CN115572017A - Internal circulation method and system for aquaculture tail water - Google Patents
Internal circulation method and system for aquaculture tail water Download PDFInfo
- Publication number
- CN115572017A CN115572017A CN202211362410.1A CN202211362410A CN115572017A CN 115572017 A CN115572017 A CN 115572017A CN 202211362410 A CN202211362410 A CN 202211362410A CN 115572017 A CN115572017 A CN 115572017A
- Authority
- CN
- China
- Prior art keywords
- water
- cavity
- anaerobic
- water outlet
- aerobic
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 211
- 238000009360 aquaculture Methods 0.000 title claims abstract description 45
- 244000144974 aquaculture Species 0.000 title claims abstract description 45
- 238000000034 method Methods 0.000 title claims abstract description 23
- 238000005273 aeration Methods 0.000 claims abstract description 26
- 238000000926 separation method Methods 0.000 claims abstract description 5
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 37
- 229910052760 oxygen Inorganic materials 0.000 claims description 37
- 239000001301 oxygen Substances 0.000 claims description 37
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 22
- 239000000945 filler Substances 0.000 claims description 18
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 16
- 239000004005 microsphere Substances 0.000 claims description 11
- 229910052757 nitrogen Inorganic materials 0.000 claims description 11
- 238000004659 sterilization and disinfection Methods 0.000 claims description 9
- 239000000126 substance Substances 0.000 claims description 8
- 125000004122 cyclic group Chemical group 0.000 claims description 6
- 238000010992 reflux Methods 0.000 claims description 6
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims description 5
- 229910052698 phosphorus Inorganic materials 0.000 claims description 5
- 239000011574 phosphorus Substances 0.000 claims description 5
- 229910052799 carbon Inorganic materials 0.000 claims description 4
- 239000003795 chemical substances by application Substances 0.000 claims description 4
- 239000000725 suspension Substances 0.000 claims description 4
- 238000007599 discharging Methods 0.000 claims description 3
- 238000001556 precipitation Methods 0.000 claims description 2
- 230000001954 sterilising effect Effects 0.000 claims description 2
- 230000000249 desinfective effect Effects 0.000 claims 1
- 238000004064 recycling Methods 0.000 abstract description 2
- 239000010865 sewage Substances 0.000 description 16
- 244000005700 microbiome Species 0.000 description 12
- 239000003344 environmental pollutant Substances 0.000 description 8
- 238000006213 oxygenation reaction Methods 0.000 description 8
- 231100000719 pollutant Toxicity 0.000 description 8
- 230000001965 increasing effect Effects 0.000 description 7
- 230000000694 effects Effects 0.000 description 6
- 241000894006 Bacteria Species 0.000 description 4
- MMDJDBSEMBIJBB-UHFFFAOYSA-N [O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O.[NH6+3] Chemical compound [O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O.[NH6+3] MMDJDBSEMBIJBB-UHFFFAOYSA-N 0.000 description 4
- 238000004062 sedimentation Methods 0.000 description 4
- 239000002893 slag Substances 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 3
- 238000005265 energy consumption Methods 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 238000000746 purification Methods 0.000 description 3
- 206010021143 Hypoxia Diseases 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000006731 degradation reaction Methods 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 239000002028 Biomass Substances 0.000 description 1
- 241001465754 Metazoa Species 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 230000001112 coagulating effect Effects 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000029087 digestion Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 239000002207 metabolite Substances 0.000 description 1
- 230000000813 microbial effect Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000006396 nitration reaction Methods 0.000 description 1
- 235000015097 nutrients Nutrition 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 238000004544 sputter deposition Methods 0.000 description 1
- 241001148471 unidentified anaerobic bacterium Species 0.000 description 1
Images
Classifications
-
- 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
-
- 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
-
- 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
- C02F1/58—Treatment of water, waste water, or sewage by removing specified dissolved compounds
-
- 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
- C02F2101/105—Phosphorus compounds
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/30—Aerobic and anaerobic processes
Abstract
The invention relates to an aquaculture tail water internal circulation method and a system, comprising a water inlet pipe, a treatment mechanism, an aeration mechanism and a water outlet pipe; the treatment mechanism comprises an outer shell, an inner barrel is arranged in the outer shell, an aerobic cavity is arranged in the inner barrel, the outer shell and the inner barrel are divided into an anoxic cavity and an anaerobic cavity by a separation barrel, the upper end of the aerobic cavity is communicated with the upper end of the anoxic cavity, and the lower end of the anoxic cavity is communicated with the lower end of the anaerobic cavity; the aeration mechanism comprises a water outlet disc, a reservoir is arranged below the water outlet disc, and a water drop aeration interval is arranged between the water outlet disc and the reservoir; the water inlet pipe is provided with a water inlet pump and is connected with the lower end of the aerobic cavity, the upper end of the anaerobic cavity is connected with the water outlet tray, the upper end of the anaerobic cavity is connected with the water inlet pipe through a return pipe, and the return pipe is provided with a return pump; the water outlet pipe is connected with the water reservoir. The invention has small floor area and low operation cost, and can realize the recycling of aquaculture water.
Description
Technical Field
The invention belongs to the technical field of water treatment, and particularly relates to an internal circulation method and system for aquaculture tail water.
Background
In the industrial aquaculture process, the fed feed can generate residual feed, excrement, metabolites and the like after being ingested, absorbed and utilized by the aquaculture animals, and in the degradation process of the substances, the concentration of organic matters in the aquaculture water is increased, the total amount of nitrogen and phosphorus is correspondingly increased, and certain adverse effects can be generated no matter the feed is used for circulating water aquaculture or is discharged outside. In the culture process, because of continuous aeration and oxygenation, pollutants in effluent mainly comprise COD (chemical oxygen demand) and nitrate nitrogen, and TN (total nutrient) is mainly removed in the traditional aquaculture tail water treatment process mainly by ecological treatment, but for industrial culture with small floor area and high culture density, the cycle water using period is short, and the ecological treatment efficiency cannot meet the treatment requirement.
The invention with the application number of 201710927596.3 discloses an aquaculture sewage treatment method and an aquaculture sewage comprehensive treatment system, and the problems of large occupied area are also caused by the adoption of pool bodies such as a sewage collection pool, a bioreactor, an aeration regulating pool, a coagulating sedimentation pool and the like.
The invention application with the application number of 201711405023.0 discloses an aquatic product processing sewage treatment system which comprises a sewage collecting tank and a sewage treatment station; the sewage treatment station comprises an anaerobic tank, an aerobic tank and a sedimentation and filtration tank which are sequentially communicated, and the sewage collection tank is communicated with the anaerobic tank through a sewage adding pump and a pipeline; anaerobic bacteria for decomposing organic matters are cultured in the anaerobic tank, and the aerobic tank is communicated with an aeration device for dissolving oxygen into the tank; the upper end of the sedimentation and filtration tank is communicated with a discharge pipe; the sewage collecting tank is connected with a sewage source and is provided with a slag extractor, the slag extractor comprises a chain plate and a power assembly for driving the chain plate to rotate, and the chain plate is used for receiving the slag in the sewage source and driving the slag to be discharged. This processing system also has a problem of large floor space.
In addition, aquatic products tail water is through handling the back, can let in the pond once more to realize cyclic utilization, the water economy resource when letting in the pond, needs carry out aeration oxygenation to the tail water, makes the oxygen content in the tail water satisfy the requirement of intaking, and traditional aeration oxygenation mode adopts aeration equipment to aerate for setting up the aeration tank, and the running cost is higher.
Disclosure of Invention
The invention aims to solve the technical problem of providing an aquaculture tail water internal circulation method and system, which can ensure the water quality purification effect, reduce the occupied area, reduce the operation cost, realize the tail water cyclic utilization and save water resources.
In order to solve the problems, the technical scheme adopted by the invention is as follows: the aquaculture tail water internal circulation system comprises a water inlet pipe, a treatment mechanism, an aeration mechanism and a water outlet pipe;
the treatment mechanism comprises an outer shell, an inner barrel is arranged in the outer shell, an aerobic cavity is arranged in the inner barrel, a cavity between the outer shell and the inner barrel is divided into an anoxic cavity and an anaerobic cavity by a separation barrel, the upper end of the aerobic cavity is communicated with the upper end of the anoxic cavity, and the lower end of the anoxic cavity is communicated with the lower end of the anaerobic cavity; the aerobic cavity is internally provided with hollow microsphere suspended fillers, and the anoxic cavity and the anaerobic cavity are internally provided with activated carbon fillers;
the aeration mechanism comprises a water outlet disc, a reservoir is arranged below the water outlet disc, and a water drop aeration interval is arranged between the water outlet disc and the reservoir;
the water inlet pipe is provided with a water inlet pump and is connected with the lower end of the aerobic cavity, the upper end of the anaerobic cavity is connected with the water outlet tray, the upper end of the anaerobic cavity is connected with the water inlet pipe through a return pipe, and the return pipe is provided with a return pump; the water outlet pipe is connected with the reservoir.
Further, an ultraviolet disinfection device is arranged on the water outlet pipe.
Furthermore, the bottom plate of the water outlet tray is provided with a plurality of uniformly distributed water falling holes.
Furthermore, the adding amount of the hollow microsphere suspended filler is 20-30% of the effective volume of the aerobic cavity.
Furthermore, the adding amount of the active carbon filler is 40-60% of the effective volume of the anoxic cavity and the anaerobic cavity.
The internal circulation method of the tail water of the aquaculture comprises
Introducing aquaculture tail water into a water inlet pipe, wherein water at the upper part of an anaerobic cavity flows back to the water inlet pipe through a return pipe, is mixed with the tail water, sequentially passes through an aerobic cavity, an anoxic cavity and the anaerobic cavity and enters a water outlet tray, in the aerobic cavity, the oxygen content in the water is gradually reduced, part of COD in the water is degraded, and part of nitrogen is removed; in the anoxic cavity and the anaerobic cavity, organic matters and nitrogen in water are removed;
the water in the water outlet tray falls down to the reservoir, and oxygen in the air enters the water to improve the oxygen content;
and introducing water in the reservoir into aquaculture equipment to realize cyclic utilization.
Furthermore, the total time of the tail water staying in the aerobic cavity, the anoxic cavity and the anaerobic cavity is 2-3h.
Further, the quality of tail water is as follows: the temperature is more than or equal to 28 ℃, the pH is 7.0-8.0, the COD is less than or equal to 100mg/L, the TN is less than or equal to 15mg/L, the TP is less than or equal to 2mg/L, and the SS is less than or equal to 150mg/L.
Furthermore, the reflux ratio of the tail water is 100-200%.
And further, adding a chemical phosphorus removal agent into the water storage tank, discharging water from the water outlet pipe after precipitation, and sterilizing by using an ultraviolet disinfection device on the water outlet pipe.
The invention has the beneficial effects that: 1. the aerobic cavity, the anoxic cavity and the anaerobic cavity of the treatment mechanism are integrated in the outer shell, so that the treatment mechanism occupies a small area, and is particularly suitable for intensive aquaculture in factories. And the flow path of the tail water is snakelike, so that the tail water can stay in the treatment mechanism for a long enough time, and the treatment effect is ensured.
2. Aiming at the characteristics that the oxygen content of the tail water of aquaculture is rich and pollutants mainly comprise COD (chemical oxygen demand) and nitrate nitrogen, the tail water sequentially passes through an aerobic cavity, an anoxic cavity and an anaerobic cavity, the oxygen content is gradually reduced, in the aerobic cavity, part of organic matters are decomposed by aerobic microorganisms, denitrification reaction is mainly carried out in the anoxic and anaerobic environments, nitrogen and COD (chemical oxygen demand) in the sewage are removed, and the content of the pollutants in the tail water is reduced to meet the requirement of reutilization.
3. The hollow microsphere suspended filler is anoxic, so that the growth of denitrifying bacteria is facilitated, the effect of subsequent denitrification reaction is ensured, and meanwhile, the biomass attached to the activated carbon filler is large, so that the total nitrogen removal efficiency is enhanced.
4. Oxygenation is performed by falling water from a certain height, conventional aeration equipment is not needed, energy consumption is saved, and meanwhile, the oxygen concentration in tail water meets the aquaculture water inlet requirement, so that cyclic utilization is realized.
Drawings
FIG. 1 is a schematic of the present invention;
reference numerals: 1-water inlet pipe; 2-water outlet pipe; 3-outer shell; 4, an inner cylinder body; 5, isolating a cylinder; 6, an aerobic cavity; 7-anoxic chamber; 8, an anaerobic cavity; 9-hollow microsphere suspension filler; 10-activated carbon filler; 11-water outlet tray; 12, a reservoir; 13-ultraviolet disinfection device; 14-a water inlet pump; 15-a return pipe; 16-reflux pump.
Detailed Description
The invention is further illustrated by the following examples in conjunction with the drawings.
The invention discloses an aquaculture tail water internal circulation system, which comprises a water inlet pipe 1, a treatment mechanism, an aeration mechanism and a water outlet pipe 2 as shown in figure 1.
The inlet tube 1 is used for leading the aquaculture's tail water into processing mechanism, is provided with intake pump 14 on the inlet tube 1, and intake pump 14 provides into water power, and the drive tail water flows in processing mechanism.
The treatment mechanism is used for removing pollutants in tail water and specifically comprises an outer shell 3, an inner barrel 4 is arranged in the outer shell 3, an aerobic cavity 6 is arranged in the inner barrel 4, a water inlet pipe 1 is connected with the lower end of the aerobic cavity 6, a cavity between the outer shell 3 and the inner barrel 4 is divided into an anoxic cavity 7 and an anaerobic cavity 8 by a separation barrel 5, the upper end of the aerobic cavity 6 is communicated with the upper end of the anoxic cavity 7, and the lower end of the anoxic cavity 7 is communicated with the lower end of the anaerobic cavity 8; the aerobic cavity 6 is internally provided with a hollow microsphere suspension filler 9, and the anoxic cavity 7 and the anaerobic cavity 8 are internally provided with an activated carbon filler 10.
The shell body 3 can be a circular shell body and can be a square shell body, the inner cavity of the shell body 3 is divided into an aerobic cavity 6, an anoxic cavity 7 and an anaerobic cavity 8 which are sequentially communicated from inside to outside by an inner cylinder body 4 and a separation cylinder 5, and the aerobic cavity 6, the anoxic cavity 7 and the anaerobic cavity 8 are all used for decomposing pollutants in tail water through microorganisms. The outer shell 3 of the invention has small occupied area and saves space, and is particularly suitable for treating the tail water of intensive aquaculture in factories.
The traditional sewage is low in oxygen content, so that the treatment process comprises anaerobic treatment, anoxic treatment and aerobic treatment, wherein the aerobic treatment equipment needs aeration and oxygenation, and meanwhile, digestion liquid flows back to the anaerobic treatment equipment to remove total nitrogen. In the invention, because continuous aeration and oxygenation are needed in the aquaculture process, the water contains rich oxygen, which is beneficial to the growth of aerobic microorganisms and is not beneficial to the growth of anaerobic microorganisms, and the aerobic microorganisms can carry out nitration reaction to decompose nitrogen into nitrate nitrogen, therefore, the oxygen content in the aquaculture tail water is high, pollutants are mainly nitrate nitrogen which cannot be decomposed by the aerobic microorganisms, and COD (chemical oxygen demand) and the like exist at the same time. According to the characteristics of tail water, the invention adopts an aerobic cavity 6, an anoxic cavity 7 and an anaerobic cavity 8 which are communicated in sequence to treat the tail water. There is aerobic microorganism in the good oxygen chamber 6 for decompose COD etc. simultaneously, the oxygen in the in-process consumption aquatic of aerobic microorganism degradation COD for the oxygen concentration in the tail water reduces gradually, reaches oxygen deficiency, anaerobic state gradually, so that subsequent oxygen deficiency and anaerobic treatment. In order to improve the film forming effect, corresponding microbial agents can be put into the aerobic cavity 6, the anoxic cavity 7 and the anaerobic cavity 8 to promote the growth and the propagation of microorganisms.
The aerobic cavity 6 is internally provided with hollow microsphere suspended filler 9, the adding amount of the hollow microsphere suspended filler 9 is 20-30% of the effective volume of the aerobic cavity 6, and the effective volume is the volume of tail water in the aerobic cavity 6 in the operation process. Aerobic microorganisms are attached to the surfaces of the hollow microspheres, but the interiors of the hollow microspheres are in an anoxic environment, so that growth and propagation of denitrifying bacteria are facilitated, a part of denitrifying bacteria can be enriched, and a part of TN can be removed.
The adding amount of the active carbon filler 10 is 40-60% of the effective volume of the anoxic cavity 7 and the anaerobic cavity 8. The activated carbon filler 10 has strong adsorption capacity, can be used for a large number of microorganisms to grow, and improves the density of the microorganisms, so that most of TN and organic matters can be removed by the anoxic cavity 7 and the anaerobic cavity 8, and SS can be adsorbed.
The oxygen content of the treated water is very low, and the requirement of the oxygen content of the aquaculture inlet water is not met, so the water can be introduced into the aquaculture container again for recycling after oxygen increasing. The conventional oxygenation mode is to oxygenate oxygen into water by adopting aeration equipment, and the aeration equipment consumes electricity and has high energy consumption when in operation. In order to reduce energy consumption, the adopted aeration mechanism comprises a water outlet disc 11, a water storage tank 12 is arranged below the water outlet disc 11, and a water drop aeration interval is arranged between the water outlet disc 11 and the water storage tank 12. The upper end of the anaerobic cavity 8 is connected with the water outlet tray 11, the treated tail water enters the water outlet tray 11 and then falls into the reservoir 12 from the water outlet tray 11, in the falling process, the water can be fully contacted with the air, so that the oxygen in the air enters the water, and when the water falls onto the water surface of the reservoir 12, impact and sputtering are generated, and the oxygen is further contacted and mixed with the air, so that the oxygen content is improved. The drop aeration oxygenation mode does not need power equipment, does not consume electric energy, and has low operation cost. In order to improve the effect of falling and oxygen increasing, the bottom plate of the water outlet tray 11 is provided with a plurality of water falling holes which are uniformly distributed, tail water falls downwards from each water falling hole, the contact area between the tail water and air is increased, and therefore the oxygen increasing effect is improved.
The upper end of the anaerobic cavity 8 is connected with the water inlet pipe 1 through a return pipe 15 and is used for returning the denitrification liquid, a return pump 16 is arranged on the return pipe 15, and the return pump 16 is used for controlling the return proportion. When the reflux pump 16 drives the denitrification liquid to reflux, the flow of the tail water can be promoted, and the dissolved oxygen concentration in the anaerobic chamber 8 is low, so that the dissolved oxygen in partial water can be neutralized after being mixed with the tail water, and the dissolved oxygen concentration in the aerobic chamber 6 can be reduced.
The water outlet pipe 2 is used for discharging the treated water to the culture equipment, the water outlet pipe 2 is connected with the reservoir 12, and the water outlet pipe 2 is provided with an ultraviolet disinfection device 13. The ultraviolet disinfection device 13 can sterilize through ultraviolet rays, reduce the content of bacteria in water, and improve the safety of aquatic products.
The internal circulation method of the tail water of the aquaculture comprises
The aquaculture tail water is introduced into the water inlet pipe 1, the water on the upper part of the anaerobic cavity 8 flows back to the water inlet pipe 1 through the return pipe 15, and after being mixed with the tail water, the mixed tail water sequentially passes through the aerobic cavity 6, the anoxic cavity 7 and the anaerobic cavity 8 and enters the water outlet tray 11, in the aerobic cavity 6, the oxygen content in the water is gradually reduced, part of COD in the water is degraded, and part of nitrogen is removed; in the anoxic chamber 7 and the anaerobic chamber 8, carbon and nitrogen in the water are removed. Wherein the reflux ratio of the tail water at the upper part of the anaerobic cavity 8 is 100-200%.
The water in the water outlet tray 11 falls downwards to the reservoir 12, and oxygen in the air enters the water to improve the oxygen content;
the water in the reservoir 12 is pumped into aquaculture equipment to realize cyclic utilization.
The tail water flows upwards firstly, then flows downwards and then continues to flow upwards in the treatment mechanism, so that the snake-shaped flow is realized, the flow path is long, and the retention time of the sewage in the treatment mechanism can be ensured. In a preferred embodiment, the total time of the tail water staying in the aerobic chamber 6, the anoxic chamber 7 and the anaerobic chamber 8 is 2-3h.
According to the invention, tail water is introduced from the bottom of the treatment mechanism, and treated water is discharged from the top of the treatment mechanism, so that the discharged water has a certain height, and oxygen is increased in a falling manner, and thus, no additional aeration equipment is needed, and the whole system can be kept in operation only by providing tail water flowing power by the water inlet pump 14 and providing backflow power by the backflow pump 16, so that the continuous purification of the tail water is realized. The water inlet pipe 1 of the invention is connected with the bottom of one end of the cultivation equipment, and the water outlet pipe 2 is connected with the top of the other end of the cultivation equipment, thus realizing the circular purification and utilization of the cultivation water.
The invention has simple structure, the internal circulation system of the aquaculture tail water has simple structure, smaller volume and simple treatment flow, is only used for the circular treatment of the aquaculture tail water, and is not suitable for the sewage treatment with higher pollutant concentration, therefore, the concentration of the pollutants in the inlet water needs to be controlled, and particularly, the quality of the tail water is as follows: the temperature is more than or equal to 28 ℃, the pH is 7.0-8.0, the COD is less than or equal to 100mg/L, the TN is less than or equal to 15mg/L, the TP is less than or equal to 2mg/L, and the SS is less than or equal to 150mg/L.
In order to fully remove the phosphorus in the water, a chemical phosphorus removal agent can be added into the reservoir 12, the reservoir 12 also has a sedimentation tank, the SS can be removed after the tail water is precipitated, the water is discharged from the water outlet pipe 2, and the ultraviolet disinfection device 13 on the water outlet pipe 2 is used for sterilization and disinfection.
The tail water is treated by the process, and the removal rates of COD, TN, TP and SS in the tail water can reach 90%, 80% and 80% respectively.
The present invention has been described in terms of the preferred embodiment, and it is not intended to be limited to the embodiment. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. Aquaculture tail water internal circulation system which characterized in that: comprises a water inlet pipe (1), a treatment mechanism, an aeration mechanism and a water outlet pipe (2);
the treatment mechanism comprises an outer shell (3), an inner barrel (4) is arranged inside the outer shell (3), an aerobic cavity (6) is arranged inside the inner barrel (4), a cavity between the outer shell (3) and the inner barrel (4) is divided into an anoxic cavity (7) and an anaerobic cavity (8) by a separation barrel (5), the upper end of the aerobic cavity (6) is communicated with the upper end of the anoxic cavity (7), and the lower end of the anoxic cavity (7) is communicated with the lower end of the anaerobic cavity (8); a hollow microsphere suspension filler (9) is arranged in the aerobic cavity (6), and activated carbon fillers (10) are arranged in the anoxic cavity (7) and the anaerobic cavity (8);
the aeration mechanism comprises a water outlet disc (11), a reservoir (12) is arranged below the water outlet disc (11), and a water drop aeration interval is arranged between the water outlet disc (11) and the reservoir (12);
a water inlet pump (14) is arranged on the water inlet pipe (1) and is connected with the lower end of the aerobic cavity (6), the upper end of the anaerobic cavity (8) is connected with the water outlet tray (11), the upper end of the anaerobic cavity (8) is connected with the water inlet pipe (1) through a return pipe (15), and a return pump (16) is arranged on the return pipe (15); the water outlet pipe (2) is connected with the water storage tank (12).
2. The aquaculture tail water internal circulation system of claim 1, wherein: an ultraviolet disinfection device (13) is arranged on the water outlet pipe (2).
3. The aquaculture tail water internal circulation system of claim 1, wherein: the bottom plate of the water outlet tray (11) is provided with a plurality of uniformly distributed water falling holes.
4. The aquaculture tail water internal circulation system of claim 1, wherein: the adding amount of the hollow microsphere suspension filler (9) is 20-30% of the effective volume of the aerobic cavity (6).
5. The aquaculture tail water internal circulation system of claim 1, wherein: the adding amount of the active carbon filler (10) is 40-60% of the effective volume of the anoxic cavity (7) and the anaerobic cavity (8).
6. The internal circulation method of the aquaculture tail water is characterized in that: an aquaculture tail water internal circulation system adopting the method as claimed in claims 1 to 5, comprising
The aquaculture tail water is introduced into the water inlet pipe (1), the water at the upper part of the anaerobic cavity (8) flows back to the water inlet pipe (1) through the return pipe (15), and after being mixed with the tail water, the mixed water sequentially passes through the aerobic cavity (6), the anoxic cavity (7) and the anaerobic cavity (8) and enters the water outlet tray (11), in the aerobic cavity (6), the oxygen content in the water is gradually reduced, and part of COD in the water is degraded and part of nitrogen is removed; in the anoxic cavity (7) and the anaerobic cavity (8), organic matters and nitrogen in the water are removed;
the water in the water outlet tray (11) falls downwards to the water storage tank (12), and oxygen in the air enters the water to improve the oxygen content;
and water in the reservoir (12) is introduced into aquaculture equipment to realize cyclic utilization.
7. The aquaculture tail water internal circulation method of claim 6, wherein: the total time of the tail water staying in the aerobic cavity (6), the anoxic cavity (7) and the anaerobic cavity (8) is 2-3h.
8. The aquaculture tail water internal circulation method of claim 6, wherein: the quality of tail water is as follows: the temperature is more than or equal to 28 ℃, the pH is 7.0-8.0, the COD is less than or equal to 100mg/L, the TN is less than or equal to 15mg/L, the TP is less than or equal to 2mg/L, and the SS is less than or equal to 150mg/L.
9. The aquaculture tail water internal circulation method of claim 6, wherein: the reflux ratio of tail water is 100-200%.
10. The aquaculture tail water internal circulation method of claim 6, wherein: adding a chemical phosphorus removing agent into the reservoir (12), discharging water from the water outlet pipe (2) after precipitation, and sterilizing and disinfecting by using an ultraviolet disinfection device (13) on the water outlet pipe (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211362410.1A CN115572017A (en) | 2022-11-02 | 2022-11-02 | Internal circulation method and system for aquaculture tail water |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211362410.1A CN115572017A (en) | 2022-11-02 | 2022-11-02 | Internal circulation method and system for aquaculture tail water |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115572017A true CN115572017A (en) | 2023-01-06 |
Family
ID=84588509
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211362410.1A Pending CN115572017A (en) | 2022-11-02 | 2022-11-02 | Internal circulation method and system for aquaculture tail water |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115572017A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116535005A (en) * | 2023-06-29 | 2023-08-04 | 成都理工大学 | Intelligent synchronous nitrification and denitrification treatment system and method for domestic sewage |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104591500A (en) * | 2015-01-29 | 2015-05-06 | 北京万邦达环保技术股份有限公司 | Sewage treatment device for coking wastewater |
| KR20150064914A (en) * | 2013-12-04 | 2015-06-12 | 정석균 | Recirculating rearing system |
| CN109205789A (en) * | 2018-11-13 | 2019-01-15 | 中石化炼化工程（集团）股份有限公司 | A kind of biological aerated filter sewage-treatment plant and sewage disposal system |
| CN109626749A (en) * | 2019-01-22 | 2019-04-16 | 新乡市蓝海环境科技有限公司 | Multifunctional integral sewage processor and its treatment process |
| CN210237404U (en) * | 2019-07-02 | 2020-04-03 | 开州区先辉种植家庭农场 | System for deeply purifying agricultural product deep processing sewage |
| CN111018115A (en) * | 2020-01-09 | 2020-04-17 | 成都市农林科学院 | Biological membrane device and freshwater aquaculture tail water treatment method |
| CN215886696U (en) * | 2021-02-08 | 2022-02-22 | 广州镁雅节能环保有限公司 | Lake and reservoir treatment and aquaculture wastewater treatment device |
| CN114467832A (en) * | 2022-03-10 | 2022-05-13 | 桂林理工大学 | Water self-circulation fresh water ecological breeding system |
-
2022
- 2022-11-02 CN CN202211362410.1A patent/CN115572017A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20150064914A (en) * | 2013-12-04 | 2015-06-12 | 정석균 | Recirculating rearing system |
| CN104591500A (en) * | 2015-01-29 | 2015-05-06 | 北京万邦达环保技术股份有限公司 | Sewage treatment device for coking wastewater |
| CN109205789A (en) * | 2018-11-13 | 2019-01-15 | 中石化炼化工程（集团）股份有限公司 | A kind of biological aerated filter sewage-treatment plant and sewage disposal system |
| CN109626749A (en) * | 2019-01-22 | 2019-04-16 | 新乡市蓝海环境科技有限公司 | Multifunctional integral sewage processor and its treatment process |
| CN210237404U (en) * | 2019-07-02 | 2020-04-03 | 开州区先辉种植家庭农场 | System for deeply purifying agricultural product deep processing sewage |
| CN111018115A (en) * | 2020-01-09 | 2020-04-17 | 成都市农林科学院 | Biological membrane device and freshwater aquaculture tail water treatment method |
| CN215886696U (en) * | 2021-02-08 | 2022-02-22 | 广州镁雅节能环保有限公司 | Lake and reservoir treatment and aquaculture wastewater treatment device |
| CN114467832A (en) * | 2022-03-10 | 2022-05-13 | 桂林理工大学 | Water self-circulation fresh water ecological breeding system |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116535005A (en) * | 2023-06-29 | 2023-08-04 | 成都理工大学 | Intelligent synchronous nitrification and denitrification treatment system and method for domestic sewage |
| CN116535005B (en) * | 2023-06-29 | 2023-09-01 | 成都理工大学 | Intelligent synchronous nitrification and denitrification treatment system and method for domestic sewage |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108432685B (en) | Water environment regulation and control and recirculating aquaculture system for high-load aquaculture | |
| CN103435224A (en) | Waste water treatment technology for livestock breeding | |
| CN112209573B (en) | Breeding tail water treatment system | |
| CN106430847B (en) | Intensive pig raising wastewater treatment equipment | |
| Li et al. | Hazardous substances and their removal in recirculating aquaculture systems: A review | |
| CN103183447A (en) | Treatment method of piggery wastewater | |
| CN111252889A (en) | High-salinity wastewater treatment device and method combining bacteria-algae symbiosis method and membrane biofilm reactor | |
| KR102171918B1 (en) | Recycling and water quality purification treatment system of livestock manure | |
| CN2543951Y (en) | Filling type baffle biological reactor | |
| CN115572017A (en) | Internal circulation method and system for aquaculture tail water | |
| CN214060278U (en) | Mariculture tail water discharging device | |
| CN202658051U (en) | Aquaculture wastewater biochemical treatment system | |
| CN212451088U (en) | Be applied to integrated processing apparatus who breeds waste water treatment | |
| CN208071544U (en) | A kind of railway communication system production wastewater treatment system | |
| CN101200331A (en) | Method for producing reclaimed water by membrane bioreactor-ozone combination technique | |
| CN218778802U (en) | Internal circulation system for tail water of aquaculture | |
| CN216737997U (en) | Bury sewage treatment device with high-efficient backward flow integral type | |
| CN1309096A (en) | Method and device for treating high concentration waste water | |
| CN210642011U (en) | Circulating seawater culture system based on microalgae-strain bioreactor | |
| CN1328192C (en) | A method for comprehensive treatment of high-concentration organic wastewater | |
| CN102531288B (en) | Comprehensive treatment method for livestock dirt and integrated treatment device for livestock dirt wastewater | |
| CN101891298A (en) | In-situ activation modification treatment method for suspended filter material | |
| CN111675450A (en) | Biological aerated filter and ultraviolet disinfection equipment integrated system | |
| CN218811172U (en) | High-efficient sewage denitrification processing apparatus | |
| CN215799063U (en) | Novel bean sprout spray water recycling equipment |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |