53results about How to "To achieve the purpose of phosphorus removal" patented technology

The invention discloses equipment of processing incorporate urban sewage and its technics. The equipment is made of armor plate. It includes internal electrolysis reaction area, machine-adding mixing system, helix flocculation depressed area and biolobical reaction area. Sewage can reach GB8978-1996 discharging standard through internal electrolysis reaction, flocculating settling (to remove phosphor), aerobic biological reaction, anaerobic reaction and filtration. Adopting incorporate treatment technics, the invention has a little floor space, low investment and a good effect. It adapts to urban subzones, blocks in villages and towns and micromidi companies such as urban diet, food processing and abattoir.

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 provides a recyclable waste water dephosphorization material of oyster shells prepared by a fire-free method and a preparation method thereof, belonging to a recyclable waste water dephosphorization ecological environment material, and solving the technical problems of unreasonable utilization of the oyster shells, incomplete dephosphorization in the waste water, high cost, complex process and the like in the prior art. In the invention, calcium resources in the oyster shells are fully utilized, pre-processed oyster shells and concrete are uniformly mixed according to a proper proportion, molding is carried out, and then the waste water dephosphorization material is prepared through the fire-free method. The invention has simple formulation and process, low cost, strong dephosphorization ability and high intensity, can be recycled, and then solves the difficult technical problem restricting the recycle and regeneration of the dephosphorization material and has very strong market competition and promotion application value.

The invention discloses a treatment method of heavy metal wastewater. The treatment method of heavy metal wastewater comprises the following steps of: delivering heavy metal wastewater supernatant liquor subjected to pretreatment into an A3O biochemical reaction system comprising a hydrolytic acidification reaction tank, an oxygen-poor denitrification reaction tank, an oxygen-poor dephosphorization reaction tank and an activated sludge tank; delivering effluent into a heavy metal membrane reactor, adding obligate bacteria for degrading organic matters in the reactor; and refluxing the wastewater in the heavy metal membrane reactor at intervals into the oxygen-poor dephosphorization reaction tank. According to the treatment method, the A2O biochemical treatment process is replaced by the A3O biochemical treatment process, the reflux ratio is adjusted, and the effects of reducing chemical oxygen demand (COD) of the biochemical system, adsorbing heavy metal, denitrifying and dephosphorizing without increasing the hydraulic retention time, the tank volume and the project cost are strengthened; and besides, a secondary sedimentation tank is replaced by M-MBR, the concentration of activated sludge and the biochemical reaction rate are improved, the COD and BOD are further reduced, and the equipment and process are simple. The treatment method can be popularized and applied on a large scale.

The invention provides desulfurized ash slag waste water dephosphorization materials prepared by a baking-free method and a preparation method, belonging to recyclable wastewater dephosphorization ecology environment materials. The invention solves the technical problems of the unreasonable use of desulfurized ash slag, incomplete phosphorus removal in the wastewater, high cost, complex technicalflow, and the like, in the prior art. The method comprises the steps of: completely using abundant calcium resources in the desulfurized ash slag; evenly mixing the processed desulfurized ash slag with cement according to proper proportion; shaping; and maintaining to be the wastewater dephosphorization materials in a baking-free way. The invention has simple product prescription and technology, low cost, strong dephosphorization capability and high product intensity, is recyclable, solves the technical difficulty in restricting the recycle of the dephosphorization materials, and has strong market competitive capacity and wide popularization and application value.

The invention discloses a sodium alginate embedded novel iron carbon-medical stone efficient phosphorus removal particle, and also discloses a preparation method of the phosphorus removal particle. The phosphorus removal particle comprises 1-3 g of medical stone, 1-3 g of activated carbon, 1-4 g of sodium alginate, 3-5 g of iron powder, 290-310 mL of deionized water and 10-25 g of calcium chloride. The phosphorus removal particle not only can overcome the defects that iron, carbon and medical stone are easy to migrate along with water flow, iron powder is easy to agglomerate, the phosphorus removal effect in the early stage of iron-carbon filler is slow and the like when being independently used as carrier filler, but also can give full play to various effects such as electrochemistry, physical adsorption, chemical flocculation precipitation and the like so as to achieve the purpose of phosphorus removal. Besides, the sodium alginate embedded novel iron carbon-medical stone efficient phosphorus removal particles prepared by the invention do not need to add a pore forming agent or high-temperature roasting, are simple and convenient in preparation method, have the advantages of lowenergy consumption, good treatment effect, wide application range, low cost and the like, and have relatively high research value and unique application advantages.

The invention discloses a sewage treatment system, and relates to the technical field of sewage treatment. The system mainly includes a sewage pool, a coarse grid, a grit chamber, a primary sedimentation tank, an adjustment tank, a flocculation tank, a secondary sedimentation tank, an anaerobic tank, an aerobic tank, an anoxic tank, a filtering device and an ecological filter tank, a flocculatingagent is added into the flocculation tank, and the flocculating agent comprises, by weight, 20-45 parts of lignin, 3-7 parts of trioxymethylene, 12-18 parts of triethylenetetramine, 2.5-3 parts of sodium hydroxymethanesulfonate, 6-9 parts of isobutanol, 11-17 parts of 2,3-epoxypropyltrimethylammonium chloride, 5-8 parts of aluminum sulfate, 2.5-3.8 parts of ferrous sulfate, 6-9 parts of zinc chloride and 16-20 parts of polyacrylamide. The system solves the problems of long acting time and poor removal effect of the flocculating agent, and reaches the advantages of fast action and good removaleffect of the flocculating agent.

The invention provides a method for removing phosphorus in phosphorus containing wastewater .Firstly, the pH value of the phosphorus containing wastewater is regulated to be 6-9, at this time, phosphate mainly exists in the form of dihydrogen phosphate and hydrogen phosphate, and then ferric trichloride is added for hydrolysis to form a ferrous hydroxyl compound; hydrolysate and phosphate form colloids, then aluminum polychlorid is added, the colloids formed by phosphate and iron in the wastewater form sediment by means of adsorption, bridging, sweeping and other actions and are removed out of the wastewater, and the purpose of removing phosphorus is achieved .According to the technology, by analyzing the existing state of phosphate in the wastewater, adding different chemicals and controlling operation parameters, phosphate in the wastewater is made to generate the colloidal state substances, and then the colloids are removed out of the wastewater by means of flocculent settling, so that the phosphorus content in the wastewater is reduced to be below 0.5 mg/L and within the range of 0.3-0.4 mg/L generally.

The invention provides modified ceramsite capable of efficiently removing phosphorus and preparation method of modified ceramsite. The modified ceramsite is prepared by taking papermaking white mud and fly ash as main raw material, and is prepared from, by weight, 40-60% of papermaking white mud and 40-60 wt% of fly ash. The preparation method comprises the following steps: (1) taking papermakingwhite mud and fly ash as main raw materials, uniformly mixing the main raw materials according to a ratio, and preparing green pellets with the particle size controllable in a range of 2-20mm by usinga centrifugal ball forming machine; (2) naturally curing the green pellets prepared in the step (1) for 20-24 hours, drying at 105 DEG C, and finally calcining to obtain ceramsite; (3) putting the ceramsite obtained in the step (2) into a KH2PO4 solution with the total phosphorus concentration of 15-20mg/L, statically adsorbing until saturation, and taking out; and (4) drying the ceramsite subjected to adsorption saturation at 105 DEG C for 1-2 hours, and calcining in a sintering furnace to obtain the modified ceramsite capable of efficiently removing phosphorus. The ceramsite prepared by theinvention has alkali supply and calcium release capabilities before and after modification, and can achieve the purpose of phosphorus removal. The modified ceramsite prepared by the invention is highin speed, large in adsorption capacity and remarkable in effect when used for adsorbing and removing phosphorus.

The invention discloses a peracetic acid wastewater treatment system. The system comprises a reaction tank body, a pH value adjuster having a pH value probe and an automatic reducer adding device having an oxidation reduction potential probe, wherein the reaction tank body is divided into a catalytic deoxidization chamber, a chemical reduction chamber and a coagulation-precipitation chamber via a plurality of baffle plates, and the catalytic deoxidization chamber, the chemical reduction chamber and the coagulation-precipitation chamber are communicated in sequence; a water inlet and a water outlet are arranged on the reaction tank body; the water inlet is formed in the side wall of the upper part of the catalytic deoxidization chamber, and the water outlet is formed in the side wall of the upper part of the coagulation-precipitation chamber; a plurality of catalytic filler layers are arranged in the catalytic deoxidization chamber; a liquid outlet of the pH value adjuster is communicated with the catalytic deoxidization chamber; a liquid outlet of the automatic reducer adding device is communicated with the chemical reduction chamber; and both the pH value probe and the oxidation reduction potential probe stretch into the chemical reduction chamber. According to the peracetic acid wastewater treatment system, the strong oxidizing property in peracetic acid wastewater can be reduced, so that the microorganism killing capacity of the peracetic acid wastewater is reduced and the damage from peracetic acid in the wastewater on microorganisms in an anaerobic system or an aerobic system is avoided.

The invention belongs to the technical field of sludge processing and particularly relates to a reduction processing device and method for residual activated sludge. A specific processing device and processing method are adopted for the device and method, the residual activated sludge is processed in a multi-period pressure cyclic change mode, the oxygen transferring and utilizing efficiency is greatly improved, the degrading speed of organic matter is increased, and therefore a higher reaction rate and higher removing efficiency are achieved; the processed sludge is discharged when pressure in a biological reactor is P, scum and water can be fast and efficiently separated, the phosphorus removal step is used in an assisting mode in the processing process, insoluble phosphate and the scum can float up together to be discharged, and therefore the purpose of removing phosphorus is achieved.

The invention discloses an A3O industrial wastewater biochemical treatment technology and an apparatus thereof. The A3O industrial wastewater biochemical treatment technology comprises the following steps: 1, injecting sewage having a pH value of 8-9 to a hydrolysis acidifying reaction tank, and allowing the sewage to sequentially flow through an anoxic denitrification reaction tank, an anoxic dephosphorization reaction tank and an activated sludge reaction tank; 2, returning sludge in the anoxic dephosphorization reaction tank to the hydrolysis acidifying reaction tank; 3, returning sludge in the activated sludge reaction tank to the anoxic denitrification reaction tank; and 4, returning sludge in the activated sludge reaction tank to the anoxic dephosphorization reaction tank, and discharging the sludge. The reflux ratio of the sludge is adjusted on the premise that the hydraulic retention time is not increased, the volumes of the above tanks are not enlarged and the engineering cost is not increased in order to reach COD reduction, denitrification and dephosphorization efficacies of a biochemical system, and make the ammonia nitrogen and total phosphorus in outlet water reach the first level standards of Integrated Wastewater Discharge Standard (GB8978-1996).

The invention discloses a method for alkali leaching dephosphorization of phosphorus-containing iron ore, and belongs to the technical field of the dephosphorization of the phosphorus-containing ironore. The method comprises the steps that the phosphorus-containing iron ore is crushed and finely ground, and the finely-ground phosphorus-containing iron ore or high-phosphorus iron ore concentrate and a certain concentration of alkali leaching solution are mixed, stirred and leached. Qualified dephosphorized iron ore or iron ore concentrate is prepared after solid-liquid separation. The leachingsolution is evaporated and then cooled to form a sodium phosphate coarse salt separated by crystallization. A dephosphorization high aluminum solution of partial of the coarse sodium phosphate is evaporated and passed into CO2, the composition content of Al2O3 and Na2O of the solution is adjusted, an aluminum hydroxide is prepared by seed precipitation, and the aluminum hydroxide is calcined to prepare an aluminum oxide. According to the method for alkali leaching dephosphorization of the phosphorus-containing iron ore, the recycling of alkali liquor can be realized while the by-product aluminum oxide and sodium phosphate products are produced, and technical support can be provided for the low cost and high value utilization of the phosphorus-containing iron ore or the high-phosphorus iron ore concentrate.

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 mainly relates to the field of water pollution treatment and control and relates to a lanthanum-supported coating material and phosphorus-fixing material to control lake eutrophication,their preparation methods, a phosphorus-fixing method and a phosphorus-fixing grid plate. In the preparation of the lanthanum-supported coating material, acetic acid is added to chitosan such that thechitosan is fully dissolved to obtain solution 1; lanthanum nitrate solution is added to the solution 1 to obtain solution 2 after full dispersion; ammonia water is added to the solution 2 such thatcolloid is separated out from the solution 2, and the separated colloid is the lanthanum-supported coating material. The lanthanum-supported coating material prepared herein can react with phosphatesand convert them into LaPO4, thereby arriving at phosphorus fixation; the preparation method of the lanthanum-supported coating material is simple and handy.

The invention discloses a circulating biological selection reactor for livestock and poultry culture sewage treatment. The reactor is mainly composed of a gas outlet, a reactor body, a water inlet, a sewage collecting pool and a water outlet, livestock and poultry culture sewage enters an anaerobic zone 1 through the water inlet and undergoes anaerobic denitrification, sludge in an incremental portion directly falls into the sewage collecting pool, anaerobic sewage overflows an overflow external plate, overflowed sewage is directly introduced to a biological selection zone 1 through a pipeline and undergoes biological adaptation, obtained sewage enters a biological aerobic zone 1 and undergoes selective biological aeration treatment, a nitration solution directly enters an anaerobic zone 2 and undergoes denitrification, cycle treatment is carried out, a gas is discharged from the gas outlet, sewage obtained after biological aerobic zone 3 treatment goes through a water fender, obtained water is drained from the water outlet, and sludge in the sludge collecting pool is discharged through a sludge pump. The reactor has the advantages of no refluxing of sludge or the nitration solution, realization of phosphorus removal through repeated anaerobic and aerobic treatment of sludge, direct falling of incremental and residual sludge to bottom without sludge discharge, and realization of thorough separation of three phases positioned in different directions.

The invention relates to a nitrogen and phosphorus removal composite filler which comprises lignocellulose, a metal substance, oligosaccharide and a biological enzyme. The invention relates to a purification device which comprises a treatment tank and a composite filler, wherein the composite filler is applied to a suspended type or a fixed type in a purification tank. When the composite filler is suspended, the composite filler can be prepared into a spherical shape; when the composite filler is fixed, the composite filler can be prepared into a square shape. Lignocellulose is used as a slow-release carbon source and a biofilm formation carrier, provides a carbon source as an electron donor for denitrification of denitrifying bacteria, reduces nitrate nitrogen into nitrogen, and realizes sewage denitrification; metal substances can reduce the oxidation-reduction potential of a water body so as to facilitate survival of denitrifying bacteria, stimulate microbial evolution to increase the diversity, strengthen microbial aggregation to increase the biomass and improve the biodegradability, and phosphorus in sewage can be removed through adsorption and precipitation of metal ions; the nitrogen and phosphorus removal composite filler is mainly used for efficient nitrogen removal of domestic sewage, river and lake water bodies, aquaculture wastewater and the like, and has a certain phosphorus removal function.

The invention relates to an integrative three-bent tridimensional cyclic oxidation ditch, which comprises an oxidation ditch, a solid-liquid separator and an aeration rotary brush. The upper part of the oxidation ditch is provided with a water inlet, and the aeration rotary brush is arranged in front of the water inlet. The integrative three-bent tridimensional cyclic oxidation ditch is characterized in that the solid-liquid separator is arranged at the side of the oxidation ditch; two partition boards are arranged in the oxidation ditch to divide the oxidation ditch into an upper aerobic zone, a middle anoxic zone and a lower anaerobic zone as three communicated chambers; and the bottom of the solid-liquid separator is communicated with the lower anaerobic zone, and the upper part of the solid-liquid separator is provided with a water outlet. The ditch has the advantages of compact structure, simple construction and stable and reliable treating effect; compared with the prior oxidation ditch, the occupied area can be reduced by 66 percent; and the ditch is particular suitable for domestic sewage treatment for countryside scattered residential areas, army camps, docks, and the like.

The invention relates to the technical field of sewage treatment, and particularly relates to a biological carrier for riverway purification treatment and a preparation method of the biological carrier. The biological carrier is prepared from bacillus, saccharomycetes, nitrifying bacteria, paracoccus denitrificans, stearic acid, glucose, calcium carbonate and hollow glass beads. The preparation method comprises the step of mixing the raw materials. The biological carrier for riverway purification treatment can effectively inhibit proliferation of algae in a water body so as to achieve a good sewage treatment effect.

The invention discloses a landscape type water ecological purification system, belonging to the technical field of garden design. The invention aims to provide the landscape type water ecological purification system for improving the ecological environment of a water body. Main points of a technical scheme of the invention are as follows: the landscape type water ecological purification system comprises an ecological floating bed area and an underwater aeration area, wherein the ecological floating bed area is composed of a plurality of ecological floating beds; the underwater aeration area comprises a submersible aerator and a power generation device used for generating power; the submersible aerator comprises a submersible pump; the inlet of the submersible pump is connected with an airinlet pipe; the outlet of the submersible pump is connected with an aeration disc; and at least one aeration opening is arranged at the edge of the aeration disc. According to the invention, the waterbody is purified through combination of aquatic plants and an aerator; and the quality of the water body is improved.