CN219620971U - Device for purifying tail water of aquaculture - Google Patents
Device for purifying tail water of aquaculture Download PDFInfo
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- CN219620971U CN219620971U CN202223609235.XU CN202223609235U CN219620971U CN 219620971 U CN219620971 U CN 219620971U CN 202223609235 U CN202223609235 U CN 202223609235U CN 219620971 U CN219620971 U CN 219620971U
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 194
- 238000009360 aquaculture Methods 0.000 title claims abstract description 96
- 244000144974 aquaculture Species 0.000 title claims abstract description 96
- 238000011049 filling Methods 0.000 claims abstract description 33
- 239000000945 filler Substances 0.000 claims abstract description 29
- 229920002635 polyurethane Polymers 0.000 claims abstract description 13
- 239000004814 polyurethane Substances 0.000 claims abstract description 13
- 238000000746 purification Methods 0.000 claims description 45
- 238000005406 washing Methods 0.000 claims description 6
- 238000005192 partition Methods 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 claims description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 abstract description 48
- 229910052757 nitrogen Inorganic materials 0.000 abstract description 23
- 239000007787 solid Substances 0.000 abstract description 9
- 239000000725 suspension Substances 0.000 abstract description 6
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 abstract 1
- 229910052698 phosphorus Inorganic materials 0.000 abstract 1
- 239000011574 phosphorus Substances 0.000 abstract 1
- 239000010410 layer Substances 0.000 description 31
- 230000000694 effects Effects 0.000 description 30
- 238000011010 flushing procedure Methods 0.000 description 22
- 238000000034 method Methods 0.000 description 14
- 239000013049 sediment Substances 0.000 description 11
- 239000001301 oxygen Substances 0.000 description 9
- 229910052760 oxygen Inorganic materials 0.000 description 9
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 8
- 239000003344 environmental pollutant Substances 0.000 description 8
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 8
- 231100000719 pollutant Toxicity 0.000 description 8
- 239000007921 spray Substances 0.000 description 8
- 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 7
- 230000008569 process Effects 0.000 description 7
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- 230000009286 beneficial effect Effects 0.000 description 5
- 239000007789 gas Substances 0.000 description 5
- 239000002245 particle Substances 0.000 description 5
- CKUAXEQHGKSLHN-UHFFFAOYSA-N [C].[N] Chemical compound [C].[N] CKUAXEQHGKSLHN-UHFFFAOYSA-N 0.000 description 4
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- 238000012360 testing method Methods 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 3
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- 239000012535 impurity Substances 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 239000002893 slag Substances 0.000 description 3
- 239000010802 sludge Substances 0.000 description 3
- -1 suspended matters Substances 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 238000005273 aeration Methods 0.000 description 2
- 238000002306 biochemical method Methods 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 229910001873 dinitrogen Inorganic materials 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- AHEWZZJEDQVLOP-UHFFFAOYSA-N monobromobimane Chemical compound BrCC1=C(C)C(=O)N2N1C(C)=C(C)C2=O AHEWZZJEDQVLOP-UHFFFAOYSA-N 0.000 description 2
- 102000004169 proteins and genes Human genes 0.000 description 2
- 108090000623 proteins and genes Proteins 0.000 description 2
- 238000010926 purge Methods 0.000 description 2
- 239000002344 surface layer Substances 0.000 description 2
- OLBVUFHMDRJKTK-UHFFFAOYSA-N [N].[O] Chemical class [N].[O] OLBVUFHMDRJKTK-UHFFFAOYSA-N 0.000 description 1
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Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W10/00—Technologies for wastewater treatment
- Y02W10/10—Biological treatment of water, waste water, or sewage
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- Farming Of Fish And Shellfish (AREA)
Abstract
The utility model discloses a device for purifying aquaculture tail water, which belongs to the technical field of aquaculture tail water treatment and comprises a box body, wherein a free-flowing biochemical ball filling layer is arranged in the box body, the free-flowing biochemical ball filling layer is filled with free-flowing biochemical balls, the free-flowing biochemical balls are hollow spheres, and polyurethane suspension filler is filled in the free-flowing biochemical balls. The device for purifying the aquaculture tail water can effectively reduce the nitrogen content and the phosphorus content of the aquaculture tail water and reduce the COD and suspended solids SS of the tail water.
Description
Technical Field
The utility model belongs to the technical field of aquaculture tail water treatment, and particularly relates to a device for purifying aquaculture tail water.
Background
The traditional aquaculture mode is rough, a large amount of tail water can be generated in the aquaculture process, and the untreated tail water can bring about great environmental pressure by direct discharge. In recent years, the treatment of the tail water of the aquaculture is gradually raised, and corresponding various tail water purification technologies are also widely applied. The aim of tail water purification is to recycle and reuse so as to reduce the discharge amount of tail water and maintain good steady state of a aquaculture water environment, common technologies of tail water purification include a biological fluidized bed (MBBR), a sand filtration tank, a protein separator, a rotary drum micro-filter, a trickling filter, a tower filter and the like, and the technologies can be used independently or in combination, wherein the filtration tank, the protein separator and the rotary drum micro-filter are simple physical filtration, and the defect is that the pollutant removal index is single, mainly only aims at removing suspended matters (SS) in water body, and the efficiency of removing other pollutant indexes is lower; the trickling filter and the tower filter are biological filter processes, and have the defects that pretreatment is generally required to remove suspended matters, but the filters are easy to be blocked due to the enrichment of pollutants on the surface layer and the growth of biological films; however, the biological fluidized bed (MBBR) process has the disadvantages that pretreatment is generally required to remove suspended matters, and large air quantity aeration is required, so that a large amount of power consumption is caused. On the other hand, when tail water generated in the cultivation process is treated, besides suspended matters in inflow water, the carbon source content in inflow water is low, the nitrogen content is high, so that the carbon-nitrogen ratio is low, the dissolved oxygen content is high, and the total nitrogen in the tail water is difficult to reduce to the emission standard by the technology. Specifically, the aquaculture tail water has higher dissolved oxygen concentration, has an inhibition effect on denitrification reaction, and is unfavorable for denitrification; meanwhile, the carbon source of the culture tail water is less, the denitrification reaction is not supported to be carried out smoothly, the denitrification is not facilitated, the carbon-nitrogen ratio of the domestic sewage is equal to or more than 4 in the aspect of carbon-nitrogen ratio analysis, and the heterotrophic denitrification is carried out; the ratio of the carbon nitrogen ratio of the culture tail water is less than 4, which is unfavorable for the heterotrophic denitrification.
Disclosure of Invention
In order to overcome the defects in the prior art, the utility model aims to provide the device for purifying the aquaculture tail water, which can efficiently remove pollutants such as suspended matters, colloid and the like in the aquaculture tail water, convert nitrate nitrogen in the aquaculture tail water into nitrogen gas or nitrogen oxide compound gas through denitrification, release the nitrogen gas from the aquaculture tail water removing device, reduce the nitrogen content in the aquaculture tail water, efficiently utilize the space in the box body and improve the purification rate of the aquaculture tail water.
In order to achieve the above purpose, the present utility model adopts the following technical scheme:
the utility model provides an aquaculture tail water purification's device, includes the box, be equipped with the biochemical ball filling layer that flows in the box, the biochemical ball filling layer that flows fills the biochemical ball that flows, the biochemical ball that flows is the fretwork spheroid, the polyurethane suspension filler that fills in the biochemical ball that flows.
Preferably, the water inlet pipe is further included, one end of the water inlet pipe leaks out of the box body, the other end of the water inlet pipe extends to the bottom of the box body, and one end of the water inlet pipe leaks out of the box body to form a water inlet.
Preferably, a partition plate is arranged in the box body, the box body is divided into at least two flow-off purification areas, water passing pipes are arranged between adjacent flow-off purification areas and are communicated with each other, each flow-off purification area is provided with a flow-off biochemical ball filling layer, and the water passing pipes are communicated from the upper part of the flow-off biochemical ball filling layer of the previous flow-off purification area to the lower part of the flow-off biochemical ball filling layer of the latter flow-off purification area.
Preferably, five baffles are arranged in the box body to divide the box body into 6 flow-off purification areas.
Preferably, the free-flowing biochemical ball is hollow spherical, and polyurethane suspension filler is filled in the free-flowing biochemical ball.
Preferably, a drain outlet is arranged at the bottom of the flow-away purification zone.
Preferably, the drain is located diagonally to the bottom of the off-flow purification zone.
Preferably, the device of the aquaculture tail water purification method further comprises a back flush system, the back flush system comprises a back flush air inlet pipe and a back flush air jet pipe, the back flush air jet pipe is positioned below the lower bracket and communicated with the back flush air inlet pipe, the back flush air inlet pipe is connected with a fan or an air pump, and gas sprayed by the back flush air jet pipe is used for carrying out air washing or air-water combined washing on the off-biochemical ball filling layer.
Preferably, the upper bracket and the lower bracket are hollow hard material net racks.
Preferably, a plurality of said means for purifying aquaculture tail water are connected in series or in parallel.
Compared with the prior art, the utility model has the following beneficial effects:
1. according to the aquaculture tail water purifying device, the free-flowing biochemical balls are filled between the upper bracket and the lower bracket to form the free-flowing biochemical ball filling layer, so that the free-flowing biochemical ball filling layer is stable, the free-flowing biochemical balls are not impacted by water flow to float, and pollutants such as suspended matters and colloid are more uniformly gathered on the surfaces of polyurethane suspension fillers in the free-flowing biochemical balls contacted in the whole water flowing process by utilizing the free-flowing effect, so that the pollutants such as suspended matters and colloid in aquaculture tail water are effectively removed, and the problems of easy blockage of a system caused by the enrichment of the pollutants on the surface layer and the growth of a biological film are avoided; meanwhile, the flow-off biochemical balls are hollow spheres, polyurethane suspended fillers are filled in the flow-off biochemical balls, denitrifying bacteria are attached to the polyurethane suspended fillers, nitrate nitrogen in the aquaculture tail water can be converted into nitrogen or nitrogen oxide through denitrification and is released from the aquaculture tail water removing device, so that the nitrogen content in the aquaculture tail water can be reduced, and on the other hand, sediment in the aquaculture tail water can be removed firstly when the aquaculture tail water is drained to the bottom of the box body; the tail water is drained to the bottom by utilizing water flow impact and collection so as to be beneficial to sediment discharge; meanwhile, the compacted filler such as solid matters, suspended matters and the like is stopped at the lower layer, so that flushing is clean during back flushing, the filler is discharged through a slag discharge port, the filler layer is prevented from being blocked, and the water flux of the system is recovered. Further, the inside of the box body is separated by an inner partition plate and is divided into at least two flow-off purification areas, the adjacent flow-off purification areas are communicated through a water pipe, and each flow-off purification area is provided with a flow-off biochemical ball filling layer, so that pollutants such as suspended matters, colloid and the like in the aquaculture tail water are removed for multiple times, and finally discharged from the inside and the outside of the box body; the method has the advantages of less production of the surplus sludge of the recycled water, no aeration and low energy consumption.
2. According to the aquaculture tail water purifying device provided by the utility model, the free-flowing biochemical balls are filled between the upper bracket and the lower bracket to form the free-flowing biochemical ball filling layer, so that the free-flowing biochemical ball filling layer is stable, the free-flowing biochemical balls are not impacted by water flow to float, and on the other hand, when the aquaculture tail water is drained to the bottom of the box body, sediment in the aquaculture tail water can be removed first; when the tail water is drained to the bottom, the sediment is discharged by utilizing the impact and collection of water flow; meanwhile, the compacted filler such as solid matters, suspended matters and the like is stopped at the lower layer, so that flushing is clean during back flushing, the filler is discharged through a slag discharge port, the filler layer is prevented from being blocked, and the water flux of the system is recovered. Further, the inside of the box body is separated by the inner partition plate and is divided into at least two flow-off purification areas, the adjacent flow-off purification areas are communicated through the water pipe, each flow-off purification area is provided with a flow-off biochemical ball filling layer, the space inside the box body can be efficiently utilized, and the purification rate of the aquaculture tail water is improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the embodiments or the description of the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present utility model, and that other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic structural view of an apparatus for purifying tail water of aquaculture according to a preferred embodiment 2 of the present utility model.
FIG. 2 is a front view of the apparatus for purifying aquaculture tail water according to the preferred embodiment 2 of the present utility model.
FIG. 3 is the effect data of total nitrogen purification of aquaculture tail water according to preferred embodiment 4 of the present utility model.
FIG. 4 is the effect data of the amount of nitrate nitrogen purified from aquaculture tail water according to preferred embodiment 4 of the present utility model.
FIG. 5 is data of the effect of the suspension on the purification of aquaculture tail water according to preferred embodiment 4 of the present utility model.
FIG. 6 is data on the effect of total nitrogen on aquaculture tail water purification in a comparative example of the present utility model.
FIG. 7 is data on the effect of nitrate nitrogen content on aquaculture tail water purification according to a comparative example of the present utility model.
In the figure: 1. a case 1; 2. a water inlet; 3. a water outlet; 4. an upper bracket; 5. a lower bracket; 6. a first effluent clean-up zone; 7. a second flow-off purification zone; 8. a third effluent clean-up zone; 9. fourth flow off the purge zone; 10. fifth flow off the purge zone; 11. a sixth flow off the purification zone; 61. a water inlet pipe; 62. a first drain outlet; 63. a first blow-down valve; 64. a first backwash air inlet pipe; 65. a first backwash air lance; 71. a first water pipe; 72. a second drain outlet; 73. a second blow-down valve; 74. a second backwash air inlet pipe; 75. a second backwash air lance; 81. a second water pipe; 82. a third drain outlet; 83. a third blow-down valve; 84. a third flushing air inlet pipe; 85. a third reaction flushing gas lance; 91. a third water passing pipe; 92. a fourth sewage outlet; 93. a fourth blow-down valve; 94. a fourth backwash air inlet pipe; 95. a fourth backwash air ejector; 101. a fourth water pipe; 102. a fifth sewage outlet; 103. a fifth blow-down valve; 104. a fifth backwash air inlet pipe; 105. a fifth backwash air ejector; 111. a fifth water passing pipe; 112. a sixth drain outlet; 113. a sixth blow-down valve; 114. a sixth backwash air inlet pipe; 115. a sixth backwash air ejector; 12. flow off the biochemical ball; 13. and flowing away from the biochemical ball filling layer.
Detailed Description
In order to make the technical problems, technical schemes and beneficial effects to be solved more clear and obvious, the utility model is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.
Example 1
Referring to fig. 1, the present embodiment provides a method for purifying aquaculture tail water, which is applied to an aquaculture tail water removing device, the aquaculture tail water purifying device includes a box 1, a water inlet pipe 61, a water outlet pipe, and the interior of the box 1 is separated by a bracket, the bracket includes an upper bracket 4 and a lower bracket 5, the upper bracket 4 is located above the lower bracket 5, a flow-off biochemical ball 12 is filled between the upper bracket 4 and the lower bracket 5 to form a flow-off biochemical ball filling layer 13, the upper bracket 4 and the lower bracket 5 stabilize the flow-off biochemical ball filling layer 13, and the flow-off biochemical ball 12 is not impacted by water flow and floats;
the method comprises the following steps:
s1, enabling aquaculture tail water to enter the box body 1 through a water inlet 2 of a water inlet pipe 61, and draining the aquaculture tail water to the bottom of the box body 1 through the water inlet pipe 61 for removing sediment in the aquaculture tail water; meanwhile, the compacted filler such as solid matters, suspended matters and the like is stopped at the lower layer, so that flushing is clean during back flushing, the filler is discharged through a slag discharge port, the filler layer is prevented from being blocked, and the water flux of the system is recovered.
Specifically, since the upper bracket 4 and the lower bracket 5 are hollow hard material net frames, the water inlet pipe 61 can pass through the upper bracket 4 and the lower bracket 5 and extend to the bottom of the box body 1.
Specifically, as shown in fig. 2, a first drain outlet 62 is disposed at the bottom of the tank 1, a first drain valve 63 is disposed at the outer side of the tank 1 corresponding to the first drain outlet 62, and the first drain outlet 62 is disposed at a position opposite to the water inlet pipe 61, so as to make full use of impact and collection effects of inflow water flow on the impurities at the bottom, and facilitate discharge of sediments.
S2, the aquatic product culture tail water flowing out of the bottom of the box body 1 flows from bottom to top through the flow-off biochemical ball filling layer 13, the flow-off biochemical ball 12 is not impacted by water flow to float, a stable flow-off purifying effect is formed, suspended matters and colloid in the aquaculture tail water can be removed, the flow-off biochemical ball 12 is hollow spherical, polyurethane suspended filler is filled in the interior, denitrifying bacteria are attached to the polyurethane suspended filler, nitrate nitrogen in the aquaculture tail water can be converted into nitrogen or nitrogen oxide through assimilation and denitrification, and the nitrogen can be released from the aquaculture tail water removing device, so that the nitrogen content in the aquaculture tail water can be reduced.
S3, discharging the aquaculture tail water purified by the off-flow biochemical ball filling layer 13 through a water outlet 3 of a water outlet pipe to obtain purified aquaculture tail water.
Example 2
In this embodiment, referring to fig. 1, the interior of the box 1 is separated by an inner partition plate and divided into six flow-off purifying areas, namely, a first flow-off purifying area 6, a second flow-off purifying area 7, a third flow-off purifying area 8, a fourth flow-off purifying area 9, a fifth flow-off purifying area 10 and a sixth flow-off purifying area 11, wherein each flow-off purifying area is provided with an upper bracket 4 and a lower bracket 5, flow-off biochemical balls 12 are filled between the upper bracket 5 and the lower bracket 5, each flow-off purifying area is communicated through a water pipe, the water pipe is a first water pipe 71, a second water pipe 81, a third water pipe 91, a fourth water pipe 101 and a fifth water pipe 111, and each flow-off purifying area is provided with a flow-off biochemical ball filling layer 13.
In this embodiment, the method for purifying aquaculture tail water provided in embodiment 1 may further include the following steps:
s4, the aquaculture tail water purified by the flow-off biochemical ball filling layer 13 in the embodiment 1 can enter the second flow-off purifying zone 7 through the first water passing pipe 71, is guided to the bottom of the second flow-off purifying zone 7 through the first water passing pipe 71, and is used for further removing residual sediment in the aquaculture tail water treated by the first flow-off purifying zone 6;
specifically, since the upper bracket 4 and the lower bracket 5 are hollow hard material net frames, the first water passing pipe 71 can pass through the upper bracket 4 and the lower bracket 5 and extend to the bottom of the box 1.
Specifically, the bottom of the second flow separation purification zone 7 is provided with a second drain outlet 72, a second drain valve 73 is arranged at the outer side of the box body 1 corresponding to the second drain outlet 72, and the second drain outlet 72 is arranged at a position opposite to the first water passing pipe 71 so as to fully utilize the impact and collection effect of the inflow water flow on the sediment impurities and facilitate the discharge of the sediment.
S5, flowing the aquatic product culture tail water flowing out of the bottom of the second free-flowing purification area 7 from bottom to top through the free-flowing biochemical ball filling layer 13, wherein the free-flowing biochemical ball 12 is free from water flow impact and floats to form a stable free-flowing purification effect, suspended matters and colloid in the aquaculture tail water can be further removed, the free-flowing biochemical ball 12 is hollow spherical, polyurethane suspended filler is filled in the free-flowing biochemical ball, the filler can form clamping positions in the biochemical ball to be fixed by the filler, the porous filler in the biochemical ball can also be at least one of PP, PE or polyurethane, denitrifying bacteria are attached to the polyurethane suspended filler, and nitrogen in the aquaculture tail water can be converted into nitrogen or nitrogen-oxygen compounds through the denitrification effect and assimilated and released from the aquaculture tail water removing device, so that the nitrogen content in the aquaculture tail water can be reduced;
s6, the aquaculture tail water purified by the flow-off biochemical ball filling layer 13 in the second flow-off purifying area 7 enters the third flow-off purifying area 8 through the second water pipe 81, is guided to the bottom of the third flow-off purifying area 8 through the second water pipe 81, is used for further removing the residual sediment in the aquaculture tail water treated by the second flow-off purifying area 7, and according to the logic, the aquaculture tail water sequentially flows from the third flow-off purifying area 8 to the sixth flow-off purifying area 11 and finally is discharged outside through the water outlet 3, the third, fourth, fifth and sixth flow-off purification areas 8, 9, 10 and 11 may be respectively provided with a third drain 82, a fourth drain 92, a fifth drain 102 and a sixth drain 112 at the bottom thereof, and the outside of the tank 1 is respectively and correspondingly provided with a third drain valve 83, a fourth drain valve 93, a fifth drain valve 103 and a sixth drain valve 113, and the third drain 82, the fourth drain 92, the fifth drain 102 and the sixth drain 112 are respectively disposed at diagonal positions of the second water pipe 81, the third water pipe 91, the fourth water pipe 101 and the fifth water pipe 111, so as to make full use of impact and collection effects of water inflow on impurities at the bottom, and facilitate discharge of sediments.
In addition, the aquaculture tail water purifying device further comprises a back flush system, wherein the back flush system is arranged in each of a first flow purification area 6, a second flow purification area 7, a third flow purification area 8, a fourth flow purification area 9, a fifth flow purification area 10 and a sixth flow purification area 11, the back flush system, the second back flush system, the third back flush system, the fourth back flush system, the fifth back flush system and the sixth back flush system are sequentially arranged, the back flush system comprises a back flush air inlet pipe and a back flush air jet pipe, the back flush air jet pipe is positioned below the lower bracket 5, the back flush air jet pipe is communicated with the back flush air inlet pipe, the back flush air inlet pipe is connected with a fan or an air pump, the air is supplied by the external fan or the air pump, the back flush air inlet pipe respectively enters each flow purification area, and the back flush air jet pipe sprays gas or water for carrying out air washing or gas-water combined washing on the flow biochemical ball filling layer 13; the back flushing air inlet pipes of the first flow-out purifying zone 6, the second flow-out purifying zone 7, the third flow-out purifying zone 8, the fourth flow-out purifying zone 9, the fifth flow-out purifying zone 10 and the sixth flow-out purifying zone 11 are sequentially a first back flushing air inlet pipe 64, a second back flushing air inlet pipe 74, a third back flushing air inlet pipe 84, a fourth back flushing air inlet pipe 94, a fifth back flushing air inlet pipe 104 and a sixth back flushing air inlet pipe 114, and the back flushing air spray pipes of the first flow-out purifying zone 6, the second flow-out purifying zone 7, the third flow-out purifying zone 8, the fourth flow-out purifying zone 9, the fifth flow-out purifying zone 10 and the sixth flow-out purifying zone 11 are sequentially a first back flushing air spray pipe 65, a second back flushing air spray pipe 75, a third back flushing air spray pipe 85, a fourth back flushing air spray pipe 95, a fifth back flushing air spray pipe 105 and a sixth back flushing air spray pipe 115.
It should be noted that, because of the higher dissolved oxygen in the tail water discharged by the aquaculture, the dissolved oxygen of the water body in the flow-away purifying device is gradually decreased, and the first flow-away purifying zone 6 and the second flow-away purifying zone 7 are in an aerobic environment; the third flow-off purifying zone 8 and the fourth flow-off purifying zone 9 are in a micro-oxygen environment; the fifth and sixth off-purification zones 10 and 11 are in a relatively anoxic environment; the method comprises the following steps: the whole environment still presents an aerobic state (DO is more than 2 mg/L); specifically, a biological film formed on the filler can form dissolved oxygen layering, namely, the surface is aerobic, and the inside is relatively anoxic; it is because the dissolved oxygen of the tail water is higher, and an anoxic environment which is favorable for denitrification is difficult to form, and the realization effect of the utility model under such difficult conditions is one of the key points of the utility model. Different dissolved oxygen environments promote the growth of different biological communities on the polyurethane suspension filler so as to achieve the purpose of efficiently purifying the aquaculture tail water, and the aquaculture tail water is finally discharged through the water outlet 3.
Flow separation (also commonly referred to as velocity separation) is a phenomenon of solid-liquid separation that occurs in nature. When solid particles flow in a fluid (or when the fluid flows through the solid particles), the flow velocity of different areas of the solid-liquid boundary layer is different due to the action of viscous force, a certain pressure difference is formed by the flow velocity difference, the solid particles are forced to rotationally move towards the direction of low flow velocity, and as a result, the solid particles always move and aggregate from the area with high flow velocity to the area with low flow velocity, which is called as flow-off. In the field of sewage treatment, the flow separation refers to the phenomenon that suspended substances (solid particles and activated sludge) in a sewage flow field are gathered from a place with a fast flow rate to a place with a slow flow rate, and is another solid-liquid separation technology except precipitation and filtration.
The flow-off biochemical method is also called as a flow-off biochemical reactor (FSBBR), and is a novel biological membrane method treatment technology which combines the flow-off principle with a biological contact oxidation mechanism and is applied to the field of sewage treatment. The flow-off biochemical method has the advantages of simple process flow, quick start, good treatment effect, simple and convenient operation, no sludge generation, small occupied area, cost saving and the like.
Example 3
The device for purifying the tail water of the aquaculture provided in the embodiment 2 is used for testing the treatment effect temperature of the tail water discharged by the aquaculture, and the specific testing process is as follows:
(1) This aquaculture tail water purification's deviceThe daily treated water volume of the design is 20m 3 And/d. In the equipment debugging period, daily water treatment quantity is gradually increased from small to large.
Day 1 to day 15 of the adjustment period, the daily treatment water quantity is about 8m 3 /d (intake water pump flow 3.3 m) 3 And/h, intermittently operating, starting for 0.5h, and stopping for 4.5 h);
the 16 th to 30 th day of the adjustment period, the daily treatment water quantity is about 13m 3 /d (intake water pump flow 3.3 m) 3 And/h, intermittently operating, starting for 0.5h, and stopping for 2.5 h);
the daily treatment water quantity is about 20m < 3 >/d (the flow rate of the water inlet pump is 3.3m < 3 >/h, the intermittent operation is carried out, the operation is started for 0.5h and stopped for 1.5 h) from the 31 st day to the 45 th day of the debugging period.
And debugging until the 45 th day and later, and stabilizing the treatment effect of the test equipment to meet the design requirement.
This step can be understood as establishing dominant bacterial flora; the equipment provided by the utility model is beneficial to the growth of the nitrogen removal dominant bacteria, and after long-time culture of the equipment, the population of the bacterial in the equipment is changed, so that the number of the effective bacterial capable of removing nitrogen is dominant, and the nitrogen removal effect is further formed; after the culture is carried out for a plurality of times, the nitrogen removal bacteria of the culture tail water can form advantages in the equipment so as to realize nitrogen removal. In order to obtain the nitrogen removal effect more quickly, the filler in the equipment with the established dominant bacterial group or dominant bacteria on the filler and the like can be accessed into new equipment, so that the new equipment can obtain the nitrogen removal effect reaching the standard within 15 days.
(2) The device for purifying the tail water of the aquaculture is provided with the non-closed cover plate at the top, so that on one hand, the produced gas in the equipment can overflow; on the other hand, the oxygen entering the equipment from the outside can be reduced, and an anoxic environment which is beneficial to denitrification in the equipment is created.
Example 4
The present example provides effect data of purifying tail water discharged from aquaculture using the apparatus for purifying tail water of aquaculture provided in example 2, the result of the effect data is shown in table 1, and the effect data is detected from the time when the treatment effect of the test equipment is stabilized and reaches the design requirement, and the total detection time is 7.
TABLE 1 Effect data of an apparatus for purification of Aquaculture Tail Water purification on Aquaculture discharged Tail Water
From the data in the table, the device for purifying the aquaculture tail water provided in the embodiment 2 is used for purifying the tail water discharged by aquaculture, the purifying effect is obvious, the purifying rate of total nitrogen in the tail water discharged by aquaculture is more than 30%, the purifying rate of nitrate nitrogen is more than 30%, and the purifying rate of suspended matters is more than 80%.
Comparative example
Unlike example 4, in the comparative example, in the case where the upper and lower trays 4 and 5 were not filled with the off-flow biochemical balls 12 and the off-flow biochemical ball filling layer 13 was not formed, effect data of purifying tail water discharged from aquaculture using a device for purifying tail water of aquaculture was obtained, and the effect data was obtained by adjusting the off-flow biochemical ball filling layer 13 from the completion of example 4 as shown in table 2, and was examined 4 times in total.
Table 2 effect data of the device for purifying aquaculture tail water provided in comparative example for purifying tail water discharged from aquaculture
From the data in the table, the device for purifying the aquaculture tail water provided by the comparative example is used for purifying the tail water discharged by aquaculture, the purifying effect is poor, the purifying rate of total nitrogen in the tail water discharged by aquaculture fluctuates about 15%, and the purifying rate of nitrate nitrogen also fluctuates about 15%.
The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings, but the present utility model is not limited to the described embodiments. It will be apparent to those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the utility model, and yet fall within the scope of the utility model.
Claims (10)
1. The utility model provides a device for purifying aquaculture tail water, its characterized in that includes the box, be equipped with the biochemical ball filling layer of circulation in the box, the biochemical ball filling layer of circulation fills the biochemical ball of circulation, the biochemical ball of circulation is the fretwork spheroid, the biochemical ball of circulation is filled with porous filler in the biochemical ball of circulation.
2. An aquaculture tail water purifying device according to claim 1 wherein said aquaculture tail water purifying device comprises a housing, said housing comprising an upper housing and a lower housing, said free flowing ball filling layer being secured between the upper housing and the lower housing.
3. The device for purifying tail water of aquaculture according to claim 1, further comprising a water inlet pipe, wherein one end of the water inlet pipe leaks out of the tank body, the other end of the water inlet pipe extends to the bottom of the tank body, and one end of the water inlet pipe leaks out of the tank body is a water inlet; the porous filler is at least one of PP, PE or polyurethane which is used for manufacturing a spongy filler.
4. The device for purifying tail water of aquaculture according to claim 1, wherein a partition plate is arranged in the box body to divide the box body into at least two off-flow purifying areas, water passing pipes are arranged between adjacent off-flow purifying areas, each off-flow purifying area is provided with the off-flow biochemical ball filling layer, and the water passing pipes are communicated from the upper part of the off-flow biochemical ball filling layer of the previous off-flow purifying area to the lower part of the off-flow biochemical ball filling layer of the next off-flow purifying area.
5. The aquaculture tail water purifying device according to claim 4, wherein five baffles are arranged in the box body to divide the box body into 6 flow-off purifying areas.
6. The apparatus of claim 4, wherein the bottom of the off-flow purification zone is provided with a drain.
7. An aquaculture tail water purification unit according to claim 6 wherein said drain is located diagonally from the bottom of said off-purification zone.
8. The device for purifying aquaculture tail water according to claim 2, further comprising a back flush system, wherein the back flush system comprises a back flush air inlet pipe and a back flush air jet pipe, the back flush air jet pipe is located below the lower bracket and is communicated with the back flush air inlet pipe, the back flush air inlet pipe is connected with a fan or an air pump, and gas sprayed by the back flush air jet pipe is used for carrying out gas washing or gas-water combined washing on a filling layer of the flow-off biochemical balls.
9. An aquaculture tail water purifying device according to claim 2 or 8 wherein said upper and lower brackets are hollow out racks of hard material.
10. An aquaculture tail water purifying device according to claim 1 wherein a plurality of said aquaculture tail water purifying devices are connected in series or in parallel.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116332339A (en) * | 2022-12-30 | 2023-06-27 | 广州资源环保科技股份有限公司 | A method and device for purifying aquaculture tail water |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116332339A (en) * | 2022-12-30 | 2023-06-27 | 广州资源环保科技股份有限公司 | A method and device for purifying aquaculture tail water |
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