CN111498939B - In-situ repairing filler, device and method for fishpond culture water body - Google Patents

Abstract

The invention discloses an in-situ repair filler for a fish pond culture water body, which is granular and is characterized in that the filler is obtained by mixing at least two of the following four filler particles, wherein the four filler particles comprise carbon-removing polyurethane porous biological filler particles, nitrogen-removing polyurethane porous biological filler particles, phosphorus-removing polyurethane porous biological filler particles and special polyurethane porous biological filler particles. The invention also discloses an in-situ restoration device and method for the fishpond culture water body by adopting the filler. The invention is specially designed for the water body of the fish pond, can better realize the treatment and the restoration of the eutrophication of the water body of the fish pond, can realize the oxygenation of the water body and the purification of water quality, has good purification effect and good persistence, and can better solve the problem of the eutrophication of the water body of the fish pond.

Description

In-situ repairing filler, device and method for fishpond culture water body

Technical Field

The invention belongs to the technical field of in-situ restoration and treatment of water bodies, and particularly relates to an in-situ restoration filler for a fish pond culture water body, a device and a method.

Background

In recent years, with the progress of social science and technology and the improvement of living standard of people's materials, the pollution of water bodies such as rivers, oceans and the like is more serious, and the eutrophication phenomenon gradually begins to appear in the water bodies in the creeks of many rural rivers. In order to better solve the pollution control problem of rivers and streams, China starts to implement a river length system in recent years, and management and protection responsibility of each river stream is put into practice. So as to better enhance the water resource protection, enhance the water pollution control and the water environment treatment, and realize the clean and beautiful river and lake environment and the clean water table.

The root of the eutrophication phenomenon of the water bodies of the small rivers and creeks in the rural areas is the discharge of domestic sewage in the rural areas, and the eutrophication of the water bodies of the culture in the rural areas. In the prior fish pond for rural fish culture, fishermen usually adopt an aerator to aerate the water body of the fish pond so as to increase the quantity of fish put in the fish pond. After an aerator is generally adopted, the per mu yield of the fishpond can be greatly improved. However, after the number of fish in a unit water body is increased, the number of fish feed residues, fish excrement and the like in the water body is increased, and the water body circulation purification capability of the fish pond is poor, so that the rapid eutrophication of the water body of the fish pond is caused. After the water body in the fish pond is eutrophicated, the water body in the fish pond is discharged to creeks due to overflow of rainfall, discharge during pond cleaning and the like, so that the eutrophication of creeks is caused.

In order to radically solve the problem of eutrophication of water bodies in fish ponds, a mode of forbidding mounting an aerator in the fish ponds is adopted in part of areas, and the eutrophication phenomenon is reduced by forcibly reducing the fish culture quantity in the fish ponds. However, the mode belongs to the treatment of symptoms and root causes, so that the yield of the fishpond is reduced, the production enthusiasm of fishermen can be directly reduced, and the development of the aquaculture industry is not facilitated; the oxygen content of the water body of the fish pond is reduced, so that the fish is easy to get ill, the health and growth of the fish are not facilitated, the fish production quality is reduced, and the consumption requirements of people cannot be met; the reduction of the oxygen content of the water is more unfavorable for the self-circulation purification of the water.

The existing water treatment technologies are many, but the existing water treatment technologies are generally industrial sewage treatment or domestic sewage treatment, if the existing water treatment technologies are applied to fishponds, the input cost of fishermen can be greatly increased, and the applicability is poor. Therefore, if the water treatment function of the oxygen increasing machine is added, the oxygen increasing machine has the water treatment effect while maintaining the oxygen increasing effect, and the problem of eutrophication of the water body in the fishpond can be solved with lower cost.

CN 201410089888.0 discloses a high-efficiency aerator, which comprises a housing, an aeration system arranged in the housing, and a filler layer; the bottom of the shell is provided with at least one water inlet a, the top of the shell is provided with at least one water outlet, and the aeration system is a gas transmission pipeline b arranged at the lower part of the shell and an aeration device b connected with the gas transmission pipeline b. The aerator is provided with the aeration system and the filler layer in the shell simultaneously, so that the aerator has the aeration effect and the water quality purification effect. However, in the patent, the water body purification is realized by only simply relying on a common filler layer, and the water body purification effect is poor.

Therefore, how to arrange the aeration device for the fishpond, the special filler thereof and the water body purification and restoration method, which can realize aeration and purification and have excellent water body purification and restoration effects, can solve the problem of eutrophication of the water body of the fishpond, and becomes a technical problem to be further considered and solved by technical personnel in the field.

Disclosure of Invention

Aiming at the defects of the prior art, the technical problems to be solved by the invention are as follows: how to provide the in-situ remediation filler and the device and the method for the fish pond culture water body, which can better realize the treatment and remediation of the eutrophication of the water body of the fish pond, so that the filler can not only oxygenate the water body, but also realize the purification of water quality, has good purification effect, and can better solve the problem of the eutrophication of the water body of the fish pond.

In order to solve the technical problems, the invention adopts the following technical scheme:

the filler is granular and is characterized in that the filler is obtained by mixing at least two of the following four filler particles, wherein the four filler particles comprise carbon-removing polyurethane porous biological filler particles, nitrogen-removing polyurethane porous biological filler particles, phosphorus-removing polyurethane porous biological filler particles and special polyurethane porous biological filler particles; the formula of the carbon-removing polyurethane porous biological filler particle contains hydrophilic effective components, the formula of the nitrogen-removing polyurethane porous biological filler particle contains a nitrogen adsorbent (preferably a zeolite molecular sieve) as a nitrogen-removing effective component, the formula of the phosphorus-removing polyurethane porous biological filler particle contains a phosphorus precipitator (the phosphorus precipitator includes but is not limited to calcium carbonate, polyaluminium chloride and polyferric sulfate) as a phosphorus-removing effective component, and the formula of the special polyurethane porous biological filler particle contains internal electrolysis raw materials (preferably active carbon and iron powder) as degradation effective components.

Therefore, the filler is used for in-situ remediation of the aquaculture water body of the fish pond, firstly, the filler is a polyurethane porous foam matrix, the porous characteristic of the filler is favorable for propagation of water treatment microorganisms, the water treatment effect is improved, and when the porous foam matrix is used for in-situ remediation of the aquaculture water body of the fish pond due to the characteristic of light and soft quality, the filler can be used in combination with an aerator of the fish pond, and a fluidized bed type water treatment mode is formed by utilizing the self power of the aerator so as to better improve the water treatment effect.

In the four fillers, the carbon-removing polyurethane porous biological filler particles can be prepared by adopting a modified hydrophilic polyurethane porous biological filler formula, so that the hydrophilic performance of the fillers can be improved on the basis of the carbon-removing effect, and the attachment and growth of microorganisms are facilitated. Nitrogen adsorbents such as nitrogen molecular sieves are added into the formula of the nitrogen-removing polyurethane porous biological filler particles, so that the adsorption effect on ammonia nitrogen can be enhanced, and the ammonia nitrogen in a water body can be selectively adsorbed by utilizing the molecular screening effect. Meanwhile, after the microorganisms are attached to the surface of the filler to form a biological film, the microorganisms in the biological film continuously utilize organic matters in sewage to continuously proliferate, the biological film is gradually thickened, an aerobic area is formed on the surface, and an anoxic or even anaerobic state is formed inside the biological film, so that nitrification and denitrification reactions are respectively generated on the surface and inside the biological film. Therefore, the nitrogen-removing polyurethane porous biological filler forms an enhanced process of physical adsorption concentration, microbial nitrification and microbial denitrification, and is more beneficial to nitrogen removal of a water body; in the formula of the phosphorus removal type polyurethane porous biological filler particles, calcium carbonate, polyaluminium chloride, polyferric sulfate and other phosphorus precipitants are added, so that the phosphorus removal effect of the filler can be enhanced. The metal high-valence ions dissolved in water by the phosphorus precipitator are combined with phosphate ions to generate more stable precipitate phase precipitate, so that the aim of removing phosphate is fulfilled. The phosphorus precipitator has the advantages of cheap and easily obtained raw materials for preparation, low requirement on preparation conditions, various and simple preparation methods, mass production and popularization. The internal electrolysis filler of zero-valent iron/active carbon is added in the special polyurethane porous biological filler particle formula, and refractory organic matters in water can be more effectively removed by means of the adsorption characteristic of the active carbon and the redox mechanism of internal electrolysis. The activated carbon is a graphite type microcrystal structure and has a large specific surface area, so that a large amount of pollutants can be adsorbed; a stable iron-carbon primary battery is formed in the internal electrolysis reaction, and the chemical bonds of the refractory organic matters are broken by the transfer of electrons, so that the biodegradability of the refractory organic matters is improved; in addition, iron with low potential is subjected to anodic dissolution so that divalent iron ions enter the solution, and due to coagulation of the iron ions, the iron ions attract particles with weak negative charges in the pollutants in an opposite manner to form stable flocs for removal. Therefore, the four filler particles are respectively arranged aiming at removing various nutrient-rich components in the water body of the fish pond, and simultaneously, the four filler particles are matched for use, so that the excellent in-situ repair effect of the water body of the fish pond can be achieved.

The carbon-removing polyurethane porous biological filler particle is prepared by adopting the following raw materials in parts by mass, wherein the raw materials comprise 450 parts of polyester triol 350-one, 10-12 parts of water, 3-5 parts of foam stabilizer, 3-5 parts of dimethylethanolamine, 130-170 parts of TDI, 10-20 parts of hydrophilic modifier polyethylene glycol, 10-20 parts of 10 polyacrylic acid and 10-20 parts of chitosan.

The optimal selection is 400 parts of polyester triol, 11 parts of water, 4 parts of foam stabilizer, 4 parts of dimethylethanolamine, 150 parts of TDI, 10 parts of polyethylene glycol, 10 parts of polyacrylic acid and 10 parts of chitosan.

Therefore, the decarbonization type hydrophilic polyurethane porous biological filler particles prepared by the formula according to the proportion have the advantages of good mechanical property, hydrophilic property and biocompatibility, low density, good elasticity and contribution to growth and reproduction of microorganisms. Polyacrylic acid and chitosan effectively improve the hydrophilic performance of the filler, and effective hydroxyl in the chitosan can also participate in polyurethane foaming reaction, so that a stable and uniform system can be formed, and foam molding is facilitated.

The nitrogen-removing polyurethane porous biological filler particles are prepared by adopting the following raw materials in parts by weight, wherein the raw materials comprise, by weight, 450 parts of polyester triol 350-.

The optimal proportion is 400 parts of polyester triol, 11 parts of water, 4 parts of foam stabilizer, 4 parts of dimethylethanolamine, 150 parts of TDI, 10 parts of polyethylene glycol, 10 parts of polyacrylic acid, 10 parts of chitosan and 60 parts of zeolite molecular sieve.

Therefore, the nitrogen-removing polyurethane porous biological filler particle is added with about 60 parts of zeolite molecular sieve on the basis of the formula of the carbon-removing polyurethane porous biological filler particle. If the proportion of the zeolite powder is too high, the zeolite powder is too heavy to deposit at the bottom of the filler, so that the filler collapses and the normal structure of the filler is influenced. Too little will result in the reduction of the adsorption effect on ammonia nitrogen and influence the nitrogen removal effect. Theoretical estimation and early-stage experimental results of the culture water body show that the 60 parts of zeolite molecular sieve can achieve a good adsorption effect and does not influence the overall performance of the filler.

As optimization, the phosphorus-removing polyurethane porous biological filler particle is prepared from the following raw materials, by mass, 450 parts of polyester triol 350-containing material, 10-12 parts of water, 3-5 parts of foam stabilizer, 3-5 parts of dimethylethanolamine, 130-170 parts of TDI, 10-20 parts of polyethylene glycol, 10-20 parts of hydrophilic modifier polyacrylic acid, 10-20 parts of chitosan, 20-30 parts of light calcium carbonate and 20-30 parts of polyaluminium chloride.

The optimal proportion is 400 portions of polyester triol, 11 portions of water, 4 portions of foam stabilizer, 4 portions of dimethylethanolamine, 150 portions of TDI, 10 portions of polyethylene glycol, 10 portions of polyacrylic acid, 10 portions of chitosan, 20 portions of light calcium carbonate and 20 portions of polyaluminium chloride.

Thus, the dephosphorization type polyurethane porous biological filler particle is added with about 20 parts of light calcium carbonate and about 20 parts of polyaluminium chloride on the basis of the formula of the decarbonization type polyurethane porous biological filler particle. The phosphorus adsorbent is high in density, raw materials are deposited at the bottom of the reactor due to excessive proportion, foaming performance of the filler is easily reduced and even collapsed, phosphorus removal effect is reduced due to insufficient proportion, and early experimental results of the culture water body show that the optimal phosphorus removal effect can be achieved under the combined action of about 20 parts of light calcium carbonate and about 20 parts of polyaluminium chloride.

The special polyurethane porous biological filler particles are prepared by adopting the following raw materials in parts by weight, wherein the raw materials comprise, by weight, 450 parts of polyester triol 350-containing material, 10-12 parts of water, 3-5 parts of foam stabilizer, 3-5 parts of dimethylethanolamine, 130-170 parts of TDI, 10-20 parts of polyethylene glycol, 10-20 parts of hydrophilic modifier polyacrylic acid, 10-20 parts of chitosan, 25-35 parts of powdered activated carbon and 25-30 parts of iron powder.

The optimal proportion is 400 parts of polyester triol, 11 parts of water, 4 parts of foam stabilizer, 4 parts of dimethylethanolamine, 150 parts of TDI, 10 parts of polyethylene glycol, 10 parts of polyacrylic acid, 10 parts of chitosan, 30 parts of activated carbon and 30 parts of iron powder. In order to ensure the reaction to be effectively carried out, the activated carbon and the iron powder are preferably selected from superfine powder raw materials, and the raw material product with the thickness less than 1200m is recommended.

Therefore, effective components of internal electrolysis are added in the formula of the special polyurethane porous biological filler particles, so that the special polyurethane porous biological filler particles can degrade organic pollutants which are difficult to degrade, such as chlorinated organic compounds, humic acid and the like in water. The redox reaction of zero-valent iron on the refractory substances, iron powder and carbon form a micro-electrolysis primary battery, the chemical bonds of the refractory organic substances are broken by the transfer of electrons, and macromolecular substances are degraded into small molecular substances which are easily utilized by microorganisms; in addition, iron with low potential is subjected to anodic dissolution so that divalent iron ions enter the solution, and due to coagulation of the iron ions, the iron ions attract particles with weak negative charges in the pollutants in an opposite manner to form stable flocs for removal. Too much iron-carbon raw material will greatly increase the raw material cost, increase the packing density and influence the structure and stability of the raw material, and too little can not achieve the reaction effect. The experimental result of the aquaculture water body shows that the best internal electrolysis reaction is achieved by 30 parts of iron powder and 30 parts of activated carbon.

The filler is obtained by mixing the carbon-removing polyurethane porous biological filler particles, the nitrogen-removing polyurethane porous biological filler particles, the phosphorus-removing polyurethane porous biological filler particles and the special polyurethane porous biological filler particles. Preferably, the mixing ratio is about 6:2:1: 1.

Through the actual research on the culture water body of the fish pond, the COD of the culture water body of the fish pond is 60-80mg/l, the total nitrogen is 1-4mg/l, and the total phosphorus is 1-2.5mg/l, so that the mixing ratio of various fillers is 6:2:1: about 1. The water quality and the water quality are matched with the water body material components to be processed respectively. Meanwhile, through laboratory water distribution simulation, under the condition of the adding mixing proportion, by using the in-situ remediation device and the method, the water quality is obviously improved, the content of various pollutants is reduced to a certain degree, and the removal rates of COD, total nitrogen and total phosphorus respectively reach 90%, 88% and 86%.

Because the microbial species in the biochemical treatment have the mutual influence of competition and mutualism, the invention respectively prepares four polyurethane foam sponges with different types and functions to adapt to different microbial growth environments. Thus avoiding the competition of the carbon-removing microorganisms and the nitrifying bacteria for dissolved oxygen; the competition of the carbon-removing microorganisms and the denitrifying bacteria for the organic carbon source is avoided; the microorganisms with short generation period compete with the phosphorus-accumulating bacteria on the sludge age; the inhibition effect of the internal electrolysis electrochemical reaction on microorganisms and the like. Therefore, the porous fillers with different types and functions are independently distinguished, so that the microorganisms aiming at treating different pollutants are prevented from competing with each other, the optimum growth environment required by different microorganisms is met, and the diversity of bacteria and the stability of a biological film are ensured.

As optimization, the size specification of the carbon-removing polyurethane porous biological filler particles is about 1.2 multiplied by 1.2cm, the size specification of the nitrogen-removing polyurethane porous biological filler particles and the phosphorus-removing polyurethane porous biological filler particles is about 1.0 multiplied by 1.0cm, and the size specification of the special polyurethane porous biological filler particles is about 0.8 multiplied by 0.8 cm.

Thus, filler particles with different properties adopt different particle sizes, because different filler particles are made aiming at different microorganisms, the components and particle sizes of different filler particles are different, and the abundance and biomass of microorganisms required by the carbon-removing filler in the microorganism population are larger, so that the slightly larger size is more suitable; the times of bacteria such as nitrifying bacteria, denitrifying bacteria, phosphorus accumulating bacteria and the like are longer, and the requirement on the size of the filler is strict; the mass transfer effect of macromolecular organic matters needs to be inspected by the special filler, and the optimal filler size is smaller. The different sizes are not only influenced by their composition and the number of microorganisms present, but also by the density of the particles and the resistance to water flow conditions. The packing material needs to be in a "fluidized" state under the drive of the aerator's water flow, so denser particles need to be smaller in volume.

In addition, different sizes of filler are more conducive to distinguishing the type of filler particles. In addition, the filler particles with different sizes can generate better flocculation effect during aeration, so that the activity of microorganisms is kept better, and the agglomeration phenomenon is avoided.

Preferably, the four filler particles have a pore specification of 15PPI, a porosity of about 92% and an overall density of 1.05-1.20.

By adopting the parameters, better biochemical water treatment effect can be achieved, and generation and separation of microbial films can be facilitated. Particularly, a large number of micro meshes are distributed on the polyurethane porous biological filler, so that the growth and attachment of microorganisms are facilitated, after the parameters are adopted by the filler, the microorganisms are adsorbed and grown on the surface and the interior of the foam filler, the growth conditions of aerobic bacteria and anaerobic bacteria can be better met on the surface and the interior of the filler, the types of water treatment bacteria are enriched, and the water treatment effect is greatly improved.

The in-situ repair device for the fishpond culture water body comprises a shell, wherein an aeration system is arranged on the shell, the aeration system can enable the shell to generate upward water flow lifting force, a filling cavity is formed in the shell, and filling materials are arranged in the filling cavity.

Thus, the filler is combined and applied to the special aerator for the fishpond. The aeration device of the oxygenation device is used as water flow power, so that water flows are aerated again through the filler, and the purification treatment of the fishpond water can be realized by utilizing the biochemical treatment effect of the filler. The filler is set for repairing the culture water body of the fish pond, eutrophic components such as nitrogen sources, phosphorus sources and the like in the water body can be efficiently absorbed and removed, and the sponge has the porous characteristic and can quickly generate a microbial film in the filler, so that the water treatment effect is improved.

Meanwhile, the sponge filler is light in weight under the control of the raw material proportion, so that after the microorganisms grow, the density of the foam sponge filler is slightly higher than that of water, and the sedimentation speed in the static water is lower than the water flow speed driven by the aeration of the traditional fishpond aerator. The filler can be better combined with a fishpond aerator for use, and the space size of the filler cavity can be controlled, so that the filler is driven to be in a fluidized state in the aeration process of the aerator, the biomass in a fluidized bed is greatly improved, the running stability of the system and the resistance capability to impact load are enhanced, and the pore diameter of the foam sponge filler is much larger than that of the activated carbon particles, so that bacteria and protozoa are facilitated to enter gaps of the foam sponge filler. When the filler is in a fluidized state, microorganisms entering the gaps of the filler are not completely in an attached growth state, but the gaps are filled with the microorganisms, and the microorganisms are continuously exchanged in an attached growth state and a suspended growth state. Because of the turbulent action of water flow generated by aeration and the mass transfer of air bubbles inside and outside the gap, microorganisms in the sewage keep better activity and avoid the occurrence of agglomeration, the quality of the effluent water is improved, and the sewage treatment efficiency is improved.

Further, the aeration device comprises an aeration motor, floats are arranged on the periphery of the aeration motor, the aeration motor is supported in the middle of the floats in a suspended mode through a motor support, an output shaft of the aeration motor is downwards arranged and provided with an aeration rotor wing, at least one part of the aeration rotor wing is located below the water surface, the shell comprises a vertically arranged packing cylinder, the packing cylinders are adjacently arranged under the output shaft of the aeration motor, a bottom plate is arranged at the bottom of the packing cylinder, a packing cavity is formed above the bottom plate, a partition plate is arranged on the upper portion of the packing cavity, water passing holes are distributed in the partition plate, water inlet holes are further distributed in the bottom plate or the peripheral wall of the packing cylinder, and the sizes of the water passing holes and the water inlet holes are smaller than the size of the packing.

Like this, adopt classic aeration equipment's structure, simple structure is ripe, conveniently sets up the installation, low cost. When the aeration rotary wing is used, water flow is sucked from the lower direction upwards through rotation and is diffused and beaten out to the periphery to realize aeration and oxygenation, then the water flow in the filling cylinder is driven to form flow from bottom to top, and biochemical filtering treatment is realized by the filling when pond water passes through the filling. When the water passing device is implemented, the partition plate can be obtained by installing a mesh on the partition plate frame, so that the water passing effect is improved.

Furthermore, an up-and-down movement control mechanism is arranged in the packing cylinder, the partition plate is connected with the up-and-down movement control mechanism, and a gap for the partition plate to move up and down is reserved between the partition plate and the inside of the packing cavity.

Like this, can adjust the height of baffle as required, and then adjust packing section of thick bamboo inner chamber size, make it can have enough space to supply inside filler to form the fluidization state under the effect of rising rivers when needs, and then cooperate the output regulation and control of aeration motor again, can control the packing better as required and change between static state and fluidization state. The static state refers to the range of the described general static state, which can press the flow of the filler by means of the partition plate, but does not mean the absolute static state of the filler, and because the polyurethane sponge filler is light in weight, the vibration can still be generated under the action of water flow after the flow is limited by the partition plate.

Preferably, the up-and-down motion control mechanism comprises a waterproof electric cylinder fixedly mounted in the middle of the filling cylinder above the partition plate, and a telescopic output shaft of the waterproof electric cylinder is downwards connected to the upper surface of the partition plate.

Therefore, the waterproof electric cylinder is controlled to drive the partition plate to move up and down, and the waterproof electric cylinder has the advantages of simple structure, reliable control, convenience in installation, stable operation and the like. Of course, the vertical movement control mechanism may be implemented by other conventional mechanisms capable of controlling the vertical movement of the member.

Furthermore, the bottom plate of the filling cylinder is in a cone shape with a downward tip, and the water inlet holes are distributed on the bottom plate.

Like this, when needing to pack the intracavity and pack when being the fluidization attitude, because the bottom plate is the awl cylindric, rivers impact the filler on it after getting into from the last water inlet of bottom plate, pack and be the fluidization attitude by dashing up more easily under dead weight and rivers impact.

Further, the clapboard is in a cone shape matched with the bottom plate.

This facilitates the ability of the diaphragm to press the charge back to rest when required.

Furthermore, the upper end of the filling cylinder is provided with a section of conical-cylinder-shaped flow guide section with the upper part expanded outwards, and the upper port of the flow guide section extends to the outer side of the aeration rotor wing.

Therefore, the flow guide section can prevent water from entering from the upper end of the filling cylinder, so that water can be conveniently guided to enter from the lower part of the filling cylinder, and the water treatment effect of the filling is ensured; secondly, can guide the rivers that the aeration rotor promoted all around can outwards the top impact in order to spill to the sky better, realize better aeration oxygenation effect.

Furthermore, a water pressure detection sensor is also arranged in the inner cavity of the filling cylinder, and the water pressure detection sensor is connected with an up-and-down motion control mechanism (a waterproof electric cylinder). Can rely on water pressure to detect the water flow pressure of packing section of thick bamboo inner chamber like this, according to the high position of the control of the detection condition up-and-down motion control mechanism adjustment baffle, realize the regulation to packing chamber space size to adjust packing intracavity rivers intensity size and supply to realize packing from the static state to the conversion between the flow attitude and judge when needs.

As optimization, the water pressure detection sensor is fixedly installed on the lower surface of the partition plate, an isolation cover is arranged outside the water pressure detection sensor, the isolation cover is fixed on the partition plate at the periphery, and the middle of the isolation cover protrudes towards the inner lower side of the partition plate to form a space for installing the water pressure detection sensor. The isolating cover is distributed with holes, and the size of the holes is smaller than that of the filler.

Therefore, the normal work of the water pressure detection sensor can be better ensured, and the damage caused by collision and friction of the fluidized filling material is avoided.

The invention also discloses an in-situ remediation method of the fishpond culture water body, which is characterized in that the in-situ remediation device of the fishpond culture water body is arranged in a fishpond, the aeration motor is started, and the aeration motor drives the aeration rotor wing to suck water flow from bottom to top and spread the water flow to the periphery to realize aeration and oxygenation of the fishpond water body; when water flows through the filler, the filler is impacted to enable the water flow to float in the filler cavity to be in a fluidized state, and when the water flows through the filler, the water is adsorbed and biochemically filtered by the filler to treat nutrient-rich components in the water, so that the water body restoration of the fishpond is realized.

Therefore, by utilizing the characteristic of light weight of the polyurethane foam filler, the aeration motor of the device is used for pressurizing and aerating, and simultaneously drives the filler to be in a fluidized state in the filler cavity, so that the biochemical filtering and purifying treatment of the water quality of the fishpond can be efficiently realized.

As the in-situ remediation method for the fishpond culture water body, a better water treatment mode is that the in-situ remediation device for the fishpond culture water body is adopted and is placed in a fishpond, and the up-and-down motion control mechanism drives the partition plate to move downwards to be in contact with the internal filler so as to keep the filler in a static state; starting an aeration motor, wherein the aeration motor drives an aeration rotor wing to suck water flow from bottom to top and spread the water flow to the periphery to realize aeration and oxygenation of the water body of the fishpond; when water flows through the filler, the water is adsorbed and biochemically filtered by the filler to treat rich nutrient components in the water, and a biofilm grows on the filler; when the biofilm grows to fill gaps between fillers and needs to be cleaned (generally, several days are needed, and the change condition of the pressure of the passing water flow can be detected by a water pressure detection sensor for judgment), the up-and-down motion control mechanism drives the partition plate to lift upwards to increase the space of the filler cavity, the power of the aeration motor is increased, so that the water flow drives filler particles to float in the filler cavity to be in a fluidized state, the biofilm on the surfaces of the filler particles is cleaned and separated by means of collision and friction and is taken out of the filler cylinder along with the water flow out of the filler cylinder and scattered around along with the water flow stirred by the aeration rotor wing, part of the scattered biofilm continuously exerts the biochemical filtering effect in the water body of the fishpond to continuously improve the water quality, and part of the biofilm is used for feeding omnivorous fishes to directly realize nutrition conversion; after the biofilm among the fillers is cleaned, the baffle plate is driven to move downwards by the up-and-down motion control mechanism to be in contact with the internal fillers so as to keep the fillers in a static state, and the treatment process is circulated.

Thus, the method is adopted to carry out in-situ remediation of the aquaculture water body of the fish pond, the filler is firstly kept in a static state, the rapid generation of the biofilm on the surface of the filler is facilitated, the generated biofilm acts on the flowing water body, the biochemical filtration effect of water treatment can be greatly improved, and the eutrophication treatment effect of the aquaculture water body of the fish pond can be greatly improved by combining the adsorption effect of the special proportioning components of the filler on the eutrophication components in the water body. Simultaneously after the biofilm grows and forms the jam in the clearance between the filler, can control again to increase the chamber space of packing, make special light filler in this scheme can be for the fluidization state by rivers impact, rely on collision and friction to clear away the biofilm on filler particle surface, make the filler resume good filtration treatment effect, the biofilm of clearing away can increase the biochemical treatment effect of water self in the pond in bringing out the pond along with rivers, improve pond water self-purification ability, partial biofilm can directly accomplish the conversion of nutritive material after being swallowed by fish as the fish grain of omnivorous fish simultaneously. Therefore, the water filtering treatment effect of the device can be better maintained for a long time, and the absorption and conversion treatment effect of the device on the water body nutrient source can be more efficiently exerted. Greatly improving the in-situ restoration capability of the fish pond water body.

Furthermore, part of solid filler particles are added into the filler cavity.

Like this, the solid filler can make the whole certain hardness that has of filler, can be suppressed into static by the baffle better, and the richness of filler classification can be favorable to the formation of different types of water treatment bacterium more simultaneously, improves water treatment effect. Simultaneously when the filler cavity space increases, a small amount of solid filler can be impacted by rivers with all the other sponge fillers and be the fluidization state, relies on the striking of solid filler can clear away the biomembrane on filler surface more high-efficient swiftly, realizes the clearance of filler. In practice, the proportion of solid filler particles is preferably 5% to 30%.

In conclusion, the invention is designed specially for the water body of the fish pond, can better realize the treatment and restoration of the eutrophication of the water body of the fish pond, can realize oxygen enrichment and water purification of the water body, has good purification effect and good persistence, and can better solve the problem of the eutrophication of the water body of the fish pond.

Drawings

Fig. 1 is a schematic structural diagram of an in-situ remediation device for a fish pond aquaculture water body according to a specific embodiment of the invention.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

The specific implementation mode is as follows: the filler is granular and is characterized in that the filler is obtained by mixing at least two of the following four filler particles, wherein the four filler particles comprise carbon-removing polyurethane porous biological filler particles, nitrogen-removing polyurethane porous biological filler particles, phosphorus-removing polyurethane porous biological filler particles and special polyurethane porous biological filler particles; the formula of the carbon-removing polyurethane porous biological filler particle contains hydrophilic effective components, the formula of the nitrogen-removing polyurethane porous biological filler particle contains a nitrogen adsorbent (preferably a zeolite molecular sieve) as a nitrogen-removing effective component, the formula of the phosphorus-removing polyurethane porous biological filler particle contains a phosphorus precipitator (the phosphorus precipitator includes but is not limited to calcium carbonate, polyaluminium chloride and polyferric sulfate) as a phosphorus-removing effective component, and the formula of the special polyurethane porous biological filler particle contains internal electrolysis raw materials (preferably active carbon and iron powder) as degradation effective components.

Therefore, the filler is used for in-situ remediation of the aquaculture water body of the fish pond, firstly, the filler is a polyurethane porous foam matrix, the porous characteristic of the filler is favorable for propagation of water treatment microorganisms, the water treatment effect is improved, and when the porous foam matrix is used for in-situ remediation of the aquaculture water body of the fish pond due to the characteristic of light and soft quality, the filler can be used in combination with an aerator of the fish pond, and a fluidized bed type water treatment mode is formed by utilizing the self power of the aerator so as to better improve the water treatment effect.

In the four fillers, the carbon-removing polyurethane porous biological filler particles can be prepared by adopting a modified hydrophilic polyurethane porous biological filler formula, so that the hydrophilic performance of the fillers can be improved on the basis of the carbon-removing effect, and the attachment and growth of microorganisms are facilitated. Nitrogen adsorbents such as nitrogen molecular sieves are added into the formula of the nitrogen-removing polyurethane porous biological filler particles, so that the adsorption effect on ammonia nitrogen can be enhanced, and the ammonia nitrogen in a water body can be selectively adsorbed by utilizing the molecular screening effect. Meanwhile, after the microorganisms are attached to the surface of the filler to form a biological film, the microorganisms in the biological film continuously utilize organic matters in sewage to continuously proliferate, the biological film is gradually thickened, an aerobic area is formed on the surface, and an anoxic or even anaerobic state is formed inside the biological film, so that nitrification and denitrification reactions are respectively generated on the surface and inside the biological film. Therefore, the nitrogen-removing polyurethane porous biological filler forms an enhanced process of physical adsorption concentration, microbial nitrification and microbial denitrification, and is more beneficial to nitrogen removal of a water body; in the formula of the phosphorus removal type polyurethane porous biological filler particles, calcium carbonate, polyaluminium chloride, polyferric sulfate and other phosphorus precipitants are added, so that the phosphorus removal effect of the filler can be enhanced. The metal high-valence ions dissolved in water by the phosphorus precipitator are combined with phosphate ions to generate more stable precipitate phase precipitate, so that the aim of removing phosphate is fulfilled. The phosphorus precipitator has the advantages of cheap and easily obtained raw materials for preparation, low requirement on preparation conditions, various and simple preparation methods, mass production and popularization. The internal electrolysis filler of zero-valent iron/active carbon is added in the special polyurethane porous biological filler particle formula, and refractory organic matters in water can be more effectively removed by means of the adsorption characteristic of the active carbon and the redox mechanism of internal electrolysis. The activated carbon is a graphite type microcrystal structure and has a large specific surface area, so that a large amount of pollutants can be adsorbed; a stable iron-carbon primary battery is formed in the internal electrolysis reaction, and the chemical bonds of the refractory organic matters are broken by the transfer of electrons, so that the biodegradability of the refractory organic matters is improved; in addition, iron with low potential is subjected to anodic dissolution so that divalent iron ions enter the solution, and due to coagulation of the iron ions, the iron ions attract particles with weak negative charges in the pollutants in an opposite manner to form stable flocs for removal. Therefore, the four filler particles are respectively arranged aiming at the removal of various nutrient-rich components in the water body of the fish pond, and have excellent in-situ remediation effect by matching the use of the filler particles.

In the embodiment, the carbon-removing polyurethane porous biological filler particle is prepared from the following raw materials, by mass, 450 parts of polyester triol 350-containing, 10-12 parts of water, 3-5 parts of foam stabilizer, 3-5 parts of dimethylethanolamine, 130-170 parts of TDI, 10-20 parts of hydrophilic modifier polyethylene glycol, 10-20 parts of 10 polyacrylic acid and 10-20 parts of chitosan.

Specifically, in the present embodiment, the following preferable specific proportions are adopted as the above-mentioned compounding ratio: 400 parts of polyester triol, 11 parts of water, 4 parts of foam homogenizing agent, 4 parts of dimethylethanolamine, 150 parts of TDI, 10 parts of polyethylene glycol, 10 parts of polyacrylic acid and 10 parts of chitosan.

Therefore, the decarbonization type hydrophilic polyurethane porous biological filler particles prepared by the formula according to the proportion have the advantages of good mechanical property, hydrophilic property and biocompatibility, low density, good elasticity and contribution to growth and reproduction of microorganisms. Polyacrylic acid and chitosan effectively improve the hydrophilic performance of the filler, and effective hydroxyl in the chitosan can also participate in polyurethane foaming reaction, so that a stable and uniform system can be formed, and foam molding is facilitated. The specific preparation method can be consistent with the preparation method of common polyurethane foam, and the foam material can be cut into particles with required sizes after being formed, and the specific process is the conventional technology and is not detailed here.

In the embodiment, the nitrogen-removing polyurethane porous biological filler particles are prepared from the following raw materials, by mass, 450 parts of polyester triol 350-containing, 10-12 parts of water, 3-5 parts of foam stabilizer, 3-5 parts of dimethylethanolamine, 130-170 parts of TDI, 10-20 parts of polyethylene glycol, 10-20 parts of hydrophilic modifier polyacrylic acid, 10-20 parts of chitosan and 50-70 parts of zeolite molecular sieve.

Specifically, in the present embodiment, the following preferable specific proportions are adopted as the above-mentioned compounding ratio: the water-soluble polyester ternary alcohol is prepared from 400 parts of polyester ternary alcohol, 11 parts of water, 4 parts of foam homogenizing agent, 4 parts of dimethylethanolamine, 150 parts of TDI, 10 parts of polyethylene glycol, 10 parts of polyacrylic acid, 10 parts of chitosan and 60 parts of zeolite molecular sieve.

Therefore, the nitrogen-removing polyurethane porous biological filler particle is added with about 60 parts of zeolite molecular sieve on the basis of the formula of the carbon-removing polyurethane porous biological filler particle. If the proportion of the zeolite powder is too high, the zeolite powder is too heavy to deposit at the bottom of the filler, so that the filler collapses and the normal structure of the filler is influenced. Too little will result in the reduction of the adsorption effect on ammonia nitrogen and influence the nitrogen removal effect. Theoretical estimation and early-stage experimental results of the culture water body show that the 60 parts of zeolite molecular sieve can achieve a good adsorption effect and does not influence the overall performance of the filler.

In the embodiment, the phosphorus-removing polyurethane porous biological filler particle is prepared from the following raw materials, by mass, 450 parts of polyester triol 350-.

Specifically, in the present embodiment, the following preferable specific proportions are adopted as the above-mentioned compounding ratio: 400 parts of polyester triol, 11 parts of water, 4 parts of foam homogenizing agent, 4 parts of dimethylethanolamine, 150 parts of TDI, 10 parts of polyethylene glycol, 10 parts of polyacrylic acid, 10 parts of chitosan, 20 parts of light calcium carbonate and 20 parts of polyaluminium chloride.

Thus, the dephosphorization type polyurethane porous biological filler particle is added with about 20 parts of light calcium carbonate and about 20 parts of polyaluminium chloride on the basis of the formula of the decarbonization type polyurethane porous biological filler particle. The phosphorus adsorbent is high in density, raw materials are deposited at the bottom of the reactor due to excessive proportion, foaming performance of the filler is easily reduced and even collapsed, phosphorus removal effect is reduced due to insufficient proportion, and early experimental results of the culture water body show that the optimal phosphorus removal effect can be achieved under the combined action of about 20 parts of light calcium carbonate and about 20 parts of polyaluminium chloride.

In the embodiment, the special polyurethane porous biological filler particles are prepared from the following raw materials, by mass, 450 parts of polyester triol 350-.

Specifically, in the present embodiment, the following preferable specific proportions are adopted as the above-mentioned compounding ratio: 400 parts of polyester triol, 11 parts of water, 4 parts of foam stabilizer, 4 parts of dimethylethanolamine, 150 parts of TDI, 10 parts of polyethylene glycol, 10 parts of polyacrylic acid, 10 parts of chitosan, 30 parts of activated carbon and 30 parts of iron powder. In order to ensure the reaction to be effectively carried out, the activated carbon and the iron powder are preferably selected from superfine powder raw materials, and the raw material product with the thickness less than 1200m is recommended.

Therefore, effective components of internal electrolysis are added in the formula of the special polyurethane porous biological filler particles, so that the special polyurethane porous biological filler particles can degrade organic pollutants which are difficult to degrade, such as chlorinated organic compounds, humic acid and the like in water. The redox reaction of zero-valent iron on the refractory substances, iron powder and carbon form a micro-electrolysis primary battery, the chemical bonds of the refractory organic substances are broken by the transfer of electrons, and macromolecular substances are degraded into small molecular substances which are easily utilized by microorganisms; in addition, iron with low potential is subjected to anodic dissolution so that divalent iron ions enter the solution, and due to coagulation of the iron ions, the iron ions attract particles with weak negative charges in the pollutants in an opposite manner to form stable flocs for removal. Too much iron-carbon raw material will greatly increase the raw material cost, increase the packing density and influence the structure and stability of the raw material, and too little can not achieve the reaction effect. The experimental result of the aquaculture water body shows that the best internal electrolysis reaction is achieved by 30 parts of iron powder and 30 parts of activated carbon.

Specifically, in this embodiment, the filler is obtained by mixing the above-mentioned carbon-removing polyurethane porous biological filler particles, nitrogen-removing polyurethane porous biological filler particles, phosphorus-removing polyurethane porous biological filler particles, and special polyurethane porous biological filler particles. The mixing ratio is about 6:2:1: 1.

Through the actual research on the culture water body of the fish pond, the COD of the culture water body of the fish pond is 60-80mg/l, the total nitrogen is 1-4mg/l, and the total phosphorus is 1-2.5mg/l, so that the mixing ratio of various fillers is 6:2:1: about 1. The water quality and the water quality are matched with the water body material components to be processed respectively. Meanwhile, through laboratory water distribution simulation, under the condition of the adding mixing proportion, by using the in-situ remediation device and the method, the water quality is obviously improved, the content of various pollutants is reduced to a certain degree, and the removal rates of COD, total nitrogen and total phosphorus respectively reach 90%, 88% and 86%.

Because the microbial species in the biochemical treatment have the mutual influence of competition and mutualism, the invention respectively prepares four polyurethane foam sponges with different types and functions to adapt to different microbial growth environments. Thus avoiding the competition of the carbon-removing microorganisms and the nitrifying bacteria for dissolved oxygen; the competition of the carbon-removing microorganisms and the denitrifying bacteria for the organic carbon source is avoided; the microorganisms with short generation period compete with the phosphorus-accumulating bacteria on the sludge age; the inhibition effect of the internal electrolysis electrochemical reaction on microorganisms and the like. Therefore, the porous fillers with different types and functions are independently distinguished, so that the microorganisms aiming at treating different pollutants are prevented from competing with each other, the optimum growth environment required by different microorganisms is met, and the diversity of bacteria and the stability of a biological film are ensured.

In this embodiment, as an optimal choice, the size specification of the carbon-removing polyurethane porous biological filler particles is about 1.2 × 1.2 × 1.2cm, the size specification of the nitrogen-removing polyurethane porous biological filler particles and the phosphorus-removing polyurethane porous biological filler particles is about 1.0 × 1.0 × 1.0cm, and the size specification of the special polyurethane porous biological filler particles is about 0.8 × 0.8 × 0.8 cm.

Thus, filler particles with different properties adopt different particle sizes, because different filler particles are made aiming at different microorganisms, the components and particle sizes of different filler particles are different, and the abundance and biomass of microorganisms required by the carbon-removing filler in the microorganism population are larger, so that the slightly larger size is more suitable; the times of bacteria such as nitrifying bacteria, denitrifying bacteria, phosphorus accumulating bacteria and the like are longer, and the requirement on the size of the filler is strict; the mass transfer effect of macromolecular organic matters needs to be inspected by the special filler, and the optimal filler size is smaller. The different sizes are not only influenced by their composition and the number of microorganisms present, but also by the density of the particles and the resistance to water flow conditions. The packing material needs to be in a "fluidized" state under the drive of the aerator's water flow, so denser particles need to be smaller in volume.

In addition, different sizes of filler are more conducive to distinguishing the type of filler particles. In addition, the filler particles with different sizes can generate better flocculation effect during aeration, so that the activity of microorganisms is kept better, and the agglomeration phenomenon is avoided.

In this embodiment, the four filler particles have a porosity of about 92% and an overall density of 1.05-1.20, and the polyurethane foam sponge has a porosity of 15 PPI.

By adopting the parameters, better biochemical water treatment effect can be achieved, and generation and separation of microbial films can be facilitated. Particularly, a large number of micro meshes are distributed on the polyurethane porous biological filler, so that the growth and attachment of microorganisms are facilitated, after the parameters are adopted by the filler, the microorganisms are adsorbed and grown on the surface and the interior of the foam filler, the growth conditions of aerobic bacteria and anaerobic bacteria can be better met on the surface and the interior of the filler, the types of water treatment bacteria are enriched, and the water treatment effect is greatly improved.

The embodiment also discloses an in-situ restoration device of the fishpond aquaculture water body by applying the filler, which is shown in figure 1 and comprises a shell, wherein an aeration system is arranged on the shell, the aeration system can generate upward water flow lifting force in the shell, a filler cavity is formed in the shell, and the filler cavity is internally provided with the filler 8.

Thus, the filler is combined and applied to the special aerator for the fishpond. The aeration device of the oxygenation device is used as water flow power, so that water flows are aerated again through the filler, and the purification treatment of the fishpond water can be realized by utilizing the biochemical treatment effect of the filler. The filler is set for repairing the culture water body of the fish pond, eutrophic components such as nitrogen sources, phosphorus sources and the like in the water body can be efficiently absorbed and removed, and the sponge has the porous characteristic and can quickly generate a microbial film in the filler, so that the water treatment effect is improved.

Meanwhile, the sponge filler is light in weight under the control of the raw material proportion, so that after the microorganisms grow, the density of the foam sponge filler is slightly higher than that of water, and the sedimentation speed in the static water is lower than the water flow speed driven by the aeration of the traditional fishpond aerator. The filler can be better combined with a fishpond aerator for use, and the space size of the filler cavity can be controlled, so that the filler is driven to be in a fluidized state in the aeration process of the aerator, the biomass in a fluidized bed is greatly improved, the running stability of the system and the resistance capability to impact load are enhanced, and the pore diameter of the foam sponge filler is much larger than that of the activated carbon particles, so that bacteria and protozoa are facilitated to enter gaps of the foam sponge filler. When the filler is in a fluidized state, microorganisms entering the gaps of the filler are not completely in an attached growth state, but the gaps are filled with the microorganisms, and the microorganisms are continuously exchanged in an attached growth state and a suspended growth state. Because of the turbulent action of water flow generated by aeration and the mass transfer of air bubbles inside and outside the gap, microorganisms in the sewage keep better activity and avoid the occurrence of agglomeration, the quality of the effluent water is improved, and the sewage treatment efficiency is improved.

Wherein, aeration equipment includes aeration motor 1, and aeration motor 1 is provided with float 2 all around, and aeration motor 1 passes through the unsettled support of motor support 3 at float 2 middle part, and aeration motor 1 output shaft sets up downwards and installs aeration rotor 4, and aeration rotor 4 has at least that the part is not in the surface of water under, the casing includes a vertical setting's a packing section of thick bamboo 5, and packing section of thick bamboo 5 is adjacent to be set up under the aeration motor output shaft, and packing section of thick bamboo 5 bottom is provided with bottom plate 6, and bottom plate 6 top forms the packing chamber, and packing chamber upper portion is provided with baffle 7, and the distribution is provided with the water punchhole on the baffle 7, and it has the inlet opening still to distribute on packing section of thick bamboo's the bottom plate 6, crosses water punchhole and inlet opening size and is less than the filler size.

Like this, adopt classic aeration equipment's structure, simple structure is ripe, conveniently sets up the installation, low cost. When the aeration rotary wing is used, water flow is sucked from the lower direction upwards through rotation and is diffused and beaten out to the periphery to realize aeration and oxygenation, then the water flow in the filling cylinder is driven to form flow from bottom to top, and biochemical filtering treatment is realized by the filling when pond water passes through the filling. When the water passing device is implemented, the partition plate can be obtained by installing a mesh on the partition plate frame, so that the water passing effect is improved.

Wherein, still be provided with up-and-down motion control mechanism in the packing section of thick bamboo, baffle 7 links to each other with up-and-down motion control mechanism, leaves the clearance that supplies baffle 7 up-and-down motion between baffle 7 and the packing intracavity portion.

Like this, can adjust the height of baffle as required, and then adjust packing section of thick bamboo inner chamber size, make it can have enough space to supply inside filler to form the fluidization state under the effect of rising rivers when needs, and then cooperate the output regulation and control of aeration motor again, can control the packing better as required and change between static state and fluidization state. The static state refers to the range of the described general static state, which can press the flow of the filler by means of the partition plate, but does not mean the absolute static state of the filler, and because the polyurethane sponge filler is light in weight, the vibration can still be generated under the action of water flow after the flow is limited by the partition plate.

The up-and-down motion control mechanism comprises a waterproof electric cylinder 9 fixedly installed in the middle of the packing cylinder above the partition plate, and a telescopic output shaft of the waterproof electric cylinder 9 is downwards connected to the upper surface of the partition plate 7.

Therefore, the waterproof electric cylinder is controlled to drive the partition plate to move up and down, and the waterproof electric cylinder has the advantages of simple structure, reliable control, convenience in installation, stable operation and the like. Of course, the vertical movement control mechanism may be implemented by other conventional mechanisms capable of controlling the vertical movement of the member.

Wherein, the bottom plate 6 of the filling cylinder is in a cone shape with a downward tip, and the water inlet holes are distributed on the bottom plate 6.

Like this, when needing to pack the intracavity and pack when being the fluidization attitude, because the bottom plate is the awl cylindric, rivers impact the filler on it after getting into from the last water inlet of bottom plate, pack and be the fluidization attitude by dashing up more easily under dead weight and rivers impact.

Wherein, the clapboard 7 is in a cone shape matched with the bottom plate 6.

This facilitates the ability of the diaphragm to press the charge back to rest when required.

Wherein, the upper end of the filling cylinder 5 is provided with a section of conical flow guide section 10 with the upper part expanded outwards, and the upper port of the flow guide section 10 extends to the outer side of the aeration rotor wing.

Therefore, the flow guide section can prevent water from entering from the upper end of the filling cylinder, so that water can be conveniently guided to enter from the lower part of the filling cylinder, and the water treatment effect of the filling is ensured; secondly, can guide the rivers that the aeration rotor promoted all around can outwards the top impact in order to spill to the sky better, realize better aeration oxygenation effect.

Wherein, a water pressure detection sensor 12 is also arranged in the inner cavity of the filling cylinder, and the water pressure detection sensor 12 is connected with an up-and-down motion control mechanism (a waterproof electric cylinder). Can rely on water pressure to detect the water flow pressure of packing section of thick bamboo inner chamber like this, according to the high position of the control of the detection condition up-and-down motion control mechanism adjustment baffle, realize the regulation to packing chamber space size to adjust packing intracavity rivers intensity size and supply to realize packing from the static state to the conversion between the flow attitude and judge when needs.

Wherein, water pressure detection sensor 12 fixed mounting is at 7 lower surfaces of baffle, and water pressure detection sensor outside is provided with cage 11, and cage 11 is fixed all around on baffle 7 and the middle part forms the space of installation water pressure detection sensor to the protrusion of baffle inside lower place. The isolating cover is distributed with holes, and the size of the holes is smaller than that of the filler.

Therefore, the normal work of the water pressure detection sensor can be better ensured, and the damage caused by collision and friction of the fluidized filling material is avoided.

The device can also be applied to an in-situ restoration method of the fishpond culture water body, and is characterized in that the in-situ restoration device of the fishpond culture water body is arranged in a fishpond, and the baffle plate is driven by the up-and-down motion control mechanism to move downwards to be in contact with the internal filler so as to keep the filler in a static state; starting an aeration motor, wherein the aeration motor drives an aeration rotor wing to suck water flow from bottom to top and spread the water flow to the periphery to realize aeration and oxygenation of the water body of the fishpond; when water flows through the filler, the water is adsorbed and biochemically filtered by the filler to treat rich nutrient components in the water, and a biofilm grows on the filler; when the biofilm grows to fill gaps between fillers and needs to be cleaned (generally, several days are needed, and the change condition of the pressure of the passing water flow can be detected by a water pressure detection sensor for judgment), the up-and-down motion control mechanism drives the partition plate to lift upwards to increase the space of the filler cavity, the power of the aeration motor is increased, so that the water flow drives filler particles to float in the filler cavity to be in a fluidized state, the biofilm on the surfaces of the filler particles is cleaned and separated by means of collision and friction and is taken out of the filler cylinder along with the water flow out of the filler cylinder and scattered around along with the water flow stirred by the aeration rotor wing, part of the scattered biofilm continuously exerts the biochemical filtering effect in the water body of the fishpond to continuously improve the water quality, and part of the biofilm is used for feeding omnivorous fishes to directly realize nutrition conversion; after the biofilm among the fillers is cleaned, the baffle plate is driven to move downwards by the up-and-down motion control mechanism to be in contact with the internal fillers so as to keep the fillers in a static state, and the treatment process is circulated.

Thus, the method is adopted to carry out in-situ remediation of the aquaculture water body of the fish pond, the filler is firstly kept in a static state, the rapid generation of the biofilm on the surface of the filler is facilitated, the generated biofilm acts on the flowing water body, the biochemical filtration effect of water treatment can be greatly improved, and the eutrophication treatment effect of the aquaculture water body of the fish pond can be greatly improved by combining the adsorption effect of the special proportioning components of the filler on the eutrophication components in the water body. Simultaneously after the biofilm grows and forms the jam in the clearance between the filler, can control again to increase the chamber space of packing, make special light filler in this scheme can be for the fluidization state by rivers impact, rely on collision and friction to clear away the biofilm on filler particle surface, make the filler resume good filtration treatment effect, the biofilm of clearing away can increase the biochemical treatment effect of water self in the pond in bringing out the pond along with rivers, improve pond water self-purification ability, partial biofilm can directly accomplish the conversion of nutritive material after being swallowed by fish as the fish grain of omnivorous fish simultaneously. Therefore, the water filtering treatment effect of the device can be better maintained for a long time, and the absorption and conversion treatment effect of the device on the water body nutrient source can be more efficiently exerted. Greatly improving the in-situ restoration capability of the fish pond water body.

Wherein, part of solid filler particles are also added into the filler cavity.

Like this, the solid filler can make the whole certain hardness that has of filler, can be suppressed into static by the baffle better, and the richness of filler classification can be favorable to the formation of different types of water treatment bacterium more simultaneously, improves water treatment effect. Simultaneously when the filler cavity space increases, a small amount of solid filler can be impacted by rivers with all the other sponge fillers and be the fluidization state, relies on the striking of solid filler can clear away the biomembrane on filler surface more high-efficient swiftly, realizes the clearance of filler. In practice, the proportion of solid filler particles is preferably 5% to 30%.

In conclusion, the method can better realize the treatment and restoration of the eutrophication of the water body of the fish pond, can realize oxygen enrichment and water purification of the water body, has good purification effect and good persistence, and can better solve the problem of the eutrophication of the water body of the fish pond.

Claims (4)

1. The filler is granular and is characterized in that the filler is obtained by mixing the following four filler particles, wherein the four filler particles comprise carbon-removing polyurethane porous biological filler particles, nitrogen-removing polyurethane porous biological filler particles, phosphorus-removing polyurethane porous biological filler particles and special polyurethane porous biological filler particles; the formula of the carbon-removing polyurethane porous biological filler particle contains hydrophilic effective components, the formula of the nitrogen-removing polyurethane porous biological filler particle contains a nitrogen adsorbent as the nitrogen-removing effective component, the formula of the phosphorus-removing polyurethane porous biological filler particle contains a phosphorus precipitator as the phosphorus-removing effective component, and the formula of the special polyurethane porous biological filler particle contains an internal electrolysis raw material as the degradation effective component;

the carbon-removing polyurethane porous biological filler particle is prepared from the following raw materials, by mass, 450 parts of polyester triol 350-one, 10-12 parts of water, 3-5 parts of foam stabilizer, 3-5 parts of dimethylethanolamine, 130-170 parts of TDI, 10-20 parts of hydrophilic modifier polyethylene glycol, 10-20 parts of polyacrylic acid 10, and 10-20 parts of chitosan;

the nitrogen-removing polyurethane porous biological filler particle is prepared from the following raw materials, by mass, 450 parts of polyester triol 350-one, 10-12 parts of water, 3-5 parts of foam stabilizer, 3-5 parts of dimethylethanolamine, 130-170 parts of TDI, 10-20 parts of polyethylene glycol, 10-20 parts of hydrophilic modifier polyacrylic acid, 10-20 parts of chitosan and 50-70 parts of zeolite molecular sieve;

the phosphorus-removing polyurethane porous biological filler particle is prepared from the following raw materials, by mass, 450 parts of polyester triol 350-containing, 10-12 parts of water, 3-5 parts of foam stabilizer, 3-5 parts of dimethylethanolamine, 130-170 parts of TDI, 10-20 parts of polyethylene glycol, 10-20 parts of hydrophilic modifier polyacrylic acid, 10-20 parts of chitosan, 20-30 parts of light calcium carbonate and 20-30 parts of polyaluminium chloride;

the special polyurethane porous biological filler particles are prepared from the following raw materials, by mass, 450 parts of polyester triol 350-containing, 10-12 parts of water, 3-5 parts of foam stabilizer, 3-5 parts of dimethylethanolamine, 130-170 parts of TDI, 10-20 parts of polyethylene glycol, 10-20 parts of hydrophilic modifier polyacrylic acid, 10-20 parts of chitosan, 25-35 parts of powdered activated carbon and 25-30 parts of iron powder;

the size specification of the carbon-removing polyurethane porous biological filler particles is 1.2 multiplied by 1.2cm, the size specification of the nitrogen-removing polyurethane porous biological filler particles and the phosphorus-removing polyurethane porous biological filler particles is 1.0 multiplied by 1.0cm, and the size specification of the special polyurethane porous biological filler particles is 0.8 multiplied by 0.8 cm.

2. The in situ restoration filler for the aquaculture water body of the fish pond according to claim 1, wherein the four filler particles comprise polyurethane foam sponge with the pore specification of 15PPI, the porosity of 92 percent and the overall density of 1.05-1.20.

3. An in-situ restoration device for a fishpond culture water body, which comprises a shell, wherein an aeration system is arranged on the shell, the aeration device can generate upward water flow lifting force in the shell, a filler cavity is formed in the shell, and filler is arranged in the filler cavity, and the in-situ restoration device is characterized in that the filler comprises the in-situ restoration filler for the fishpond culture water body as claimed in any one of claims 1-2, and when the filler is static, a space for the filler to form a fluidized state under the action of aeration ascending water flow is reserved in the filler cavity;

the aeration device comprises an aeration motor, floats are arranged on the periphery of the aeration motor, the aeration motor is supported in the middle of the floats in a suspended mode through a motor support, an output shaft of the aeration motor is downwards arranged and provided with an aeration rotor wing, at least one part of the aeration rotor wing is arranged below the water surface, the shell comprises a vertically arranged filling cylinder, the filling cylinders are adjacently arranged under the output shaft of the aeration motor, a bottom plate is arranged at the bottom of the filling cylinder, a filling cavity is formed above the bottom plate, a partition plate is arranged on the upper portion of the filling cavity, water passing holes are formed in the partition plate in a distributed mode, water inlet holes are further distributed in the bottom plate or the peripheral wall of the filling cylinder, and the sizes of the water passing holes and the water inlet holes are smaller than the size of the filling materials.

4. The in-situ remediation method of the fishpond aquaculture water body is characterized in that the in-situ remediation device of the fishpond aquaculture water body as claimed in claim 3 is arranged in a fishpond, an aeration motor is started, the aeration motor drives an aeration rotor wing to suck water flow from bottom to top and spread the water flow to the periphery to realize aeration and oxygenation of the fishpond aquaculture water body; when water flows through the filler, the filler is impacted to enable the water flow to float in the filler cavity to be in a fluidized state, and when the water flows through the filler, the water is adsorbed and biochemically filtered by the filler to treat nutrient-rich components in the water, so that the water body restoration of the fishpond is realized.

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