2001 results about "Total phosphorus" patented technology

The invention relates to a rapid efficient ammonia nitrogen remover and a preparation method and application thereof. The rapid efficient ammonia nitrogen remover is prepared from the following components in percentage by mass: 5-35% of an oxidant, 5-50% of an inorganic coagulant, 2-40% of an adsorption material, 1-15% of a calcium salt and 1-20% of an effervescent disintegrant. The rapid efficient ammonia nitrogen remover can be dissolved in water, and is free of a residue, free of secondary pollution, the operation is simple and convenient, the time required for purifying the water is short, ammonia nitrogen can be quickly and efficiently removed, and the rapid efficient ammonia nitrogen remover has a certain removal effect on COD, total phosphorus and suspended matters at the same time. The rapid efficient ammonia nitrogen remover integrates oxidation, breakpoint chlorination, coagulating sedimentation, adsorption, pH value control and rapid collapse body dissolution, and the ammonia nitrogen can be quickly and efficiently removed.

The invention discloses a novel compound microorganism living bacteria agent. The agent comprises probiotics such as pediococcus, saccharomyces, bacillus and the like, wherein the total bacterial quantity is above 107 colony-forming units (cfu) / gram. The invention further discloses a method for preparing the novel compound microorganism living bacteria agent and applications of the novel compound microorganism living bacteria agent in preparation of organic sewage purification additives, deodorization fly dispelling agents, degreasing agents, pipeline blockage removing agents, feed additives and microorganism disease prevention agents. The novel compound microorganism living bacteria agent has the comprehensive effects of high removal rates to ammonia nitrogen, total nitrogen and total phosphorus, small sludge residues, energy saving, environmental friendliness and the like and the characteristics of convenience in use, safety and quickness in function, no secondary pollution, benefits to ecological protection, low treatment cost, good comprehensive profit and the like.

The invention relates to a treatment method of waste water containing organic phosphorus, comprising the following steps: leading process waste water containing organic phosphorus to pass through a sand filtration tank for removing suspended matter and then adjusting the pH value thereof to 3-4; leading the process waste water to pass through a high-efficient catalytic oxidation apparatus, adding hydrogen peroxide for conducting oxidative degradation of the process waste water; then introducing the process waste water to a catalytic micro-electrolysis device, adding scrap iron and activated carbon and stirring, conducting electrochemical reaction, blasting air into the lower part of the catalytic micro-electrolysis device, and removing hard-degradable organic matter in the process waste water; and introducing the effluent of the catalytic micro-electrolysis device into an oxidation kettle, adding hydrogen peroxide for conducting multistage oxidation treatment, later adding lime, adjusting the pH value of the process waste water to 8-9, then adding flocculant for conducting precipitation, and forming ironic phosphate and calcium phosphate precipitate, thus removing phosphorus in the waste water. Compared with the prior art, the treatment method transforms the organic phosphorus into inorganic phosphorus for removal and has high removal rate of total phosphorus and low running cost, and the formed phosphate can be recycled and reused.

The invention belongs to the technical field of water treatment and particularly relates to a method and a system for advanced treatment of centralized rural domestic sewage. The treatment system comprises a hydrolytic acidification tank, a composite tower type ecological filter and a surface flow artificial wetland system. The treatment method comprises the following steps of: collecting sewage through a pipe network, allowing the sewage to enter the hydrolytic acidification tank which is a landfill tank, stabilizing and regulating the water quantity, and pumping the sewage into a high-position service reservoir by using a submersible electric pump with the head of more than 5m; distributing the domestic sewage of the hydrolytic acidification tank into the composite tower type ecological filter by strengthening water distribution measures, and removing organic pollutants, total nitrogen, ammonia nitrogen, total phosphorus and pathogenic microorganisms in the sewage; and allowing tail water and collected rainfall runoff to enter the artificial wetland system for advanced treatment. A good water environment landscape can be built for an artificial wetland; and the effluent reaches the first-grade A standard of discharge standard of pollutants for municipal wastewater treatment plant (GB18918-2002).

The invention relates to a density forecast method of the chlorophyll a stemmed from a water body of the BP neural network. The density forecast method comprises the following steps: (1) the chlorophyll a in the tested water body and the value of other correlative water quality index which influences the chlorophyll a are acquired as the examination data. (2) The neural network of an error back propagation is established. (3) The neural network is trained and tested. (4) The neural network which passes the test is utilized to forecast the chlorophyll a in the water body. Other water qualities which influence the chlorophyll a are: Ammonia nitrogen, total nitrogen, total phosphorus, orthophosphate, permanganate index, temperature, dissolved oxygen, pH, suspension, five-day biochemical oxygen demand. The step (1) also comprises a normalization process. The data of the chlorophyll a and other ten water quality indexes are between -1 and +1 after the data of the chlorophyll a and other ten water quality indexes are normalized. The neural network comprises an input layer, an intermediate layer and an output layer. The invention can establish a forecast model related to the chlorophyll a, just needing the experiment which has the limited times. The chlorophyll in the river can be accurately and quickly forecasted through the computer simulation experiment and the science forecast.

The invention discloses a method for commprehensively treating phosphorus-containing waste water. The method mainly comprises the steps of: classifying waste water with total phosphorus concentration being 20-10000mg / L generated in a factory; for different types of phosphorus-containing waste water, carrying out different combined pre-treatment of more than two of iron-carbon micro-electrolysis, oxidation, coagulating sedimentation, lime stone neutralization and the like; and afterwards, further carrying out biochemical treatment so that the waste water reaches the emission standard with TP (Total Phosphorus) being smaller than or equal to 0.5mg / L.

The invention relates to a method for preparing iron phosphate from ferrophosphorus. The ferrophosphorus is used as a part or the whole of a phosphorus source and an iron source for preparing the ironphosphate. The phosphorus source or the iron source is supplemented according to a mol ratio of (0.8-1.2):1.0 between total phosphorus elements and total iron elements. The ferrophosphorus is roastedin a dry and oxygen-containing atmosphere. The iron phosphate product is obtained by means of dry or wet oxidation product reaction. The method adopts the ferrophosphorus as the raw material for preparing the iron phosphate, makes full use of elements in the ferrophosphorus and creates a novel preparing process of iron phosphate. In addition, as the reaction process can be used for weakening or eliminating the influence of impurity elements in the ferrophosphorus on the iron phosphate product, the method indirectly purifies the ferrophosphorus and eliminates the influence of the impurities inthe ferrophosphorus and the problem of severe corrosion caused by the existence of water during the roasting of ferrophosphorus. The reaction process has relatively low demand on apparatuses. The preparing method has simple process, short production flow and low production cost, is clean and environment-friendly, realizes high resource utilization rate, low investment and good benefit and is suitable for large-scale, industrial, low-cost and clean preparation of iron phosphate.

The invention discloses an aerobic-anoxic-anaerobic integrated module type fast denitrogenation reactor for sewage and a treatment method thereof and relates to an integrated sewage treatment device, which is particularly suitable for fast integrated treatment for sewage by denitrogenation technology. The device is designed for solving the problems of complex process, high treatment expense, additional carbon source and regulation of outflow pH, difficult zero discharge and the like existing in aerobic-anoxic-anaerobic denitrogenation sewage treatment. Aerobic-anoxic-anaerobic processes are technically integrated to enable sewage to be always in an alternate aerobic-anoxic-anaerobic environment; an organic carbon source, organic nitrogen and total phosphorus are distributed reasonably to avoid shortage of carbon source during denitrogenation, so that total nitrogen and total phosphorus are converted effectively, the effect of denitrogenation and dephosphorization are improved, and discharged water reaches first discharge standard of Integrated Wstewater Discharge Standard (GB8978-1996). The device is used for treating municipal domestic sewage, especially sewage of middle and small stations along railway lines.

The invention relates to a microbial agent for purifying river wastewater and a preparation method of the microbial agent. The microbial agent comprises the following components in parts by weight: 20-40 parts of bacillus natto, 10-30 parts of nitrobacteria, 5-15 parts of white-rot fungi, 5-15 parts of pseudomonas and 10-40 parts of photosynthetic bacteria. The microbial agent is well-adapted and has the capabilities of fast forming dominant bacterial communities and replenishing indigenous rhizobia to the water body; and the microbial agent can be used for reducing the COD (Chemical Oxygen Demand), NH3-H, total nitrogen, TP (Total Phosphorus) and the like, removing odor and color and producing high-activity bio-enzyme to suppress the growth of harmful bacteria and acceleratively decompose residual baits as well as animal and plant residues, and a remarkable water quality purifying effect is achieved.

The invention provides an online automatic monitoring system of total nitrogen and total phosphorus in seawater and a monitoring method thereof. The system comprises an automatic seawater liquid feedcontroller, an ultraviolet microwave digestor, a total nitrogen measuring flow passage, a total phosphorus measuring flow passage and a spectrophotometer, wherein the automatic seawater liquid feed controller is connected with the ultraviolet microwave digestor by a liquid feed pipeline; digested sample flows into an electronic cooler from a liquor drainage pipeline of the ultraviolet microwave digestor to be cooled and respectively enters into the total nitrogen measuring flow passage and the total phosphorus measuring flow passage; the total nitrogen measuring flow passage comprises a nitrate ion reducing device, a sample reaction pipeline is connected with the spectrophotometer, and the front end of the sample reaction pipeline is provided with a nitrite color reagent injecting valve; and the total phosphorus measuring flow passage comprises the structure that the sample reaction pipeline is connected with the spectrophotometer, and the front end of the sample reaction pipeline is provided with an orthophosphate color reagent injecting valve. The invention can complete work procedures such as automatically sampling seawater, digesting, reducing, washing, measuring, and the like,at one time.

The invention relates to a method for determining an environmental-protection dredging range based on water pollution bottom mud identification and evaluation, and the method comprises the following steps of formulating a potential pollutant list of the water bottom mud; formulating a sampling scheme of the water bottom mud and sampling the bottom mud according to the sampling scheme; analyzing and testing the collected sample to obtain a physical index and a chemical index of the sample; primarily identifying and evaluating the water bottom mud; determining a position and a range of a key research area, and determining pollution research areas and key pollutants of different types by utilizing the spatial interpolation analysis of a geological information system; identifying and evaluating the key research area and the key pollutants in detail; and utilizing a spatial analysis module in the geological information system to overlap a determined general nitrogen severe pollution area, main phosphorus severe pollution area, heavy metal high-risk area and durable organic pollution area, so that the bottom mud environmental-protection dredging range of different pollution types can be obtained. Due to the adoption of the method, the environmental-protection dredging range of the pollution bottom mud can be precisely determined.

The invention relates to the technical field of sewage treatment and in particular relates to a solid carbon source as well as a preparation method and application thereof. The solid carbon source is obtained by uniformly mixing at least three substances rich in cellulose, pelletizing and firing. The solid carbon source is placed in an oxygen-poor tank to supply nutrient substances to microorganisms, sewage which is homogenized and averaged sequentially flows through a pre-denitrification tank, an anaerobic tank, an anoxic tank, an aerobic tank and a sedimentation tank to be treated, total nitrogen content of discharged water is equal to or less than 10mg / L, and total phosphorus content is equal to or less than 0.5mg / L. The solid carbon source is made of multiple substances rich in cellulose, fibers of various substances can be easily penetrated and wound, after mixing and firing are carried out, a compact cellulose layer structure can be formed, so that release rate of the solid carbon source is greatly reduced, and a carbon source in the sewage can be stable and sufficient for a long time; besides, the solid carbon source is made of multiple substances, abundant nutrient substances can be supplied to the microorganisms, different functions requirements for metabolism can be met, and utilization ratio of the carbon source is increased.

For a long time, sewage plants are troubled by the problems of large energy consumption, high operating cost, foul odor generation and the like. Therefore, the invention provides a complex biological filter which can make use of a microbial metabolism to synchronously treating sewage and off odor, and comprises the following characteristics of: greatly saving aeration energy consumption and reducing the operating cost by supplying oxygen in a trickling filtration mode; forming an aerobic section and an anoxic section in the same biological filter by optimizing the structure of the biological filter, and supplementing a carbon source through water inflow distribution to ensure that the removal efficiency of total nitrogen is improved; improving the removal efficiency of total phosphorus in the sewage through enhanced phosphorus removal of a filling material; and saving a secondary sedimentation tank because the upper part of the complex biological filter generates a small amount of excess sludge and the anoxic section on the lower part can further perform filtration and interception.

The invention discloses efficient heterogeneous catalytic oxidation ferric-carbon micro-electrolysis packing and a preparation method thereof. The packing is prepared from the following raw materials in parts by weight: 45-65 parts of pure iron powder, 10-25 parts of cast iron powder, 2-8 parts of graphite powder, 5-15 parts of active carbon powder, 2-10 parts of copper powder, 2-10 parts of manganese powder, 2-10 parts of aluminum powder, 2-10 parts of fine wood bits, 1-6 parts of sodium silicate, 1-6 parts of sodium borate, 2-6 parts of pyrite dust and 5-15 parts of an adhesive. The efficient heterogeneous catalytic oxidation ferric-carbon micro-electrolysis packing disclosed by the invention is prepared by taking heterogeneous metal alloy with high potential difference as a catalyst and using a high-temperature micropore roasting technology and has the characteristics of heterogeneous metal and ferric-carbon integration, micropore framework type alloy structure, large specific surface area, low density, strong activity, high current density and the like; organic wastewater is treated so that COD, ammonia nitrogen and total phosphorus can be efficiently removed, the chroma can be reduced, the biodegradability can be improved, the treatment effect is extremely stable, and the phenomena of packing passivating, hardening and the like caused in the operation process can be avoided.

The invention provides a phosphorous removing agent for wastewater produced during producing organophosphorus pesticides and a preparation method thereof. The solid phosphorous removing agent which can effectively remove total phosphorus from the wastewater produced during producing the organophosphorus pesticides is prepared by mixing a mineral with a metal compound and supporting the metal compound with the mineral. The phosphorous removing agent and the preparation method have the following beneficial effects: the production process is simple; the production cost is low; no harmful gas or sewage is generated in the production process; and the phosphorous removing agent can be widely used for removing phosphorous from the wastewater produced during producing various organophosphorus pesticides and has an obvious phosphorous removal effect.

The invention relates to a compound microbial bacterial preparation for efficiently degrading feces and a preparation method and application of the compound microbial bacterial preparation. The compound microbial bacterial preparation is prepared from bacillus subtilis, bacillus cereus, bacillus megaterium, geobacillus stearothermophilus, aspergillus oryzae, trichoderma longibrachiatum, sporotrichum thermophile and streptomycesmicroflavus through solid fermentation. The compound microbial bacterial preparation can shorten the fermentation time of feces, and effectively kill larva, eggs and pathogens in the feces, and further improves the content of organic matters, total nitrogen, total phosphorus, and total potassium in the fermented materials.

The invention relates to a method for estimating the nonpoint source pollution load of a village adjacent to a river. The method comprises the following steps: 1) basic information collection, in which average rainfalls R1, R2 and R3 of years of accumulation for light rain, moderate rain and heavy rain to rainstorm in a certain place, village area A and other basic situations are acquired; 2) field detection, in which, every runoff coefficient, runoff duration and runoff yield area of rainfall duration, rainfall capacity and rainfall runoff of an effective rainfall number are detected, and chemical oxygen demand, total nitrogen and total phosphorus of a collected water sample are detected; and 3) nonpoint source pollution load model estimation, in which, the annual pollution loads of chemical oxygen demand, total nitrogen and total phosphorus of nonpoint source pollutants of the village by the river are calculated by adopting a formula. The calculation method provided by the inventionhas more guidance significance, and is convenient to develop related control and management measures.

The invention relates to a preparation method of abamectin dreg fertilizer; the method solves the problem that: the existing preparation method of the organic fertilizer affects the content of total nitrogen, total phosphorus and total potassium when reducing the content of inorganic nitrogen, phosphorus and potassium in the fertilizer. The preparation method is characterized in that: the preparation method comprises the following steps: (1) dairy manure, slag, maize straw, ammonium hydrogen carbonate and potassium sulphate are uniformly mixed, composted and fermented; after the fermentation is finished, the dairy manure, the inorganic nutrients of which are fixed by microorganisms is obtained; (2) the abamectin dreg is dried to have 40-55% of the water content; (3) the dairy manure, the inorganic nutrients of which are fixed by microorganisms, the abamectin dreg, humic acid and argil are uniformly mixed and are made into particles, thus obtaining the abamectin dreg fertilizer. The method not only can improve the content of total nitrogen, total phosphorus and total potassium in the organic fertilizer, but also can effectively reduce the content of inorganic nitrogen, phosphorus and potassium in the fertilizer simultaneously; therefore, the produced fertilizer has high content of the total nitrogen, the total phosphorus, the total potassium and organic matters.

The invention relates to a method and a system for monitoring total phosphorus and total nitrogen of water quality on line. The monitoring method comprises the following steps of: a, acquiring a water sample; b, performing ultraviolet digestion on the acquired water sample according to the principle of ultraviolet digestion and ultraviolet absorption methods; and c, discharging the digested water sample into a cuvette to perform ultraviolet absorption through ultraviolet light, and meanwhile calculating light intensity through a light sensitive sensor to obtain the concentration of pollutants. The detection system comprises a PLC, a CPU, a sample pretreatment device, a multi-way sampling valve, an injector, a reactor, a detector, a human-computer interface and a communication interface, wherein the sample pretreatment device, the injector, the reactor and the detector are connected to the multi-way sampling valve through pipelines respectively. The method and the system can efficiently, quickly, stably and accurately perform continuous detection, storage and forwarding on the concentrations of the total phosphorus and the total nitrogen, and have the advantages of high measurement precision, stable performance, high efficiency, small volume, light weight, convenient assembly and debugging, low cost, low energy consumption, independent use, long-term continuous work and the like.

An apparatus and method for removing phosphorus from a wastewater effluent stream from a hog waste lagoon. The wastewater effluent is introduced to the bottom of an inverted cone-shaped continuous crystallizer including a fluidized bed of struvite therein. An effective amount of ammonia is introduced to the wastewater effluent at the bottom of the crystallizer to elevate the pH of wastewater effluent a predetermined amount. An effective amount of magnesium is also introduced to the wastewater effluent at the bottom of the crystallizer. The composition adjusted wastewater effluent is then continuously passed upwardly through the fluidized bed of struvite to reduce the total phosphorus content of the wastewater effluent a predetermined amount of up to about 80% or more. The treated wastewater effluent stream is removed from the top of the crystallizer, and struvite crystals that grow large enough to sink from the bottom of the crystallizer are periodically removed from a collection chamber therebeneath.

The invention belongs to the circulating cooling water treatment technical field, and refers in detail to an environment-protecting composite pretreatment filming agent used for the pre-treatment filming in a circulating cooling water system and a use method thereof. The environment-protecting composite pretreatment filming agent comprises the main components of 2-phosphonobutane- 1, 2, 4-tricarboxylic acid and sodium of polyepoxysuecinic acid as well as a proper amount of carboxylic acid copolymer, benzotriazole, sodium molybdate, zinc sulphate and so on. When used, the composite pre-treatment filming agent is added into the circulating cooling water directly, and a corrosion-resistant protecting film is formed after 48 years of operation, the corrosion resistance of which to the standard copper sulphate drip solution is far better than the traditional phosphor-zinc pretreatment filming agent. The total phosphor content of the environment-protecting composite pretreatment filming agent is less than 7.5mg / l, and the water pH value does not have to be adjusted. After the pretreatment filming, the water is clear and transparent, and the normal operation can be started without replacing the water. Thus, not only the water to be replaced is saved, but also the chemical base investment expense during the normal operation after the water replacement is reduced. Meanwhile, no waste liquor of pretreatment filming is discharged, so the invention belongs to the environment-friendly pretreatment filming method.

The invention discloses a formula of a special completely mixed pellet feed for fattening sheep and a preparation method. The formula comprises corns, barley straws, sunflower cakes, alfalfa meal, cottonseed meal, wheat middling, malt roots, soybean meal, stone powders, molasses, puffing urea, baking soda, salt, 0.2% of polymineral for mutton sheep, calcium hydrogen phosphate, multivitamins for mutton sheep, monensin, a sweetener and a flavouring agent, wherein nutrients comprise dry matters, crude protein, calcium, total phosphorus, the salt, digestible energy for sheep and coarse fiber. The preparation method comprises the steps of: mixing the stone powder, the baking soda, the salt, the 0.2% of polymineral for mutton sheep, the calcium hydrogen phosphate, the multivitamins for mutton sheep, the monensin, the sweetener and the flavouring agent to prepare a semi-finished product A; grinding the corns, the sunflower cakes, the alfalfa meal, the puffing urea, the cottonseed meal, the wheat middling, the malt root, the soybean meal and the barley straws; and evenly mixing the materials by adopting a mixing machine, preparing the materials to be granular through a granulating process, and spraying the molasses on the surface of the pellet feed through a spraying process. The special completely mixed pellet feed for fattening sheep accords with the national green food concept, and has a good development prospect.

The invention discloses a composite flocculant and a preparation method and application thereof. The flocculant is prepared from rare-earth carbonate, sodium silicate and ferric sulfate / aluminum sulfate serving as raw materials by a composite copolymerization method. The effect of the composite flocculant of the invention is superior to that of the conventional polymeric ferric / aluminum silicate sulfate; the chroma removal rate of wastewater reaches over 90 percent; the COD Cr removal rate reaches over 65 percent; the removal rate of total phosphorus reaches over 88 percent; and the expense of a wastewater treatment medicament is reduced by 10 to 20 percent compared with PASS. The composite flocculant has rapid, large and solid alumen ustum, reduces the use amount of a single dye wastewater coagulating agent by over one half compared with PAC and by over 20 percent compared with PASS, improves the chroma removal rate of the wastewater by about 10 percent, has low processing cost, and improves the processing effect.

The invention provides a combined process of tower angleworm bio-filters and constructed wetlands for treating the domestic sewage. The combined process comprises the following steps: firstly, the sewage enters a hydrolysis-acidification pool and stabilizes after the action, and the water quantity is adjusted; secondly, the domestic sewage in the hydrolysis-acidification pool is distributed into a hydrolysis-acidification pool for removing COD, total nitrogen, nitrogen-nitrogen, total phosphorus and pathogeny microbes; and thirdly, the tail water in the second step enters a constructed wetland to be subjected to strengthening treatment, thereby building a suitable waterfront surroundings landscape, or the tail water is recycled by serving as reclaimed water. The combined process has the following advantages: firstly, the system hydraulic loading is high, and the surface hydraulic loading can reach 1m<3> / m<2>*d, thereby greatly saving land; and secondly, under the high hydraulic loading, the total nitrogen removal rate of the system can reach more than 85 percent; the removal rates of other materials in the system are all more than 90 percent, the effluent reaches the primary standard of the national sewage comprehensive emission standard (GB8978-1996), and reaches the miscellaneous domestic water quality standard of the PRC construction standard (CJ25.1-89), thereby being able to be recycled by serving as the reclaimed water.

The technological process for producing high-quality organic fertilizer by using house refuse includes the following steps: separating useful organic material and sewage sludge, making the mixture ofexcrement and urine, pulverized plant straw, nitrogen and phosphorus elements implement anaerobic fermentation to produce impure methane, mixing residual dregs and liquor and making aerobic compost fermentation. The product made up by using said invented method possesses brown colour and loose and uniform granules, and is smellless. The examination shows that total quantity of measured carbon, cellulose and fats is reduced, the colibacillus and ascarid ova are obviously reduced or eliminated, and its fertilizer efficiency is high, and includes organic matter is greater than 40%, total nitrogen 10-12%, total phosphorus 5-7%, total potassium 3-5%, rapidly available nitrogen 223.4 ppM and rapidly available phosphorus 215.8 PPM.

A pond-lake heavy-metal pesticide fertilizer pollutant solidifying removing agent relates to the technical field of disinfectants, and is composed of the following raw materials: 450-600 parts of montmorillonite, 150-300 parts of silicate clinker, 80-150 parts of quicklime, 50-100 parts of modified starch, 10-30 parts of plaster, 3-6 parts of glucoside, 5-10 parts of alum, and 3-8 parts of calcium chloride. The beneficial effects comprise that the employed raw materials are abundant and cheap, the preparation technology is simple, the agent is applicable to pollution cleaning of large-scope water body of ponds, lakes and rivers, is capable of rapidly thoroughly eliminating organic harmful substances, chemical pesticides and harmful microbes and heavy metals in water body, has improving eliminating effect on total phosphorus and total nitrogen in eutrophic water, has growth-controlling effect on algae in water body, and has water-bottom anti-permeation effect and effect of preventing heavy metals from permeating and polluting water resource.

Aiming at the shortage of secondary nitrification effluent depth nitrogen and phosphorus removal technology for the existing sewage plants in cities, the invention provides a water pollution purification method of ion exchange depth nitrogen and phosphorus removal. By the design and creation of factors such as conventional strong basic anion exchange resin operating parameters, and the like, the invention simplifies resin activation, regeneration processes as well as ion exchange reactor configuration type and takes the method as a secondary nitrification effluent depth treatment technology for the urban sewage plants, or an eutrophication lake situ purification technology. The invention not only has very high total phosphorus removal rate, but also has better nitrate removal effect, and also has the advantages of low running cost, small amount of sludge and the like.

The invention relates to a sponge iron-AT (Aluminium Titanate)-PVF (Polyvinyl Fluoride) composite filler and application thereof on water treatment. The composite filler is formed by filling attapulgite composite hydrophilic polyurethane foam of the size of 1.5*1.5*1.5cm and sponge with the grain diameter of 2-5cm at the weight ratio of 1: (4-50). The sponge iron-AT-PVF composite filler has the characteristics of low cost, good water treatment effect, high degrading speed and high removal rate on elements N and P as well as organic matters which are difficult to be degraded in the wastewater. The TN (Total Nitrogen) and TP (Total Phosphorus) indexes in the effluent can be drastically lowered under the aerobic or anaerobic conditions when the composite filler is put into a common biochemical treating pond.

The invention discloses a method for removing total phosphor by chemical nickel-plating wastewater treatment. The method comprises the following steps: (1), collecting nickel-containing wastewater (hereinafter referred to as wastewater) to a homogenizing pond, and regulating the pH value of the nickel-containing wastewater to 3-4; (2), carrying out strong-alkalinity anion exchange treatment to the wastewater for complexing and destabilizing the treated wastewater; (3), carrying out strong-acidity cation exchange treatment to the wastewater for recycling nickel; (4), adding oxidant o the wastewater; (5), carrying out catalytic oxidation on the wastewater for oxidizing hypo-phosphorous acid and phosphorous acid to orthophosphoric acid, and degrading macromolecule organic complexing agent to micromolecule, so that the macromolecule organic complexing agent loses complexing capacity; (6), carrying out pulse electro-coagulation treatment on the wastewater for reducing emission concentration of the nickel ion; (7), carrying out solid-liquid separating treatment on the wastewater, regulating the pH value, carrying out flocculation so that suspended matter and sludge agglutinate, and are easy to precipitate and separate, and exhausting the liquid supernatant as required by the standard. The method provided by the invention can treat the nickel-containing wastewater to directly reach the national-level emission standard (the concentration of nickel being lower than 0.1 ppm), further can realize recycling the nickel resources and improve the water-treatment economic benefits.

The invention belongs to the field of preparation of environmental-friendly absorbing materials and discloses a modified pumice absorbing material and a preparation method as well as application of the modified pumice absorbing material, wherein the pumice is modified by utilizing active ingredients in red mud. The preparation method comprises the following steps of: after soaking pumice particles with grain size of 2-10 mm by using a nitric acid solution, cleaning by using water, and then filtering, drying, roasting and cooling to obtain a pumice absorbent to be modified; adding the red mud into the nitric acid solution, stirring for reaction for 30-90 minutes, and filtering to obtain red mud impregnation liquid; putting the pumice absorbent to be modified into the red mud impregnation liquid, soaking at 60-80 DEG C for 4-8 hours, filtering and drying, heating to 1000-12000 DEG C by means of a procedure for roasting, and cooling to obtain the modified pumice absorbing material. The material has the advantages of recycling property, widely and easily obtainable raw materials, low cost, good treatment effect and higher removal rate in particular for total nitrogen and total phosphorus in the sewage, and can be used for secondary and deep treatment of all kinds of sewage, reuse treatment of recycled water and the like.