150results about How to "Reduce the concentration of ammonia nitrogen" patented technology

The invention discloses a health-care compound feed for prawns and a production method thereof. The invention aims to provide a health-care compound feed for prawns, which can improve immunity in the prawns, utilization rate of feed and water quality, and a production method thereof. The formula of the raw material comprises the following components in part by weigh: 1 to 6 parts of imported white fish meal, 20 to 25 parts of steamed fish meal imported from Taiwan, 2 to 8 parts of steamed fish meal made in China, 18 to 22 parts of high-gluten wheat flour, 15 to 22 parts of peeled soybean pulp, 8 to 15 parts of peanut cakes, 2 to 6 parts of defatted shrimp meal, 1 to 3 parts of beer yeast cream, 1 to 3 parts of soyabean lecithin oil, 0.5 to 2 parts of refined fish oil, 0.5 to 2 parts of monocalcium phosphate and 1 to 4 parts of additive premix. The production method comprises: crushing, primary material mixing, secondary material mixing, hardening and tempering, granulating, braising, aging, drying, cooking, sieving and packaging. The invention can improve the breeding yield of pawns, reduce discharge pollution, improve water environment and the like.

The invention discloses a refuse percolate zero discharge reclamation treatment method, and relates to the wastewater treatment technology. The invention provides a refuse percolate zero discharge reclamation treatment method. The method comprises the following steps: sending the raw liquor of the refuse percolate into a raw water regulation pond, removing the suspended solids and impurities in the outputted water through a membrane coagulation reactor, returning the outputted water to the raw water regulation tank through the back flushing of the membrane coagulation reactor, and sending the discharged wastewater into a membrane contact reactor to form a by product of an ammonium sulphate solution; sending the outputted water of the membrane contact reactor into an upwash type anaerobic bioreactor for the anaerobic biochemical treatment, and sending the outputted water of the upwash type anaerobic bioreactor into a membrane bioreactor for the aerobic biochemical treatment; sending the outputted water of the membrane bioreactor into a continuous membrane filtering system for filtration, and returning the concentrated liquor and back flushing water of the continuous membrane filtering system to the raw water regulation tank; and sending the outputted water of the continuous membrane filtering system into a reverse osmosis system, removing the concentrated liquor of the reverse osmosis system through boiler oxidation and torch firing, and obtaining the reclaimable pure water which is the outputted water of the reverse osmosis system.

A process for treating sewage by A2N denitrifying to remove P includes pumping sewage in anaerobic pool, discharging the muddy water in medium deposition pool, discharging the supernatant in aerobic biomembrane mitrifying pool and the sludge in anoxic pool, discharging the water from said nitrifying pool to anoxic pool, discharging water from anoxic pool to high-speed aerating pool for absorbing residual P, pumping water in final deposition pool, draining the treated water, and pumping part of sludge back to anaerobic pool.

The invention discloses a method for enhancing nitrogen and phosphorus removal of urban sewage by sludge fermentation, relates to the coupling control technology of sludge fermentation enhanced nitrogen and phosphorus removal technology and sludge fermentation technology, and belongs to the fields of urban sewage treatment and sludge biochemical treatment. The method employs a sequencing batch reactor to couple the sludge fermentation effect and the urban sewage nitrogen and phosphorus removal effect into a same system, so that easily degradable carbon source generated by sewage fermentation can be consumed timely by phosphorus-accumulating bacterium and denitrifying bacterium, the nitrogen removal effect of the urban sewage with a low C / N ratio is enhanced, the problem of lowered fermentation reacting rate caused by accumulation of products in the fermentation process is avoided, and the initial stabilization of primary sludge is achieved at the same time. The method for enhancing nitrogen and phosphorus removal of urban sewage by sludge fermentation is applicable to the enhanced nitrogen and phosphorus removal of the urban sewage with low C / N ratio and C / P ratio and the initial decrement and stabilization of the sludge. The method for enhancing nitrogen and phosphorus removal of urban sewage by sludge fermentation is saving in carbon source and improved in nitrogen removal efficiency, and has the advantages of simple equipment, flexible operation, high nitrogen removal efficiency and the like.

The invention discloses a treatment system and a treatment method that can realize the reuse of coking wastewater. The treatment system comprises a coagulating sedimentation tank, a photocatalytic O3 oxidation device and a filtration device; wherein the coagulating sedimentation tank is provided with a water inlet for introducing biochemical effluent and a sediment discharge port, the water outlet of the coagulating sedimentation tank is connected with the water inlet of the photocatalytic O3 oxidation device, the water outlet of the photocatalytic O3 oxidation device is connected with the water inlet of the filtration device, and the filtration device is provided with a water outlet connected with a recycled pipe. The invention can finish three stages of treatment, namely the coagulation, photocatalytic O3 oxidation and filtration of coking wastewater, and can decompose the harmful complex polymeric organic compounds in the coking wastewater into micro-molecular compounds or directly mineralize the harmful complex polymeric organic compounds by the organic combination of the coagulating sedimentation tank, the photocatalytic O3 oxidation device and the filtration device; therefore, the treatment system and the treatment method of the invention can ensure that the COD satisfies the standard of the production reuse water, further reduces the concentration of ammonia nitrogen, and has the functions of discolorization, deodorization and sterilization at the same time.

The invention relates to a system and method for controlling excrement and urine of poultries and placentae of disease-caused dead poultries in a large-scale farm. The system comprises a source separated poultry house, a solid-liquid separation system, a liquid high-temperature aerobic fermentation system, a solid fermentation system, a stink-flue gas treatment system, a circulating water system and a detection control system, wherein the source separated poultry house is a poultry house in which rainwater and sewage are separated, drinking water and sewage are separated, and fence flushing water and the excrement and urine of the poultries are separated; the solid-liquid separation system comprises a excrement collecting pool, a sludge pump and a solid-liquid separation device; the liquid high-temperature aerobic fermentation system comprises a liquid thermal-insulation fermentation reactor; the stink-flue gas treatment system comprises a stink heat exchange condenser, a flue gas heat exchange condenser, a biological deodorization filter tower, an aeration fan, an air blower and an induced draft fan; and the detection control system comprises a material temperature sensor, a material level sensor, a pressure sensor, a water temperature sensor and a controller. According to the system, the harmless treatment, the reduction and the recycling are realized, the environment is protected, and the energy is saved.

The invention belongs to the technical field of waste water treatment and particularly relates to a garbage leachate treating device. By virtue of the garbage leachate treating device, an adsorption-coagulation-nitrosation-anaerobic ammonium oxidation-aerobic treatment-membrane bioreactor combined process can be applied to the treatment of garbage leachate. The garbage leachate treating device comprises the following three parts: a. a pretreatment part which is formed by means of sequentially connecting an adsorption tank, a coagulation tank and a sedimentation tank; b. a denitrification part which is formed by a nitrosation reactor and an anaerobic ammonium oxidation reactor; and c. a main body treatment part which is formed by an aerobiotic tank and a membrane tank. Aiming at the water quality characteristics of the garbage leachate, the garbage leachate treating device organically combines a physicochemical treatment unit and a biological treatment unit; simultaneously the treating device is transformed reasonably and has the advantages of short and compact technological process, high treatment efficiency, low energy consumption, long membrane-component service life, and the like.

The invention discloses a method for recovering ammonian from the refuse percolate through a membrane coagulation contact reactor, and relates to a treatment method for the refuse percolate. The invention provides a method for recovering ammonian from the refuse percolate through the membrane coagulation contact reactor and a device thereof. The device is provided with a water inlet system, a membrane coagulation reactor, a membrane contact reactor, an absorption liquid vessel, an aeration pipe, an air pump and suction pump. The method comprises the following steps: sending the refuse percolate into the membrane coagulation reactor, and communicating a water outlet end and a recovery water pipe; adding a water treatment medicament into the membrane coagulation reactor, opening the air pump for aeration, obtaining the pretreated refuse percolate, sending the refuse percolate into a hollow-fiber membrane silk external passage via the membrane contact reactor through pressurization, and discharging the refuse percolate via a wastewater outlet end of the membrane contact reactor after the ammonian is removed; and sending a sulphuric acid solution into the membrane contact reactor, sending the sulphuric acid solution into a hollow-fiber membrane silk internal passage, discharging the sulphuric acid solution via an absorption liquid outlet end of the membrane contact reactor after the ammonian is absorbed, reflowing the sulphuric acid solution to the membrane contact reactor, and utilizing the absorption liquid cyclically till the absorbing capacity of the absorption liquid is saturated.

The invention discloses a bio-augmentation technique for treating high ammonia nitrogen waste water under a low temperature condition. The technique comprises the following stages: a, activating an efficient strain, and carrying out anaerobic culture, rejuvenation and propagation; b, carrying out membrane forming and acclimatisation by virtue of a biological aerated filter; and c, treating waste water in the biological aerated filter. By adopting the technique disclosed by the invention, the ammonia nitrogen removal rate in low-carbon source high-ammonia nitrogen waste water in a laboratory can reach more than 90%, the ammonia nitrogen waste water removal rate in the low-carbon source high-ammonia nitrogen waste water in an industrial experiment can reach more than 83% when the temperature is more than 10 DEG C, can reach more than 70% when the temperature is more than 4-10 DEG C and still can reach more than 61% when the temperature is 1-4 DEG C; the ammonia nitrogen concentration inthe low-carbon source high ammonia nitrogen waste water is effectively reduced, no nitrite is accumulated or few nitrite is accumulated, thus being beneficial to carrying out other subsequent biochemical reactions; and the technique disclosed by the invention can stably operate under the low temperature condition, thus having wide propagable region and being beneficial to popularization of microbiological treatment waste water.

The invention relates to a combined set for treating a micro-polluted source water in counties and towns, and the combined set comprises an inclined tube sedimentation tank, an aeration biozeolite filter column and an activated carbon filter column, wherein the inclined tube sedimentation tank consists of a water inlet region, a sloped tube region and a water collection region, the water inlet region is provided with turbulent stones and a baffle, the water collection region discharges water through a perforated water collection tank, the aeration biozeolite filter column consists of a water / gas inlet region, a filter material region and a water collection region, aeration is carried out in a blast aeration mode, gas is mixed in the water inlet region and enters the filter material region through a long-handle filter head, the filter material consists of coarse-grain zeolite and common-grain zeolite, the effluent water of the aeration biozeolite filter column enters the activated carbon column in a hydraulic drop mode, and the activated carbon filter column consists of a filter material region and a water outlet region. The inclined tube sedimentation tank water inlet region is provided with the turbulent stones and baffle to enhance the flocculation effect of the coagulant and the removal effect of the sedimentation tank. The activated carbon filter column connected to the aeration biozeolite filter column performs a two-stage biochemical synergistic action, and implements advantage complementation, thereby enhancing the water quality of the effluent water and lowering the treatment cost. The combined set can effectively remove ammonia nitrogen, organic substances, manganese and other pollutants in the micro-polluted source water, has the advantages of compact technical linkage, low investment and operating cost and stable quality of effluent water, and is suitable for being used in small-scale water generation occasions, such as water supply to counties and towns.

The invention belongs to the technical field of environment protection and particularly relates to an in-situ combination method used for surface water black odorous sediment remediation. The method includes: adding zeolite modified by zirconium to a position above a sediment-water interface, and stirring or hydraulically disturbing to mix sediment with the zeolite modified by the zirconium; injecting nitrate into the sediment; adding the zeolite modified by the zirconium and zeolite to the position above the sediment-water interface to form a first covering system; covering the first covering system with a second covering system built by geotechnical cloth wrapping special absorbent materials; continuously remedying for a certain period of time, then removing the second covering system, and allowing the first covering system to be still placed at the position above the sediment-water interface. The method has the advantages that the method combines nitrate injection, adding of the zeolite modified by the zirconium, covering by the zeolite / zeolite modified by the zirconium mixture and covering by the geotechnical cloth wrapping the special absorbent materials to remedy the black odorous sediment and control the release of sediment ammonia, nitrogen and total phosphorus, and the method can effectively prevent the nitrate from leaking into overlying water.

The invention belongs to the field of sewage treatment, and relates to a treatment method for industrial wastewater. The method comprises steps of primary precipitation, replacement reaction, secondary precipitation, ammonia stripping and ammonia recycling; removal rate to sulfate radicals in industrial wastewater is up to 80%, removal rate to ammonia nitrogen is up to 90%; the method is particularly applicable to treatment of high-concentration ammonium sulfate wastewater, meanwhile, solves the difficult problem that calcium sulphate scaling blocks equipment and pipelines and increases operation load in the conventional precipitation methods.

The invention discloses a combined soil additive composed of biological carbon and a nitrification inhibitor and a preparation method of the combined soil additive, wherein the combined soil additive are subjected to combined application under certain conditions to achieve the purposes of: 1) promoting the increase of aboveground biomass and yield of wheat, wherein the pot experiment shows that the wheat yield subjected to the combined application is respectively 80%, 65% and 103% higher than the wheat yield subjected to the single application of biological carbon, the single application of nitrification inhibitor and the application of no additive in the control treatment; 2) promoting the absorption and utilization of wheat to nitrogen, improving the nitrogen fertilizer use efficiency, wherein the pot experiment shows that the nitrogen harvest index compared with the control treatment without applying the additive is increased by 22%; 3) reducing the TN concentration in a runoff liquid and a leakage liquid as well as the TP concentration in the runoff liquid, so as to reduce the loss of nitrogen and phosphorus, avoid environmental pollution to the greatest extent; the combined soil additive has good economic and social benefits, and provides a useful reference for guiding the agricultural production.

The invention provides a cellulose degradation strain with sewage ammonia nitrogen degradation capacity, and belongs to the technical field of microorganisms. The strain is Bacillus Velezensis strainNBL-B11010. The strain is preserved in China Center for Type Culture Collection on August 31, 2020, and the preservation number of the strain is CCTCC NO: M 2020458. The strain is obtained from a farmland rotten straw material through screening, purification, identification and other technologies, safety tests and fermentation conditions of the strain are studied, straw degradation efficiency andsewage ammonia nitrogen degradation efficiency are measured, it is shown that the strain is a beneficial strain with efficient cellulose degradation and sewage ammonia nitrogen degradation capacity, and has good practical application value.

The invention relates to a method for lowering an ammonia load in a leachate treatment biochemical system. The method comprises the steps that 1, raw water containing high ammonia nitrogen is pumped into an ultrafiltration component to be subjected to ultrafiltration treatment, and ultrafiltration liquid is sent to an acid-base regulating tank; 2, base is added into the acid-base regulating tank,stirring is conducted, and water quality regulation treatment is conducted; 3, clear liquid obtained after water quality regulation treatment is conducted is subjected to impurity removal treatment bymeans of a sand filter through fine filtration; 4, microfiltration liquid is sent into a heat exchanger for heat exchange, after heating is conducted, the microfiltration liquid is conveyed into a multistage ammonia removal membrane component for ammonia removal treatment, and waste water obtained after degassing is sent into an MBR membrane bioreactor for biochemical treatment. Accordingly, theproblem that high ammonia nitrogen leachate is high in ammonia load, insufficient in carbon source and large in nitrification liquid reflux ratio and tank volume in the MBR biochemical treatment process can be solved, ammonia removal is assisted through a degassing membrane ammonia removal method, the running cost is lowered, and MBR biochemical system decarburization and denitrification can run stably.

A system and a method for treatment and recycling of coking phenol-cyanogen wastewater are used for solving the problem of difficulty in recycling of existing coking phenol-cyanogen wastewater. The system is characterized by comprising a coking phenol-cyanogen wastewater biochemical pretreating subsystem and a three-membrane method deep treating subsystem connected with same. The coking phenol-cyanogen wastewater biochemical pretreating subsystem comprises an anaerobic biological membrane reactor, an anoxic biological membrane reactor and aerobic biological membrane reactor in sequential connection, wherein the aerobic biological membrane reactor is connected with a horizontal flow sedimentation tank which is further connected with a coagulation reaction tank, and the coagulation reaction tank is connected with an oblique-plate sedimentation tank which is in connection with a first middle water tank. The three-membrane method deep treating subsystem comprises a ceramic membrane filter, an ultrafiltration membrane filter and a nanofiltration membrane filter, wherein the ceramic membrane filter is connected with the first middle water tank and further connected with the ultrafiltration membrane filter through a second middle water tank, and the ultrafiltration membrane filter is connected with the nanofiltration membrane filter through a third middle water tank.

The invention belongs to the technical field of water pollution control materials and discloses a biomass charcoal ammonia-nitrogen treatment material and a preparation method thereof. The biomass charcoal ammonia-nitrogen treatment material is prepared from biomass charcoal, hierarchical-structured Al2O3 nanosheets and CuO nano-particles, wherein a mass ratio of the biomass charcoal, the hierarchical-structured Al2O3 nanosheets and the CuO nano-particles is 50:2-5:1-5. The raw materials are easily available, surface growth components and structure are controllable, adsorptive property is improved by increasing a specific surface area, and ammonia nitrogen is degraded through synergistic effect of Cu and Al; blue-green algae, green alga and diatom are taken as precursors of the biomass charcoal, the purposes of waste control by waste as well as sustainable development are achieved, and besides, the material has the characteristics of being low in preparation cost, stable, free of secondary pollution and the like.

The invention discloses a method for strengthening amino benzenes production wastewater SBR biological treatment with synthesized macroporous high-molecular polymer as immobilization microbe. For the drawback of the prior microbe carrier, the invention provides a kind of synthesized high-molecular polymer as immobilization microbe, and applies it to strength amino benzenes production wastewater SBR biological treatment. Compared with prior SBR technique, when microbe carrier used is 2-10% of active volume of the reactor, and the technique condition such as aeration volume, reaction time and temperature equals, with the method, the clearance of amino benzenes materials improves by 35-60% and the concentration of ammonia nitrogen in water outlet decreases by 5-15mg / L. The invention can be applied for modifying the prior wastewater treatment device, or building new wastewater treatment device, having good economic profit and environmental benefit.

The invention discloses a landfill method for accelerating percolate degradation in a landfill site. The method is characterized by comprising the following steps of: arranging percolate collecting pipes in a non-full flow form, introducing air into a percolate collecting layer and air conducting gabions from the percolate collecting pipes and diffusing the air to a peripheral rubbish body during collection of landfill percolate, and setting the part region in the rubbish body in the landfill site in an aerobic environment and the other regions in a facultatively anaerobic environment and an anaerobic environment to accelerate the degradation of organic matters; at the same time, increasing the height of the percolate collecting layer, forming an artificial aerobiont filter bed on the percolate collecting layer, and forcibly degrading the percolate; and collecting the percolate, spraying percolate backwards onto the surface in the landfilling process of the rubbish, and spraying the percolate backwards to a gas collecting layer on the lower part of a closing and covering system after the landfill site is closed. Due to the adoption of the method, the pollution load of the percolate can be lowered quickly, the percolate water quality is improved, the production amount and the treatment amount of the percolate are reduced, the production of odor and methane emission are reduced, and rapid stabilization of landfill is facilitated.

The invention discloses an ammonia-nitrogen wastewater treatment technology, which is characterized by comprising the following steps: 1) wastewater with ammonia, nitrogen and other impurities enters into ammonia-nitrogen wastewater pool to be sent to an efficient coagulating sedimentation device through a waste water lift pump, PAM and PAC flocculants are added through a medicine dosing device, and most of the colloid and the suspended solids are removed in the efficient coagulating sedimentation device to allow the SS value of the wastewater to be less than or equal to 20 mg / L; 2) then the wastewater enters into a section of wastewater circulating pool where caustic soda solution and steam are added; 3) the wastewater is lift by a section of a circulating pump to pass through a section of a filter so as to enter into and circulate at one side of a membrane of a section of a degassing membrane device; 4) the section of the degassing membrane device adopts vacuum degassing method, free ammonia in the wastewater is separated to enter into the other side of the membrane in the section of the degassing membrane device and is pumped out under the action of a vacuum-pumping device to enter into an ammonia absorption device. According to the treatment technology, free ammonia is extracted from ammonia-nitrogen wastewater directly to manufacture ammonia water with high concentration to realize the recycle of resources.

The invention relates to a rana catesbeiana compound feed having the function of protecting the liver. The compound feed comprises the following raw materials of fish meal, imported meat and bone meal, corn protein powder, blood cell protein powder, national shrimp powder, defatted rice bran, soybean meal, rapeseed meal, high-gluten flour, a vitamin premix, a mineral premix, calcium dihydrogen phosphate, choline chloride, soybean oil, garlicin, bile acid, rare earth nitrate and a yucca extract. The compound feed disclosed by the invention is rich in nutrition and balanced in nutrition proportion, requirements of rana catesbeiana for protein, fat, carbohydrate and the like are met, and the compound feed can also promote fat absorption and protect the liver; and the cost of the feed is low,the growth speed of the rana catesbeiana is high, and the immunity is enhanced.

The invention discloses a black and odorous bottom mud repairing agent and application thereof. According to the invention, a biological and physical combined method is combined, the novel efficient black and odorous bottom mud repairing agent is prepared from calcium peroxide, diatomite, polyacrylamide, starch, amylase, EM bacteria, a microbial accelerator, fine sand, sodium alginate and other materials. The polluted water body, especially black and odorous water body and black and odorous bottom mud therein, can be effectively treated, COD, total phosphorus content and ammonia nitrogen concentration in the black and odorous water body are lowered evidently, ammonia nitrogen concentration and sulfide concentration in the bottom mud are lowered evidently, and the black and odorous bottom mud repairing agent takes effect quickly, has a trace and efficient effect and is extremely high in economic value and practical value.

The invention discloses a local air-water reversing upflow biological aerated filter and a sewage treatment method thereof, and relates to a water treatment device and a water treatment method. According to the biological aerated filter, a needle punched nonwoven filter material is taken as a packing, and a plurality of aeration branch pipes are arranged in the height direction of an aeration main pipe. The water treatment method comprises the following steps of: regulating the pH value of sewage to be treated to be 7.5-8, pumping into the filter, pumping air into the filter, ensuring that the hydraulic retention time is 1 to 2 hours, and directly discharging the obtained supernate. Small-flow aeration of which the aeration direction is opposite to upward water flow, the water flow is disturbed on the water flow section, air and water are uniformly distributed, a mass transfer effect is good, phenomena of short flow and channeling can be reduced, anaerobic areas in a system can be effectively eliminated, a membrane is formed uniformly, a problem of poor nitrification effect during operation of the traditional biological aerated filter is solved to a great extent, and the average ammonia nitrogen concentration of effluent is 8.63mg / L. The invention is used for treating wastewater.

The superfine water quality improving powder is prepared through mixing and calcining non-metal ore calcite, zeolite, attapulgite, bentonite and bauxite in certain proportion; selecting concentrate, crushing, grinding to reach fineness over 600 mesh, mixing the superfine powder and non-metal mineral composite agent through stirring; carbonizing the mixture powder and packing. The superfine water quality improving powder has no toxic matter and harmful matter and may be used in treating industrial effluent, domestic sewage, river water, etc., the treated water may reach the first and second water quality standard, and the used treating agent may be reused. The precipitate produced during the treatment may be reused or used as fertilizer or feed.

The invention provides a carbon source used for regulation and control of microbial community in culture pond water body and an application, the carbon source comprises the following components by weight part: 60-100 parts of soluble starch, 5-20 parts of vegetable protein and 5-20 parts of micromolecule organic acidity sodium salt. The experiment proves that the compound carbon source is capable of reducing ammonia nitrogen concentration of the pond water body, increasing algae abundance and controlling the aeromonas quantity, accordingly, the carbon source has large application potential on regulation and control of microbial community in culture pond water body.

The invention provides an ammonia-nitrogen wastewater treatment device. The ammonia-nitrogen wastewater treatment device comprises an ammonia-nitrogen wastewater pool (2), a wastewater lifting pump (12), a flow meter (14), a medicine feeder (15), an efficient coagulation settler (18), an alkali liquor adjusting tank (20), an alkali adding pump (30), a first-section wastewater circulating pool (39), a first-section circulating pump (49), a first-section first-level filter (54), a first-section second-level filter (59), a first-section vacuum degassing film device (65), a second-second wastewater circulating pool (71), a second-section circulating pump (81), a second-section filter (86), a second liquid indicator (67), a second-section direct contact type degassing film device (93), a waste acid circulating pool (98), an acid circulating pump (108) and an acid filter (112). The ammonia-nitrogen wastewater treatment device has the characteristics of being low in energy consumption, recoverable in resource, low in operation cost, simple in operation, convenient to manage, no secondary pollution, etc.

The invention relates to a method for reducing feed coefficient of Tilapia mossambica through adding a carbon source in culture water. According to the method, spreading starch accounting for 25%-35% of the overall feeding quantity of a day once a day within one hour after feeding. The invention also relates to application of starch for reducing feed coefficient of Tilapia mossambica. The method has the advantages that starch is added to the culture water of Tilapia mossambica to provide an organic carbon source for heterotrophicy bacteria in the culture water so that the heterotrophicy bacteria can use ammonia nitrogen in the water and the added starch to generate new bacterioproteins, therefore water quality is improved, water changing frequency is reduced, and dependence on the water resources during the culture process is lowered; in addition, the generated floc can be ate by Tilapia mossambica, therefore the feed utilization is improved, feeding quantity is lowered and demands on fish meal and fish oil serving as sources of proteins in the production process of feed can be reduced. The method has remarkable ecological effect, is an effective and sustainable culture way, is simple to operate and is suitable for wide popularization.

The invention discloses a method for efficient in-situ control of sludge endogenous pollution, and belongs to the field of environmental engineering water treatment. Aiming at the problem that river channel sludge endogenous pollution is difficult to efficiently control, the invention provides a method for efficient in-situ control of sludge endogenous pollution. The method basically comprises thesteps of adopting a combination of a phoslock, calcium peroxide and aluminum modified zeolite, performing sludge in-situ remediation, and efficiently restraining sludge endogenous pollution. The method is convenient for the ecological control of polluted water for the next step, and finally realizes long term improvement of water pollution conditions.

The invention discloses a preparation method of a biological activated carbon filter. The method comprises a test process. The test process comprises pre-ozonation and coagulation, settling, filteringand ozone-biological activated carbon, wherein conventional processing parameters are basically constant, that is, processing water volume is 3-3.5m<3> / h, mixing time is 6-6.5s, reaction time is 23.2-19.9min, an ascending flow rate of a settling tank clear water area is 1.39-1.62mm / s, an ascending flow rate in an oblique tube is 1.60-1.87mm / s, a filter rate of the filter is 6.49-7.57m / h, a coagulant and a pH regulating agent are respectively liquid alkaline aluminum and sodium hydroxide, feeding concentrations are respectively around 2.5mg / L and 6mg / L, and then, the biological activated carbon filter is obtained. A detection method of the filter involves ammonifying bacteria, nitrite bacteria, nitrifying bacteria, heterotrophic bacteria, and dehydrogenase activity. The preparation methodhas the advantages of eliminating organic matters and polluted matters in feed water of a carbon filter of a water supply factory and purifying the water. Compared with other sewage deep processing technologies, the biological activated carbon filter prepared by the method has a simple structure, occupies a small space, and runs conveniently.