CN111875133A - Industrial aquaculture wastewater circulating treatment system - Google Patents
Industrial aquaculture wastewater circulating treatment system Download PDFInfo
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- CN111875133A CN111875133A CN202010785474.7A CN202010785474A CN111875133A CN 111875133 A CN111875133 A CN 111875133A CN 202010785474 A CN202010785474 A CN 202010785474A CN 111875133 A CN111875133 A CN 111875133A
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Images
Classifications
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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
-
- 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
-
- 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
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/725—Treatment of water, waste water, or sewage by oxidation by catalytic oxidation
-
- 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
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
- C02F1/78—Treatment of water, waste water, or sewage by oxidation with ozone
-
- 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
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/22—O2
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/04—Disinfection
Abstract
The invention belongs to the technical field of water treatment, and relates to a circulating treatment system for industrial aquaculture wastewater, which comprises a mechanical filtering unit, an ozone unit, a buffering unit, a photocatalytic unit and a high-efficiency oxygenation unit; the mechanical filtering unit is communicated with the high-efficiency oxygenation unit through a buffer unit and a photocatalytic unit; the high-efficiency oxygenation unit provides oxygen for the photocatalytic unit; the photocatalytic unit is communicated with the buffer unit through the ozone unit; the ozone unit is connected with the mechanical filtering unit. The invention provides a method which has the advantages of simple system, high operability, convenient operation and maintenance, short treatment period, NO secondary pollution and capability of effectively reducing NO of the system3-N of accumulated industrial aquaculture wastewater recycling treatment system.
Description
Technical Field
The invention belongs to the technical field of water treatment, relates to a wastewater circulating treatment system, and particularly relates to an industrial aquaculture wastewater circulating treatment system.
Background
With the rapid development of economy and the improvement of social living standard in China, the demand of aquatic products is increased year by year, the concern and the supporting strength of the development of the aquaculture industry in China are obviously enhanced, the development of the aquaculture industry obtains remarkable results, but the rapid development of the aquaculture industry has damage to the water ecological environment to different degrees.
For aquaculture, it is essentially water-based. The main pollutant in the aquaculture wastewater is NH3-N、NO3-N、NO2N, COD, TP, TSS and pests. If the aquaculture wastewater can not be effectively treated in time, not only the environment of the aquaculture water area is deteriorated, but also explosive diseases of fishes, shrimps, crabs and the like, even large-area death can be caused, and the quality and the yield of aquaculture products are reduced. The industrial aquaculture refers to an industrial and intensive aquaculture mode integrating modern industrial technologies. As a novel breeding mode, the novel breeding mode breaks through the defects of the traditional breeding mode, can reduce the dependence of the breeding process on the surrounding water environment, reduce the sewage discharge in the breeding process, improve the survival rate, reduce the breeding risk, improve the yield and the quality, and realize green breeding. At present, most of solid wastes in the aquaculture wastewater are removed by mechanical filtering equipment and most of NH in the aquaculture wastewater after physical filtration is carried out by the biochemical action of microorganisms in the treatment of domestic industrial aquaculture wastewater3-N、NO3-N、NO2Degrading N, COD and TP pollutants, sterilizing and disinfecting the culture wastewater after biological purification by using ultraviolet rays or ozone, and finally reoxygenating the culture wastewater after sterilization and disinfection by using an oxygen increasing fan and reusing the culture wastewater into each culture pond.
The distribution rule of suspended particles shows that the particle size of most suspended particles is below 100um, especially in a high-density culture system, the proportion (mass ratio) of particles smaller than 30um is higher and accounts for 80-90% of the total suspended substances of TSS in water, and the common physical methods (such as sedimentation and screening) for removing the particles have poor effect. In addition, the biological purification system in the treatment method often has poor treatment effect on pollutants due to poor control, and the following problems are also commonly existed in the process of purifying the pollutants: firstly, a biochemical system needs to activate and domesticate microorganisms, can be put into use formally after having a certain amount of microorganism biomass, and cannot be started for use at any time; ② the concentration of pollutants in the culture wastewater is lower, and nutrient substances (normal BOD: N: P: 100: 5: 1) are unbalanced and lost, so as to cause NH pair of biochemical system3-N、NO3-N、NO2Poor removal of-N contaminantsOr very poor; the effect of the biochemical system on removing pollutants is unstable due to the influence of climate conditions in different areas; fourthly, the biological system needs a certain hydraulic retention time to realize the sufficient biochemical degradation of the pollutants. And the oxygenation system in the treatment method generally increases oxygen for the aquaculture water in a blast aeration mode, and the oxygenation method has low reoxygenation efficiency and high energy consumption.
Aiming at the problems existing in the current industrial aquaculture wastewater treatment, a high-efficiency, stable and controllable aquaculture wastewater treatment system needs to be found by integrating the consideration of high efficiency, environmental protection and economic factors.
Disclosure of Invention
In order to solve the technical problems in the prior art, the invention provides a system which is simple, has high operability, convenient operation and maintenance, short treatment period and NO secondary pollution, and can effectively reduce the NO of the system3-N of accumulated industrial aquaculture wastewater recycling treatment system.
In order to achieve the purpose, the invention adopts the following technical scheme:
the utility model provides an industrial aquaculture wastewater recycling treatment system which characterized in that: the industrial aquaculture wastewater circulating treatment system comprises a mechanical filtering unit, an ozone unit, a buffer unit, a photocatalytic unit and a high-efficiency oxygenation unit; the mechanical filtering unit is communicated with the high-efficiency oxygenation unit through a buffer unit and a photocatalytic unit; the high-efficiency oxygenation unit provides oxygen for the photocatalytic unit; the photocatalytic unit is communicated with the buffer unit through the ozone unit; the ozone unit is connected with the mechanical filtering unit.
Preferably, the mechanical filter unit used in the present invention comprises a drum type microfilter; the rotary drum type micro-filter is provided with a wastewater inlet, a back flushing pipe, an air inlet and an outlet pipe; the ozone unit provides ozone into the inner cavity of the drum-type micro-filter through the air inlet; the waste water inlet is communicated with the water outlet pipe through the inner cavity of the drum-type micro-filter; the back flushing pipe is communicated with the inner cavity of the drum type micro-filter; the opening of the water outlet pipe is connected with the buffer unit.
Preferably, the mechanical filter unit adopted by the invention further comprises a first pipeline pump and a waste water pipeline; the first pipeline pump is communicated with the wastewater inlet through a wastewater pipeline; the aperture of the filter cloth adopted by the rotary drum type micro-filter is 40-60 um; the aperture of the air inlet hole is 6-8 mm.
Preferably, the ozone unit employed in the present invention comprises an ozone generator; the ozone generator is provided with an ozone outlet, a first vent hole, a second vent hole, a first water inlet and a second water inlet; the first vent hole is communicated with the second vent hole through the inner cavity of the ozone generator; the inner cavity of the ozone generator is connected to an air inlet through an ozone outlet; the photocatalysis unit is communicated with the buffer unit sequentially through the first water inlet, the inner cavity of the ozone generator and the second water inlet.
Preferably, the buffering unit adopted by the invention comprises a collecting tank, a first lifting pump and a first pipeline; an opening of the water outlet pipe is connected to the water collecting tank; the second water inlet is connected to the water collecting tank; the first lifting pump is arranged below the liquid level of the water collecting tank; the first lift pump is communicated with the photocatalytic unit through a first pipeline.
Preferably, the buffer unit adopted by the invention comprises a second lifting pump arranged in parallel with the first lifting pump; the structure of the second lift pump is completely the same as that of the first lift pump; the first pipeline is communicated with the first lift pump or the second lift pump.
Preferably, the photocatalytic unit employed in the present invention comprises a photocatalytic reactor; the whole photocatalytic reactor is of a cylindrical structure or a cubic structure; an ultraviolet lamp tube is arranged at the central axis of the photocatalytic reactor; the top and the bottom of the photocatalytic reactor are respectively provided with a water outlet and a third water inlet which are communicated with the inside of the photocatalytic reactor; the inside of the photocatalytic reactor is sequentially provided with an upper grid net, a lower grid net and an aeration disc from top to bottom along the axial direction of the photocatalytic reactor; a photocatalytic reaction area is formed between the upper layer grid mesh and the lower layer grid mesh; the photocatalytic reaction zone is filled with a photocatalyst; the first pipeline is communicated with the water outlet sequentially through the third water inlet, the lower layer grid net, the photocatalytic reaction area and the upper layer grid net; an air inlet is arranged on the aeration disc; the high-efficiency oxygenation unit is communicated with the aeration disc through an air inlet; the water outlet is communicated with the efficient oxygenation unit and the first water inlet respectively.
Preferably, the filling amount of the photocatalyst adopted by the invention in the photocatalytic reaction zone is 30-60% of the total volume of the photocatalytic reaction zone; the photocatalyst comprises a carrier and active components distributed on the surface layer of the carrier; the carrier is made of plastic floating balls or polypropylene fibers; the carrier is spherical or cubic, and the diameter or side length of the carrier is 10-20 mm; the active component is titanium dioxide or a trivalent metal.
Preferably, the power of an ultraviolet lamp tube adopted by the invention is 320-2400W, and the ultraviolet wavelength of the ultraviolet lamp tube is 250-300 nm; the upper layer grid mesh and the lower layer grid mesh have the same structure, and the aperture of each of the upper layer grid mesh and the lower layer grid mesh is 5-15 mm; the vertical height of the photocatalytic reaction zone is 0.6-1.2 m.
Preferably, the high-efficiency oxygenation unit adopted by the invention comprises an oxygen generator, an oxygen dissolving pipeline, a second pipeline pump and a water outlet; the oxygen generator comprises O2A delivery pipe; said O is2The conveying pipe is communicated with the water outlet through a second pipeline, a dissolved oxygen pipeline and a second pipeline pump in sequence; said O is2The conveying pipe is communicated with the aeration disc through an air inlet; the internal structure of the dissolved oxygen pipeline is a spiral structure.
The invention has the beneficial effects that:
the invention provides a factory-like aquaculture wastewater circulating treatment system which comprises a mechanical filtering unit, an ozone unit, a buffer unit, a photocatalytic unit and a high-efficiency oxygenation unit, wherein the ozone unit is arranged on the mechanical filtering unit; the mechanical filtering unit is communicated with the high-efficiency oxygenation unit through a buffer unit and a photocatalytic unit; the high-efficiency oxygenation unit provides oxygen for the photocatalytic unit; the photocatalytic unit is communicated with the buffer unit through the ozone unit; the ozone unit is connected with the mechanical filtering unit. Mechanical filter units forRemoving most of Total Suspended Solids (TSS) in the aquaculture wastewater; the ozone unit is used for oxidizing, sterilizing and oxygenating the aquaculture wastewater, and can also change the property and the size of surface charges of small-particle-size particles in the aquaculture wastewater, so that the charged small particles are gathered to play a certain micro-flocculation role, and the removal of the small-particle-size particles in the aquaculture wastewater by the mechanical filtering unit can be facilitated; the photocatalysis unit can treat ammonia Nitrogen (NH) in the culture wastewater3-N) to reduce nitrous nitrogen (N0) in the system2-N), nitrate nitrogen (N0)3-N) and simultaneously sterilizing and disinfecting the aquaculture wastewater; the high-efficiency oxygenation unit is used for quickly oxygenating the aquaculture wastewater. The system is stable and reliable, can efficiently and quickly remove impurities, purify, sterilize and oxygenate the aquaculture wastewater, recycles the treated aquaculture wastewater, has less wastewater discharge, and reduces the waste of water resources and the pollution to the surrounding water environment. The aquaculture wastewater in the aquaculture facility is pumped into the rotary drum type micro-filter through the first pipeline pump, and is mixed with ozone before entering the rotary drum type micro-filter, and the ozone can not only oxidize and degrade pollutants such as COD and NH in the aquaculture wastewater3N, the water can be sterilized, disinfected and oxygenated, and suspended particles in the culture wastewater can be condensed into large particles, the pollution load of the system is reduced to a certain extent and the removal effect of the particles is improved by the culture wastewater pretreated by ozone, the water inlet of a cooling system of an ozone generator is provided by overflowing of a photocatalytic reactor, clean warm water after cooling circulation is discharged into a water collecting tank without power under the action of liquid level difference, and a water outlet is at a certain distance from the liquid level of the water collecting tank, so that the water drop and oxygen enrichment are realized, and a certain amount of heat is added to circulating water of the system; the waste water after the ozone pretreatment enters a rotary drum type micro-filter, most particles in the waste water are basically removed under the interception effect of filter cloth, the removal effect of the rotary drum type micro-filter on small particles is improved by introducing ozone, a water outlet of the rotary drum type micro-filter has a certain height from the liquid level of a water collecting pool, and the drop water oxygen enrichment can be realized; the physically filtered wastewater is pumped into a photocatalytic reactor through a lift pump to generate a series of reactions, a sterilization and disinfection reaction is generated in a region without a photocatalyst, and a sterilization and disinfection reaction is generated in a region with the photocatalystThe field can generate sterilization and disinfection reactions and can generate hydroxyl free radical (OH) and superoxide free radical (O) with strong oxidizing property2 -) Can directly use NH in the circulating water3Oxidation of-N to N2In addition, the heat generated by the ultraviolet lamp can be absorbed by circulating water, so that the heat supplement of a subsequent system is reduced, in addition, oxygen provided by the aeration disc can accelerate the mass transfer of pollutants in a water body and the mass transfer of a photocatalyst, and can accelerate the formation of free radicals of the photocatalytic system, the reaction time of the whole process is short, and the effect is good; and finally, the nonhazardous circulating water subjected to impurity removal, catalytic oxidation and sterilization forms a green and friendly circulating water body under the action of the oxygenerator and the dissolved oxygen pipeline, and finally the circulating water body meeting the requirement of fish proliferation is pumped into the culture facility through a second pipeline pump. The system is simple, high in operability, convenient to operate and maintain, short in treatment period, free of secondary pollution and capable of effectively reducing NO of the system3And the photocatalyst has good stability and long service life, the activity is renewable, the operation cost is reduced, and the whole system can efficiently realize harmless and stable cyclic treatment of industrial aquaculture wastewater.
Drawings
FIG. 1 is a schematic structural diagram of a factory-like aquaculture wastewater recycling system provided by the invention;
FIG. 2 is a schematic diagram of a mechanical filter unit used in the present invention;
FIG. 3 is a schematic view of the structure of an ozone unit employed in the present invention;
FIG. 4 is a schematic structural diagram of a buffer unit employed in the present invention;
FIG. 5 is a schematic view of the structure of a photocatalytic unit employed in the present invention;
FIG. 6 is a schematic structural diagram of an efficient oxygen increasing unit adopted by the present invention;
wherein:
1-a mechanical filtration unit; 11-a first tubing pump; 12-drum microfilter; 121-backwash tube; 122-an air intake; 123-a water outlet pipe; 13-a waste water line; 2-an ozone unit; 21-an ozone generator; 211-ozone outletA mouth; 212-first vent; 213-a second vent; 214-a first water inlet; 215-a second water inlet; 3-a buffer unit; 31-a water collecting tank; 32-a first lift pump; 33-a second lift pump; 34-a first conduit; 4-a photocatalytic unit; 41-a photocatalytic reactor; 411-ultraviolet lamp tube; 412-a photocatalyst; 412 a-vector; 412 b-active component; 413-a grid net; 414-a photocatalytic reaction zone; 415-a third water inlet; 416-a water outlet; 417 — gas inlet; 418-aeration disc; 5-efficient oxygenation unit; 51-oxygen generator; 511-O2A delivery pipe; 52-dissolved oxygen pipeline; 53-a second conduit; 54-second channel pump.
Detailed Description
The principles and features of this invention are described below in conjunction with the following drawings, which are set forth by way of illustration only and are not intended to limit the scope of the invention.
As shown in FIG. 1, the invention provides a high-efficiency industrial aquaculture wastewater circulating treatment system, which comprises a mechanical filtering unit 1, an ozone unit 2, a buffer unit 3, a photocatalytic unit 4 and a high-efficiency oxygenation unit 5; the mechanical filtering unit 1 is communicated with the high-efficiency oxygenation unit 5 through a buffer unit 3 and a photocatalytic unit 4; the high-efficiency oxygenation unit 5 provides oxygen for the photocatalytic unit 4; the photocatalytic unit 4 is communicated with the buffer unit 3 through the ozone unit 2; the ozone unit 2 is connected to the mechanical filter unit 1. The mechanical filtering unit 1 is used for providing power for system wastewater transmission and removing most TSS; the ozone unit 2 can carry out oxidative degradation, sterilization, disinfection and micro flocculation on the culture wastewater; the buffer unit 3 is used for supplying backwashing water, supplying power for transferring waste water at the middle end of the system and uniformly mixing the pretreated waste water; the photocatalytic unit 4 can carry out efficient photocatalytic degradation, sterilization, disinfection and oxygenation on the circulating water body; the high-efficiency oxygenation unit 5 can quickly and effectively improve the dissolved oxygen in the circulating water body and convey the circulating water body reaching the standard to the culture facility.
As shown in fig. 1-2, a mechanical filter unit 1 adopted by the invention comprises a first pipeline pump 11, a rotary drum type microfilter 12 and a waste water pipeline 13, wherein the first pipeline pump 11 is connected with a water inlet of the rotary drum type microfilter 12 through the waste water pipeline 13; the drum type microfilter 12 is horizontally positioned on the ground, and the relative height is +/-0 m; the aperture of the filter cloth of the rotary drum type micro-filter 12 is 40-60 um; an ozone inlet 122 is arranged at the outlet of the back flushing pipe 121 of the rotary drum type micro-filter 12, and the aperture of the inlet 122 is 6-8 mm; the tail end of a water outlet pipe 123 of the rotary drum type micro-filter 12 is positioned below the ground; waste water is pumped into a waste water pipeline 13 through a first pipeline pump 11, fully contacts and mixes with ozone entering an air inlet 122 before entering a rotary drum type micro-filter 12, enters the rotary drum type micro-filter to be subjected to oxidative degradation, sterilization and disinfection and micro-flocculation reaction, and is filtered and intercepted by filter cloth with the aperture of 40-60 um, and the waste water with low TSS concentration is discharged into the next unit through a water outlet pipe 123.
As shown in fig. 1 and 3, the ozone unit 2 adopted by the present invention comprises an ozone generator 21, an ozone outlet 211, a first air vent 212, a second air vent 213, a first water inlet 214, and a second water inlet 215, wherein the ozone generator 21 is horizontally disposed on the ground with a relative height of ± 0 m; the ozone outlet 211 is connected with the air inlet 122; the first water inlet 214 and the second water inlet 215 are connected with different subsequent units of the system; after the ozone generator 21 is started, air in the external environment enters the ozone generator 21 through the first vent 212 and is discharged to the external environment through the second vent 213, circulating cooling water of the system enters from the first water inlet 214 and is discharged from the second water inlet 215, and finally O is generated3Enters the air inlet hole 122 through the ozone outlet hole 211.
As shown in fig. 1 and 4, the buffer unit 3 adopted in the present invention includes a water collecting tank 31, a first lift pump 32, a second lift pump 33 and a first pipe 34, wherein the water collecting tank 31 is horizontally located under the ground, has a relative height of about-1.2 m, and is of a square concrete structure; the first lift pump 32 and the second lift pump 33 are sequentially arranged at the bottom of the water collecting tank 31 in parallel and horizontally, and are used and prepared; a pipe orifice at the tail end of the water outlet pipe 123 and a pipe orifice at the tail end of the second water inlet 215 are respectively arranged 8-15 cm above the liquid level of the water collecting tank 31; the first conduit 34 is connected to a subsequent adjacent unit of the system; the treated water in the sump 31 is pumped by the first lift pump 32 or the second lift pump 33 into the first conduit 34 and finally flows into the next treatment unit of the system.
As shown in fig. 1 and 5, the photocatalytic unit 4 adopted in the present invention comprises a photocatalytic reactor 41, an ultraviolet lamp 411, a photocatalyst 412, a grid net 413, a photocatalytic reaction zone 414, a third water inlet 415, a water outlet 416, a gas inlet 417 and an aeration disc 418, wherein the photocatalytic reactor 41 is a cylinder or a cube, is horizontally located on the ground, and has a relative height of ± 0 m; the ultraviolet lamp tube 411 is located at the central axis position of the photocatalytic reactor 41; the photocatalyst 412 is intercepted in the photocatalytic reaction zone 414 by the upper and lower grid nets 413 at the middle position of the photocatalytic reactor 41; the third water inlet 415 is positioned at one side of the bottom of the photocatalytic reactor 41, and the water outlet 416 is positioned at the other side of the top of the photocatalytic reactor 41; the aeration plate 418 is located at the bottom end of the inside of the photocatalytic reactor 41, and the air inlet holes 417 are located at the bottom side of the photocatalytic reactor 41.
The power of the ultraviolet lamp tube 411 is 320-2400W, and the ultraviolet wavelength of the ultraviolet lamp tube 411 is 250-300 nm; the photocatalyst 412 comprises a carrier 412a and an active component 412b, the filling amount of the photocatalyst is 30% -60%, the carrier 412a is a plastic floating ball or a polypropylene PP fiber material and the like, the carrier 412a is spherical or cubic, the diameter or side length is 10-20 mm, and the active component 412b is titanium dioxide TiO2Or M3+M is a metal element, e.g. Fe, Ag, Y, etc./TiO2Or carbon nitride g-C3N4The active component 412b is uniformly distributed on the surface layer of the carrier 412 a; the meshes of the grid net 413 are square, and the aperture is 5-15 mm; the vertical height of the photocatalytic reaction zone 414 is 0.6 to 1.2 m.
The third water inlet 415 of the photocatalytic reactor 41 is connected with the first pipe 34; the water outlet 416 is respectively connected with the first water inlet 214 and the next unit of the system; the air inlet 417 is connected to the aeration plate 418 via an air pipe, and the air inlet 417 is connected to the next unit of the system.
The treated wastewater enters the photocatalytic reactor 41 through the third water inlet 415, and the aeration disc 418 provides O2In the photocatalytic reaction zone 414, the ultraviolet lamp tube 411 provides energy to excite the photocatalyst 412 to generate strong oxidizing free radicals to oxidize and degrade pollutants in the wastewater, and under the high-energy ultraviolet wavelength, bacteria and viruses are inactivated, most of the treated water finally flows into the next unit through the water outlet 416, and a small part of the treated water flows into the first unitIn the water inlet 214.
As shown in fig. 1 and 6, the high-efficiency oxygen increasing unit 5 adopted by the invention comprises an oxygen generator 51 and an O2The delivery pipe 511, the dissolved oxygen pipeline 52, the second pipeline 53 and the second pipeline pump 54, the oxygen generator 51 is horizontally arranged on the ground, and the relative height is +/-0 m; o of the oxygen generator 512The delivery pipe 511 is respectively connected with the second pipeline 53 and the air inlet 417, the water outlet 416 is connected with the second pipeline 53, the second pipeline 53 is connected with the dissolved oxygen pipeline 52, and the dissolved oxygen pipeline 52 is further connected with the second pipeline pump 54; the internal structure of the dissolved oxygen pipeline 52 is a spiral structure; the wastewater after the photocatalysis treatment enters a second pipeline 53, and O generated by an oxygen generator2Into the second conduit 53 and the inlet 417, and the O2 entering the inlet 417 supplies oxygen to the photocatalytic reactor 41 and the O entering the second conduit 532The dissolved oxygen and the circulating water are fully dissolved and mixed in the dissolved oxygen pipeline 52 and are pumped into the culture facility by a second pipeline pump 54, so as to circulate the treatment back and forth.
Although embodiments of the present invention have been shown and described, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that changes, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art without departing from the scope of the present invention, but are to be protected by the following patent laws.
Claims (10)
1. The utility model provides an industrial aquaculture wastewater recycling treatment system which characterized in that: the industrial aquaculture wastewater circulating treatment system comprises a mechanical filtering unit (1), an ozone unit (2), a buffer unit (3), a photocatalytic unit (4) and an efficient oxygenation unit (5); the mechanical filtering unit (1) is communicated with the high-efficiency oxygenation unit (5) through a buffer unit (3) and a photocatalytic unit (4); the high-efficiency oxygen increasing unit (5) provides oxygen for the photocatalytic unit (4); the photocatalytic unit (4) is communicated with the buffer unit (3) through the ozone unit (2); the ozone unit (2) is connected to the mechanical filtering unit (1).
2. The industrial aquaculture wastewater recycling treatment system of claim 1, wherein: the mechanical filter unit (1) comprises a rotary drum micro-filter (12); the rotary drum type micro-filter (12) is provided with a wastewater inlet, a back flushing pipe (121), an air inlet (122) and a water outlet pipe (123); the ozone unit (2) provides ozone into the inner cavity of the rotary drum type micro-filter (12) through an air inlet hole (122); the waste water inlet is communicated with the water outlet pipe (123) through the inner cavity of the rotary drum type micro-filter (12); the back flushing pipe (121) is communicated with the inner cavity of the rotary drum type micro-filter (12); the opening of the water outlet pipe (123) is connected with the buffer unit (3).
3. The industrial aquaculture wastewater recycling treatment system according to claim 2, characterized in that: the mechanical filter unit (1) further comprises a first pipeline pump (11) and a waste water pipeline (13); the first pipeline pump (11) is communicated with a wastewater inlet through a wastewater pipeline (13); the aperture of the filter cloth adopted by the rotary drum type micro-filter (12) is 40-60 um; the aperture of the air inlet hole (122) is 6-8 mm.
4. The industrial aquaculture wastewater recycling treatment system according to claim 3, characterized in that: the ozone unit (2) comprises an ozone generator (21); the ozone generator (21) is provided with an ozone outlet (211), a first ventilation opening (212), a second ventilation opening (213), a first water inlet (214) and a second water inlet (215); the first vent (212) is communicated with the second vent (213) through the inner cavity of the ozone generator (21); the inner cavity of the ozone generator (21) is connected to the air inlet hole (122) through the ozone outlet hole (211); the photocatalysis unit (4) is communicated with the buffer unit (3) sequentially through the first water inlet (214), the inner cavity of the ozone generator (21) and the second water inlet (215).
5. The industrial aquaculture wastewater recycling treatment system according to claim 4, characterized in that: the buffer unit (3) comprises a water collecting tank (31), a first lifting pump (32) and a first pipeline (34); an opening of the water outlet pipe (123) is connected into the water collecting tank (31); the second water inlet (215) is connected into a water collecting tank (31); the first lifting pump (32) is arranged below the liquid level of the water collecting tank (31); the first lift pump (32) is communicated with the photocatalytic unit (4) through a first pipeline (34).
6. The industrial aquaculture wastewater recycling treatment system according to claim 5, characterized in that: the damping unit (3) further comprises a second lift pump (33) arranged in parallel with the first lift pump (32); the structure of the second lift pump (33) is completely the same as that of the first lift pump (32); the first conduit (34) is in communication with either the first lift pump (32) or the second lift pump (33).
7. The industrial aquaculture wastewater recycling treatment system of claim 6, wherein: the photocatalytic unit (4) comprises a photocatalytic reactor (41); the photocatalytic reactor (41) is of a cylindrical structure or a cubic structure as a whole; an ultraviolet lamp tube (411) is arranged at the central axis of the photocatalytic reactor (41); the top and the bottom of the photocatalytic reactor (41) are respectively provided with a water outlet (416) and a third water inlet (415) which are communicated with the inside of the photocatalytic reactor (41); the inside of the photocatalytic reactor (41) is sequentially provided with an upper grid net, a lower grid net and an aeration disc (418) from top to bottom along the axial direction of the photocatalytic reactor (41); a photocatalytic reaction area (414) is formed between the upper layer grid mesh and the lower layer grid mesh; the photocatalytic reaction zone (414) is filled with a photocatalyst (412); the first pipeline (34) is communicated with the water outlet (416) sequentially through a third water inlet (415), the lower grid net, the photocatalytic reaction area (414) and the upper grid net; an air inlet (417) is arranged on the aeration disc (418); the high-efficiency oxygenation unit (5) is communicated with an aeration disc (418) through an air inlet (417); the water outlet (416) is communicated with the high-efficiency oxygenation unit (5) and the first water inlet (214) respectively.
8. The industrial aquaculture wastewater recycling treatment system of claim 7, wherein: the filling amount of the photocatalyst (412) in the photocatalytic reaction zone (414) is 30-60% of the total volume of the photocatalytic reaction zone (414); the photocatalyst (412) comprises a carrier (412 a) and an active component (412 b) distributed on the surface layer of the carrier (412 a); the material of the carrier (412 a) is plastic floating balls or polypropylene fibers; the carrier (412 a) is spherical or cubic, and the diameter or side length of the carrier (412 a) is 10-20 mm; the active component (412 b) is titanium dioxide or a trivalent metal.
9. The industrial aquaculture wastewater recycling treatment system of claim 8, wherein: the power of the ultraviolet lamp tube (411) is 320-2400W, and the ultraviolet wavelength of the ultraviolet lamp tube (411) is 250-300 nm; the upper layer grid mesh and the lower layer grid mesh have the same structure, and the aperture of each of the upper layer grid mesh and the lower layer grid mesh is 5-15 mm; the vertical height of the photocatalytic reaction zone (414) is 0.6-1.2 m.
10. The industrial aquaculture wastewater recycling treatment system of claim 9, wherein: the high-efficiency oxygenation unit (5) comprises an oxygen generator (51), an oxygen dissolving pipeline (52), a second pipeline (53), a second pipeline pump (54) and a water outlet; the oxygen generator (51) comprises O2A delivery pipe (511); said O is2The delivery pipe (511) is communicated with the water outlet through a second pipeline (53), a dissolved oxygen pipeline (52) and a second pipeline pump (54) in sequence; said O is2The delivery pipe (511) is communicated with the aeration disc (418) through an air inlet (417); the internal structure of the dissolved oxygen pipeline (52) is a spiral structure.
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