39results about How to "Good phosphorus removal effect" patented technology

The invention discloses porous phosphorus removing ceramic granules with a function of slowly releasing an alkali and a preparation method thereof. The prepared ceramic granules are an environmental material for efficiently removing phosphorus from municipal sewage and industrial wastewater. Based on the basic chemical properties of the phosphorus in water and a phosphorus removing mechanism by chemical absorption, the preparation method of the ceramic granules comprises the following steps of: mixing 20 to 40 mass percent of ordinary portland cement (42.5 level), 10 to 20 mass percent of bentonite, 10 to 20 mass percent of fly ash, 10 to 15 mass percent of calcium oxide, 15 to 25 mass percent of nitrocellulose, 14 to 30 mass percent of xonotlite fiber particle and 0.1 to 0.5 mass percent of pore-creating agent; adding water for stirring the mixture according to a water-solid ratio of 0.35 to 0.45; granulating the mixture into granules with required grain sizes; and after the granules are foamed and solidified, curing the granules by using high-temperature steam to obtain the ceramic granules. The method has the advantages of simple preparation process, readily available raw materials, low cost and wide application prospect in the field of the removing of the phosphorus in water bodies. The prepared ceramic granules have the characteristics of capacity of slowly releasing the alkalis, silicic and calcareous textures, porosity, capacity of continuously and efficiently absorbing and removing the phosphorus and suitability for phosphorus removing systems of the municipal sewage and the industrial wastewater.

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 simultaneous phosphorus and nitrogen removal light material, a preparation method and the application thereof, and belongs to the technical field of environment function materials and sewage disposal. A fusion mixture is obtained by sufficiently fusing and dispersing sulfur and an iron-based component, wherein the iron-based component is a pyrite and calcium magnesium carbonate mixture; and foaming treatment is carried out on the fusion mixture to form the simultaneous phosphorus and nitrogen removal light material. The simultaneous phosphorus and nitrogen removal light material disclosed by the invention has the characteristics of high porosity, large specific surface area, light weight and high reaction activity. The obtained light material, as a microbial carrier and an electron donor of biochemical reactions, is applied to the reactors, such as fixed beds and fluidized beds, for sewage disposal, and has the advantages of good microorganism adhesion property, high denitrification speed and good phosphorous removal effect.

The invention relates to a method for treating wastewater and equipment thereof. A method for treating acid wastewater generated during high phosphorus hematite ore dressing is characterized in comprising the following steps: 1)a step of preparation of modified red mud is prepared, which comprises the following sub-steps: (1) red mud is dried, crushed and passed through a 20-mesh sieve to obtain red mud powder; (2) according to a red mud powder to hydrochloric acid ratio of between 40 to 60g:1L, the red mud powder is added into the hydrochloric acid, fully stirred in a water bath pot at 60 to 100 DEG C for 1 to 2 hours and cooled to obtain a mixed solution, and (3) the mixed solution is added with ammonia water with stirring, subjected to adjustment pH value to between 7.5 and 8.5 and keeps stand; and the obtained precipitate is washed with distillate water, dried, crushed, passed through a 60-mesh sieve to obtain the modified red mud; and 2) according to a principle of 6 to 23 grams of modified red mud for per litter of acid wastewater generated during the high phosphorus hematite ore dressing, modified red mud is added into a coagulative precipitation tank containing acid wastewater generated during the high phosphorus hematite ore dressing and stirred for 1 to 2 hours to obtain mud-water mixed liquid; and the mud-water mixed liquid flows to a dynamic membrane reactor to obtain reusable acid purified water. The method has the characteristics of good treatment effect, simple process operation, high water flux, low cost, short treatment period, etc.

The invention belongs to the field of water treatment, and in particular relates to an iron-aluminum-manganese composite metal oxide adsorbent for efficiently removing phosphate from water and a preparation method thereof. The iron-aluminum-manganese composite metal oxide adsorbent for removing phosphate from water is prepared from raw materials including ferrite, an aluminum salt and permanganate through an oxidation-reduction and coprecipitation method, and comprises the components including hydroxyl iron oxide hydrate, hydroxyl aluminum oxide hydrate, manganese oxide hydrate and the like. The iron-aluminum-manganese composite metal oxide adsorbent has rich surface activity adsorption sites and high isoelectric points (IEP>8.5). The electrostatic adsorption of composite metal oxides to the phosphate in water is strengthened by using synergistic action of all component metal oxides. The iron-aluminum-manganese composite metal oxide adsorbent provided by the invention can be used for removing phosphate from reservoirs, rivers, lakes, drinking water and urban sewage, and can also be used for removing contaminants including arsenate, selenate, fluorine ions and the like.

The invention discloses a method for removing total phosphorus in waste water through a chemical / biological reaction synergistic effect. According to the invention, the advantages of chemical phosphorus removal and biological phosphorus removal are combined, and the synergistic effect of chemical and biological phosphorus removal is adopted. The total phosphorus in the waste water is removed through discharging sludge formed by high-phosphorus-content sludge and phosphorus-containing precipitates mainly containing struvite in a preaeration tank. The method disclosed by the invention is simply operated; the removal rate of the total phosphorus is up 96.8%; when the total phosphorus is removed, parts (30-40%) of organic pollutants and nitrogen can be removed, so that the burdens of subsequent aerobic biological treatment and deep treatment can be alleviated.

The invention belongs to the field of pollution treatment and particularly relates to a phosphorous-removing double-metal organic framework material and a preparation method and application thereof. The double-metal organic framework material is prepared by using iron salt, zirconium salt and 2-aminoterephthalic acid as the raw materials and PVP as the auxiliary through a solvothermal method. Thedouble-metal organic framework material is excellent in phosphorous removing effect due to fact that Fe and Zr in the material and phosphate form Fe-O-P / Zr-O-P through ligand exchange, the amino in the material has a static adsorption effect on phosphate and surface or active sites have a chelating effect. The prepared double-metal organic framework material can still have an adsorption removing rate of 80% or above after being reused for 10 times and is excellent in regenerability and reusability and huge in practical application value.

The invention discloses a controllable subsurface artificial wetland sewage treatment system with inflowing at the two ends periodically and alternately and a treatment technology thereof. The system comprises a wetland inlet water distribution area, a wetland body part and a wetland outlet water collection area, wherein the water distribution area and the water collection area are positioned at the two ends of the whole system and form a symmetrical structure; the wetland body part is positioned between the wetland inlet water distribution area and the wetland outlet water collection area. Water inlet pipes are embedded in the upper parts of the walls on the side surfaces of the wetland inlet water distribution area and the wetland outlet water collection area, and more than two lines of water out pipes which are parallel with one another are embedded in the walls below the water inlet pipes. The wetland body part comprises a wetland matrix padding positioned at the bottom of the body part and economic plants planted on the wetland matrix padding. The sewage treatment system improves the growth conditions with obvious difference caused by uneven concentrations of nutrients of the plants at the front end and the rear end of a wetland in the traditional wetland system by periodically changing wetland water inlet points, and obtains good economic benefit while realizing the recycling of nitrogen and phosphorus in sewage.

The invention relates to the field of acid vanadium solution purifying and dephosphorization, and discloses a method for selectively removing the impurity phosphorus from a vanadium solution obtainedthrough vanadium slag calcification and acid leaching. The method comprises the following steps that powdery calcium silicate is calcined and activated; the calcined and activated powdery calcium silicate is added into the vanadium solution obtained through vanadium slag calcification and acid leaching, the pH value of the solution system is adjusted to be 2.5-5.0, stirring, reaction and filtration are carried out, and the low-phosphorous vanadium solution is obtained. According to the method for selectively removing the impurity phosphorus from the vanadium solution obtained through vanadiumslag calcification and acid leaching, the dephosphorization efficiency is high, the cost is low, the allowed impurity phosphorus concentration range is large, phosphorus can be selectively removed, and the vanadium loss rate is low.

The invention discloses a technology of synchronous removal of nitrogen, phosphorus and suspended solids. The technology comprises the following steps: during the filtration process, raw water is filtered downwards under the action of gravity, sequentially passes through a biological filter material layer, a fine filtration layer, a supporting layer and a filter head, and is discharged from the bottom; during the nitrogen removing process, water inflow is stopped, the liquid level is lowered, backwashing water is distributed through the filter head, the distributed backwashing water is introduced upwards into the biological filter material layer, and the accumulated nitrogen bubbles in the filter material are removed; during the backwashing process, uniform distribution of gas and water is carried out through the filter head, water is introduced into the biological filter material layer, and the biological filter pond is cleaned. The technology has the advantages of being large in hydraulic loading, small in occupied area, good in removing effects of nitrogen and phosphorus and suspended solids, good in effluent quality and simple in operation and maintenance.

The invention relates to the field of phosphor removal of an acidic vanadium-containing solution, and discloses a method for carrying out phosphorus removal on the acidic vanadium-containing solution, wherein the method comprises the following step: under the condition with a pH value of 2.5-3.5, carrying out a contact process on the acidic vanadium-containing solution, hydrogen peroxide and zirconium sulfate. According to the method for carrying out phosphorus removal on the acidic vanadium-containing solution disclosed by the invention, the allowed concentration range of the acidic vanadium-containing solution is large, and the phosphor removal can be effectively carried out on the acidic vanadium-containing solution; moreover, the vanadium loss is relatively small when the phosphor removal is carried out.

The invention relates to the field of wastewater treatment and especially relates to a method for utilizing a pre-depositing magnetic separation combined technology to treat municipal wastewater. The method comprises the following steps: pouring the wastewater into a pre-depositing system, primarily separating the wastewater from activated sludge and depositing 80-90% of activated sludge in the pre-depositing system; causing effluent to enter into a magnetic separation system; causing small sludge clusters in the wastewater to form micro-magnetic flocculation by adding micro-magnetic flocculation agent; utilizing a magnetic separation device to perform muddy water separation; and after disinfecting the effluent of the magnetic separation device, recycling or draining the effluent. The pre-depositing system is a manmade depositing system and comprises a water distributing unit, a depositing area, a sludge backflow area and a water draining unit. The method has the advantages of high separating speed, small floor space, strong resistance to an impact load, and the like.

The invention provides a nano-magnetic intelligent integrated water body remediation device. The nano-magnetic intelligent integrated water body remediation device comprises a sewage lifting pump, a flocculation mixing tank, a magnetic powder mixing tank, a PAM mixing tank, a sedimentation tank, a high-speed shearing machine, a magnetic separator and a micro-nano bubble machine; the flocculation mixing tank, the magnetic powder mixing tank and the PAM mixing tank are sequentially communicated with one another; the sedimentation tank is communicated with the outflow side of the PAM mixing tank;two water outflow pipelines are arranged at the upper part of the sedimentation tank; one path of outflow water enters the micro-nano bubble machine so as to perform oxygenation, and the other path of outflow water converges and returns to the upstream side or the far end of sewage, so that circulation is realized; a large sludge discharge pipeline and a small sludge discharge pipeline are arranged at the lower part of the sedimentation tank; sludge discharged from the larger sludge discharge pipeline reflows through a sludge reflux pump and enters the magnetic powder mixing tank; sludge discharged from the smaller sludge discharge pipeline enters the high-speed shearing machine through a residual sludge pump so as to be crushed; and the crushed sludge enters the magnetic separator so asto be subjected to sludge and magnetic powder separation, and the separated magnetic powder is recycled and injected into the magnetic powder mixing tank. The device can effectively improve the oxygenation efficiency of a water body and improve the water quality of the polluted water body.

The invention discloses Acinetobacter rhizosphaerae capable of efficiently removing phosphorus and application thereof, wherein the strain is preserved in the Guangdong Microbial Strain Culture Collection Center on September 28, 2017, and the culture preservation number of the strain is GDMCC NO:60246; the classification of the strain is names as Acinetobacter rhizosphaera; the preservation address is the fifth floor of the No.59 building of the N0.100 yard in Xianlie Central Road, Guangzhou, China. The strain has a good phosphorus removal effect, and the phosphorus removal rate can reach 95%at most after 24-hour anaerobic culture and 24-hour aerobic culture; when the strain is used for a biological phosphorus removal process, the phosphorus removal rate can be effectively increased, theeffluent quality is improved, and the strain has a great application prospect.

The invention discloses a microwave fluidized roasting-leaching method for reinforcing high phosphorous iron ore iron-extracting and phosphorus-reducing. The method is performed according to the following steps: (1) preparing high phosphorous iron ore as a raw material; (2) grinding the ore after crushing, to obtain iron ore powder; (3) sending to a microwave fluidized roasting furnace, and roasting in a reducing atmosphere condition; (4) after levigating the roasted ore, performing low intensity magnetic separation; (5) performing acid leaching dephosphorization by using sulfuric acid, afterthe acid leaching dephosphorization, filtering and separating a solid material; washing the solid material, and drying. The method is capable of realizing efficient comprehensive utilization of the high phosphorous iron ore, high in iron grade and recovery rate, remarkable in phosphorus-reducing effect. A technology is more energy-saving and cost-reducing, and the iron-extracting and phosphorus-reducing effect is more remarkable. Recycling and efficient development and utilization of high phosphorous oolitic hematite are realized.

The invention discloses a V-shaped filter tank for deep denitrogenation. The V-shaped filter tank comprises a V-shaped water inflow channel, a back washing drainage channel, a filter tank body, a back washing air inlet pipe, a back washing water inlet pipe and a water outlet pipe, wherein the water inflow channel is arranged at the top of the filter tank body; the filter tank body is filled with a filter material; the bottom of the filter tank body is filled with a bearing layer; filter plates and filter heads are mounted at the bottom of the filter tank body; the back washing air inlet pipe, the back washing water inlet pipe and the water outlet pipe are arranged at the bottom of the filter tank body. The V-shaped filter tank has the advantages that the water power load is low; the occupied area is small; the nitrogen and phosphorus removal effects are high; the suspended matter removing effect is high; the effluent quality is excellent; the running and the maintenance are simple.

The invention relates to a phosphorus removal process for industrial waste water. The process comprises the following steps of: (1) adjusting the pH value of industrial waste water to 1-3 and then gradually adding calcium hydroxide till the pH value is 6-8; and (2) centrifuging the waste water treated in the step (1), filtering to obtain a filtrate of which the phosphorus content is not more than0.05 ppm, and recycling a solid material. In the invention, on the basis of the conventional acid and alkali neutralizing phosphorus removal process, the acid and alkali neutralizing process is controlled strictly, and the phosphorus removal effect is very remarkable. Moreover, the phosphorus removal process has the advantages of low equipment installation and maintenance costs, low waste water treatment cost, and the like.

The invention discloses a high-efficiency compound phosphorus removal agent which consists of the following components in parts by mass: 80-100 parts of ferrous chloride, 20-50 parts of an antioxidant, 1-20 parts of a natural mineral powder, 10-20 parts of silica, 20-40 parts of a catalyst and 10-15 parts of a stabilizer. The high-efficiency compound phosphorus removal agent has obvious effect ofphosphorus removal, has the removal rate reaching 92% or more, has less drug dosage and relatively low treatment cost, has relatively strong purified water quality, has the ability to remove BOD, CODand heavy metal ions in water, and also has efficacies of decolorization, sulfur removal, oil removal, sludge dewatering and the like; a preparation process of the high-efficiency compound phosphorusremoval agent is simple; the price of the used ferrous chloride is low, byproducts of upstream industries can be used, and reduction of the cost of the compound phosphorus removal agent is facilitated.

The invention relates to a production technology for metallurgical silicon with low boron (B) content and low phosphorus (P) content. The technical scheme comprises the following steps of: selecting silica with silicon dioxide (SiO2) of over 99 percent, B of less than 10ppmw and P of less than 5ppmw and cracking the silica until the particle size of the silica ranges from 50 to 120 millimeters; cleaning the silica by using water and drying the cleaned silica in the air as raw silicon; selecting petroleum coke as a reducing agent; uniformly mixing the following compound additives in percentage by weight: 60 to 65 percent of CaF, 22 to 26 percent of CaO and 7 to 11 percent of Na2SiO3; weighing according to the weight ratio of the compound additives to the reducing agent to the silica of 1 to 4 to 10 respectively and mixing the compound additives, the reducing agent and the silica, feeding the mixture into an ore furnace and smelting at temperature of 2,000 to 2,400 DEG C for 4 to 5.5 hours, stopping heating for every 1.5 to 2 hours and ramming the furnace for three times; simultaneously discharging non-silicon substances and smelted metallurgical silicon liquid in the ore furnace, injecting the non-silicon substances and the smelted metallurgical silicon liquid into a silicon water bag and performing oxygen blowing to slowly increase air pressure until the liquid silicon mixtureis in a boiling state and keeping the boiling state for 35 to 50 minutes; and removing slag and directionally solidifying to obtain the high-quality metallurgical silicon.

The invention discloses a preparation method of a high-efficiency phosphorus-removal coagulant, comprising the following steps: 1) adding a certain volume of a nano AI13 solution (AI ion concentrationis 0.2 mol / L) to a container ; 2) under high shear condition, slowly and dropwise adding a certain volume of an organic coagulant aid solution to the container by using a constant-flow peristaltic pump, and then adding appropriate amount of deionized water to make the AI ion concentration be 0.1 mol / L; 3) after stirring for 24 h, obtaining the phosphorus-removal coagulant. According to the invention, the amount of the coagulant aid is appropriately increased, exertion of net trapping effect is facilitated while the adsorption bridging effect is strengthened. Coagulant aid molecules can make tiny colloids form large floccules to a certain extent, so the presence of the coagulant aid is beneficial to forming a high polymer with a spatial structure, increasing the particle size of flocs, andimproving the sedimentation effect, thereby achieving the good phosphorus-removal effect.

The invention discloses a microwave continuous suspension roasting method of enhancing high-phosphorus oolitic hematite foriron increase and phosphorus reduction. The microwave continuous suspension roasting method adopts a microwave continuous suspension roasting system and comprises the following steps that (1) the high-phosphorus oolitic hematite is crushed and finely ground into iron ore powder, and then the iron ore powder is poured into a feeding bin and is conveyed to a pretreatment fluidization device; (2) protective gas is introduced into a pretreatment feeding chamber and a pretreatment discharging chamber; (3) the iron ore powder is heated througha microwave cavity and then enters a reduction fluidization chamber; (4) the protective gas is introduced into a reduction feeding chamber and a reduction discharging chamber, and when thetemperature is lowered to 450-700 DEG C, reducing mixed gas is introduced into the reduction discharging chamber for reduction magnetization roasting, and a reduction material enters a cooler; and (5) the reduction material is cooled to thetemperature below 100 DEG C and enters a collection tank. By adopting the method disclosed by the invention, efficient and comprehensive utilization of high-phosphorus iron ores is realized, the iron grade and the recovery rate are high, and the phosphorus removal effect is remarkable; and resource and efficient development and utilization of the high-phosphorus oolitic hematite are realized.

The invention discloses an efficient composite phosphorus removal type farmland tail water treatment system, which comprises a vegetation layer, a coarse sand layer and a reinforced phosphorus removallayer which are sequentially arranged from top to bottom. The vegetation layer comprises culture soil and vegetation; the coarse sand layer is laid at the bottom of the culture soil; the reinforced phosphorus removal layer comprises a plurality of reinforced phosphorus removal geocontainers and zeolite filled among the reinforced phosphorus removal geocontainers; the reinforced phosphorus removalgeocontainers are lumps formed by mixing sandstone, zero-valent iron, zero-valent aluminum, activated carbon powder and an additive and then performing wrapping with geotextile; wherein the weight percentages of the sandstone, the zero-valent iron, the zero-valent aluminum, the activated carbon powder and the additive are 70-80%, 4-6%, 3-6%, 7-12% and 3-8% respectively; meanwhile, the preparationmethod of the farmland tail water treatment system is improved, the sandstone, zero-valent iron, zero-valent aluminum, activated carbon powder and the additive are mixed according to a certain proportion and then the mixture is coated with geotextile to prepare the reinforced phosphorus removal geocontainers, thus effectively reducing the phosphorus content, suspended matters and other pollutantsin sewage.

The invention provides an aluminum / cerium bimetal organic framework material, a preparation method and application of the aluminum / cerium bimetal organic framework material in adsorbing and removing phosphorus. According to the method, cerium salt, aluminum salt and terephthalic acid are used as raw materials, N, N-dimethylformamide is used as a solvent, and the aluminum / cerium bimetal organic framework material is synthesized through a one-step hydrothermal synthesis method. The aluminum / cerium double-metal organic framework material disclosed by the invention has a relatively large specific surface area and a moderate pore diameter, so that the removal of phosphate radicals in water is facilitated. Meanwhile, through ligand exchange and complexation between Al and Ce in the material and phosphate, the material has an excellent phosphorus removal effect. The aluminum / cerium bimetal organic framework material has high selectivity on phosphate, is suitable for treating phosphorus-containing wastewater containing various ions and natural organic matters under the coexistence condition, and has relatively high phosphorus removal efficiency. In addition, the aluminum / cerium bimetal organic framework material also has a wide pH application range, and can realize rapid and efficient removal of phosphate radicals in a water body, thereby having a wide application prospect.

The invention belongs to and relates to the field of waste water purification treatment, and particularly relates to a hydrophilic / hydrophobic sewage dephosphorization coagulant which is prepared through the following steps: (1) pretreatment of raw materials: grinding industrial residue used as a raw material into powder; (2) preparation of an active solution preparation: adding surfactant into 10-15% dilute sulfuric acid, wherein the surfactant accounts for 0-0.30% (volume percent) of the solution; and (3) activation of the raw material: mixing the pretreated raw material and the active solution according to a weight ratio of 1:2, stirring to react at 80-100 DEG C for 1.5-2 hours, performing vacuum drying on the material after reaction, grinding, and screening to obtain the hydrophilic / hydrophobic sewage dephosphorization coagulant. According to the invention, the obtained dephosphorization coagulant has favorable effect of removing phosphorus in sewage; the hydrophilicity / hydrophobicity of the coagulant can be regulated according to user demands; and the coagulant is simple in manufacturing method, low in synthesis cost and easy to realize industrial production. Thus, the recycling of solid waste is realized.

The invention discloses a method for photochemical degradation of phosphorous-containing wastewater, and aims to degrade organic matters and precipitate and remove phosphorus in phosphorus-containing wastewater. The method comprises the following steps: using peroxide as an oxidant, carbohydrate as an initiator, ferrous ion as a catalyst, ferrous ion complexing organic matter hydroxyacetic acid as a stabilizer, and soluble aluminum salt or calcium salt as a phosphate precipitant; and performing UV photo-oxidative degradation under a weak acidity condition of pH 2-6. In the method provided by the invention, the peroxide is decomposed through a UV-induced Fenton reaction to generate free radicals and the catalyst in a complexing state is used at the same time to eliminate the poisoning of phosphate radicals to the catalyst, thereby realizing the rapid degradation of high-concentration organic wastewater containing a large amount of phosphate radicals. The method has the advantages of simple steps, no need of heating or pressing, and easy control, uses the cheap stabilizer, realizes the degradation process under mild conditions, and is a phosphorus-containing wastewater degradation method featured with huge potential, environmental protection, high efficiency and economy.

The invention discloses a method for removing acidic phosphorus-containing wastewater by utilizing modified fluorgypsum and belongs to the technical field of fluorgypsum treatment. Waste fluorgypsum is crushed into powder, oxalic acid is added for soaking, titanium hydroxide is added after soaking, the mixture is stirred and filtered, sediments are obtained and then are dried and calcined, sodium hydroxide is added for soaking, sea salt is added, the mixture is left to stand, precipitates are generated and are finally, dried, calcined and cooled to the room temperature, and mixed phosphorous removal powder is obtained; during use, the prepared phosphorous removal powder is added to the acidic phosphorus-containing wastewater. Living examples prove that the method is simple and easy to operate, resources are sufficiently utilized, waste utilization is realized, the phosphorous removal effect is remarkable, and the phosphorous removal rate is higher than 90%.

The invention discloses a method for strengthening anaerobic organism phosphorus removal of waste water. The method comprises the following steps: adding exogenous medicaments such as Na2S2O5 and / or Na2SO3 into phosphorus-containing waste water, mixing uniformly, adjusting the pH value of the waste water to be 6.0 to 8.0, carrying out an anaerobic digestion reaction at the temperature of 15 to 45DEG C, releasing hydrogen phosphide from total phosphorus inside the waste water under the metabolism effect of anaerobic microorganisms so as to be removed from a water body, so that the load of thetotal phosphorus entering an aerobiotic stage in the waste water biochemical treatment system is obviously reduced. The method is simple and practicable, and is obvious in phosphorus removal effect.

The invention particularly relates to a bypass flow type biological phosphorus removal process. The process comprises the following steps: step 1, feeding sewage into an anoxic tank, and enabling thesewage to flow into an aerobic tank through the anoxic tank; 2, enabling a part of nitrification liquid mud water discharged from the aerobic tank to flow back to the anoxic tank again, and the otherpart of nitrification liquid mud water to flow into a secondary sedimentation tank; 3, after mud-water separation of nitrification liquid mud water in the secondary sedimentation tank, directly discharging supernatant out of the treatment system as effluent or subjected to advanced treatment, discharging a part of sludge, discharging another part of sludge out of the treatment system as excess sludge to realize biological phosphorus removal, and the other part of sludge respectively flows back to the anoxic tank and the bypass flow pre-anoxic tank according to a certain proportion; 4, uniformly mixing the sludge in the bypass flow pre-anoxic tank and then feeding the sludge into a bypass flow anaerobic tank, so that the sludge is subjected to deep fermentation in the bypass flow anaerobictank and then flows back to the anoxic tank. By means of the process, the dependence of phosphorus-accumulating bacteria on a water inlet carbon source is reduced, and more carbon sources can be obtained by denitrifying bacteria, so that an external commercial carbon source does not need to be added.

The invention provides a high-efficiency phosphorus removing flocculant for sewage. The high-efficiency phosphorus removing flocculant for the sewage comprises the following components in parts by weight: 10-20 parts of ferric chloride, 22-30 parts of ferrous sulfate, 5-8 parts of triethanolamine, 5-10 parts of hydrogen peroxide and 40-50 parts of deionized water, and the sum of the parts by weight is 100. The high-efficiency phosphorus removing flocculant for the sewage, provided by the invention, has strong adaptability, a wide application range and a superior phosphorus removing effect; a large amount of hydroxide floc precipitate produced during hydrolysis has very large specific surface area and adsorption capacity and has a very strong adsorptive effect on negatively charged phosphate, hydrogen phosphate and dihydrogen phosphate contained in the sewage; through adsorption and bridging, colloids in the sewage can be condensed together, so that the phosphorus removing efficiency isguaranteed; in addition, the product performance is stable.

The invention relates to a preparation method of a high-efficiency eutrophic water body phosphorus removal recoverable biological ceramsite and a method for recovering phosphorus from the ceramsite and regenerating the biological ceramsite. By taking dredged sediment and aquatic plant residues as raw materials and alternative clay as a raw material for ceramsite preparation, the high-efficiency eutrophic water body phosphorus removal recoverable biological ceramsite is prepared; the obtained high-efficiency eutrophic water body phosphorus removal recoverable biological ceramsite is significantin phosphorus removal effect, can be used for reducing or controlling the concentration of the phosphorus in a polluted water body and can be reused through regeneration.