algae and the like further realize the removal of COD, ammonia nitrogen, nitrate nitrogen and total phosphorus; in the biological filter tank, the emergent aquatic plants further remove COD, ammonia nitrogen, nitrate nitrogen and total phosphorus remained in the biological reaction tank, and a filler layer of the biological filter tank intercepts planktonic microorganisms in the water body while adsorbing partial nutrient substances, so that the microbial load entering the disinfection tank is reduced; in the disinfection pond, ultraviolet rays are adopted for disinfection and sterilization, and the water quality required by the growth of the aquatic products is discharged to the cultivation pond. The primary filter tank and the biochemical reaction tank mainly realize partial removal of COD and total nitrogen, the biological reaction tank and the biological filter tank further remove COD and total nitrogen and simultaneously deeply remove phosphorus, the four tanks cooperate to realize efficient removal of COD and nitrogen and phosphorus, the water quality is ensured to reach the standard after disinfection and sterilization by the disinfection tank, and the purification cycle of aquaculture wastewater is realized.
4. The aerobic denitrifying bacteria adopted by the invention are separated from the raw aquaculture wastewater and are obtained by domestication and culture, so that the aerobic denitrifying bacteria have good natural adaptability to the aquaculture wastewater, and are beneficial to improving the wastewater treatment efficiency.
5. According to the invention, the first water distribution plate and the second water distribution plate are adopted to realize two-stage drop aeration, so that the dissolved oxygen in sewage is effectively improved, the effective implementation of an aerobic reaction is ensured, and meanwhile, aeration equipment is not required, so that the treatment cost is reduced.
Drawings
FIG. 1-schematic structural view of a water treatment system according to the present invention.
Fig. 2-schematic structural diagram of the control system of the present invention.
Wherein: 1-a filter tank; 2-an adjusting tank; 3-a primary filter tank; 31-a first volcanic filler layer; 32-zeolite filler layer; 4-a biochemical reaction tank; 41-a second volcanic filler layer; 42-a first water distribution plate; 43-a second water distribution plate; 5-a biological reaction tank; 51-a first filler; 5-submerged plants; 6-a biological filter tank; 61-a second filler; 62-emergent aquatic plants; 7-a disinfection tank; 71-ultraviolet lamp; 8-a culture pond.
Detailed Description
The invention is described in further detail below with reference to the drawings and the detailed description.
The intelligent circulation treatment system for the aquaculture wastewater comprises a water treatment system and a control system, wherein the intelligent circulation treatment system comprises a culture pond 8, and sequentially comprises a filter tank 1, a regulating pond 2, a primary filter tank 3, a biochemical reaction pond 4, a biological reaction pond 5, a biological filter pond 6 and a disinfection pond 7 along the water flow direction, wherein the filter tank 1 is arranged in the regulating pond 2 and is positioned at the top of the regulating pond 2, the filter tank 1 is communicated with the culture pond 8, so that the aquaculture wastewater in the culture pond 8 conveniently flows through the filter tank 1 and then flows into the regulating pond 2, and the filter tank 1 is used for intercepting excrement in the aquaculture wastewater; the water body in the primary filter tank 3 overflows into the biochemical reaction tank 4, the biochemical reaction tank 4 and the biological reaction tank 5, the biological filter tank 6 and the disinfection tank 7 are sequentially and closely arranged, the bottom of the regulating tank 2 is communicated with the bottom of the primary filter tank 3, the water body in the regulating tank 2 conveniently enters the primary filter tank 3, the water body in the primary filter tank 3 overflows into the biochemical reaction tank 4, the bottom of the biochemical reaction tank 4 is communicated with the bottom of the biological reaction tank 5, the water body in the biochemical reaction tank 4 conveniently enters the biological reaction tank 5, the water body in the biological reaction tank 5 overflows into the biological filter tank 6, the bottom of the biological filter tank 6 is communicated with the bottom of the disinfection tank 7, the water body in the biological filter tank 6 conveniently enters the disinfection tank 7, and a water outlet is arranged on the disinfection tank 7 and is connected with a drain pipe so as to drain the disinfected water body into the aquaculture tank.
The control system comprises a monitoring unit, a water quality index database, a judging unit, a decision unit and an action unit; the monitoring unit is used for monitoring water quality data in the culture pond 8 and each treatment pond; the water quality database is used for storing water quality index control parameters of the culture pond and each treatment pond; the judging unit is connected with the monitoring unit and the water quality database, and is connected with the decision unit, and the judging unit is used for comparing the water quality data of the culture pond and each treatment pond monitored by the monitoring unit with corresponding water quality index control parameters stored in the water quality database and transmitting the water quality index exceeding the standard to the decision unit; the decision unit is connected with the action unit, processing decisions aiming at different out-of-standard water quality indexes of the culture pond and each processing pond are preset in the decision unit, and corresponding processing decisions are selected according to the information transmitted by the judgment unit and a command is sent to the action unit; the action unit is used for implementing corresponding processing measures according to the received processing decisions.
The arrow direction in fig. 1 is the water flow direction. The aquaculture wastewater in the culture pond is treated by the filter tank, the regulating tank, the primary filter tank, the biochemical reaction tank, the biological filter tank and the disinfection tank and then circularly flows back to the culture pond, so that the purification and circulation of the aquaculture wastewater are realized. In the embodiment, the bottom of the adjusting tank and the bottom of the primary filter tank are provided with connecting pipes for communicating the adjusting tank and the primary filter tank, the bottom of the biochemical reaction tank and the bottom of the biological reaction tank are provided with connecting pipes for communicating the biochemical reaction tank and the biological reaction tank, and the bottom of the biological filter tank and the bottom of the disinfection tank are communicated with each other through the connecting pipes.
In specific implementation, the filter tank is internally provided with ceramsite with the particle size of 0.5-1.5 cm.
The haydite can effectively intercept impurities such as excrement and urine in aquaculture wastewater, and is beneficial to subsequent wastewater treatment.
In the concrete implementation, a first volcanic rock filler layer 31 and a zeolite filler layer 32 are arranged in the primary filter tank 3 from bottom to top, and the thickness ratio of the first volcanic rock filler layer 31 to the zeolite filler layer 32 is 1.5-2:1; the particle size of the volcanic rock filler selected for the first volcanic rock filler layer 31 is 1-3 cm, and the particle size of the zeolite filler selected for the zeolite filler layer 32 is 0.8-2.0 cm.
The volcanic rock filler has good permeability and large specific surface area, is favorable for fixing and film formation of microorganisms, and is favorable for adsorption and film formation of heterotrophic bacteria when placed on the lower layer of the primary filter tank, so that the COD in water is effectively reduced; the zeolite filler has good selective adsorption property on ammonia nitrogen, partial ammonia nitrogen in water can be intercepted through adsorption, meanwhile, the COD concentration in water is reduced after being treated by the first volcanic filler layer, the competitive advantage of heterotrophic bacteria in the zeolite filler layer relative to nitrifying bacteria is reduced, nitrifying bacteria in the zeolite layer occupy certain abundance, and degradation of the ammonia nitrogen adsorbed by the zeolite layer and the ammonia nitrogen in the water can be realized, so that partial ammonia nitrogen in the water is reduced, and the ammonia nitrogen and the nitrite nitrogen are converted. Meanwhile, volcanic rock and zeolite filler can absorb a small amount of phosphate, so that a small amount of total phosphorus is primarily reduced.
In specific implementation, the biochemical reaction tank 4 is filled with volcanic filler with a particle size of 2-3 cm, so as to form a second volcanic filler layer 41, and aerobic denitrifying bacteria grow on the volcanic filler in the second volcanic filler layer.
The volcanic rock filler has high porosity, large specific surface area and rough and porous surface, is beneficial to film formation and nutrient transmission of aerobic denitrifying bacteria, and ensures oxygen mass transfer and avoids blockage due to the larger particle size
The aerobic denitrifying bacteria have heterotrophic nitrification and aerobic denitrification capability, COD and nitrate nitrogen can be further degraded in the biochemical reaction tank, and meanwhile, the biochemical reaction tank is in an aerobic environment and is beneficial to the coexistence of nitrifying bacteria, so that the simultaneous performance of nitrification and denitrification processes is realized, and further effective denitrification is realized. Before the aquaculture wastewater is introduced into the purification and circulation system, aerobic denitrifying bacteria are added into the biochemical reaction tank in advance, so that the aerobic denitrifying bacteria are formed on the volcanic rock filler of the second volcanic filler layer.
In specific implementation, the aerobic denitrifying bacteria are separated from aquaculture wastewater and are obtained through domestication culture.
The aerobic denitrifying bacteria are separated from the raw aquaculture wastewater and are obtained through domestication and culture, so that the aerobic denitrifying bacteria have good natural adaptability to the aquaculture wastewater.
In specific implementation, a first water distribution plate 42 and a second water distribution plate 43 are arranged above the biochemical reaction tank 4, the first water distribution plate 42 and the second water distribution plate 43 are vertically arranged at intervals and are obliquely arranged, the upper end of the first water distribution plate 42 is horizontally arranged on the tank wall of the biochemical reaction tank 4 at the side of the primary filter tank 3 and below the overflow port of the primary filter tank 3, water in the primary filter tank 3 is convenient to overflow onto the first water distribution plate 42, the upper end of the second water distribution plate 43 is horizontally arranged on the tank wall of the biochemical reaction tank 4 at the opposite side of the first water distribution plate 42, the lower end of the second water distribution plate 43 is arranged below the first water distribution plate 42, and water on the first water distribution plate 42 conveniently flows through the second water distribution plate 43 and then flows into the biochemical reaction tank 4, so that the oxygen enrichment of the water is realized through two-stage water distribution.
Like this, the water overflow tiling in the primary filter tank flows through first water distribution board, then flows through the second water distribution board, flows into the biochemical reaction tank at last, and in this process, the area of contact of water and air increases for in the oxygen entering water in the air, increased the dissolved oxygen volume of water, make the water oxygen boosting in biochemical reaction tank, the biochemical reaction tank is in good oxygen environment, thereby need not use aeration equipment to aerate the water, reduced waste water treatment cost.
In specific implementation, a first filler 51 is filled in the biological reaction tank 5 and is used for planting submerged plants 52, the first filler 51 is formed by mixing quartz sand with the particle size of 0.4-0.8 cm and gravel with the particle size of 1.0-2.0 cm according to the volume ratio of 1:1, and the height of the upper surface of the first filler 51 from the water surface is 1-1.5 m; the submerged plant 52 is one or more of Sargassum, sargassum horneri, herba Sonchi Oleracei and herba Eichhorniae.
The quartz sand and gravel with smaller particle size are mixed to serve as the first filler, so that the submerged plant is stabilized, the filter and interception effect on microorganisms in water is achieved, and the reduction of the number of plankton bacteria in the water is facilitated. The height from the first filler to the water surface is controlled to ensure that certain illumination intensity enters the biological reaction tank so as to provide illumination intensity required by photosynthesis for submerged plants and meet the requirement of growth of the submerged plants. The interval between the submerged plants is 30cm, and the submerged plants are planted in the biological reaction tank in a mixed planting mode of two or more submerged plants.
In specific implementation, the biological filter tank 6 is filled with a second filler 61 for planting emergent aquatic plants 62, and the second filler 61 is formed by mixing quartz sand with the particle size of 0.4-0.8 cm and medical stone with the particle size of 1.0-2.0 cm according to the volume ratio of 1:1; the emergent aquatic plant 62 is one or more of canna, graptopetalum album, calamus and cane shoots.
The quartz sand with smaller grain size and the medical stone are mixed to be used as the second filler, which is beneficial to stabilizing rhizomes of emergent aquatic plants, meanwhile, after the treatment of the previous treatment procedure, the content of microelements in the water is very limited, and the medical stone can dissolve microelements in the water, thus providing necessary microelement basis for the growth of emergent aquatic plants in the biological filter tank.
In the embodiment, the planting distance of emergent aquatic plants is 40cm, and the submerged plants are planted in the biological filter tank in a mode of mixed planting of two or more emergent aquatic plants.
In specific implementation, an ultraviolet lamp 71 is arranged above the disinfection tank 7 and is used for disinfecting the water body in the disinfection tank 7; the disinfection pond 7 has the return port, the return port is connected with the back flow, the back flow communicates disinfection pond 7 and equalizing basin 2, and the water backward flow in the disinfection pond 7 of being convenient for is to equalizing basin 2.
When the concentration of the culture wastewater entering the system is too high, the water body after being treated by the part of disinfection tanks flows back to the regulating tank, so that the effect of diluting and stabilizing the water quality can be achieved, and the water quality of the whole water outlet of the system is prevented from being reduced due to too high concentration water inlet.
In particular embodiments, the water quality data includes data for one or more of pH, DO, ammonia nitrogen, COD, total nitrogen, total phosphorus, and temperature. Correspondingly, the water quality database stores water quality control parameters of one or more of pH, DO, ammonia nitrogen, COD, total nitrogen, total phosphorus and temperature in the culture pond and each treatment pond.
When the device is specifically implemented, the action unit comprises a temperature control module, a water pump control module, a dosing pump control module, a flow control module, a valve control module and an aeration control module, wherein the temperature control module is used for controlling the on-off and the power of heating equipment, the water pump control module is used for controlling the on-off, the running time and the power of a water pump, the dosing pump control module is used for controlling the dosing amount, the flow control module is used for controlling the flow of each treatment tank, the valve control module is used for controlling the on-off of a connecting pipeline valve between each treatment tank, and the aeration control module is used for controlling the on-off and the running power of aeration equipment; the culture pond, the regulating pond, the primary filter pond and the biochemical reaction pond are all provided with temperature control modules; the water pump control modules are arranged in the culture pond and the disinfection pond; the culture pond, the regulating pond, the primary filter pond, the biochemical reaction pond, the biological filter pond and the disinfection pond are all provided with a valve control module and a flow control module; a dosing pump control module is arranged in the regulating tank; the culture pond and the primary filter pond are provided with aeration control modules.
The temperature control module controls heating equipment of the culture pond, the regulating pond 2, the primary filter pond 3, the biochemical reaction pond 4 and the disinfection pond 7, the heating equipment is positioned at the bottom of the water body in the treatment pond, and the heating equipment is opened and closed according to the command of the decision unit so as to maintain the proper temperature of the water body in each treatment pond. When the temperature in one or more treatment tanks is not in a proper range, the temperature control module starts the heating device, and after the temperature in the treatment tanks reaches the proper range, the temperature control module closes the corresponding heating device.
The water pump control module controls the on-off, running time and power of the water pump in the culture pond and the disinfection pond 7, is positioned at the bottoms of the culture pond and the disinfection pond, and controls the water flow exchange among the treatment ponds. The valve control module is used for controlling the opening and closing of the connecting pipeline valves among the treatment tanks. The flow control module is used for counting the flow entering and exiting each treatment pool.
The regulating tank 2 is internally provided with a dosing pump control module to control the pH regulating medicament dosage equipment, and when the pH in the regulating tank 2 is not in a proper range, the equipment is used for adding a proper amount of pH regulating medicament.
The aeration control module is used for controlling the switching and running power of the aeration equipment, the aeration equipment is an air compressor, and the aeration head is positioned at the bottoms of the culture pond and the primary filter pond 3.
The primary filter tank 3 is provided with DO and ammonia nitrogen monitoring devices, the aeration equipment is started only when the DO and the ammonia nitrogen in the upper wastewater of the primary filter tank 3 exceed a set range, the water inlet and outlet valves of the primary filter tank 3 are closed, the aeration is stopped after the DO in the upper wastewater reaches the set range, and the water inlet and outlet valves of the primary filter tank 3 are started after the ammonia nitrogen concentration reaches the set range.
The disinfection pond 7 is internally provided with a COD, total nitrogen and total phosphorus monitoring device, when one or more indexes exceed the standard, the decision system closes the water valve and the water pump of the disinfection pond 7 and the cultivation pond 1, and the water valve and the water pump of the cultivation pond 1 and the water pump of the regulation pond 2 according to the setting, simultaneously opens the reflux water valve and the water pump of the disinfection pond 7 and the regulation pond 2, regulates and controls the reflux of a proper amount of water in the disinfection pond 7 to the regulation pond 2, and opens the water valve and the water pump of the disinfection pond 7 and the cultivation pond 1, and the water valve and the water pump of the cultivation pond 1 and the water pump of the regulation pond 2 when the COD, the total nitrogen and the total phosphorus reach the standard after the internal circulation treatment of the system, and closes the reflux water valve and the water pump of the disinfection pond 7 and the regulation pond 2.
Finally, it should be noted that the above-mentioned examples of the present invention are only illustrative of the present invention and are not limiting of the embodiments of the present invention. Other variations and modifications of the present invention will be apparent to those of ordinary skill in the art in light of the foregoing description. Not all embodiments are exhaustive. Obvious changes and modifications which are extended by the technical proposal of the invention are still within the protection scope of the invention.
Claims (5)
1. The intelligent circulation treatment system for the aquaculture wastewater is characterized by comprising a water treatment system and a control system, wherein the water treatment system comprises a culture pond, and sequentially comprises a filter tank, a regulating pond, a primary filter tank, a biochemical reaction tank, a biological filter tank and a disinfection tank along the water flow direction, wherein the filter tank is arranged in the regulating pond and is positioned at the top of the regulating pond, and is communicated with the culture pond, so that the aquaculture wastewater in the culture pond is convenient to flow through the filter tank and then flows into the regulating pond, and the filter tank is used for intercepting excrement in the aquaculture wastewater; the water body in the primary filter tank overflows into the biochemical reaction tank, the bottom of the biochemical reaction tank is communicated with the bottom of the biological filter tank, the water body in the biochemical reaction tank overflows into the biological filter tank, the water body in the biological reaction tank overflows into the biological filter tank, the bottom of the biological filter tank is communicated with the bottom of the disinfection tank, the water body in the biological filter tank enters into the disinfection tank, a water outlet is formed in the disinfection tank, and the water outlet is connected with a drain pipe so as to discharge the disinfected water body into the aquaculture tank;
the primary filter tank is internally provided with a volcanic rock filler layer and a zeolite filler layer from bottom to top, and the thickness ratio of the volcanic rock filler layer to the zeolite filler layer is 1.5-2:1; the particle size of the zeolite filler selected by the zeolite filler layer is 0.8-2.0 cm, and the particle size of the volcanic filler selected by the volcanic filler layer is 1-3 cm;
volcanic rock filler with the particle size of 2-3 cm is filled in the biochemical reaction tank, and aerobic denitrifying bacteria grow on the volcanic rock filler;
the upper part of the biochemical reaction tank is provided with a first water distribution plate and a second water distribution plate which are vertically spaced and are obliquely arranged, the upper end of the first water distribution plate is horizontally arranged on the tank wall of the biochemical reaction tank at the side of the primary filter tank and positioned below the overflow port of the primary filter tank, so that water in the primary filter tank overflows onto the first water distribution plate, the upper end of the second water distribution plate is horizontally arranged on the tank wall of the biochemical reaction tank at the opposite side of the first water distribution plate, and the lower end of the second water distribution plate is positioned below the first water distribution plate, so that water on the first water distribution plate conveniently flows through the second water distribution plate and then flows into the biochemical reaction tank, and the oxygen enrichment of the water is realized through two-stage water distribution;
the biological reaction tank is filled with a first filler for planting submerged plants, the first filler is formed by mixing quartz sand with the particle size of 0.4-0.8 cm and gravel with the particle size of 1.0-2.0 cm according to the volume ratio of 1:1, and the height of the upper surface of the first filler from the water surface is 1-1.5 m; the submerged plant is one or more of bromhidrosis, goldfish algae, herba Sonchi Oleracei and herba Onchi Oleracei;
the biological filter tank is filled with a second filler for planting emergent aquatic plants, and the second filler is formed by mixing quartz sand with the particle size of 0.4-0.8 cm and medical stone with the particle size of 1.0-2.0 cm according to the volume ratio of 1:1; the emergent aquatic plants are one or more of canna, graptopetalum album, calamus and cane shoots;
the control system comprises a monitoring unit, a water quality index database, a judging unit, a decision unit and an action unit; the monitoring unit is used for monitoring water quality data in the culture pond and each treatment pond; the water quality index database is used for storing water quality index control parameters of the culture pond and each treatment pond; the judging unit is connected with the monitoring unit and the water quality index database, and is connected with the decision unit, and the judging unit is used for comparing the water quality data of the culture pond and each treatment pond monitored by the monitoring unit with the corresponding water quality index control parameters stored in the water quality index database and transmitting the water quality index exceeding the standard to the decision unit; the decision unit is connected with the action unit, processing decisions aiming at different out-of-standard water quality indexes of the culture pond and each processing pond are preset in the decision unit, and corresponding processing decisions are selected according to the information transmitted by the judgment unit and a command is sent to the action unit; the action unit is used for implementing corresponding processing measures according to the received processing decisions.
2. The intelligent circulation treatment system for aquaculture wastewater according to claim 1, wherein the filter tank is internally provided with ceramsite with a particle size of 0.5-1.5 cm.
3. The intelligent circulation system for aquaculture wastewater according to claim 1, wherein said aerobic denitrifying bacteria are separated from aquaculture wastewater and are obtained by acclimation culture.
4. The intelligent circulation treatment system for aquaculture wastewater according to claim 1, wherein an ultraviolet lamp is arranged above the disinfection tank for disinfecting a water body in the disinfection tank; the disinfection pond has the return port, the return port is connected with the back flow, the back flow is with disinfection pond and equalizing basin intercommunication, the water backward flow in the disinfection pond of being convenient for to the equalizing basin.
5. The intelligent circulation system of aquaculture wastewater according to claim 1 wherein said water quality data comprises data of one or more of pH, DO, ammonia nitrogen, COD, total nitrogen, total phosphorus and temperature; the action unit comprises a temperature control module, a water pump control module, a dosing pump control module, a flow control module, a valve control module and an aeration control module, wherein the temperature control module is used for controlling the on-off and power of heating equipment, the water pump control module is used for controlling the on-off, running time and power of a water pump, the dosing pump control module is used for controlling dosing dosage, the flow control module is used for controlling the flow of each treatment pool, the valve control module is used for controlling the on-off of a connecting pipeline valve between each treatment pool, and the aeration control module is used for controlling the on-off and running power of aeration equipment; the culture pond, the regulating pond, the primary filter pond and the biochemical reaction pond are all provided with temperature control modules; the water pump control modules are arranged in the culture pond and the disinfection pond; the culture pond, the regulating pond, the primary filter pond, the biochemical reaction pond, the biological filter pond and the disinfection pond are all provided with a valve control module and a flow control module; a dosing pump control module is arranged in the regulating tank; the culture pond and the primary filter pond are provided with aeration control modules.
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