CN117645389A - Aquaculture tail water treatment system - Google Patents
Aquaculture tail water treatment system Download PDFInfo
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- CN117645389A CN117645389A CN202410083968.9A CN202410083968A CN117645389A CN 117645389 A CN117645389 A CN 117645389A CN 202410083968 A CN202410083968 A CN 202410083968A CN 117645389 A CN117645389 A CN 117645389A
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Landscapes
- Purification Treatments By Anaerobic Or Anaerobic And Aerobic Bacteria Or Animals (AREA)
Abstract
The invention discloses an aquaculture tail water treatment system, which is characterized in that a microporous filter is used for filtering fish manure and garbage, a microbial preparation is added to complete protein separation and precipitation, pollutants are changed into short chains which are easy to biochemically through hydrolysis acidification, all functional water is sent out by utilizing a low-power high-flow submersible pump after entering an aeration tank, magnetized water and small molecules have strong permeability and magnetization, the residence time of bubbles is prolonged, the oxygenation of a water body is rapid due to the characteristic of long residence time of micro-nano bubbles, the pollutants are precipitated by ionic gas, the microorganism is activated, the biochemical rate is improved, the rotational circulation flow of water outlet of the water body enables the pollutants to be removed more rapidly, the water inlet of the low-power high-flow submersible pump is placed in the center of a microbial filler, the water body is continuously fed into the microbial filler to be subjected to contact oxidation reaction with the filler, so that the nitrification and denitrification effect is better, and the sulfur autotrophic denitrification filler realizes effective denitrification, and solves the problems of insufficient carbon source and difficult denitrification of the water body.
Description
Technical Field
The invention relates to the technical field of aquaculture, in particular to an aquaculture tail water treatment system.
Background
The tail water refers to a polluted water body caused by residual baits and feces in the aquaculture process, and ammonia nitrogen, nitrite nitrogen, nitrate nitrogen, organic matters, phosphorus and harmful microorganisms can be generated in the aquaculture tail water, so that if the aquaculture tail water cannot be treated effectively in time, the environment of an aquaculture water area can be deteriorated, and outbreak diseases such as fishes, shrimps and crabs and the like and even large-area death can be caused, and the quality and the yield of aquaculture products are directly reduced and the environment is polluted.
The existing treatment method for the culture tail water comprises two conventional treatment methods, namely chemical treatment and physical treatment, wherein the chemical treatment is generally based on the components of pollutants in sewage, a certain chemical for changing the chemical property or physical property of the pollutants is researched, and the pollutants in the water are removed through oxidation, neutralization, coagulating sedimentation and other reactions, but other pollutants are often generated in the treatment process, so that secondary pollution is caused, and the physical treatment has the defects that the pollutants are only transferred instead of converted and broken, the treatment is not thorough enough, and particularly the total phosphorus and total nitrogen cannot reach the standard after the treatment.
Disclosure of Invention
(one) solving the technical problems
Aiming at the defects of the prior art, the invention provides an aquaculture tail water treatment system for solving the technical problems.
(II) technical scheme
In order to solve the technical problems, the invention provides the following technical scheme: an aquaculture tail water treatment system comprising: the tail water ditch is used for collecting tail water discharged from the fishpond; the microporous filter is arranged in the tail water ditch and is used for physically intercepting tail water in the tail water ditch to remove impurities and fish feces and sterilize; the water collecting tank is used for receiving the tail water output by the tail water ditch and uniformly mixing the water body; a microorganism storage tank for storing a microorganism preparation, which is arranged adjacent to the primary sedimentation tank and used for conveying the microorganism preparation to the primary sedimentation tank, wherein the microorganism preparation is mixed with tail water and then sedimented; the first-stage sedimentation tank is used for receiving the water body output by the water collecting tank and performing physical sedimentation, wherein the first-stage sedimentation tank is arranged in a strip shape, and the number of the first-stage sedimentation tanks is two; the hydrolysis acidification tank is used for receiving the supernatant output by the primary sedimentation tank, decomposing macromolecular organic substances into micromolecular organic substances through the action of bacteria and enzymes, and decomposing the micromolecular organic substances into simple organic substances and gases by anaerobic microorganisms; the aeration tank is used for receiving the water body output by the hydrolysis acidification tank; the suspended ball biological stuffing box is in a rectangular solid shape and is suspended at the center of the aeration tank, wherein the suspended ball biological stuffing box comprises a box body, a buoyancy element and a suspended biological stuffing layer, the outer wall of the box body is composed of a stainless steel screen, the biological stuffing layer is arranged at the bottom of a containing cavity of the box body, the buoyancy element is arranged at the top wall of the box body, the suspended biological stuffing layer is composed of a spherical plastic shell, ceramsite and soft stuffing are filled in the plastic shell, and a plurality of fine holes are formed in the plastic shell at intervals; the low-power large-flow submersible pumps are arranged in the top edge of the suspended ball biological stuffing box at intervals and are used for pumping water bodies in the accommodating cavity of the suspended ball biological stuffing box into the aeration tank, an input port of the low-power large-flow submersible pump is connected with a water inlet flower basket head through a hose, and the water inlet flower basket head is arranged at the center of the biological stuffing layer, so that water of the low-power large-flow submersible pump is sucked from the center of the biological stuffing layer; the negative ion devices are arranged in the suspended ball biological stuffing box and are used for generating ion gas and conveying the ion gas to the low-power high-flow submersible pump so as to dissolve the ion gas generated by the negative ion devices into water and enable charges generated by the water to adhere to pollutant precipitation, so that microorganisms are activated and the biochemical rate is improved; the magnetic devices are arranged in the suspended ball biological stuffing box and are used for enabling a water body to enter a high-strength magnetic cutting channel for magnetization so as to form magnetic water and conveying the magnetic water for the low-power high-flow submersible pump; the small molecular water generators are arranged in the suspended ball biological stuffing box and are used for generating small molecular water with strong permeability and conveying the small molecular water for the low-power large-flow submersible pump so as to increase the residence time of microbubbles by a plurality of times; the plurality of nanomachines are arranged in the suspension ball biological stuffing box and are used for generating micro-nano gas for the low-power high-flow submersible pump; the second-stage sedimentation tank is used for receiving the water body output by the aeration tank; the filtering dam is arranged between the secondary sedimentation tank and the output port of the aeration tank, and is provided with a nano material for decomposing organic matters in the water body flowing from the aeration tank to the secondary sedimentation tank and removing heavy metals; the sulfur autotrophic filler filter tank is used for receiving the water body output by the secondary sedimentation tank and performing sulfur autotrophic denitrification treatment; the clean water tank is used for receiving the water body output by the sulfur autotrophic filler filter tank and discharging the water body back to the fish pond after judging that the water body reaches the standard; the low-power high-flow submersible pumps are arranged under the water surface of the suspended ball biological stuffing box at intervals, the water outlet directions of the low-power high-flow submersible pumps are different, and the water outlet directions of the low-power high-flow submersible pumps push and spray water according to clockwise or anticlockwise fan blades, so that the water area formed by the water outlet flows in a rotating and circulating mode.
Furthermore, the input port of each low-power large-flow submersible pump is respectively provided with a plurality of input pipes connected with the negative ion equipment, the magnetic equipment, the small molecular water generator and the nano machine.
Further, the method further comprises the following steps: the first sludge concentration tank is arranged between the two primary sedimentation tanks and is used for obtaining sludge of the two primary sedimentation tanks; the first filter press is used for carrying out filter pressing on the sludge in the first sludge concentration tank, so that the sludge after filter pressing is stored on a mud airing field and is dried to be used as fertilizer; the material room is arranged between the two first-stage sedimentation tanks and is used for storing goods.
Further, the method further comprises the following steps: the fan room is arranged on the bank of the aeration tank and is used for storing an air suspension variable-frequency fan and standby equipment; the second sludge concentration tank is arranged between the primary sedimentation tank and the secondary sedimentation tank and is used for obtaining sludge in the primary sedimentation tank and the secondary sedimentation tank; the second filter press is used for carrying out filter pressing on the sludge in the second sludge concentration tank, so that the sludge after filter pressing is stored on a mud airing field and is dried to be used as fertilizer; and the mud airing field is arranged between the primary sedimentation tank and the secondary sedimentation tank and is adjacent to the second mud concentration tank and is used for acquiring the filter-pressed mud output by the first filter press and the second filter press and taking the filter-pressed mud as fertilizer after air blast airing.
Further, the method further comprises the following steps: the disinfection pond is used for disinfecting and discharging tail water which is required to be discharged after treatment, wherein the disinfection pond comprises a plurality of ascending flow pipelines which are vertically arranged, and each ascending flow pipeline is internally provided with an ultraviolet lamp tube which is strip-shaped and used for disinfecting water flowing through the flow pipeline.
Further, the bottom of the primary sedimentation tank and the bottom of the secondary sedimentation tank are provided with a certain gradient, the bottom of the primary sedimentation tank is provided with a sludge collecting pipe, and the sludge collecting pipe is connected with a sludge pump so as to extract sludge at the bottoms of the primary sedimentation tank and the secondary sedimentation tank through the sludge pump.
Further, the method further comprises the following steps: and the reflux pump is used for refluxing the supernatant of the secondary sedimentation tank to the primary sedimentation tank and/or the hydrolytic acidification tank with more than 20% of water so as to improve the biochemical rate.
Furthermore, the sulfur autotrophic filler filter tank adopts a sulfur iron mineral substance as a filter filler, and the total nitrogen is removed by a sulfur autotrophic denitrification technology.
(III) beneficial effects
Compared with the prior art, the invention provides an aquaculture tail water treatment system, which comprises the following components
The beneficial effects are that:
1. the invention converts tail water into magnetic water through magnetic equipment, and generates small molecular water through a small molecular water generator, the two types of water have strong permeability, the residence time of micro bubbles is increased by more than 15 times, oxygenation is rapid, and the strong permeability of the magnetic water and the small molecular water is beneficial to digestion of sludge and replacement of dredging, thereby achieving the effect of improving the biochemical rate of degrading pollutants by microorganisms;
2. according to the invention, the ion generator is used for generating ion gas, so that the ion gas is dissolved in tail water, the ions generate charges and polarities to enable pollutants to be bonded and precipitated, and microorganisms are activated to improve the biochemical rate by more than 23%, so that the effects of effectively degrading the pollutants and recovering ecological chains are achieved;
3. the invention solves the problem of insufficient carbon source through the nitrification and denitrification of the sulfur self-oxygen filling filter tank, so that air and anaerobic degradation products provide sufficient carbon source, solves the problem of insufficient carbon source of water body, and has more remarkable dephosphorization and denitrification;
4. the micro-nano gas bubbles generated by the nano machine have long residence time, the micro-bubbles are easier to dissolve in water, and the ionic gas enters the water to generate charges so as to precipitate pollutants and activate microorganisms to improve the biochemical rate;
5. the low-power high-flow submersible pump is arranged under the water surface of the suspended ball biological stuffing box, the water and the air are sprayed by the power high-flow submersible pump according to clockwise or anticlockwise blade type push flow, the water is sucked from the center of the stuffing, and the water forms rotary circulating flow in a water area;
6. the sulfur autotrophic filler filter tank adopts substances such as pyrite and the like as filter fillers, and realizes the removal of total nitrogen by a sulfur autotrophic denitrification technology, the technical principle is that reduced sulfur sources such as sodium sulfide (Na 2S), sodium thiosulfate (Na 2S2O 3), elemental sulfur (S) and the like are used as electron donors, CO32-, HCO 3-and CO2 are used as inorganic carbon sources, NO 3-N is reduced to N2 in an anoxic environment, and the sulfur autotrophic filler filter tank is one of the best technologies for replacing the traditional heterotrophic denitrification technology when treating low C/N sewage, does not need to add a carbon source, saves the consumption of the carbon source, consumes the filler per se, does not need to be replaced, and directly adds the carbon source, thus solving the problems of insufficient carbon source and denitrification.
Drawings
FIG. 1 is a schematic diagram of an aquaculture tail water treatment system according to the present invention;
FIG. 2 is a schematic diagram of a running water trend structure of the aquaculture tail water treatment system of FIG. 1;
FIG. 3 is a schematic cross-sectional view of the floating ball bio-stuffing box of FIG. 1;
FIG. 4 is a schematic diagram of the sedimentation tank in FIG. 1;
fig. 5 is a schematic view of the structure of the sterilizing pond of fig. 1.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
As shown in fig. 1 to 5, the present invention provides an aquaculture tail water treatment system comprising a tail water ditch 10, a microporous filter 11, a water collecting tank 12, a primary sedimentation tank 13, a microbial storage tank 15, a hydrolytic acidification tank 16, an aeration tank 18, a suspended ball bio-filler box 19, a plurality of low-power large-flow submersible pumps 20, a plurality of negative ion devices 21, a plurality of magnetic devices 22, a plurality of small molecule water generators 17, a plurality of nanomachines 23, a secondary sedimentation tank 24, a filter dam 25, a sulfur autotrophic filler filter tank 26 and a clean water tank 27.
The tail water channel 10 is used for collecting tail water discharged from the fish pond.
A microporous filter 11 is provided in the tail water channel 10 for physically intercepting the tail water in the tail water channel 10 to remove impurities and fish feces and sterilizing.
The water collecting tank 12 is used for receiving the tail water output by the tail water ditch 10 and uniformly mixing the water body.
A microbiological reservoir 15 is provided for storing the microbiological agent and is disposed adjacent the primary sedimentation tank 13 for transporting the microbiological agent toward the primary sedimentation tank 13.
It should be understood that the microbial preparation is mixed with the tail water and then precipitated, so that the microbial preparation can be effectively contacted with pollutants in the tail water sufficiently to form floccules and precipitates which can be further processed, the pollutants are rapidly removed, the precipitation of the microbial preparation on the tail water has no influence on a later biochemical system, and the microbial preparation has a promoting effect, so that the biochemical effect of the pollution treatment process is effectively improved, and the microbial preparation has the advantages of low energy consumption, good effect, simplicity in operation and the like. Meanwhile, the microbial preparation performs active activation on microorganisms in the water environment due to the long-term anaerobic or anoxic state.
The primary sedimentation tank 13 is used for receiving the water body output by the water collecting tank 12 and performing physical sedimentation, wherein the primary sedimentation tank 13 is arranged in a strip shape, and preferably, the number of the primary sedimentation tanks 13 is two.
The hydrolysis acidification tank 16 is used for receiving the supernatant output by the primary sedimentation tank 13, decomposing macromolecular organic substances into micromolecular organic substances through the action of bacteria and enzymes, and further decomposing the micromolecular organic substances into simple organic substances and gases by anaerobic microorganisms. It should be understood that hydrolysis refers to a process that macromolecular organic substances in organic wastewater are decomposed into small molecular organic substances in a hydrolysis acidification tank, and complex organic substances in the organic wastewater are decomposed into small molecular organic substances and gas under the action of microorganisms, and certain temperature and pH conditions exist in the hydrolysis acidification tank 16 in the embodiment so as to be beneficial to the growth and activity of microorganisms. In addition, the treatment effect of the hydrolytic acidification tank 16 is very important for the subsequent biological treatment process because the hydrolytic acidification tank can decompose complex organic substances in the organic wastewater into substances which are easier to be degraded by microorganisms, thereby providing better conditions for the subsequent aerobic biological treatment or anaerobic biological treatment and improving the treatment efficiency and stability of the whole wastewater treatment system.
The aeration tank 18 is configured to receive the water output from the hydrolytic acidification tank 16.
The suspended ball biological stuffing box 19 is in a rectangular solid shape, wherein the suspended ball biological stuffing box 19 is suspended and arranged at the center of the aeration tank 18.
Preferably, the suspended ball bio-stuffing box 19 is fixedly arranged at the bottom of the aeration tank 18 through a long rope with the length of 40 cm, namely, one end of the long rope is fixedly arranged at the bottom wall of the center of the aeration tank 18, and the other end of the long rope is fixedly arranged at the bottom wall of the suspended ball bio-stuffing box 19, so that the suspended ball bio-stuffing box 19 can float in the aeration tank 18 in the length range of the long rope, and the suspended ball bio-stuffing box 19 can be pushed to move by water sprayed by the low-power high-flow submersible pump 20, and the water in the aeration tank 18 can be driven to flow.
Preferably, the suspended ball bio-filler box 19 comprises a box body, a buoyancy element 191 and a suspended bio-filler layer 192, wherein the outer wall of the box body is composed of a stainless steel screen, the bio-filler layer 192 is arranged at the bottom of a containing cavity of the box body, and the buoyancy element 191 is arranged at the top wall of the box body. It will be appreciated that the body of water is filtered through the stainless steel mesh and then into the layer of bio-filler 192, and the buoyancy generated by the buoyancy element 191 is sufficiently large to enable the suspension ball bio-filler box 19 to be suspended in the body of water in the aeration tank 18.
Further, the suspended bio-filler layer 192 is composed of a spherical plastic casing filled with ceramsite and soft filler, and a plurality of fine holes are formed in the plastic casing at intervals.
It should be understood that the biofilm grows on the filler of the biological filler layer 192 of the suspended ball biological filler box 19, and in the contact process of water and the biofilm, organic matters in the water are adsorbed, oxidized, decomposed and converted into new biofilms by microorganisms in the biofilm, and nitrification and denitrification are performed on the filler under the conditions of microorganism contact oxidation and drop oxygenation, so that the difficult problem of insufficient carbon sources in the water body is effectively solved, and the dephosphorization and denitrification effects are effectively improved.
A plurality of low power high flow submersible pumps 20 are spaced apart in the top edge of the suspended ball bio-stuffing box 19 for pumping the body of water within the receiving cavity of the suspended ball bio-stuffing box 19 into the aeration tank 18.
Preferably, the input port of the low power high flow submersible pump 20 is connected with a water-in basket 202 through a hose 201, and the water-in basket 202 is disposed at the center of the bio-filler layer 192, so that water of the low power high flow submersible pump 20 is sucked from the center of the bio-filler layer 192.
A plurality of negative ion devices 21 are arranged in the suspended ball bio-stuffing box 19 for generating ion gas and delivering the ion gas to the low-power high-flow submersible pump 20 so as to dissolve the ion gas generated by the negative ion devices 21 into water and enable charges generated by the water to adhere to pollutant precipitation so as to activate microorganisms and improve the biochemical rate.
A plurality of magnetic devices 22 are provided in the floating ball bio-stuffing box 19 for allowing a body of water to enter a high-strength magnetic cutting path for magnetization to form magnetic water and for delivering the magnetic water to the low-power high-flow submersible pump 20.
A plurality of small molecular water generators 17 are provided in the suspended ball bio-stuffing box 19 for generating small molecular water having strong permeability and delivering the small molecular water to the low power large flow submersible pump 20 to multiply the residence time of the microbubbles.
A plurality of nanomachines 23 are disposed in the suspended ball bio-stuffing box 19 for generating micro-nano gas for the low power high flow submersible pump 20. It should be appreciated that the micro-nano gas bubbles generated by the plurality of nanomachines 23 have a long residence time and the micro-bubbles are more easily dissolved in the water.
It should be understood that the magnetic device 22 is used to make a water body enter a high-strength magnetic cutting channel to magnetize so as to form magnetic water, the small molecular water generator 17 is used to generate small molecular water, and the magnetic water and the small molecular water have strong water permeability, so that the residence time of micro-bubbles can be doubled, and the residence time of micro-nano gas bubbles generated by the nano machine 23 is long.
In this embodiment, the plurality of low-power high-flow submersible pumps 20 are arranged under the water surface of the suspended ball biological stuffing box 19 at intervals, the water outlet directions of the plurality of low-power high-flow submersible pumps 20 are different, the water outlet directions of the plurality of low-power high-flow submersible pumps 20 push and spray water according to clockwise or anticlockwise fan blade type impeller flow, that is, the plurality of water outlet directions of the plurality of low-power high-flow submersible pumps 20 are in a ring shape, so that the water area formed by the water outlet flows in a rotating and circulating manner, and the rotating and circulating water body respectively and continuously enters the suspended ball biological stuffing box 19 to continuously perform contact oxidation reaction with the stuffing, so that the nitrification and denitrification effect is better.
It will be appreciated that the low power high flow submersible pump 20 is vertically liftable and lowerable disposed on the outer side wall of the floating ball bio-stuffing box 19 so that the depth of the low power high flow submersible pump 20 in the body of water can be varied as desired. Specifically, the outer side wall of the suspended ball bio-stuffing box 19 is provided with a sliding rail along the vertical direction, a sliding block is arranged in the sliding rail in a sliding manner, and the low-power high-flow submersible pump 20 is fixedly arranged in the sliding block, so that the low-power high-flow submersible pump 20 is arranged in the sliding rail in a sliding manner along with the sliding block.
Further, in some embodiments, the outer side wall of the suspended ball bio-stuffing box 19 is provided with a plurality of first clamping holes at intervals along the vertical direction, the plurality of first clamping holes are arranged in parallel with the sliding rail at intervals, the sliding block is extended to be provided with an extension plate, the extension plate is provided with a second clamping hole corresponding to the first clamping hole, and clamping rods are inserted into the second clamping hole and the first clamping hole, so that the clamping rods can be inserted into the first clamping holes at different positions according to the needs, and the depth of the low-power high-flow submersible pump 20 in a water body is changed.
Further, in some embodiments, the outer side wall of the suspended ball bio-stuffing box 19 is provided with a plurality of clamping holes at intervals along the vertical direction, the clamping holes are provided with clamping rods in a pluggable manner, the clamping rods are connected with pull ropes, wherein the outer wall of the low-power high-flow submersible pump 20 arranged in the sliding block is fixedly provided with a buoyancy block, the buoyancy of the buoyancy block in the water body is far greater than the weight of the low-power high-flow submersible pump 20, the low-power high-flow submersible pump 20 is connected with the pull ropes, so that the clamping rods pull and fix the low-power high-flow submersible pump 20 at a preset position through the pull ropes, that is, under normal conditions, the buoyancy block drives the low-power high-flow submersible pump 20 to float upwards, and the pull ropes pull the low-power high-flow submersible pump 20 to float at the preset position, so that the clamping rods can be inserted at different positions according to needs to realize the adjustment of the floating position of the low-power high-flow submersible pump 20.
Further, in some embodiments, the water outlet of the low-power high-flow submersible pump 20 may be disposed underwater, or may be disposed on the water surface, and the water outlet of the low-power high-flow submersible pump 20 is rotatably disposed, or the low-power high-flow submersible pump 20 is rotatably disposed on the outer side wall of the suspended ball bio-stuffing box 19, so that the direction of the water outlet of the low-power high-flow submersible pump 20 may be changed as required to change the water outlet direction of the low-power high-flow submersible pump 20.
Preferably, the smaller the size (i.e., horizontal area) of the aeration tank 18, the smaller the angle between the water outlet direction of the low-power high-flow submersible pump 20 and the side of the suspended-ball bio-filler box 19, and the larger the size (i.e., horizontal area) of the aeration tank 18, the larger the angle between the water outlet direction of the low-power high-flow submersible pump 20 and the side of the suspended-ball bio-filler box 19, so that more water flow can be promoted.
Further, each of the low-power high-flow submersible pumps 20 disposed at the top edge of the floating ball bio-stuffing box 19 is provided with a unique serial number, and the water outlet directions of the low-power high-flow submersible pumps 20 disposed around the top edge of the floating ball bio-stuffing box 19 are different, i.e., the water outlet directions of the low-power high-flow submersible pumps 20 arranged in sequence are arranged in gradually increasing directions, for example, the water outlet direction of the low-power high-flow submersible pump 20 with serial number 1 (referring to the side surface of the floating ball bio-stuffing box 19) is 20 degrees, the water outlet direction of the low-power high-flow submersible pump 20 with serial number 2 is 30 degrees, the water outlet direction of the low-power high-flow submersible pump 20 with serial number 3 is 40 degrees, etc.
Preferably, the input port of each low-power high-flow submersible pump 20 is respectively provided with a plurality of input pipes 200 connected with the negative ion device 21, the magnetic force device 22, the small-molecule water generator 17 and the nanomachines 23, so that the ionic gas generated by the negative ion device 21 enters the low-power high-flow submersible pump 20 through the input pipes 200, the magnetic water generated by the magnetic force device 22 enters the low-power high-flow submersible pump 20 through the input pipes 200, the small-molecule water generated by the small-molecule water generator 17 enters the low-power high-flow submersible pump 20 through the input pipes 200, and the micro-nano gas generated by the nanomachines 23 enters the low-power high-flow submersible pump 20 through the input pipes 200.
It is understood that the residence time of the micro-bubbles with the characteristics of magnetic water and micromolecular water in the water body is increased by 15 times, the penetrability is strong, meanwhile, the residence time of the micro-nano gas bubbles is long, the micro-bubbles are easier to dissolve in the water, the micro-bubbles can penetrate the lower layer of the sludge together with microorganisms and play a role in digestion, the sludge is rapidly reduced, dredging is directly replaced, and the micro-nano water-based magnetic water-based micro-bubble water-based magnetic water-based micro-bubble is more suitable for the propagation and growth of fishes. The ionic gas is brought into water to generate very dense and fine bubbles in the water, so that the viscosity of the water and oxygen is increased, the charges and the polarity in the water are also increased, pollutants are promoted to be precipitated, the charged ions of the water are caused to adhere and precipitate, the molecules with the polarity excite the propagation of aquatic animals and plants through the ions, microorganisms are activated, water molecules are also activated, the biochemical rate is improved by 20% -30%, biological chains are quickly recovered, and the water is clear.
It should be understood that this embodiment can make the water body in the aeration tank 18 circulate continuously, on one hand, the nitrification and denitrification are completed by the suspended ball bio-stuffing box 19, on the other hand, the water flow and up-down displacement are sufficient by the plurality of low-power high-flow submersible pumps 20, the water body is oxygenated and the pollutants are digested, the plurality of low-power high-flow submersible pumps 20 have magnetic force and ion functions, and the up-down level displacement of the water body is more sufficient by the water displacement and water circulation in the treatment.
The secondary sedimentation tank 24 is used for receiving the water body output by the aeration tank 18. It should be appreciated that the generation of large amounts of small molecular water by ion superposition in the secondary sedimentation tank 24 is more advantageous for microbial utilization, the permeability is stronger, the nano-ion gas provides the energy required by various microorganisms with oxygen, hydrogen and carbon dioxide, when the population of microorganisms increases, large aquatic organisms appear and rapidly proliferate, thereby forming an aquatic food chain, eventually removing all the pollutants and the like in the water body, and maintaining the quality water body for a long time.
In this embodiment, the bottoms of the primary sedimentation tank 13 and the secondary sedimentation tank 24 are provided with a certain gradient, the sludge of the primary sedimentation tank 13 and the secondary sedimentation tank 24 gradually sediments in the bottom, the bottom is provided with a sludge collecting pipe, and the sludge collecting pipe 131 is connected with a sludge pump 132 to extract the sludge at the bottoms of the primary sedimentation tank 13 and the secondary sedimentation tank 24 by the sludge pump 132. It should be appreciated that the sludge pump 132 pumps the sludge from the bottoms of the primary and secondary settling tanks 13, 24 into the first and/or second sludge concentration tanks 28, 31.
Preferably, the number of the sludge collection pipes 131 is plural, the plural sludge collection pipes 131 are arranged at intervals in the horizontal direction and connected to the bottoms of the primary sedimentation tank 13 and the secondary sedimentation tank 24, and the aperture of the plural sludge collection pipes 131 is arranged in a gradually increasing manner from top to bottom, because the deeper the bottom, the more the sludge is settled, and the larger the aperture of the sludge collection pipes 131 is required for suction.
Further, the aquaculture tail water treatment system further comprises a reflux pump 133, wherein the reflux pump 133 is used for refluxing the supernatant of the secondary sedimentation tank 24 to the primary sedimentation tank 13 and/or the hydrolytic acidification tank 16 with more than 20% of water so as to improve the biochemical rate. That is, the reflux pump 133 will re-convey a small portion of the supernatant from the secondary sedimentation tank 24 back to be treated again.
A filter dam 25 is provided between the secondary sedimentation tank 24 and the outlet of the aeration tank 18, wherein the filter dam 25 is provided with nano-materials for decomposing organic matters and removing heavy metals from the water flowing from the aeration tank 18 into the secondary sedimentation tank 24.
The sulfur autotrophic filler filter 26 is configured to receive the water output from the secondary sedimentation tank 24 and perform sulfur autotrophic denitrification.
Preferably, the autotrophic-filler filter tank 26 uses pyrite material as a filter filler to effect total nitrogen removal using sulfur autotrophic denitrification techniques. It is understood that the total nitrogen is removed by adopting substances such as pyrite and the like as filtering fillers and adopting a sulfur autotrophic denitrification technology, the technical principle is that reduced sulfur sources such as sodium sulfide (Na 2S), sodium thiosulfate (Na 2S2O 3), elemental sulfur (S) and the like are taken as electron donors, CO32-, HCO 3-and CO2 are taken as inorganic carbon sources, NO 3-N is reduced to N2 in an anoxic environment, and the method is one of the best processes for replacing the traditional heterotrophic denitrification process when treating low-C/N sewage, does not need to add a carbon source, saves the consumption of the carbon source, consumes the fillers per se, does not need to be replaced, and directly adds the fillers, thereby solving the problems of insufficient carbon source and denitrification.
The clean water tank 27 is used for receiving the water body output by the sulfur autotrophic filler filter tank 26 and discharging the water body back to the fish pond after the water body is judged to reach the standard.
It should be appreciated that the sulfur autotrophic denitrification of the autotrophic filler-filtering ponds 26 is a process for oxidizing nitrate to harmless nitrogen gas using sulfur oxidizing bacteria, and includes the steps of oxidation, nitrification and sulfidation, wherein nitrate is oxidized to nitrate, nitrate is reduced to nitrogen gas during nitrification, and sulfate is oxidized to sulfate during sulfidation. Further, in order to control the oxidation reaction of nitrate, the temperature, the pH value and the dissolved oxygen level need to be regulated, the biological control of nitrate is an effective pollution control method, the sulfur autotrophic denitrification is a widely applied technology, and after the principle of the sulfur autotrophic method is used for removing pollutants, the pollutants are discharged after reaching the standard through a clean water tank 27.
Further, the aquaculture tail water treatment system further comprises a first sludge thickener 28, a first filter press and a material compartment 29.
Preferably, a first sludge concentration tank 28 is provided between the two primary sedimentation tanks 13 for taking out sludge of the two primary sedimentation tanks 13. The first filter press is used for carrying out filter pressing on the sludge in the first sludge concentration tank 28, so that the sludge after filter pressing is stored on a mud airing field and is dried in the air to be used as fertilizer. The material compartment 29 is arranged between the two primary sedimentation tanks 13 for storing goods.
Further, the aquaculture tail water treatment system further comprises a fan room 30, a second sludge concentration tank 31, a second filter press and a sludge drying field 32.
Preferably, the fan house 30 is arranged between the primary sedimentation tank 13 and the secondary sedimentation tank 24 and is used for storing electric equipment; the second sludge concentration tank 31 is arranged between the primary sedimentation tank 13 and the secondary sedimentation tank 24 and is used for obtaining sludge in the primary sedimentation tank 13 and the secondary sedimentation tank 24; the second filter press is used for carrying out filter pressing on the sludge in the second sludge concentration tank 24, so that the sludge after filter pressing is stored on a mud airing field and is dried in the air to be used as fertilizer; the mud airing field 32 is arranged between the primary sedimentation tank 13 and the secondary sedimentation tank 24 and adjacent to the second mud concentrating tank 31, and is used for obtaining the filter-pressed mud output by the first filter press and the second filter press, and airing the filter-pressed mud as fertilizer.
Further, in some embodiments, the aquaculture tail water treatment system further comprises a disinfection tank 30, wherein the disinfection tank 30 is used for disinfecting tail water to be discharged after treatment. Preferably, the sterilizing tank 30 includes a plurality of ascending flow pipes 301 vertically disposed, and each of the ascending flow pipes 301 is provided therein with an ultraviolet lamp tube 302 in an elongated shape for sterilizing a water body flowing through the flow pipe 301.
Specifically, the tail water treatment process flow of the aquaculture tail water treatment system comprises the following steps:
1. the particles and the excrement are filtered and removed by using a microporous filter 11 at the front section of the tail water discharge ditch of the aquaculture entering the treatment site, so that the pollution load of the rear-section process is reduced, and the filtered water enters the water mixing area of the water collecting tank.
2. The water collecting tank adopts a submerged pump to achieve a horizontal flow type water inlet method without lifting, namely a power-saving water inlet method, and after the submerged pump is added with a microbial preparation to be fully mixed with tail water, the microbial preparation is deposited in a deep water sedimentation ditch, more than 80% of pollutants are effectively removed, the sludge in the sedimentation ditch is pumped into the sludge concentration tank by using a movable sludge pump or a perforated pipe, and is pumped into a mud-airing field to be dried after being concentrated, so that the method is simple and practical, and cement-based construction is not needed. The microbial preparation precipitation technology improves the sewage treatment and purification speed, and uses microorganisms to purify, and after part of pollutants which are not decomposed and the condensate generated by positive and negative charges of ions are deposited on the river bottom, the microorganisms continue to digest and purify the pollutants, and the microbial preparation is harmless to fish, shrimp, animals and plants. Microorganisms can be effectively and fully contacted with pollutants in sewage to form floccules and sediments which can be further treated, so that the pollutants are rapidly removed, and the biological agent sedimentation technology has no influence on a subsequent biochemical system and has a promoting effect. The biochemical effect of the pollution treatment process is effectively improved, and the method has the advantages of low energy consumption, good effect, simple operation and the like. Microorganisms perform active activation on microorganisms in an aqueous environment due to long-term anaerobic or anoxic conditions. The ionic superposition is used for generating a large amount of small molecular water, which is more beneficial to the utilization of microorganisms, so that the permeability is stronger, and the nano-ion gas provides various energy required by the microorganisms with oxygen and carbon dioxide. When the population of microorganisms increases, macrophytes appear and rapidly multiply, thereby forming an aquatic organism chain, finally removing pollutants in the water body and keeping the water body of high quality for a long time.
3. The supernatant after precipitation is lifted to a suspended ball biological stuffing box 19 which is arranged on the water surface by a plurality of low-power large-flow submersible pumps 20 through a hydrolytic acidification tank 16 to complete the contact oxidation reaction of microorganism stuffing, and organic matters in water are adsorbed, oxidized and converted into new biological films by microorganisms in the contact process of the biological films due to the fact that the biological films are fully grown on the stuffing, and nitrification and denitrification are simultaneously carried out on the stuffing under the conditions of microorganism contact oxidation and drop oxygenation, so that the difficult problem of insufficient carbon sources of the water is effectively solved, and the dephosphorization and denitrification effects are effectively improved.
4. Let the water get into in the aeration tank, the play water direction of a plurality of low-power large-traffic immersible pumps 20 is all different, make the play water direction of a plurality of low-power large-traffic immersible pumps 20 push away the class blowout water according to clockwise or anticlockwise fan blade formula, let the continuous circulation flow of water in the pond, accomplish nitrify and denitrification through in the suspension ball bio-packing box 19 on the one hand, on the other hand let water rotatory circulation flow and upper and lower replacement abundant, oxygenate the water and clear up the pollutant, this low-power large-traffic immersible pump 20 output micro-nano gas and have magnetic force and ion function, it is more abundant to let water level displacement from top to bottom through water replacement and hydrologic cycle in the treatment.
5. And then decomposing organic matters through a filtering dam made of nano materials, and removing heavy metals, wherein the filtering fully considers the problem that the filtering dams of two three ponds are always blocked, and adopts a method of packing fillers by plastic balls as a filtering material of the dams, so that the filtering dams are ensured not to be blocked.
6. And after the filtering dam, precipitating the microbial old mud generated in the aeration process of the aeration tank through a precipitation ditch. A sufficient length of the sedimentation tank and a sufficient residence time and act as a transition tank.
7. In order to remove total nitrogen under the conditions of low water concentration and insufficient carbon source, substances such as pyrite and the like are used as fillers for filtering, and sulfur autotrophic denitrification is a process for oxidizing nitrate into harmless nitrogen by utilizing sulfur oxidizing bacteria. The method comprises the steps of oxidation, nitration and vulcanization, wherein nitrate is oxidized into nitrate, nitrate is reduced into nitrogen in the nitration process, and sulfate is oxidized into sulfate in the vulcanization process. To control the oxidation reaction of nitrate, it is necessary to adjust the temperature, pH and dissolved oxygen level. Biological control of nitrate is an effective pollution control method, and sulfur autotrophic denitrification is a widely used technology. And after removing pollutants by using the sulfur autotrophic method principle, the pollutants are discharged after reaching the standard through a clean water tank.
Meanwhile, the tail water treatment process has the following technical effects that:
(1) The treated external drainage is more suitable for being recycled in the fishpond due to the biological diversification of the water body.
(2) The drop microbial filler treatment effect of each cubic meter is equivalent to the treatment effect of 160 square meters of wetland area, and the trouble of operation and management of the wetland is eliminated.
(3) The whole process has high automation degree, can save manpower and material resources, particularly save electricity during operation, and can save a lot of operation cost.
(4) The area of the land is less, the area of the land is reduced by more than one third compared with the technology of three ponds and two dams, the area of the land for treating the tail water of the fish pond with 1000 mu is 22 mu to 28 mu, the investment cost is saved, the investment cost is reduced by about 30 percent compared with the investment of the technology of the two dams with three ponds, and the cost for treating the tail water of the fish pond with 1000 mu is less than 350 ten thousand yuan.
(5) The method can adapt to the change of pollution load and water quantity, can cope with the increase of tail water pollutant concentration by 1.3 times compared with the daily average value under the condition of ensuring the standard discharge, can increase the tail water quantity by 2 times compared with the daily average water quantity, and can increase the water coping quantity by 5 times to cope with the impact requirement of large water discharge of a concentrated dry pond if only ensuring the tail water pollutant removal by more than 80 percent.
It should be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (8)
1. An aquaculture tail water treatment system comprising:
the tail water ditch is used for collecting tail water discharged from the fishpond;
the microporous filter is arranged in the tail water ditch and is used for physically intercepting tail water in the tail water ditch to remove impurities and fish feces and sterilize;
the water collecting tank is used for receiving the tail water output by the tail water ditch and uniformly mixing the water body;
a microorganism storage tank for storing a microorganism preparation, which is arranged adjacent to the primary sedimentation tank and used for conveying the microorganism preparation to the primary sedimentation tank, wherein the microorganism preparation is mixed with tail water and then sedimented;
the first-stage sedimentation tank is used for receiving the water body output by the water collecting tank and performing physical sedimentation, wherein the first-stage sedimentation tank is arranged in a strip shape, and the number of the first-stage sedimentation tanks is two;
the hydrolysis acidification tank is used for receiving the supernatant output by the primary sedimentation tank, decomposing macromolecular organic substances into micromolecular organic substances through the action of bacteria and enzymes, and decomposing the micromolecular organic substances into simple organic substances and gases by anaerobic microorganisms;
the aeration tank is used for receiving the water body output by the hydrolysis acidification tank;
the suspended ball biological stuffing box is in a rectangular solid shape and is suspended at the center of the aeration tank, wherein the suspended ball biological stuffing box comprises a box body, a buoyancy element and a suspended biological stuffing layer, the outer wall of the box body is composed of a stainless steel screen, the biological stuffing layer is arranged at the bottom of a containing cavity of the box body, the buoyancy element is arranged at the top wall of the box body, the suspended biological stuffing layer is composed of a spherical plastic shell, ceramsite and soft stuffing are filled in the plastic shell, and a plurality of fine holes are formed in the plastic shell at intervals;
the low-power large-flow submersible pumps are arranged in the top edge of the suspended ball biological stuffing box at intervals and are used for pumping water bodies in the accommodating cavity of the suspended ball biological stuffing box into the aeration tank, an input port of the low-power large-flow submersible pump is connected with a water inlet flower basket head through a hose, and the water inlet flower basket head is arranged at the center of the biological stuffing layer, so that water of the low-power large-flow submersible pump is sucked from the center of the biological stuffing layer;
the negative ion devices are arranged in the suspended ball biological stuffing box and are used for generating ion gas and conveying the ion gas to the low-power high-flow submersible pump so as to dissolve the ion gas generated by the negative ion devices into water and enable charges generated by the water to adhere to pollutant precipitation, so that microorganisms are activated and the biochemical rate is improved;
the magnetic devices are arranged in the suspended ball biological stuffing box and are used for enabling a water body to enter a high-strength magnetic cutting channel for magnetization so as to form magnetic water and conveying the magnetic water for the low-power high-flow submersible pump;
the small molecular water generators are arranged in the suspended ball biological stuffing box and are used for generating small molecular water with strong permeability and conveying the small molecular water for the low-power large-flow submersible pump so as to increase the residence time of microbubbles by a plurality of times;
the plurality of nanomachines are arranged in the suspension ball biological stuffing box and are used for generating micro-nano gas for the low-power high-flow submersible pump;
the second-stage sedimentation tank is used for receiving the water body output by the aeration tank;
the filtering dam is arranged between the secondary sedimentation tank and the output port of the aeration tank, and is provided with a nano material for decomposing organic matters in the water body flowing from the aeration tank to the secondary sedimentation tank and removing heavy metals;
the sulfur autotrophic filler filter tank is used for receiving the water body output by the secondary sedimentation tank and performing sulfur autotrophic denitrification treatment;
the clean water tank is used for receiving the water body output by the sulfur autotrophic filler filter tank and discharging the water body back to the fish pond after judging that the water body reaches the standard;
the low-power high-flow submersible pumps are arranged under the water surface of the suspended ball biological stuffing box at intervals, the water outlet directions of the low-power high-flow submersible pumps are different, and the water outlet directions of the low-power high-flow submersible pumps push and spray water according to clockwise or anticlockwise fan blades, so that the water area formed by the water outlet flows in a rotating and circulating mode.
2. The aquaculture tail water treatment system according to claim 1 wherein the input port of each of said low power high flow submersible pumps is provided with a plurality of input tubes connected to said anion apparatus, said magnetic apparatus, said small molecule water generator and said nanomachines, respectively.
3. The aquaculture tail water treatment system of claim 2 further comprising:
the first sludge concentration tank is arranged between the two primary sedimentation tanks and is used for obtaining sludge of the two primary sedimentation tanks;
the first filter press is used for carrying out filter pressing on the sludge in the first sludge concentration tank, so that the sludge after filter pressing is stored on a mud airing field and is dried to be used as fertilizer;
the material room is arranged between the two first-stage sedimentation tanks and is used for storing goods.
4. The aquaculture tail water treatment system of claim 3 further comprising:
the fan room is arranged on the bank of the aeration tank and is used for storing an air suspension variable-frequency fan and standby equipment;
the second sludge concentration tank is arranged between the primary sedimentation tank and the secondary sedimentation tank and is used for obtaining sludge in the primary sedimentation tank and the secondary sedimentation tank;
the second filter press is used for carrying out filter pressing on the sludge in the second sludge concentration tank, so that the sludge after filter pressing is stored on a mud airing field and is dried to be used as fertilizer;
and the mud airing field is arranged between the primary sedimentation tank and the secondary sedimentation tank and is adjacent to the second mud concentration tank and is used for acquiring the filter-pressed mud output by the first filter press and the second filter press and taking the filter-pressed mud as fertilizer after air blast airing.
5. The aquaculture tail water treatment system according to claim 4 further comprising:
the disinfection pond is used for disinfecting and discharging tail water which is required to be discharged after treatment, wherein the disinfection pond comprises a plurality of ascending flow pipelines which are vertically arranged, and each ascending flow pipeline is internally provided with an ultraviolet lamp tube which is strip-shaped and used for disinfecting water flowing through the flow pipeline.
6. The aquaculture tail water treatment system according to claim 5 wherein the bottoms of said primary and secondary settling tanks are provided with a grade and a sludge collection pipe is provided at the bottom and connected to a sludge pump for extracting sludge from the bottoms of said primary and secondary settling tanks by said sludge pump.
7. The aquaculture tail water treatment system according to claim 6 further comprising:
and the reflux pump is used for refluxing the supernatant of the secondary sedimentation tank to the primary sedimentation tank and/or the hydrolytic acidification tank with more than 20% of water so as to improve the biochemical rate.
8. The aquaculture tail water treatment system according to claim 7 wherein said sulfur autotrophic filler filter tank employs pyrite as a filter filler to effect total nitrogen removal by sulfur autotrophic denitrification techniques.
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| CN111718073A (en) * | 2020-06-30 | 2020-09-29 | 中国水产科学研究院淡水渔业研究中心 | Freshwater aquaculture pond tail water treatment system |
| CN112209573A (en) * | 2020-10-16 | 2021-01-12 | 北京美斯顿科技开发有限公司 | Breeding tail water treatment system |
| US20230382778A1 (en) * | 2021-10-19 | 2023-11-30 | Tianjin Research Institute For Water Transport Engineering,M.O.T. | Efficient nitrogen and phosphorus removal process system for mariculture tail water treatment |
| CN114532283A (en) * | 2022-03-25 | 2022-05-27 | 江苏海洋大学 | Murui cod shed pool matched graded culture pool and culture feeding method thereof |
| CN219136573U (en) * | 2022-11-10 | 2023-06-06 | 中国船舶集团有限公司第七一一研究所 | Breed tail water processing system |
| CN116553780A (en) * | 2023-06-05 | 2023-08-08 | 中科和盛(广东)农业产业发展有限公司 | Aquaculture tail water treatment system |
| CN117164176A (en) * | 2023-11-02 | 2023-12-05 | 广东科清环境技术有限公司 | Method for treating mariculture tail water |
| CN117383761A (en) * | 2023-11-24 | 2024-01-12 | 中科和盛(广东)农业产业发展有限公司 | Multifunctional water environment ecological restoration device |
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