54results about How to "To achieve the purpose of purifying water quality" patented technology

The composite water-purifying wetland system for northern low temperature region consists of three serially connected subsystems, including one stabilizing pond subsystem, one undercurrent wetland subsystem and one water draining pond subsystem. The stabilizing pond subsystem has one flexible partitioning wall to separate the pond into one front reservoir and one purifying area, and planted emergent vegetation zones and submerged plant zones. The undercurrent wetland subsystem consists of sand filtering modules, wetland modules and aerating water-distributing wells. The water draining pond subsystem consists of water draining canals and serially connected biological ponds. The present invention has well combined engineering measures and ecological measures to purifying polluted water for several times, saving in investment, high water purifying effect and high economic and ecological benefits.

The present invention provides an electrocatalytic separation membrane water treatment device, which comprises a shell body and a separation membrane that divides the inner space of the shell body into two parts, wherein, one part is a concentrated liquid space and the other part is a permeation liquid space; the concentrated liquid space comprises a raw water inlet and a concentrated liquid outlet that are arranged on the shell body; the permeation liquid space comprises a permeation liquid outlet arranged on the shell body. The invention is characterized in that a mesh conductive body is arranged inside the concentrated liquid space, at a position facing the separation membrane; the separation membrane and the mesh conductive body are respectively connected with constant current source to form an electron emission zone and an electron reception area; under the effect of the electric field of the constant current source, electron swarm make skip metastasis from the electron emission zone to the electron reception area; while in the metastasis process, OH, O, and H2O2 are produced to form strong oxidation source to decompose the organic matter concentration in the water. The device can be used to provide low-cost operational treatment for organic wastewater, micro-polluted drinking water, reclaimed water reuse, mine water, oil extraction wastewater, swimming pool circulating water and aquaculture circulating water, so as to play a positive role in environmental protection.

The invention provides a method for producing porous filtering ceramic used for water treatment, which comprises the steps of proportioning, mixing slurry with foam, mould loading and high temperature sintering. The die arrangement used by the method can be prepared from common plastics, thus lowering the cost of die arrangement.

The invention discloses a micro-aeration enhanced ecological floating bed sewage treatment device which comprises water plants, a floating carrier, a combined packing layer, a fine bubble aeration pipeline, a support and an aeration machine, wherein plant holes are formed in the floating carrier, the water plants are planted onto the floating carrier through the planting holes and float on the water surface inside the micro-aeration enhanced ecological floating bed sewage treatment device, the combined packing layer is arranged below the floating carrier, the fine bubble aeration pipeline is circularly laid at the bottom of the micro-aeration enhanced ecological floating bed sewage treatment device through the support, and the aeration machine is connected with the fine bubble aeration pipeline at the bottom of the device. Aeration for the device is performed through a micro-aeration system, so that the growth of microbes on plant roots and the combined packing layer is promoted, the synergistic effect of a microbial system and a water plant system is promoted, the device can be used repeatedly, pollution to water cannot be caused, the cost is low, and the device is very suitable for being applied in a large area during natural water body pollution treatment.

The invention belongs to the field of engineering bacteria, relates to a sewage treatment method, and concretely relates to a mixed microbial agent for degrading proteins and fats in sewage, and a preparation method and an application thereof. The mixed microbial agent contains Bacillus psychrophilus, Candida lipolytica, Candida parapsilosis, Bacillus amyloliquefaciens and Pseudomonas putida, wherein a living microbial quantity ratio of the Bacillus amyloliquefaciens to the Bacillus psychrophilus to the Pseudomonas putida to the Candida lipolytica to the Candida parapsilosis of 2:2:2:(2-4.5):(2-4.5). The preparation method of the mixed microbial agent includes the following steps: activation of strains, enrichment culture of the strains, simultaneous growth of the strains, and mixing of the strains. The mixed microbial agent can be used to degrade the proteins and the fats in the sewage in order to purify water.

The invention discloses a novel magnetic separation sewage treatment unit, which comprises a tank, wherein a water inlet and a water outlet are arranged at the two ends of the tank; the tank is formed by jointing tank channels; the tank is divided into a regulating and stirring tank, a partition board flocculation tank, a magnetic separation settling tank and a smoothing settling tank, wherein the regulating and stirring tank is provided with a medicament feeding system and a stirrer; an inclined plate is arranged on the bottom of the partition board flocculation tank; a funnel is arranged below the magnetic separation settling tank; and a round magnetic cylinder and a rectangular magnetic cylinder are arranged above the funnel. The device can solve the problems of high investment and low efficiency of a single water treatment technique of sewage treatment plants, can remove impurities from sewage quickly and ensures stable effluent and simple hydraulic conditions.

The invention discloses nitrobacter winogradsky and nitrobacteria-denitrifying bacteria complex microbial inoculants, a production method and application. Nitrobacter winogradsky is deposited at the China Center for Type Culture Collection with the accession number of ((i) Nitrobacter Winogradsky i ( / i)) Y3-2, CCTCC NO: M2014203. The nitrobacter winogradsky has a function of effectively treating nitrite, and is mixed with nitrosomonas europaea and pseudomonas stutzeri to obtain the complex microbial inoculants, and the complex microbial inoculants can efficiently remove nitrogen in water, and can be used for treating aquaculture water, livestock breeding sewage or industrial sewage.

The invention belongs to the field of scale inhibitor materials and discloses a controllable slow-release polyphosphate scale inhibitor and a preparation method thereof. The preparation method includes the steps of uniformly mixing calcium oxide, concentrated phosphoric acid, silicon dioxide and aluminum oxide, enabling the raw materials to react with one another at 80-100 DEG C for 1-2 hours, raising the temperature to 1,300-1,600 DEG C for a high-temperature fusion polymerization reaction for 2-4 hours, pouring obtained reactants into a mold for molding, and conducting annealing and coolingto obtain slow-release polyphosphate; grinding the obtained slow-release polyphosphate into powder and then adding an adhesive for extrusion granulation to obtain the controllable slow-release polyphosphate scale inhibitor. The controllable slow-release polyphosphate scale inhibitor has the advantages of good scale inhibition effect, long effective period, low cost and the like. Moreover, the related preparation method is easy to operate, and the scale inhibitor is suitable for scale inhibition in the fields of drinking water treatment, industrial water treatment and the like and has an important practical application value.

The invention provides a method for deep denitrification and dephosphorization of sewage. The method comprises that (1) effluent after pretreatment flows into an ozone oxidation pool, and is treated,wherein the ozone oxidation pool comprises an ozone oxidant, and difficultly-biodegraded organic matters are oxidized into easily-degraded organic matters in the ozone oxidation pool; (2) the effluentof the ozone oxidation pool flows into a biological active carbon filtering pool, wherein the biological active carbon filtering pool comprises active carbon and a biofilm attached to the surface ofthe active carbon; and (3) the effluent obtained by the treatment in the biological active carbon filtering pool flows into an autotrophic denitrification filtering pool, and the effluent obtained bythe treatment in the autotrophic denitrification filtering pool is discharged, wherein the filler in the autotrophic denitrification filtering pool contains dolomite and elemental sulfur. According tothe present invention, with the method, based on the pre-treatment, nitrogen and phosphorus in sewage can be efficiently removed, and the COD content can be reduced.

The invention discloses an automatic washing type industrial wastewater purification device which comprises a body, wherein the body comprises water inlets, a water outlet, a frequency conversion motor, a purifying chamber and guide pipes, wherein the symmetrically arranged water inlets are formed in the top end position of the body; a support frame is arranged inside the body; the frequency conversion motor is arranged on the support frame; the output part of the frequency conversion motor is connected with an inner cylinder arranged inside a center cylinder; two guide plates are slantly arranged between the upper part of the center cylinder and the inner wall of the body; current plates are arranged between the lower part of the center cylinder and the body; a fine sand layer is arranged inside the body; a filtering layer is arranged below the fine sand layer; a sampling hole is formed in the lower part of the body; a sampling valve is arranged at the sampling hole; a water outlet valve is arranged at the water outlet; the guide pipes arranged at the bottom of the body extend along the outer wall of the body, and are connected with back washing pipes arranged on the inner wall of the body; a buffer layer is arranged on the inner wall of the body. The automatic washing type industrial wastewater purification device has the advantages of reasonable structural design, high purification efficiency, good decontamination effect and the like.

The invention discloses integrated sewage purifying treatment equipment with a backwashing function. The integrated sewage purifying treatment equipment comprises a first purifying device, a second purifying device and a water pump, a water inlet pipe is fixedly arranged at the bottom of the left end of the first purifying device, and a reverse osmosis membrane filter screen and a plastic particle filter screen are installed and distributed in the first purifying device; a suction pump is arranged at the top of the first purifying device, a vertical pipe frame is connected to the bottom of the suction pump, adsorption plates are fixedly distributed at the two ends of the vertical pipe frame, a vibration device is arranged at the right end of the top of the first purifying device, and a water pumping pipe is connected to the upper end of the right side of the first purifying device through a connecting port; and the middle of the water pumping pipe is connected with a filter cylinder, and the bottom of the water pumping pipe is connected with the second purifying device through the water pump. The integrated sewage purifying treatment equipment relates to the technical field of sewage purifying, effectively removes dissolved salts, colloids, microorganisms, organic matters and the like in sewage so as to achieve the purpose of purifying water quality, directly adsorbs metal impurity particles in water, and is suitable for sewage purifying treatment.

The invention provides a method for improving water quality by using plant-microbe coupled ecological floating islands. The method is characterized in that self purification capacity of a water ecosystem is promoted by constructing a plant-microbe coupled bio-community. The method comprises the following steps: an ecological enclosure is arranged along a river channel coast, so that the exchange rate between coastal water body and an open water area is reduced; a composite ecological floating island is arranged, and aquatic plants are planted on a floating bed; elastic three-dimensional filleris suspended under and around the floating bed; and an immobilized compound water purification agent is added to the root of the aquatic plants. According to the method, the repairing effect is obvious, the maintenance is convenient, and secondary pollution to water body is not caused during the treatment process; and the method is especially suitable for water body treatment of water flowing river channels with cement revetment.

The invention discloses a method and a facility for simulating ecological clean of eutrophic river water. The method is mainly to simulate a natural ecological cleaning system, use microorganism, phytoplankton and aquatic animals to perform three-level purification, and use a nature simulating ecological cleaning facility for dividing an eutrophic water body into three-layer purification, meanwhile a biotransformation effect of an environmental-friendly ferment is combined to decompose, absorb and utilize organic matters in the eutrophic water body, and finally the purpose of purifying water quality is achieved. The facility provided by the invention can be built close to the eutrophic river water; by using the method provided by the invention, water circularly flows back to a river after flowing into the system facility, and the purpose of purifying the water quality is achieved without affecting the actual flowing speed of the river water; the method provided by the invention is simple and easy to operate and implement, and can be popularized and applied to the field of rivers and lakes currently polluted by nitrogen and phosphorus organic matters.

The present invention discloses a method for controlling bacterial diseases by co-culturing Siganus ConcatenaluJ and Penaeus japonicus. The method comprises the following steps: putting young shrimps of Penaeus japonicus with a full length of 0.8-1.0 cm, wherein the putting density is 70,000-80,000 shrimps / mu; and when the lengths of the Penaeus japonicus are 2-3 cm, putting Siganus ConcatenaluJ with the length of 2-3 cm, wherein the putting amount is 500-600 fish / mu. According to the method for controlling bacterial diseases by co-culturing Siganus ConcatenaluJ and Penaeus japonicus, the Penaeus japonicus with herbivorous property can eat baits, faeces, plankton and Enteromorpha, so that the contamination of the water of a pond and the bottom of the pond is reduced, the environment of the aquaculture pond is improved, the content of harmful bacteria in the pool water and sludge is lowered, and the occurrence and spread of bacterial diseases in culturing of the Penaeus japonicus are controlled. By co-culturing the Siganus ConcatenaluJ and the Penaeus japonicus, the excessive nutrition on the bottom of the pond and in the water of the pond can be eliminated timely, the bacteria number is reduced, the breakout of the bacterial diseases is prevented and the culturing success rate is improved.

The invention discloses an underwater illumination regulating and control device which is used for being distributed in a water area needing light. The underwater illumination regulating and control device comprises a light path device capable of floating on the water surface, a light-transmitting area is arranged on the main part of the light path device, the light path device is a concave lens or a light transmitting body with the optical property equal to that of the concave lens, the light collecting face of the light path device is upward, and the light diffusion face of the light path device is downward, so that the light path device projects light to blocked areas below and around the underwater illumination regulating and control device. The underwater light projecting range of the underwater illumination regulating and control device can be widened to dead corner areas, the needed arrangement area and number are greatly reduced, the growing space of floating plants cannot be occupied a lot, then the water purifying effect is guaranteed, manufacturing cost and use cost are relatively low, and the underwater illumination regulating and control device is suitable for being applied and popularized within in a large range.

The invention discloses a fish tank with a filtering device. The fish tank with the filtering device comprises a fish tank, wherein the fish tank bottom is a first baffle with filtering holes; a filtering tank is disposed under the first baffle; a first V-shaped groove and a second V-shaped groove are formed in two opposite side walls of the filtering tank; a first baffle and a second baffle are disposed vertically inside the filtering tank; the filtering tank is successively divided by the first baffle and the second baffle into a first filtering groove, a water-gas distribution groove and a second filtering groove; the first filtering groove is located under the first V-shaped groove; the second filtering groove is located under the second V-shaped groove; bottoms of the first filtering groove and the second filtering groove communicate with the bottom of the water-gas distribution groove; a water backflow pipe is disposed on the bottom of the filtering tank; a water outlet end of the water backflow pipe communicates with the fish tank; a water pump is disposed on the water backflow pipe; and a sewage pipeline is disposed on the bottom of the filtering tank. According to the invention, use is convenient; and silt, iron rust, suspended solids, algae, bacteria, inorganic matters and other pollutants in water are disposed by a sterilization lamp and a filtering pool at the same time, so that water quality purification can be achieved.

The invention relates to a modified adsorbing material for treating wastewater. The modified adsorbing material is prepared from the following components: 50-60 parts of modified polystyrene resin, 3-6 parts of biological flora, 0.5-1 part of flora protective agent, 10-15 parts of flocculating agent and 20-30 parts of inorganic filler. The modified polystyrene resin designed by the invention has the characteristic of large specific surface area of macroporous resin, and has relatively strong adsorption capacity, and meanwhile, the polymer trunk is degradable and is easy to hydrolyze into small molecules in a water body, so that secondary pollution to the environment caused by macromolecular polymer residues is avoided; biological florae are added based on the modified macroporous adsorption resin, the purpose of purifying water is achieved by using a small amount of biological florae, and meanwhile due to the small amount, eutrophication of the water body cannot be caused; other additives are matched for use, so that pollutants in the aquatic wastewater can be better treated, the improvement of the water environment is promoted, and the natural balance of the water environment is realized.

The invention discloses a waste water nitrogen and phosphorus removal apparatus and a waste water treatment method, which belongs to the field of sewage treatment. The waste water nitrogen and phosphorus removal apparatus comprises a denitrification column filled with sawdust and a phosphorus filtering column filled with acidic mine drainage residues. The sawdust denitrification column is coupledwith the acidic drainage residue phosphorus filter columns, the heterotrophism-autrophism denitrification nitrogen removal technology and biology-chemical phosphorus removal technology are integrated,the nitrogen and phosphorus removal treatment is performed for the point-source breeding waste water comprising nitrogen and phosphorus and scattered agricultural floor tile discharged water, and a purpose of efficiently purifying the water can be achieved. The waste water nitrogen and phposphorus removal apparatus has the advantages of simple structure, reasonable design, small floor occupationarea, low material cost and significant purification effect.

The invention discloses a treatment technology of mother liquor of iron oxide red. The treatment technology comprises the following six steps: preprocessing by flocculation and depositing, pre-oxidizing, adjusting acid, performing low-pressure reverse osmosis, performing high-pressure reverse osmosis and performing MVR concentration evaporation. The technology is low in energy consumption, high inresource utilization rate, high in wastewater treatment efficiency, complete to treat, and free from secondary pollution; in addition, a complete closed-ring system is formed in the whole technology;the wastewater is recycled and is not drained.

The invention relates to a system device for treating sewage in an A / O vertical flow constructed wetland, which is characterized in that the system device comprises a pretreatment desilting basin and a multilevel vertical flow constructed wetland; an outlet of the pretreatment desilting basin is connected with an inlet of the multilevel flow constructed wetland; two neighboring levels of the multilevel flow constructed wetland are communicated; the first processing unit of each level is a hypoxia unit; the rest processing units belong to aerobic 'wet / dry' alternating running-state processing units; the last aerobic 'wet / dry' alternating running-state processing unit of each level is communicated with the oxygen-poor processing unit of which the last aerobic 'wet / dry' alternating running-state processing unit is arranged.The constructed wetland system can strengthen nitrogen and phosphorus removal capacity of water and has high efficiency, fast phosphorus removal speed, small covering area, strong resistance to shock load and long service life of the wetland.

The invention relates to a cyclone air flotation apparatus, and belongs to the field of water treatments. The cyclone air flotation apparatus comprises a vertical cylinder, wherein one side of the cylinder is provided with a water inlet, a gas inlet and a reflux port, the bottom end of the tapered bottom of the cylinder is provided with a residue discharge port and an emptying port in a parallel manner, the other cylinder side close to the bottom is provided with a water outlet, the position close to the top end is provided with an overflow port, a center cylinder is arranged in the center of the cylinder and is divided into an upper chamber, a middle chamber and a lower chamber, the upper chamber is a residue collection tank, an upper chamber pipeline is connected with the residue discharge port, a micro gas bubble generator is arranged inside the middle chamber, the periphery of the middle chamber is distributed with a plurality of branch pipelines, the end portions of the branch pipelines are provided with injectors, the lower chamber is a water collection tank, and the residue discharge port on the bottom and the overflow port on the upper portion are normally opened during running. According to the present invention, after entering the air flotation cylinder, water requiring a treatment performs a cyclone movement on the water inlet horizontal level in the cylinder by using the hydrodynamic force so as to make the light phase suspension granules continuously agglomerate to the center, and rapidly move upward and flow into the residue collection tank under the effect of elevation buoyancy of micro gas bubbles injected by the injectors distributed on the periphery of the built-in micro gas bubble generator so as to achieve water purification and pollutant collection and treatment.

The invention relates to filter paper for a water purifier. The filter paper is prepared from, by weight, 46-50% of activated carbon, 42-43% of hardwood pulp, 9-9.8% of polyester fibers, 1-1.8% of glass fibers, 0.04-0.12% of cationic polyacrylamide, 0.1-0.3% of alkyl ketene dimer, 0.5-0.9% of polyamide epichlorohydrin and 8-10% of acrylate resin. The filter paper is a filter material with a porous network structure, which is prepared by taking plant fibers and glass fibers as carriers and adding activated carbon powder, chemical fibers and functional aids into paper pulp, and has good interception, adsorption and filtration effects on residual chlorine and organic impurities in water. On the basis that the filtering performance of the filter paper is guaranteed, the water filtering speed of paper sheets is increased, and the filter paper has high economic popularization value.

The invention discloses an activated sludge biomembrane composite sewage treatment device, which comprises a stirrer, a biological carrier component and a biological carrier bracket. The stirrer is asubmersible stirrer, and the stirrer is arranged at the bottom of a sewage tank. the biological carrier component is fixed on the biological carrier bracket at an interval of 150 mm-220 mm. The biological carrier bracket is arranged in the sewage tank. The top of the biological carrier bracket is 1.0 m-1.4 m away from the top of the sewage tank, and the bottom of the biological carrier bracket is0.6 m-1.0 m away from the bottom of the sewage tank. Under the action of the stirrer, on the one hand, the activated sludge is suspended in the sewage, and on the other hand, the activated sludge canbe filled into gaps of the biological carrier to form a biomembrane by layer-by-layer covering, so that the biomembrane and the suspended activated sludge coexist in the sewage, and the impact load resistance and the pollutant degradation capability of the device are greatly improved.

The invention provides a method for repairing an organic substance polluted water body by using typha minima. The method comprises the following steps of: 1) manufacturing a porous artificial floating island, and planting typha minima on the artificial floating island; 2) fixing the artificial floating island on which the typha minima is planted in a water area, wherein 10 to 30 percent of the water area is covered by the floating island; 3) during the growing season, after the typha minima grows for 48 to 58 days, harvesting the parts above roots; 4) after harvesting the parts above the roots, harvesting newly-grown plant parts before the rotting of plants. By adopting the method, an emergent aquatic plant namely the typha minima is planted in the polluted water body, and harmful organic substances in the water body are absorbed, so that the aim of purifying water is fulfilled. The method is simple and feasible, low in cost and easy to popularize, and is an effective method for controlling the organic substance polluted water body.

The invention relates to a special reactor used for concentrating and removing nitrogen and phosphorous in a river or lake water phase. The reactor comprises four basic units, including a through-carved thin layer bracket, a flotation system, a plant setting system and a filling system. The four units are made up of (made of) physical materials and advanced plants, wherein, the through-carved thin layer bracket is made up of polypropylene or polyethylene plastic materials; the flotation system is made of spring steels, polypropylene and other plastic materials; the plant setting system consists of polystyrene foam materials and aquatic advanced plants or terraneous advanced plants; and the filling system consists of zeolite and limestone and polypropylene or polyethylene plastic materials. The reactor of the invention is designed to aim at the current situation that the nitrogen content and the phosphorous content in the most water phases are definitely high in spite of the forms of the pollution to the river or lake water phase. The reactor of the invention has the advantages that the reactor can overcome the defects existing in the technique of the same kind, improve the removal efficiency on the nitrogen and the phosphorous, be applicable to the river waters or the lake waters with the pollution in different levels and provide habitat conditions for the large multiplication of microorganisms to quicken the degradation of organic pollutants in the water phase.

The invention discloses an oxygen pump with a filtering function. The oxygen pump comprises a device plate arranged on the upper side wall of a fish tank, a clamping groove matched with the side wallof the fish tank is arranged at the lower end of the device body, two connection rods are fixedly connected at the lower end of the device body, the lower ends of the connection rods are jointly connected with a fixing ring fixedly, bubble stone is mounted in the fixing ring, an air incoming tube of the bubble stone extends to the outside of the fish tank along the connection rods and is connectedwith an oxygen pump generator, a filtering mechanism is jointly arranged between opposite side walls of the connection rods and positioned right above the bubble stone, and position of the filteringmechanism is close to that of water surface. The oxygen pump is reasonable in structure, capable of providing oxygen while filtering water and ingenious in design.

Bionic water grass and its water quality reinforcement cleaning method relates to micro pollution source water treatment technology, which applies to resource-field water quality reinforcement cleaning technology to eutrophication lakes and micro pollution channels, etc. In Bionic weeds, the floating ball (1) and ecological fish reef (5) was connected flexibly with nylon cord (4),which make them sway with flow by 360degree, nylon cord coat has plastic pipes which can prevent Bionic weeds twisting together; there are many discs (2) which concatenate to nylon cord between the floating ball (1) and ecological fish reef (5) individually. The water quality reinforcement cleaning method of bionic water grass is: bionic water grass was released directly to eutrophication or micro pollution water mass, release denseness based on pollution degree of the lakes and channels, the average volume about 20%; The top of bionic water grass use floating ball to float on the water surface, the bottom fixed to ecological fish reef (5) to prevent its dispersion, the length of nylon cord (4) a little longer than the stage height.

The invention provides a novel feed capable of improving the breeding density of aristichthys nobilis and a preparation method of the novel feed, and belongs to the field of fish feeds for aquaculture. The feed consists of the following components in parts by weight: 10-20 parts of a biological fermentation feed, 35-45 parts of fish meal, 20-30 parts of bone meal, 25-35 parts of dry trash fish, 30-40 parts of fly larva powder, 5-10 parts of leech powder, 20-30 parts of flour, 45-55 parts of soybean meal (CP46%), 100-200 parts of rapeseed meal, 50-100 parts of cottonseed meal, 4-6 parts of soybean phospholipid oil, 4-6 parts of fish oil, 4-6 parts of choline chloride (60%), 4-6 parts of calcium dihydrogen phosphate, 2-4 parts of lysine (70%), 1-3 parts of methionine, 4.5-8.5 parts of composite multiple minerals, 2-3 parts of compound vitamin, 1-3 parts of table salt and 4-6 parts of an antioxidant, wherein strains of the biological fermentation feed comprise clostridium butyricum, saccharomyces cerevisiae, lactobacillus plantarum and bifidobacterium lactis. According to the novel feed disclosed by the invention, the intestinal health of the aristichthys nobilis can be strengthened,the digestion, absorption and utilization rate of nutrients of the feed can be increased, and the novel feed has the effect of promoting the intercropping status of the aristichthys nobilis, promotingthe aristichthys nobilis to be used as fish which is separately fed, improving the breeding density of the aristichthys nobilis and producing the aristichthys nobilis in a large scale; and besides, the water quality can also be improved, and the novel feed has important significance for sustainable development of green aquaculture.

The invention discloses an underwater illumination regulating and control device which is used for being distributed in a water area needing light. The underwater illumination regulating and control device comprises a light path device capable of floating on the water surface, a light-transmitting area is arranged on the main part of the light path device, the light path device is a concave lens or a light transmitting body with the optical property equal to that of the concave lens, the light collecting face of the light path device is upward, and the light diffusion face of the light path device is downward, so that the light path device projects light to blocked areas below and around the underwater illumination regulating and control device. The underwater light projecting range of the underwater illumination regulating and control device can be widened to dead corner areas, the needed arrangement area and number are greatly reduced, the growing space of floating plants cannot be occupied a lot, then the water purifying effect is guaranteed, manufacturing cost and use cost are relatively low, and the underwater illumination regulating and control device is suitable for being applied and popularized within in a large range.