261results about How to "Reduce ammonia nitrogen" patented technology

The invention discloses a method for processing a landfill leachate, which comprises the following steps of ammonia nitrogen removal, flocculent precipitate, electrolysis, capacitance desalination, anaerobic treatment, aerobic treatment, membrane filtration and membrane concentrate treatment. The method for processing the landfill leachate has the advantages that an electrolysis technology, a membrane technology and a bio-chemical technology are combined to form a method for processing the landfill leachate, the method has the characteristics of stable operation, strong adaptive capacity on water quality change, low cost, high treatment efficiency, effective reduction of index of ammonia nitrogen, COD, SS, chromaticity in the landfill leachate and standard discharge of effluent.

The invention relates to a method for fermentation production of a poultry bacterial agent by multi-bacteria miscible liquid, wherein aerobic bacteria, namely Bacillus subtilis, Bacillus licheniformis, bacillus natto, beer yeast, Aspergillus niger and Aspergillus oryzae are cultured in a shaking table according to different culture mediums, so as to culture a mother seed solution; simultaneously Lactobacillus acidophilus, bifidobacteria and enterococcus faecalis are subjected to anaerobic culture by utilization of Kille flasks, and a mother bacterial solution of photosynthetic bacteria is cultured by a Kille flask under the condition of illumination; the prior stock solution is inoculated into a seed tank for anaerobic culture and fermentation according to 4 percent of the inoculum concentration, and the fermentation time is between 48 and 60 hours; and the cultured seed liquid is inoculated into a productive tank for anaerobic culture and fermentation according to 10 percent of the inoculum concentration, the fermentation time is between 60 and 72 hours, and the fermentation end point is reached when the pH value is reduced to 4.0. The method has the advantages that the microscopic examination viable count of the bacterial agent is more than 5 billion per milliliter, so that the bacterial agent is safe and nontoxic, thereby not only improving the disease resistance of poultry but also promoting the quick growth of the poultry, reducing the feed-meat ratio and improving the quality of meat, eggs and milk.

Belonging to the field of environmental microorganism application, the invention discloses a Bacillus subtilis strain and application thereof. The strain is named as Bacillus subtilis CM-A12, is currently preserved in China Center For Type Culture Collection (called CCTCC for short) with a preservation number of CCTCC NO:M 2015688, and the preservation date is November 23, 2015. The Bacillus subtilis strain provided by the invention has the advantages of simple cultivation condition, high temperature resistance, acid and alkali resistance, and high salinity resistance, can secrete protease, amylase and cellulase, and can effectively improve water quality and reduce COD and ammonia nitrogen in water.

The invention provides membrane biologic reaction equipment and a processing method for processing industrial waste water with high ammoniac nitrogen. In the processing equipment, an anaerobic water outlet pool (100), an oxygen-poor pool (2), a first-section aerobian pool (3), a second-section aerobian pool (4) and a membrane pool (5) are connected according to the circulation sequence of fluid, wherein immersion type unitization hollow fibre membrane filtration equipment is arranged in the membrane pool for carrying out solid and liquid separation of processing liquid. The equipment adopts a control mode combining manual control and automatic control, and the operation and the maintenance are simple. A biochemical system has a flexible running mode with adjustable oxygen-poor and aerobian time, adjustable dirt return quantity, adjustable return modes, and the like so as to adapt to the change condition of the produced waste water and ensure high processing efficiency.

The invention discloses a system and a method for softening treatment of desulfurization wastewater of a coal-fired power plant. A primary reaction tank, a primary clarification tank, a secondary reaction tank and a secondary clarification tank are arranged, lime milk, sodium sulfate, polymeric ferric sulfate and polyacrylamide are added to the primary reaction tank for a primary reaction and clarified through the primary clarification tank, Mg(OH)2 and CaSO4*2H2O in the wastewater after the primary reaction are removed, the mixture has a secondary reaction in the secondary reaction tank, smoke is fed into the secondary reaction tank and is settled in the secondary clarification tank, CaCO3 is settled, and softening treatment of the desulfurization wastewater of the coal-fired power plant is completed. The system is simple in structure and easy to implement and facilitates industrial production; when the softening treatment effect is met, that is, the content of Mg<2+> is smaller than or equal to 5 mg / L and the content of Ca<2+> is smaller than or equal to 5 mg / L, the adding amount of chemical is reduced, and the chemical operation cost is reduced, so that the operation cost of a zero discharging system for the desulfurization wastewater of the coal-fired power plant is reduced, and the system has important economic benefits and environmental benefits.

The invention discloses a centralization indoor constant temperature circulation aquaculture system which includes two aquaculture ponds arranged side by side. A water inlet and a water outlet are arranged in each aquaculture pond. An aerator and a swell machine are arranged in each aquaculture pond. The centralization indoor constant temperature circulation aquaculture system is characterized in that the two aquaculture ponds are made of thermal insulation materials. A sewage treatment system is arranged between the two aquaculture ponds. A suction sewage device is arranged at the end of water outputting of each aquaculture pond. The suction sewage device is connected with the sewage treatment system through a sewage pipe. A water outlet of the sewage treatment system communicates with each aquaculture pond. The centralization indoor constant temperature circulation aquaculture system has the advantage that circulation utilization of water for aquaculture is achieved so that the quality of aquaculture aquatic products is improved and pollution of sewage discharges to environment is reduced.

The invention discloses a livestock and poultry breeding wastewater treating technology and belongs to the technical field of treatment of livestock and poultry breeding waste. The method comprises the following steps of gravity sedimentation pretreatment, flocculation treatment, special ultrafiltration treatment, nanofiltration treatment, reverse osmosis treatment and aeration biological filter treatment. The membrane technology is used as the core, and a whole set of complete-process technology, which has the good separation and removal effect on organic matter, nitrogen, phosphorus and the like in livestock and poultry breeding wastewater, makes the processed waste water reach the pollution discharge standards in livestock and poultry breeding industry, and is wide in application range and suitable for livestock and poultry breeding wastewater zero discharge of various feces removal, is provided, wherein effluent can be recycled for washing hog houses, pig farm landscape water and toilets and the like.

The invention discloses a coking wastewater comprehensive treatment method comprising the following steps of: pre-treatment, biochemical treatment and deep treatment. The deep treatment step comprises sequential steps of filtering, ultra-filtering, carrying out resin adsorption, re-filtering, and carrying out reverse osmosis. With the adoption of a coking wastewater comprehensive treatment system of the coking wastewater comprehensive treatment method, the pre-treatment step adopts a de-oiling pond, an adjusting pond and an air floating pond, which are connected in sequence; the biochemical treatment step adopts a primary aeration pond, a primary settling pond, an oxygen-poor pond, an aerobic pond and a secondary settling pond, which are connected in sequence; and the deep treatment step adopts a multi-medium filter, an ultra-filtering device, a resin adsorption column and a reverse osmosis device. The coking wastewater comprehensive treatment method has the beneficial effects that the method is stable to operate and has a simple process and good treating effects.

The invention relates to a water purifying agent for pond culture. The water purifying agent is powdery mixture which is prepared by uniformly mixing the following components in part by weight: 100 to 200 parts of bacillus subtilis, 100 to 200 parts of nitrobacteria, 150 to 200 parts of photosynthetic bacteria and 400 to 650 parts of zeolite powder, wherein the water purifying agent preferably comprises 100 parts of bacillus subtilis, 100 parts of nitrobacteria, 150 parts of photosynthetic bacteria and 650 parts of zeolite powder; the bacillus subtilis is light yellow powder and the total count of viable bacteria is more than or equal to 200 hundred million per one gram; the nitrobacteria is light grey powder and the total count of the viable bacteria is more than or equal to 80 hundred million per one gram; the photosynthetic bacteria is grey white powder and the total count of the viable bacteria is more than or equal to 30 to 50 hundred million per one gram; and the zeolite powder is clinoptilolite with particle size of 180 meshes. The water purifying agent has the advantages of improving water quality, conducting the function of oxidation, ammoniation, denitrification, dephosphorization, sulfurization, nitrogen fixation and the like, constructing and maintaining good ecological water environment, preventing and treating diseases, enhancing the anti-disease capacity of animals bred in the pond and improving the survival rate. The water purifying agent has a reasonable formula, is simple to prepare and has obvious application effect.

The invention discloses a device for strengthening anaerobic ammonia oxidation and nitrogen removal process. The device comprises a raw-water storage tank, a feed pump, a biochemical reactor and a continuous flow reactor of a sediment tank; the continuous flow reactor is connected with a PLC (programmable logic controller); the biochemical reactor contains an anaerobic zone, an aerobic zone and an anoxic zone; the urban raw-material storage tank is communicated with a water inlet pipe of the biochemical reactor through the feed pump, and sewage is sequentially connected with the anaerobic zone, the aerobic zone, the anoxic zone and the sediment tank through the water inlet pipe; the sediment tank is subjected to sludge and water separation, and a supernatant is discharged as yielding water; in the anaerobic zone, activated sludge absorbs an organic matter synthesized internal carbon source degraded into the water; in the aerobic zone, coupling of short-cut nitrogen removal and anaerobic ammonium oxidation is realized by controlling dissolved oxygen, and nitrogen removal rate of the system is increased.

The invention discloses a water treatment method for recycling bath sewage using biological active carbon which comprises the steps of, (1) coagulating sedimentation and filtering, (2) entering immobilization biologically active charcoal reactor, (3) membrane filtering, (4) UV sterilization, wherein the immobilization biologically active charcoal reactor is provided with activated charcoal fixed by engineering bacterium, which is selected from anionic surface active agent degradation bacterium and / or degraded COD bacterium and / or nitrated bacterium.

The invention relates to a technique for integrated two-stage strengthened air-flotation separation of dense algae slurry. The technique comprises that: collected dense algae slurry first enters a first-stage air-flotation tank where algae and high-density micro-bubbles have contact with and adhere to each other so as to separate algae and water and remove about 50 to 80 percent of algae, and then water enters a second-stage strengthening air-flotation tank, is added with an appropriate amount of flocculant, and then is subjected to air-flotation treatment again so as to remove the remaining algae and other suspended substances in the water. The invention not only applies to the disposal of dense algae slurry, but also can be used to treat algae-rich water low in algae content. The invention has the advantages of effectively removing blue-green algae in water, transferring nitrogen, phosphorus and other nutrient loads in water, purifying water, preventing the explosion of blue-green algae and providing an effective method and a device for controlling the pollution of lakes and reservoirs.

The invention provides a microbiological agent for aquaculture, which is prepared from the following constituents: bacillus subtilis 35-40%, photosynthetic bacterium 15-20%, nitrated bacterium 10-15%, lactic acid bacteria 0.1-1%, zeolite powder 24-39%, the preparation has the functions of oxidization, ammonization, anti-nitrification, de-phosphor, sulfidization and nitrogen fixation.

The invention discloses composite bacteria for treating food waste percolate and a preparation method thereof, and the preparation method comprises the following steps: respectively performing high-density culture on strains of trichoderma viride, bacillus subtilis, bread mold, photosynthetic bacteria, saccharomyces cerevisiae, bacillus licheniformis, nitrosomonas europaea and nitrobacterwinogradskyi, performing dehydration and drying on various types of monoxenie obtained by high-density culture to prepare hypopus microbial dry powder, and then mixing according to the weight ratio of 5-15 parts of the trichoderma viride, 10-15 parts of the bacillus subtilis, 20-30 parts of the bread mold, 10-15 parts of the photosynthetic bacteria, 7-15 parts of the saccharomyces cerevisiae, 10-15 parts of the bacillus licheniformis, 10-20 parts of the nitrosomonas europaea and the 10-20 parts of the nitrobacterwinogradskyi to prepare the composite bacteria for treating the food waste percolate. By using the composite bacteria for treating the waste percolate, the use is convenient, the effects of fermentation and degradation are good and the production cost is low.

The invention relates to a method for preparing a water quality modifying microecological preparation for reducing ammonia nitrogen and nitrite nitrogen, and belongs to the technical field of aquiculture technology and ecological environmental protection. The microecological is prepared by the following steps: mixing Bacillus foecalis alkaligenes CGMCC NO.1.1786 and arthrobacterium CGMCC NO.1282 into mixed bacteria; performing fermentation on the mixed bacteria for 24 to 36 hours in a culture medium in a fermenter at the fermentation temperature of between 28 and 32 DEG C; processing the obtained product into a liquid preparation through filling or continuous dilution or concentration after fermentation culture; and preparing the water quality modifying microecological preparation with the functions of reducing the ammonia nitrogen and the nitrite nitrogen in a water body. The preparation is convenient to use, is slightly influenced by environmental conditions, has small dosage, can obviously reduce the content of the ammonia nitrogen and the nitrite nitrogen in a pool water body after use, maintains the effect for 10 to 15 days, can effectively prevent diseases and paroxysmal death of aquaculture organisms and improve the yield and the quality of the aquaculture organisms when simultaneously improving the environmental quality of the pool water quality and the survival conditions of the aquaculture organisms.

The invention provides a novel eucommia feed additive and a production method thereof. The production method comprises the steps of adding water into dried eucommia leaves, performing extraction under 50-60 DEG C for 4-6 hours, and pumping leach liquor into a storage tank; then adding water for secondary leaching, and combining the leach liquor; adding a natural clarifying agent into the leach liquor, stirring for 30 minutes, and stewing for one night for precipitation; extracting supernate into a vacuum concentrator, separating lower suspension through a tubular centrifugal machine, combining filtrate and supernate, performing vacuum concentration under 60 DEG C, and controlling the baume degree of a concentrated solution to be 28-32; atomizing the concentrated solution under the temperature of 170-180 DEG C to instantly dry the particles to form the novel eucommia feed additive. Contents of effective components such as chlorogenic acid, eucommia ulmoides oliv polysaccharides and eucommia ulmoides flavonoids in the novel eucommia feed additive are high; the quality is stable; the novel eucommia feed additive is suitable for healthy breeding for animals such as pigs, livestock, fish and shrimps and has the effects of replacing antibiotic, enhancing the anti-disease immunity of the livestock, reducing the breeding periodic death rate, increasing the feed conversion rate, improving the meat quality, promoting animal growth, reducing ammonia-nitrogen output amount and the like.

The invention discloses a sewage physicochemical treatment method and a device. The method has the concrete steps that: (1) the PH value of the sewage is measured; (2) when the PH value of the sewage exceeds the range of 5 to 8, acid or alkali is added to adjust the PH value to range from 5 to 8; (3) composite reducing agent is added to the sewage of the step (2) for reaction; (4) composite flocculant is added to the sewage of the step (3) for reaction; (5) composite oxidant is added to the sewage of the step (4) for reaction; (6)coagulant aid is added to the sewage of the step (5) for reaction; (7) the sewage to which the medicines are added is processed by solid-liquid separation, and then settled sludge and floating slag are removed; and (8)finally qualified water can be taken out. The invention provides the sewage physicochemical treatment method and the device, capable of efficiently treating substances and heavy metals which are hard to be degraded by microbes in the sewage, and having the advantages of convenient operation and low running cost.

The invention relates to an aquaculture composite microbial agent, which comprises the following agents by weight: 5-10 parts of Bacillus subtilis, 0.5-4 parts of Bacillus licheniformis, 1-6 parts of bacillus megaterium, 0.2-1 part of Pseudomonas gelatinasa, 0.5-3 parts of Rhodopseudomonas capsulata, and 2-8 parts of Bdellovibrio bacteriovorus. The invention also relates to application of the aquaculture composite microbial agent in improvement of water quality and / or control of aquatic organism diseases.

The invention relates to a microbial water-purifying agent and a preparation method thereof. The microbial water-purifying agent is prepared by fermenting corncobs, sugar cane residue, wheat bran, rapeseed meal, zeolite powder, potassium dihydrogen phosphate, sodium chloride, light calcium carbonate, water and liquid strains in a fermentation bin. The preparation method of the microbial water-purifying agent comprises the following steps: firstly, crushing the corncobs into particles with diameters smaller than 5 mm; proportionally adding and mixing the sugar cane residue, the wheat bran, therapeseed meal, the zeolite powder, the potassium dihydrogen phosphate, the sodium chloride and the light calcium carbonate; adding 25 percent of water; sending the mixture to an air steamer; adding high-pressure steam to the air steamer to increase the air pressure to 1-2 MPa and the temperature to 140-200 DEG C; keeping the pressure for 4-6 minutes; momentarily releasing the mixture in the air steamer; sending the mixture to the fermentation bin so that the temperature falls to 30-37 DEG C; then, inoculating 3-5 percent of strains; fermenting in the fermentation bin for 72 hours; and discharging from the bin to obtain a finished product. The product has good water-purifying effect, and air-steamed stalks are culture media for strain growth as well as excellent vectors. The invention can prepare strains by strains, stimulate the mass propagation of microorganisms to form dominant strains and have the yield-improving efficiency.

The invention discloses a biological enzyme treating agent of industrial sewage. The biological enzyme treating agent is characterized by comprising, by weight, 10 parts to 18 parts of oxidation-reduction enzymes, 10 parts to 15 parts of cellulose, 5 parts to 8 parts of protease, 5 parts to 8 parts of laccase, 6 parts to 8 parts of methanogenesis brevibacterium, 6 parts to 8 parts of nitrococcus, 0.5 parts to 1.5 parts of bamboo juice, and the balance water. According to the biological agents conduct disposing on sewage of printing and dyeing mills and similar industries through a biological catalysis technology which has a biological degradation function, foul smell can be dispelled greatly so as to degrade liquid pollutants rapidly and reduce the size of solid substances, polluted substances can be purified rapidly, treatment effect is good, operating cost of sewage treatment can be reduced greatly, the purified water is stable in water quality, the biological enzyme treating agent of the industrial sewage is energy-saving, efficient and capable of treating pollution, and has notable economical benefits and environmental benefits.

The invention provides a microecological preparation for purifying water quality in litopenaeus vannamei culture and preparation and application thereof, and relates to aquaculture. The microecological preparation for purifying water quality in litopenaeus vannamei culture contains at least one kind of materials from bacillus subtilis, bacillus pumilus and at least one kind of materials from lactobacillus plantarum and lactobacillus acidophilus; the microecological preparation for purifying water quality in litopenaeus vannamei culture comprises veterinary medicine, feed additives or water quality purification agents and the like. The preparation applied to the litopenaeus vannamei culture is concretely a preparation prepared from bacillus subtilis, bacillus pumilus, lactobacillus plantarum and lactobacillus acidophilus, and is applied in aspects of promoting litopenaeus vannamei growth, improving the immunity and the disease resistant capability, improving the litopenaeus vannamei culture survival rate, simultaneously reducing the ammonia nitrogen in the culture water body and purifying the culture water quality.

The invention belongs to multiple-stage treatment methods of waste water and treatment systems thereof, and particularly discloses treatment methods of landfill leachate and treatment systems thereof. One of the treatment methods comprises the following steps of: firstly, mixing the landfill leachate and anaerobic sludge to perform complete reaction; secondly, performing electrochemical reaction to obtain flocs and initially depositing effluent water; finally, adjusting the pH value, adding Fenton reagents and mixing the effluent water and aerobic sludge after the complete reaction between the Fenton reagents and the leachate in a later phase. In the other method of the invention, the mixing and reaction between the leachate in the initial phase and the aerobic sludge are performed before the electrochemical reaction and other steps are the same. The invention also provides two different treatment systems for the two different treatment methods. The systems are formed by optimally combining a pre-treatment tank, an anaerobi reaction tank, an electrochemical reaction tank, a deposition tank, an oxidation tank, a regulating tank, a biochemical reaction tank and a sludge concentration tank. The treatment methods have the advantages of wide application range, small influence of environment, low operation cost, good treatment effect and the like.

The invention provides a recirculated cooling water system which comprises a collecting basin, a water pump, a heat exchanger and a cooling tower which are distributed along the flow direction of recirculated cooling water, as well as a biological aerated filter arranged behind a by-pass filter or a biological aerated filter arranged on a by-pass leaded out from the collecting basin. The recirculated cooling water system provided by the invention is adopted to purify the recirculated cooling water, thus the problem of quality deterioration of the recirculated cooling water caused by serious or slight material leakage, sewage recycling carried out on the recirculated cooling water and other reasons can be prevented and treated, and along with the extension of the operational time, the water quality can be gradually and thoroughly purified, and the direct sewage disposal of the recirculated water meets the requirement of the state environmental regulation that the CODcr is less than 60mg / L. The method of the invention has the advantages of low equipment investment and operational cost, small occupied area, no chemical agent consumption and higher practicability and economical efficiency.

The invention is concerned with a microorganism feedstuff additive to promote the growth of eels, especially to improve the compound function to liver. Culture one or some of the selected lichen bacillus, plant lactobacillus, lactobacillus casei and beer yeast. Carry domesticationhe and train the multiple bacteria and zymosis with culture medium and asepsis water, dry quickly with low temperature through drying mechine, add special carrier, crush and sift out to get production. It has the greatest amout of live bacterium and active metabolized produce, and the production has microorganism with high concentration and abundant active metabolized stuff. Those bacteria and metabolized stuff can improve the intestines function of eels to speed the composing of bile and special protein divided form liver. It also improves the water for living and it is a kind of zoology agriculture production.

The invention discloses a resource utilization and regeneration circulation utilization device for livestock and poultry breeding wastewater. The device comprises an anaerobic tank, a grid tank, an adjusting tank, an ammonia-nitrogen removing device, a biological aerated filter (BAF), a disinfecting tank, a sludge tank, a sludge filter press and a gas collecting device, wherein the ammonia-nitrogen removing device can be in one of the modes of struvite precipitation method ammonia-nitrogen removal and blow-off method ammonia-nitrogen removal. The device is based on the combination of an anaerobic technique, a denitrification technique, a BAF technique and a disinfection technique, the livestock and poultry breeding wastewater is used as the resource and is subjected to anaerobic fermentation treatment to generate biogas, the wastewater is further subjected to solid-liquid separation after the biogas is generated, the solid residue is used as the raw material for producing an organic fertilizer to produce the organic fertilizer, the wastewater is subjected to BAF technique and disinfection and is subsequently recycled and discharged by being up to standard, the treatment effect is good, the energy consumption is low, the resource is comprehensively utilized, and economical benefits are achieved.

The invention provides a microecologic preparation for inhibiting vibrio in litopenaeus vannamei culture as well as preparation and application, and relates to aquaculture. The microecologic preparation comprises at least one of bacillus safensis and bacillus pumilus, and at least one of lactobacillus plantarum and lactobacillus plantarum; when the microecologic preparation is in a form of microbial bacteria solution, the preparation method comprises the following step: mixing a bacillus safensis fermented solution, a bacillus pumilus fermented solution, a lactobacillus plantarum fermented solution and a lactobacillus plantarum fermented solution; at least one of vitamin C, fructo-oligosaccharide, mannitol, and the like is added as a protecting agent to the mixture. The microecologic preparation is applicable to the preparation of preparations for promoting the growing of litopenaeus vannamei, improving the immunity and disease resistance of the litopenaeus vannamei, preventing and controlling the diseases of the litopenaeus vannamei, increasing the survival rate, purifying culture water quality, and particularly preventing and controlling intestinal tract thickening, red-leg disease, eye-rot disease and white spot syndrome virus of the litopenaeus vannamei. The microecologic preparation is applicable to preparation of veterinary drugs, feed additives or water purifiers, and the like.

The invention discloses a novel livestock wastewater treatment process. According to the novel process, after being subjected to solid-liquid separation through a pretreatment system, livestock wastewater sequentially enters an efficient anaerobic treatment system, an MBR, an ultrafiltration system and a nanofiltration system to be treated, then effluent flowing out of the nanofiltration system enters a microalgae cultivation system for microalgae cultivation, and effluent flowing out of the microalgae cultivation system can meet discharge standards and is discharged. Through the novel livestock wastewater treatment process, ammonia nitrogen, phosphorus and COD in wastewater can be effectively removed to improve the effluent quality, and meanwhile, by-products with economic values such as biogas, humic acid and microalgae are obtained.

The invention provides a nano-catalysis, electrolysis, flocculation and air-floatation device. A coagulative precipitation tank, a primary air-floatation tank, an electrolytic air-floatation tank and a slag-discharging tank are arranged in a housing of the device, wherein the top of the coagulative precipitation tank is provided with a water inlet and a mixer; the bottom of the coagulative precipitation tank is communicated with the primary air-floatation tank; a side sewage-draining outlet is connected with a sewage-draining pipe; a dissolved gas release pipe is arranged at the edge of the primary air-floatation tank; the sewage-draining outlet is connected with the sewage-draining pipe; the upper portion of the inner side of the primary air-floatation tank is communicated with the electrolytic air-floatation tank; the electrolytic air-floatation tank is divided into an upper layer and a lower layer by an upper-lower separator plate; a slag-scraping device is arranged in an upper gas-liquid separation chamber; an electrolytic cell is mounted between the upper layer and the lower layer of the electrolytic air-floatation tank; the bottom of the electrolytic cell is fixed on the inner bottom of the casing; the top of the electrolytic cell is open and horizontal with the top of the upper-lower separator plate; an electrode is installed in the electrolytic cell; and an interval between an anode and a cathode of the electrode serves as a water passage. The device integrates multiple functions of electrolysis, flocculation precipitation, air-floatation and the like together, has high automation degree, sewage-discharging efficiency and low running cost, and is convenient for operation and maintenance.

The invention provides a formula of floc nutrients for cultivating bio-flocs and beneficial bacteria as well as a preparation and an application. The formula is characterized in that the formula comprises the following components in percentage by weight: 20-40% of puffed corn flour, 5-10% of rice husk powder, 5-10% of humic acid, 40-60% of molasses powder and 10-20% of beneficial bacteria powder; wherein the beneficial bacteria is 1x10<8>-1x10<10> cell / g, and comprises Bacillus cereus, Bacillus licheniformis, Bacillus subtilis, Lactobacillus, and Lactobacillus acidophilus. The floc nutrients are widely applied to water bodies for cultivating prawns, sea cucumbers and fishes, so that formation of bio-flocs in the water bodies is accelerated, ammonia nitrogen and nitrous nitrogen and other harmful substances are rapidly reduced, and directed breeding of beneficial bacteria in the water bodies are improved. The floc nutrients are green and environmentally friendly, and have the advantages of substantially improved production benefits and reduced production cost, wide market prospects, usage convenience; only water is needed for dilution of the floc nutrients, and the diluted floc nutrients are sprayed into cultivation water once a day.

The invention discloses a water quality purifying method for a riverway. The problems of an existing purifying method that technical requirements are high, construction is complex, investment is enormous are solved. The water quality purifying method for the riverway is low in technical requirements and little in investment. The water quality purifying method for the riverway comprises the following steps that water in the riverway is guided into a settling pond, and the guided water precipitates in the settling pond; supernatant in the settling pond is fetched out, and medicaments are added into the fetched-out supernatant; the medicament-added supernatant is placed into a reaction pond, and reactions are conducted; river water in the reaction pond is filtered; oxidizing agents are added into the filtered water; and the oxidant-added filtered water is led into an aeration pond which is provided with biological stuffing, and the oxidant-added filtered water is subjected to aeration treatment and microbiological treatment in the aeration pond. The water quality purifying method for the riverway is low in the technical requirements, little in investment and high in treating efficiency.