560results about How to "Improve phosphorus removal effect" patented technology

An integrated bioreactor and its applications as well as a method for treatment of highly-concentrated organic wastewater using the same. The integrated bioreactor with a concentric columnar structure includes an inner layer and an outer layer, in which the inner layer is an upflow anaerobic sludge blanket (UASB) and the outer layer is a moving bed biofilm reactor (MBBR). The effluent of the MBBR is recycled into UASB via a reflux pump mounted between a water tank and the integrated bioreactor. A water outlet of the UASB is arranged with an on-line pH monitor and a mechanical agitation device is arranged on the top of a bottom water distributor. The bioreactor is low in cost, features friendly maintenance, stable operation, and high degree of automation, and can be applied under low temperature.

The invention provides a method for preparing efficient phosphorus removal biochar by shellfish waste. The method includes: (1), washing and drying shrimp and crab shells for standby application; (2), putting products obtained in the step (1) in a muffle furnace, and pyrolyzing the products at the high temperature of 300-900 DEG C under the nitrogen condition or oxygen limiting condition for 0.5-3 hours to obtain the biobar. The shrimp and crab shells include at least one of crab shells, shrimp shells or lobster shells. The obtained biochar has excellent phosphorus adsorption effect, and adsorbing capacity of the biochar to the phosphorus can reach 180mg/g; the obtained biochar also has excellent heavy metal removal capability; modification of the obtained biochar is not needed, preparation process is simple, raw materials are easy to obtain and cheap, and the biochar has quite broad market application prospect.

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 provides a dephosphorization and denitrification, mud decrement and phosphorus recovery integrated sewage treatment device and a method thereof. The method adopts processes of hydrolysis acidification, multilevel series contact aeration and dephosphorization and denitrification A<2>/O of continuous flow, and comprises the following steps that: a hydrolysis acidification unit is used to treat raw sewage and a little anaerobic phosphorus releasing sludge to realize conversion of VFA; clear solution rich in the VFA after hydrolyzed supplies rich carbon sources for a subsequent dephosphorization and denitrification A<2>/O unit to reinforce synchronous dephosphorization and denitrification; and low concentration phosphorus in the sewage is enriched in the anaerobic phosphorus releasing sewage by the excessive phosphorus absorption capability of a phosphate accumulating organism, and the minor part of phosphorus enriched sewage is drained to carry out chemical phosphorus solidification. The dephosphorization mode can significantly reduce sewage quantity of chemical dephosphorization, improve the utility ratio of a dephosphorizing medicament, reduce dosage of the medicament, has high phosphorous amount in the obtained chemical sludge, and realizes recycle of the middle and low concentration phosphorus in urban sewage by the mode of non residue sludge under a condition of low cost. Sludge decrement can be realized through biofacies separation of a multilevel series contact aeration tank and the function of microorganism predation grade by grade.

The invention relates to a phosphorus removing agent containing inorganic mineral and an application method thereof. The phosphorus removing agent contains 50-75% of an aluminium-containing compound, 15-30% of an inorganic mineral adsorbent and 10-20% of an iron-containing compound, and also can be compounded with a B component. By the use of the phosphorus removing agent, inorganic phosphorus and organic phosphorus in wastewater are removed effectively. By the addition of the inorganic mineral adsorbent, phosphates are fully adsorbed, and the inorganic mineral adsorbent can be combined with iron hydroxide and dried aluminium hydroxide gel generated during the reaction. Thus, more phosphates and pollutants in water can be adsorbed to form larger floc, and settling and flocculation processes are accelerated. Through the synergistic effect of substances, a better phosphorus removing effect is achieved. The phosphorus removing agent has a very good effect of processing orthophosphate, polyphosphates and organic phosphorus and especially has a function of efficiently removing organic phosphorus. In addition, the application method of the phosphorus removing agent is simple.

The invention discloses a denitrification dephosphorization device. The device comprises a tower body, wherein a lower cavity chamber, a bearing layer, a stuffing layer and an upper cavity chamber are sequentially arranged inside the tower body from bottom to top; the stuffing layer consists of sulfur and iron; the side wall of the lower cavity chamber is provided with a water inlet, and the side wall of the upper cavity chamber is provided with a water outlet; the iron is iron scraps, cast-iron scraps or sponge iron; and the sulfur is sulfur granules. The denitrification dephosphorization device has following beneficial effects that: a product hydrogen ion (H+) of the autotrophic denitrification reaction is released, so that the reaction activity of the iron scraps in a micro-environment is enhanced, and the dephosphorization effect is obvious; and meanwhile, the existence of the iron has a certain effect on removing the oxygen, promotes an anaerobic environment of a reactor, favors the singleness of the denitrification microorganism in the reactor and enhances the autotrophic denitration reaction. The device has low cost, stable denitrification dephosphorization effect and high removal rate, and is simple in structure and easy to operate, produce and use.

The invention relates to a high-efficient phosphate removing agent, which relates to the technical field of sewage treatment, and is prepared from the following components in percentage by mass: 30 percent to 70 percent of metallic compound, 10 percent to 20 percent of natural mineral powder,10 percent to 20 percent of flocculating agent,5 percent to 10 percent of activated carbon, and 5 percent to 10 percent of coagulant aid. According to the scheme, through providing the high-efficient phosphate removing agent, through a physics-chemistry combining method, and by utilizing cooperative interaction of the components, phosphorus in inorganic and organic phosphorus wastewater can be effectively removed; the high-efficient phosphate removing agent has the advantages of simplicity in preparation, convenience in use, low cost, less dosage, quickness in reaction, superior phosphate removing effect, wide applicable range, and the like.

The invention belongs to the technical field of preparation, regeneration or reactivation, and discloses a biomass carbon fiber/layered double metal hydroxide adsorption material for phosphorus removal. The material is composed of biomass carbon fiber and layered double metal hydroxide, the layered double metal hydroxide grows on the surface of the biomass carbon fiber in a crescent sheet shape, and the biomass carbon fiber is prepared by using the steps of: extracting cellulose from biomass, and then performing carbonization, wherein the biomass carbon fiber has a length of 50-1500 mum and adiameter of 5-20 mum, and the layered double metal hydroxide is two-dimensional sheet-shaped copper-aluminum bimetallic hydrotalcite hydroxide which has a sheet thickness of 100 nm-1 mum and a copper-aluminum molar ratio of (2:1)-(4:1). The material has a simple and controllable preparation process, and the adsorption performance is improved through a double adsorption effect of the biomass carbonfiber/LDH, so that the purpose of efficient and rapid removal is achieved, the removal rate is up to 99.5%; therefore, reliable theory and actual support are provided for practical application.

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 relates to a lanthanum-iron modified zeolite phosphorus removal adsorbent and a preparation method and application thereof. Natural zeolite is modified by lanthanum salt and iron salt. At first, a mixed solution of lanthanum and iron is prepared, and then zeolite is added, and that mixture is uniformly mixed, the pH of the solution is adjusted to be alkaline, and a precipitate of lanthanum and iron is formed, so that the precipitate is fully loaded on the surface of the zeolite. Aging, filtering, washing, drying and roasting are performed to obtain the adsorbent. The invention modifies the cheap natural zeolite, improves the phosphorus removal effect of the natural zeolite to a certain extent, and makes up for the defects of the natural zeolite in phosphorus removal.

The invention relates to an enhanced phosphorus removal and sludge reduction type sewage treatment process. The process includes that sewage enters a preposed sludge reduction unit, repeatedly backflows into a main reactor for treatment in reverse flow state and oblique diagonal mode and sequentially flows through an anaerobic area, an anoxic area and an aerobic area for biochemical reaction treatment, outgoing water enters a second setting tank for standing, sludge on the lower portion of the second setting tank backflows to the preposed sludge reduction unit through a sludge outer backflow pipe, and the sludge after being treated is discharged from a water outgoing pipe on the upper portion of the second setting tank; at the same time, clear liquid on the anaerobic area enters a side flow chemical crystallizing column for chemical crystallizing removal of phosphorus, and the clear liquid after phosphorus removal backflows to the anoxic area. A device adopted in the sewage treatment process is convenient to mount, simple and quick to operate, reliable and stable in performance, good in treatment effect and low in running cost. The flow state of the process is a mixed flow state, a bio-carrier is suspended filler and is needless to support and fix and convenient to use, and good sewage denitrification, phosphorus removal, phosphorus recycling and sludge reduction effects can be realized.

The invention relates to the sewage biochemical treatment and sewage resource utilization field, in particular to a method for the denitrifying phosphorus removal and denitrification of activated sludge in a composite biological film and a reactor thereof. Through forming four reaction tanks in an integrated reactor, namely an anoxic tank, an aerobic tank, a sediment tank and a sludge anaerobic tank, filling materials are respectively added in the anoxic tank and the aerobic tank; denitrifying phosphorus-accumulating bacteria is enriched by utilizing the special structure of the biological film; the contradiction of denitrification and the phosphorus removal on the competition of sludge ages and a carbon source in the traditional process is effectively overcome through the steps of anaerobic phosphorus release, denitrifying phosphorus removal, aerobic nitration, denitrifying phosphorous accumulation, and solid-liquid separation in the integrated reactor, so that the optimal effects of the denitrification and the phosphorus removal are achieved simultaneously; and the invention is particularly suitable for the treatment of municipal sewage with low carbon-nitrogen ratio, has optimal phosphorus removal effect, and is conductive to the recovery and the utilization of phosphorous.

The invention discloses a method for treating domestic sewage by applying a light ceramic suspended filler moving bed, which comprises the following steps of: pumping low-concentration town sewage into a hydrolytic acidification tank by using a lift pump, maintaining the sewage in the hydrolytic acidification tank for 3 to 8 hours, and controlling the dissolved oxygen to 0.38-0.45mg/L; making the sewage to enter a suspended filler moving bed; under the action of aeration stirring of an aerator pipe, mixing the sewage and a suspended ceramic filler, and breeding microorganisms on the surfaces and pores of the suspended ceramsites; after film formation, forming aerobic, anoxic and anaerobic environment on the surfaces and in the pores of the suspended ceramsites, adsorbing organic matters in the sewage on the surfaces of the suspended ceramsites, and performing simultaneous nitrification-denitrification and simultaneous decarbonization-denitrification on the organic matters by the microorganisms in the biofilm; and finally, making the sewage enter a dosing and coagulating basin, adding a coagulant into the dosing and coagulating basin, fully reacting, and making the sewage enter an inclined-tube sedimentation tank for sedimentation. The method has the characteristics of short hydraulic retention time, land conservation, investment conservation and low operating cost.

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 discloses a system and a method for treating sewage with biological phosphorus removal and bypath chemical phosphorus removal. The system comprises a nitrogen-phosphorus removal subsystem and a bypath phosphorus removal subsystem, wherein the nitrogen-phosphorus removal subsystem is formed by connecting an anaerobic tank, an anoxic tank, an aeration tank, a sedimentation tank, a sludge return tank and a sludge return pump in turn, wherein the water outlet of the sludge return tank is connected to a sewage inlet of the anaerobic tank through a sludge return pump via pipelines; the bypath phosphorus removal subsystem is formed by connecting a mixing tank, an anaerobic phosphorus release sedimentation tank, a mixing reaction tank and a second sedimentation tank in turn; and the water outlet of the sludge return tank of the nitrogen-phosphorus removal subsystem is communicated with the water inlet of the mixing tank through the sludge return pump. The treatment system is simple in structure, organically combines the biological phosphorus removal with the chemical phosphorus removal, effectively solves the disadvantages that the biological phosphorus removal is low in efficiency and the pure chemical phosphorus removal remains high in operation cost, and has the advantages of good phosphorus removal effect and less medicament cost than the pure chemical phosphorus removal.

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 relates to a method for dephosphorization in a municipal sewage plant, belonging to the water treatment field. In the method, a scrap iron packing layer is arranged in a hydrolysis and acidification pool (an adjusting pool, a catchment well, etc.) in the municipal sewage plant; with an anaerobic and acidic environment formed by sewage water in a structure, the internal electrolysis effect occurs in scrap iron to generate dephosphorization ions Fe<2+> which are oxidized into Fe <3+> in the subsequent aeration procedures; two kinds of ions and phosphor in the sewage water respectively generate Fe<3>(PO<4>)<2> precipitation and Fe PO <4> precipitation; and the sediment sinks, thereby achieving the aim of dephosphorization in the sewage water. A backflush pipe is arranged under the scrap iron packing layer. The method has low cost and operation expenses, does not need to change the prior flow of the sewage treatment plant, is simple and feasible, has the effects of internal electrolysis and flocculation, effectively dephosphorizes and has good synergistic effect on organic pollutant in the sewage water, good treatment effect and wide application prospect in the municipal domestic sewage treatment.

The invention discloses a reactor of integrative combination technique for treating city sewage.The reactor comprises an anaerobic zone (2), a hypoxia zone (5), an aerobic zone (7) and a precipitate zone (11); one of sludge return tube (13) and another sludge return tube (14) which are provided with valves are connected with the anaerobic zone (2) and the hypoxia zone (5) from the precipitate zone (11) respectively; one of mixture return pipe (16) and another mixture return pipe (17) which are provided with valves are connected to front of the hypoxia zone (5) and the anaerobic zone (2) from end of the aerobic zone (7) and end of the hypoxia zone (5) respectively.The invention runs two sewage treatment techniques alternatively in the integrative reactor, by arranging an anaerobic pool, a hypoxia pool and an aerobic pool in the integrative reactor, nitrogen and phosphorus removal can be realized efficiently and economically.And under requirements of different conditions, the two techniques are alternatively run and technology resource is integrated, which can realize high-efficient and economical life sewage treatment function.

The invention provides a preparation method of a flocculant capable of removing phosphate from red mud, belonging to a preparation process of a flocculant for feed water and waste water treatment and relating to the field of sewage treatment in environment conservation. The preparation method comprises the following steps: adding alumyte and red mud particles in industrial hydrochloric acid, and performing the steps of mixing, reacting, aging and the like, so as to obtain the flocculant capable of removing phosphate. The flocculant produced by the preparation method is good in stability, and is suitable for the purification treatment of feed water and waste water; the effect of the flocculant is superior to that of the common polyaluminium chloride; and the preparation method is simple, is easy to achieve industrial production and has a wide open application prospect.

The invention discloses a denitrification and dephosphorization filler for sewage and a preparation method thereof. The denitrification and dephosphorization filler for sewage comprises the followingcomponents in parts by weight: 30-50 parts of iron powder, 20-50 parts of carbon powder, 5-10 parts of bentonite, 15-30 parts of cement, 20-50 parts of modified charcoal and 20-40 parts of a solid carbon source. The preparation method comprises the following steps: preparation of the modified charcoal; preparation of the solid carbon source; mixing; granulating; and drying. The denitrification anddephosphorization filler for sewage has good nitrogen and phosphorus removal efficiency and a stable structure; and the preparation method is simple and has low cost, and the prepared filler has goodapplication prospects.

The invention provides a method for using artificial wetlands for processing the waste water in circular seaculture, which comprises the following steps: the waste water is first filtered by a microstrainer and then led to an artificial wetland for treatment; the artificial wetland is in the form of a horizontal undercurrent packed bed and is divided into a front anaerobic zone and a back aerobic zone, the surface area ratio of which is 1-2:4-3, no plants are in the filler of the anaerobic zone while salt tolerant plants are planted in the filler of the aerobic zone; the effluent from the microstrainer sequentially flows through the anaerobic zone and the aerobic zone to be discharged, and the water flowing to the anaerobic zone contains the water flowing out of the aerobic zone. The artificial wetland provided by the invention is capable of seawater processing, denitrification, denitrogenation and dephosphorization, and can effectively process the suspended matters, organic matters, nitrogen, phosphorus and the like in the sewage flowing through the artificial wetland in multiple ways and cause the effluent quality to reach the water quality standard requirements of fishery industry of China, thus realizing the aim of recycling the effluent. Compared with the prior art, the invention has the advantages of good treatment effect, low cost and environment protection but no pollution.

The invention discloses porous nitrogen and phosphorus removal filler for an artificial wetland and a preparation method of the porous nitrogen and phosphorus removal filler. The preparation method comprises the following steps: uniformly stirring sands, Yunnan red soil, cement, quick lime, gypsum and water which are metered in proportion by weight to prepare mixed slurry and putting the mixed slurry into a pouring stirrer; preparing aluminum powder into a suspension liquid and putting the suspension liquid into the stirrer before being poured; discharging and pouring a material by the pouring stirrer into a die to prepare a blank; foaming and initially setting the poured blank at 50-70 DEG C for 1.5-2 hours to obtain coarse filler; standing the coarse filler for initial maintaining until the coarse filler has cutting strength and cutting the coarse filler; and autoclaving the cut coarse filler to obtain the porous nitrogen and phosphorus removal filler. The filler disclosed by the invention is used for sewage treatment, is light in volume-weight, stable in chemical property, liable to biofilm culturing, great in porosity and high in mechanical strength, and has an excellent phosphorus removal property and a relatively good ammonia nitrogen removing effect.

The invention discloses an AAO (Anaerobic-Anoxic-Oxic)-biological contact oxidation strengthened denitrification and dephosphorization device and a real-time control method of low C/N sewage treatment. The system is mainly composed of a raw water tank, an AAO reactor, an intermediate sedimentation tank, a biological contact oxidation tank, a settling zone, a discharged water tank, an online control box and a computer. The real-time control method is as follows: a DO sensor online collects concentrations of dissolved oxygen in grid cells of the biological contact oxidation tank, and the computer calculates and outputs the concentrations to control the nitrification process; a NH<4+> sensor, a NO<3-> sensor, a NO<2-> sensor and a TP sensor online collect the concentrations of ammonia nitrogen, nitrate, nitrite and total phosphorus in the discharged water tank, and the computer calculates and outputs according to the signals collected by the sensors to adjust the aeration amount, the reflux ratio of nitrifying liquid and water intake C/N. By adopting the online real-time control equipment, the system operation is optimized, the energy is saved, the consumption is reduced, the carbon source and the aeration amount are saved and the residual sludge is reduced.

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 discloses a method for preparing a compound adsorbent by utilizing agricultural wastes in the field of environmental protection, which comprises the following steps of: 1, taking the agricultural wastes, then placing the agricultural wastes into aqueous solution of soluble calcium salt, performing vacuum impregnation, filtering the obtained solution, and drying a precipitate to obtain a solid substance; and 2, placing the solid substance obtained in the step one into solution, performing vacuum impregnation, filtering the obtained solution, drying a precipitate, and performing high-temperature sintering on the precipitate in vacuum to obtain the compound adsorbent, wherein the solution is aqueous solution of strong base of monovalent metal, aqueous solution of carbonate of the monovalent metal or aqueous solution of strong acid salt of zinc. The method has the advantages of low cost and simple process; and the prepared compound adsorbent is good in phosphorus removal effect, quick in speed and environment-friendly.