35results about How to "To achieve the purpose of nitrogen and phosphorus removal" patented technology

The invention provides a construction method of a two-phase bioretention pond with a synchronous phosphorous and nitrogen removal function. The construction method includes screening of filler and setting of a two-phase reaction area. Filler high in total phosphorous adsorption efficiency is screened according to filler characteristic and adsorption experiment, the two-phase reaction area containing the filler comprises an aerobic reaction area used for removing phosphorus, ammonia nitrogen and organic nitrogen and an anoxia reaction area used for removing nitrate, water with known nitrogen and phosphorous content is injected from the upper side of the bioretention pond, and influences on nitrogen and phosphorous effect from altitude of the anoxia reaction area are shown by measuring nitrogen and phosphorous content in water samples from water outlets of different altitudes. In order to solve the existing problems of the bioretention pond, runoff nitrogen and phosphorous removal effect of bioretention is synchronously improved by reinforcing denitrification and filler adsorption in the bioretention pond. The construction method is applied to rainwater treatment of overland runoff of roads and city open spaces and construction roofs.

The invention belongs to the technical field of environmental protection, and particularly relates to a preparation method of an algae biofilm and application thereof in sewage treatment. The preparation method specifically comprises the steps of carrier pretreating, algae culturing, algae domesticating and algae biofilm preparing. The preparation method of the algae biofilm has the advantages that the preparation cost is low, the raw materials are easy to obtain, and the algae biomass is easy to recycle; the prepared algae biofilm can achieve the efficient nitrogen and phosphorus removal effect in sewage treatment, achieves the purpose of general sewage treatment and not only can overcome the defects that in a suspended algae system, the algae density is low, the hydraulic retention time is long, algae and water are difficult to separate, too more suspended solids (SS) exist, the resource recycling rate is low but also has the advantages of reducing immobilization reagent cost, weakening the influences of immobilization reagents on the algae activity, reusing immobilization carriers and the like.

The invention relates to the field of sewage reuse, and particularly relates to an integrated MBR (Membrane Bio-Reactor). The integrated MBR is divided into an anoxic area and an aerobic area by using a baffle structure, carbon fiber packing is hung in the anoxic area, and an aeration device and a membrane assembly are placed in the aerobic area; the volume ratio of the anoxic area to the aerobic area is 1:3. The integrated MBR has the characteristics that due to the adoption of an integrated reaction device, the mode of multi-section processing in a single biochemical environment is solved, and the land-occupied area is saved; according to the structure characteristics, sewage circularly flows between the anoxic area and the aerobic area under the action of aeration, and shows different water flow characteristics; the device can simultaneously and effectively perform nitrification and denitrification processes, so that the sludge return is saved, thereby reducing the capital expenditure and the operation cost, and under the condition that the overall sludge concentration is not changed, the sludge concentration of the anoxic area is increased, and the sludge concentration of the aerobic area is reduced, thereby effectively reducing the membrane pollution; a carbon source required by denitrification is supplemented in a mode of feeding water from the anoxic area, thereby saving the cost.

The invention discloses an AABR (Anaerobic Baffled Reactor)-compound type MBR (Membrane Biological Reactor) integrated device and a method for treating organic wastewater. In order to realize standard-reaching treatment of organic wastewater with middle and high concentrations, the integrated device comprises a compound type MBR reaction tank provided with fillers and an MBR membrane assembly; the water outlet end of the compound type MBR reaction tank is communicated with a water production tank; the water inlet side of the compound type MBR reaction tank is provided with an AABR reaction tank communicated with a water inlet pipe; the AABR reaction tank comprises an anoxic section and multi-grade anaerobic tanks; the anoxic section and the multi-grade anaerobic tanks are internally provided with vertically-arranged baffle plates; the mud outlet end of the compound type MBR reaction tank is communicated with the anoxic section and a first-grade anaerobic tank respectively; the water inlet pipe is communicated with the anoxic section and the first-grade anaerobic tank in the multi-grade anaerobic tanks of the AABR reaction tank respectively. According to the AABR-compound type MBR integrated device, an ABR (Aerobic Baffled Reactor) is improved into an AABR and a form of a reversed A/A/O (Anaerobic/Anoxic/Oxic) nitrogen and phosphorus removal process is composed of the AABR and the compound type MBR reaction tank, so that organic matters with the middle and high concentrations are degraded and the nitrogen and phosphorus removal is also realized.

The invention discloses a multifunctional nitrogen and phosphorus removing agent as well as a preparation method and an application thereof. The preparation method of the multifunctional nitrogen and phosphorus removing agent comprises steps as follows: nano Fe3O4 is prepared from ferric chloride and ferrous sulfate with a coprecipitation method, an inorganic polymeric flocculant is deposited on the surface of nano Fe3O4 with a deposition process or an organic polymeric flocculant is deposited on the surface of nano Fe3O4 with an in-situ polymerization method, a nano Fe3O4/polymeric flocculant composite material is obtained and supported with microbial strains, and the multifunctional nitrogen and phosphorus removing agent is obtained. The agent has quite strong capacity of molecular bonding capture, flocculating settling, biodegradation and adsorption, can synergistically remove nitrogen and phosphorus compounds, organic matter and heavy metal such as Pb(II), Cd(II), Mn(II), Cr(III) and the like in a water body, is low in sludge yield, can rapidly realize solid-liquid separation under the action of external magnetic field force without secondary pollution, is environment-friendly and has good application prospect.

The invention discloses a sewage continuous drainage interval activated sludge process disposal technology. The sewage enters a catch pit and a grille pool from the pipe network collection and stay. An overflow pipe is near the catch pit. The garbage is intercepted by a buried grille pool and conducts sand setting and reducing processing via a digestive and adjustive pool functioning as adjusting the water volume, acidification and hydrolysis, and finally enters the sewage continuous drainage interval activated sludge process (XUCE) biochemical pool. The buried grille pool has four lattices and works alternatively to reach the aim of phosphorus and nitrogen removal, and removes various contaminations to make the sewage drained reaching the standard or reuse after through the disposal technology. The XUCE disposal technology is advanced, free from noise and smell, convenient in management, low in operation cost and easy in maintenance.

The invention relates to a mariculture wastewater treatment system and treatment method. The mariculture wastewater treatment system comprises a slanting board sedimentation pool and a three-section nitrogen and phosphorus removal pool which communicate with each other, wherein the three-zone nitrogen and phosphorus removal pool comprises a water distribution area, an anoxic zone, an aerobic zone, a phosphorous removal zone and a water collection area which are arranged in sequence, the anoxic zone is filled with gravel substrates, the aerobic zone is filled with zeolite substrates and equipped with a perforated aerator pipe, the phosphorous removal zone is filled with phosphorous removal functional filler substrates, a water inlet pipeline is arranged at the bottom end of the slanting board sedimentation pool, the top end of the slanting board sedimentation pool communicates with the water distribution area, the water collection area is equipped with a water outlet pipeline, and a return pipeline is arranged between the water collection area and the water distribution area, so that part of treated water is conveyed back to the water distribution area through the return pipeline. Compared with the prior art, the turbidity and the content of soluble COD, nitrogen and phosphorus in water can be reduced simultaneously, an A/O biological contact oxidation technology and an adsorption phosphorous removal technology are combined creatively to be applied to the field of seawater treatment, and the problem about large-scale purified emission of mariculture wastewater is solved.

The invention relates to a fracturing flowback fluid biological processing method based on a BESI technology, and aims to solve the problems that in the prior art, the process cost is high, and the oil content of effluent is high. The method comprises the following steps: step one, introducing fracturing flowback fluid into an anaerobic reaction device (2) through a sewage intake pump to carry out a treatment, wherein the HRT (hydraulic retention time) is 20 to 28 hours; step two, introducing the fracturing flowback fluid processed in the step one into a facultative anaerobic reaction device (3), wherein the HRT is 20 to 28 hours; step three, introducing the fracturing flowback fluid processed in the step two into an aerobic reaction device (4), wherein the HRT is 44 to 52 hours; step four, directly discharging part of fracturing flowback fluid processed in the step three from a discharging pipe, and returning residual fracturing flowback fluid to the facultative anaerobic reaction device (3), wherein the volume ratio of two parts is 1:1. The provided method is applied to the field of biological processing of fracturing flowback fluid.

The invention discloses a fracturing flowback fluid biological treatment method based on BESI, aerobiotic suspended packing and a single-hole membrane method, relates to the field of oilfield sewage treatment, and aims at solving the problems that in an existing fracturing flowback fluid treatment method, the effluent quality is not high, a membrane is polluted, and the treatment cost is high. The fracturing flowback fluid biological treatment method based on the BESI, the aerobiotic suspended packing and the single-hole membrane method comprises the following steps that 1, fracturing flowback fluid is treated in an anaerobic reaction device; 2, the fracturing flowback fluid is treated in a facultative anaerobic reaction device; 3, the fracturing flowback fluid is treated in an aerobiotic reaction device; 4, part of treated water is drained to a drain pipe from a water outlet of a single-hole membrane assembly through a peristaltic pump, and the other part of the treated water returns into the facultative anaerobic reaction device. The method is suitable for the field of oilfield sewage treatment and particularly suitable for fracturing flowback fluid treatment.

The invention provides multi-grade AO sewage treatment equipment with a strengthened denitrification and phosphorous removal function. The multi-grade AO sewage treatment equipment comprises a pre-positioned oxygen-deficiency and anaerobic sedimentation tank, at least two aerobic and oxygen-deficiency sedimentation tanks and a sediment clarification tank; an oxygen-deficiency region, an anaerobicsedimentation region, an aerobic aeration region, an oxygen-deficiency sedimentation region, an Nth aerobic aeration region, an Nth anaerobic sedimentation region and a final sediment clarification region are sequentially arranged along the water flow direction from upstream to downstream; three-dimensional biological rope filler is arranged in the oxygen-deficiency region and the aerobic aerationregion; activated sludge layers are deposited in the anaerobic sedimentation region and the oxygen-deficiency sedimentation region; inclined tube filler is arranged in the sediment clarification tankand water flow is controlled to flow along a snake-shaped path; the contact area of sewage, the three-dimensional biological rope filler, activated sludge and the inclined tube filler is enlarged andthe contact time is prolonged, so that the sewage treatment effect is remarkably improved, and requirements of economic society and the improvement of science and technology on sewage treatment are basically met.

The invention relates to the field of sewage treatment, in particular to an MBR (Membrane Bioreactor) sewage treatment system which comprises a regulating tank, an anoxic tank and an MBR membrane tank which are arranged in sequence, the sewage conveying pump can supply water to the adjusting tank; a grating, an aeration stirring device and a liquid level control device are arranged in the adjusting tank; the regulating tank is connected with the anoxic tank through a sewage lifting pump, a filler frame and a first aeration device are arranged in the anoxic tank, and filler is arranged on the filler frame; the anoxic tank and the MBR membrane tank are connected through a water inlet pump, a membrane assembly and a second aeration device are arranged in the MBR membrane tank, and the water outlet end of the membrane assembly is connected with a clean water pump. The method has the advantage that the defect that production sewage and domestic wastewater generated in the construction period of a power plant project pollute the environment and cause waste of water resources can be effectively overcome.

The invention provides an OA up-and-down partition type membrane biological reaction sewage treatment system and method. The sewage treatment system comprises a treatment tank, a filter membrane assembly, an upper-layer aeration device and a lower-layer aeration device. The upper layer of the treatment tank is an aerobic layer and the lower layer is an anaerobic layer. The aerobic layer and the anaerobic layer are arranged in an up-and-down partitioned manner, nitrogen in the sewage is converted into nitrate and nitrite through nitrobacteria treatment in the aerobic layer, and phosphorus is absorbed by bacteria. Then, the upper-layer sewage gradually enters the lower anaerobic layer to be subjected to denitrification reaction; nitrate and nitrite are converted into nitrogen through denitrification reaction, bacteria release phosphorus while denitrification is performed, free-state phosphine is in a considerable proportion in a lower-layer light shielding environment, and the nitrogen and the free-state phosphine are quickly discharged along with aeration at the bottom of the membrane pool so that the purposes of nitrogen and phosphorus removal in sewage treatment are achieved. After denitrification treatment, part of the sewage subjected to nitrogen and phosphorus removal enters a filter membrane assembly, clear water is obtained after sewage removal two-phase separation and discharged, and the remaining sewage enters the upper layer along with aeration flow to be subjected to the next circulation.

The invention specifically discloses a chemical for removing nitrogen and/or phosphorus and a preparation method thereof, belonging to the technical field of wastewater treatment. The preparation method comprises the following steps: mixing a ferrous source, a raw material A and glass pumice, adjusting the pH value of a formed system to no less than 8, and carrying out a reaction to obtain the chemical, wherein the material A is a material which can react with nitrogen and/or phosphorus in to-be-treated wastewater to produce a magnesium ammonium phosphate precipitate. The invention also discloses the chemical prepared by using the preparation method and the application of the chemical in the treatment of wastewater and the co-production of a slow-release fertilizer. According to the invention, the glass pumice has dense through-type micro-pores inside, especially has the application functions of storage and sustained release of fertilizers, water absorption and water retention, and canbe combined with other substances for effective physical and chemical absorption of nitrogen and phosphorus in a water body. The chemical has good stability, wide application range, small dosage andlow sludge output and can be used as the slow-release fertilizer. The chemical is an environmentally friendly agent with good application prospects.

The invention discloses a flow guide wall device, a water quality purification treatment system and a method thereof. The flow guide wall device comprises a framework assembly and a filling assembly.A gap is formed in the side wall of the framework assembly, the framework assembly is further provided with an accommodating groove communicated with the gap, and the filling assembly comprises a filter layer and a phosphorus removal filter material layer. The filter layer and the phosphorus removal filter material layer are both arranged in the accommodating groove, and the phosphorus removal filter material layer is positioned on the upper part. The water quality purification treatment system comprises a plurality of flow guide wall devices, and the flow guide wall devices are arranged on revetments on the two sides in the water flow direction of a to-be-treated water area at intervals so that water flows circuitously. According to the flow guide wall device, the water quality environment state does not need to be changed manually, the purification efficiency is high, and when sewage in a to-be-treated water area flows through the framework structure, the purpose of nitrogen and phosphorus removal is achieved in a biophysical combination mode. The flow guide wall device can achieve the purposes of no energy consumption, high purification rate, wide application range and multifunctional phosphorus element reduction measures.

The invention discloses a reeling waste water processing method and relates to the technical field of waste water treatment. The method comprises the following steps that A. the waste water passes a filter screen and enters into a hydrolysis pond that contains hydrochloric acid for hydrolysis; B. after the hydrolysis, the waste water enters into a cooling pond, and when the temperature of the waste water is cooled to 15 DEG C to 35 DEG C, the waste water then enters into an anaerobic tank that contains denitrifying phosphate-accumulating organisms; C. the waste water enters into an anoxic pond that contains denitrifying bacteria at a temperature of 15 DEG C to 35 DEG C; D. the waste water then enters into an aerobic pond that contains nitrobacteria and nitrosobacteria at a temperature of 15 DEG C to 35 DEG C; an aeration apparatus is turned on; E. the waste water enters into a sedimentation pond; a coagulant is added to precipitate sludge to obtain a precipitate, and the precipitate and water are separately discharged; and F. the waste water enters into a solution with a decolorant for decolorization. Compared to the prior art, the method can effectively reduce the content of total nitrogen, total phosphorus and sericin protein in the reeling waste water, thereby obtaining transparent and clear water.

The invention relates to the field of water treatment, in particular to a film bioreactor and a sewage treatment process. The film bioreactor comprises an anoxic tank, film tanks, an anaerobic tank and an aerobic tank. The two film tanks can be communicated through a film tank channel; and the film tank is communicated with the anoxic tank through a sludge reflux regulating valve. The anaerobic tank can be communicated with the anoxic tank through an anoxic and anaerobic sludge channel arranged at the bottom of the anoxic tank; and the aerobic tank can be communicated with the film tank through an aerobic tank and film tank sludge channel arranged at the bottom of the aerobic tank. And the aerobic tank and the anaerobic tank can be communicated through an anaerobic-aerobic sludge channel arranged at the bottom of the anaerobic tank. Sludge in the film bioreactor in the embodiment circularly flows in a closed manner in the film bioreactor. One-way flow of the sludge is automatically formed in the film bioreactor under the action of airlift circulation, and the effect of a sludge reflux pump is replaced, so that the energy consumption is reduced; meanwhile, the sludge activity can becontinuously converted in aerobic, anaerobic and anoxic environments, so that the purposes of nitrogen and phosphorus removal are achieved.