63results about How to "Extended sludge age" patented technology

This invention relates to a preparation method for a compound high efficient microbe preparation used in processing waste water including: A, selecting and cultivating, B, fermenting and cultivating the preparation of oxygen and anaerobic compound microbes, C, fermenting and cultivating the preparation of aerobic microbes, D, mixing them. 1, the preparation prepared in this invention is avirulent and will not cause second time pollution, 2, microbes in this preparation can degradate organics and ammonia nitrogen pollutant factors thoroughly due to multikind of microbes and quick speed to degradate pollutants in waste water, 3, output of mud is less, the life time is long and its settlement is good, 4, the preparation method is simple.

The invention discloses an efficient denitrification, dephosphorization, denitrification and phosphorus resource recycling process for urban sewage. The process comprises the following steps of: adding the sewage into an anaerobic pond; adding the sewage into a first sedimentation basin for sludge and water separation, adding sludge into an oxygen-poor pond across a nitrification pond, adding a part of supernatant into an induced crystallization reactor for dephosphorization, adding the part of dephosphorized supernatant into the nitrification pond, directly adding the other part of supernatant into the nitrification pond and converting ammonia nitrogen in the supernatant into nitrate; adding the sewage in the nitrification pond into a second sedimentation basin for sludge and water separation, adding the supernatant into the oxygen-poor pond for finishing phosphorus absorption and denitrification, making a part of sludge flow back into the nitrification pond and discharging the residual sludge; and adding the sewage into an aeration basin from the oxygen-poor pond and adding into a final clarifier from the aeration basin for sludge and water separation, discharging the supernatant, making a part of sludge flow back into the anaerobic pond and discharging the residual sludge. After being treated by the process, discharged water directly reach a first grade A standard of a pollutant discharge standard for municipal sewage treatment plants, and has extremely high dephosphorization and denitrification efficiencies.

The invention belongs to the technical field of sewage treatment, and relates to a parallel anaerobic-anoxic-oxic (A2O)-membrane bioreactor (MBR) denitrifying phosphorus removal method. Adopted devices comprise an oxic tank, an anaerobic tank, an anoxic tank and a membrane tank, wherein the oxic tank is connected in parallel with the anaerobic tank; sewage to be treated and external reflux sludge are mixed in a distribution well and flow into the oxic tank and the anaerobic tank according to a proper proportion respectively, and internal reflux mixed liquid which reflows from the anoxic tank also flows into the oxic tank simultaneously; sewage which flows out of the oxic tank and sewage which flows out of the anaerobic tank are mixed and flow into the anoxic tank together for denitrifying phosphorus removal; and the sewage enters an MBR tank for sludge and water separation, and a part of residual sludge serves as the external reflux sludge to be fed into the distribution well. The parallel A2O-MBR denitrifying phosphorus removal method can be used for the new construction and modification engineering of a biological denitrifying phosphorus removal sewage plant, the volume and the aeration amount of an aeration tank can be reduced, and a secondary sedimentation tank can be eliminated simultaneously, so that the floor space of an urban sewage plant is reduced.

The invention relates to a process for enhancing denitrogenation of a membrane bioreactor by anaerobic fermentation acid production. The process adopts an enhanced anaerobic tank, an anoxic tank and an aerobic tank. After entering the process, the sewage undergoes biochemical treatments including anaerobic fermentation, anaerobic denitrification and aerobic nitrification under the action of different kinds of microorganisms, and finally the effluent is sucked and collected by membrane filtration. By optimizing the growth environment of microorganisms in the anaerobic section, the process, on the one hand, promotes hydrolysis acidification of particle-stage organic matters (including colloid-state organic matters), slowly-degradable organic matters and hardly-degradable organic matters in the raw sewage, and on the other hand, produces acids from the excessive activated sludge which is discharged to the anaerobic tank to provide high-quality carbon sources for anaerobic denitrification. Besides, the process enhances the biological denitrification process by increasing sludge concentration, solves the problem of insufficient carbon source in biological denitrification process, and achieves the purpose of removing total nitrogen from the sewage with high efficiency by virtue of high-efficiency cut-off and separation characteristics of the membrane. The process can supplement carbon sources to the denitrification section for enhanced denitrogenation by fully utilizing converted carbon sources in the incoming water and carbon sources generated by sludge fermentation in the process without needing extra carbon sources. The process is simple and flexible in control, and the total nitrogen in the effluent can reach or exceed the first-class (A-class) discharge standard.

The invention relates to a biological thickening device for reducing pollutants in wastewater, and concretely relates to a biological thickening device for reducing pollutants in coal chemical industry wastewater to solve a problem that outlet water cannot reach the standard because of partial toxic organic matter residues, high concentration ammonia nitrogen and suspensions in the outlet water processed through present coal chemical industry wastewater processing technologies. The internal of the pool body of the device is divided into three zones and seven galleries by baffle walls; the three zones are an anaerobic precipitation zone, an inclined tube precipitation zone and a backflow sludge zone respectively, the seven galleries are a first longitudinal gallery, a first transverse gallery, a second longitudinal gallery, a second transverse gallery, a third longitudinal gallery, a fourth longitudinal gallery and a fifth longitudinal gallery respectively, an external biological thickening oxidation gallery comprises the first longitudinal gallery, the first transverse gallery, the second longitudinal gallery and the second transverse gallery, an internal biological thickening oxidation gallery comprises the third longitudinal gallery, the fourth longitudinal gallery and the fifth longitudinal gallery, and the biological thickening oxidation gallery comprises the external biological thickening oxidation gallery and the internal biological thickening oxidation gallery. The biological thickening device is used to reduce the pollutants in the coal chemical industry wastewater.

The invention relates to a biological treatment method of coal chemical wastewater, which adopts a biological reaction-muddy water separation integrated bioreactor. The method comprises the following steps of: sequentially feeding materialized and pre-treated coal chemical wastewater into an anaerobic bioreactor, an anoxic bioreactor, a first-stage aerobiotic bioreactor, a second-stage aerobiotic bioreactor and a third-stage aerobiotic bioreactor, selecting each aerobiotic bioreactor to discharge water and inflow into the anoxic bioreactor; and carrying out anaerobic acidification treatment by the anaerobic reactor, reinforcing a biological denitrification reaction in the anoxic reactor to remove non-gradable organic matters, completely decarbonizing by the first-stage aerobiotic bioreactor, and realizing the short-course nitratlon reaction and the whole-course nitratlon reaction by the second-stage aerobiotic bioreactor and the third-stage aerobiotic bioreactor, wherein the sludge concentration in the reactor can be guaranteed to be greater than 8mg/L due to the biological reaction-muddy water separation integrated bioreactor, the sludge age is greater than 60 days, the specific strains can be preferably cultured, and the function realization of a novel method can be guaranteed. The coal chemical wastewater is treated by the method, so that the discharged water can reach the requirement of the national wastewater comprehensive discharge standard.

The invention belongs to the technical field of environmental protection processing devices, and relates to an air flow and machinery double-boosting internal circulation-type high suspension solid anaerobic digestion device. The device comprises a material charging pipe, an internal cylinder section, an external cylinder section, a three-phrase separation section, a mixing section, a water discharging pipe, a sludge discharging pipe, a methane collecting pipe, a sampling detection port and the like. The material charging pipe sends suspension solid to the internal cylinder section directly; in the internal cylinder section, anaerobic sludge and the suspension solid are mixed and elevated through double power actions of generated rising methane air flow after reaction and mechanical blade boosting; then the mixed liquid goes into the three-phrase separation section; in the three-phrase separation section, waste water overflows and is discharged by the water discharging pipe, methane rises up and goes into the methane collecting pipe, the sludge settles and goes into the mixing section through the external cylinder section, part of the sludge goes into the internal cylinder section under the action of the above thrust and forms internal circulation, and the excess sludge is discharged by the sludge discharging pipe. The device can be used for processing of waste water containing high suspension solid, residual sludge, household garbage and the like. The device has remarkable social, environmental and economic benefits.

The invention relates to a normal-temperature low-C/N-ratio sewage continuous shortcut nitrification starting method, and belongs to the sewage treatment and regeneration field. The method comprises the following steps: dividing the aerobic zone of an A<2>O reactor into three segments comprising an aerobic segment 1, an aerobic segment 2 and an aerobic segment 3 along a water flow direction, and refluxing a nitrification liquid to an anoxic zone from the aerobic segment 3; and inoculating nitrated sludge into the reactor until the concentration of sludge in the reactor is 2.5-3g/L, rapidly elutriating nitrite oxidation bacteria (NOB) with continuous flow short-sludge-age water at a water temperature of 23-25DEG C, screening ammonia-oxidizing bacteria (AOB), adding a cylindrical polypropylene suspension filler into an aerobic zone, recovering the long sludge age, reducing the dissolved oxygen concentration of the aerobic zone, and maintaining the above conditions until the mass concentration of ammonia nitrogen in water discharged from the A<2>O reactor decreases to below 2mg/L and the nitrosification rate stably maintains above 80% in order to complete the continuous shortcut nitrification starting. The starting method realizes the advanced treatment of the N element through shortcut nitrification denitrification, and is simple and feasible.

The invention relates to a three phase separator of an up flow type anaerobic reactor, which is composed of a cone diversion drum arranged on the upper end of a anaerobic reactor barrel, a gas hood arranged on the upper end of the cone diversion drum, a gas chamber is composed of the gas hood and a wide mouth of the cone diversion drum, a circular passage arranged between the lower end of the gas hood wall and the upper end of the cone diversion drum wall, a circular passage arranged between the lower end of the cone diversion drum wall and the upper wall of the anaerobic reactor barrel, a gas chamber with bigger volume and a bigger gas liquid separation interface is composed of a circular wide mouth on upper of the cone diversion drum and a cylinder gas hood, can reduce release rate of biogas and aqueous vapour entraining amount discharged from the reactor barrel, adopting the invention, gas in mixture liquor of gas, sludge and water can not enter into the settling zone barrel, gas can be separated and removed effectively to avoid gas leaking to the settling zone barrel to interfere solid-liquid separation effect.

The invention discloses a device and a method for treating ammonium nitrate wastewater by a biological method and belongs to the technical field of biological-process wastewater treatment. The device is provided with an anaerobic fermentation reactor SBR, a mixing tank, an upward-flowing anaerobic sludge bed reactor UAFB and a draining tank. By pH/ORP sensors installed in the mixing tank and the upward-flowing anaerobic sludge bed reactor UAFB, the addition amount of diluted nitric acid and fermentation solution and the processing load are optimized and controlled. According to the device and the method disclosed by the invention, a sequencing batch reactor and the upward-flowing anaerobic sludge bed reactor are creatively combined and used for treating industrial ammonium nitrate wastewater; sludge fermentation and denitrification are connected in series and coupled with anaerobic ammonia oxidation, so that sludge amount reduction and deep denitrification of the ammonium nitrate wastewater are both realized.

The invention discloses a sewage treatment process and a sewage treatment device. The process comprises the steps: S10, dividing sewage into two paths to be conveyed to an anaerobic tank and an anoxic tank respectively, and treating the sewage in the anaerobic tank and enabling the sewage to enter the anoxic tank to be subjected to deep denitrification; S20, enabling sewage in the anoxic tank to flow out in two paths: one path flows back to the anaerobic tank, and the other path sequentially passes through the anoxic aeration tank and the aerobic zone to be fully nitrified; S30, enabling the sewage in the aerobic zone to flow out in two paths: one path flows back to the anoxic tank, and the other path is input into a secondary sedimentation tank for mud-water separation to form precipitated sludge; S40, enabling the precipitated sludge to flow back to the sludge regeneration tank, and carrying out the aeration treatment in the sludge regeneration tank to form activated sludge; S50, enabling the activated sludge in the sludge regeneration tank to flow back to the anoxic tank. According to the invention, sewage is subjected to multi-path water inlet, multi-path backflow, controlled aeration, conditioning and recarburization treatment, and sludge is subjected to activation and backflow treatment, so that the activity of different target bacterial colonies in each area can be improved to realize high-efficiency denitrification, and the aeration process is more energy-saving.

The invention discloses a mechanical internal circulation jet-flow anaerobic reactor and a wastewater treatment method thereof, and belongs to the technical field of biological sewage treatment. The mechanical internal circulation jet-flow anaerobic reactor comprises a reactor tank body, a multi-phase separator, a water outlet weir and an internal circulation jet-flow device, wherein the internal circulation jet-flow device comprises an upper part and a lower part; the upper part comprises a jet-flow hole, a diffusion hole, a flow guide pipe and a flow stabilization hole; the lower part comprises a motor, a rotary shaft and high-speed blades. The wastewater treatment method comprises the following steps: forming a fluidized bed layer, forming a suspended bed layer, separating a separation region and discharging water from the water outlet weir. Due to the use of the internal circulation jet-flow device, the difficult problems of low treatment load, instable effect and relatively narrow application range in the treatment process of an existing conventional anaerobic reactor are solved; the mechanical internal circulation jet-flow anaerobic reactor has the advantages of high treatment load, good water impact resistance, high concentration of biological toxicity resistance matters, quick starting and the like.

The invention discloses a device for processing the waste water of a biological granulating fluidized bed, which comprises: a biological granulating fluidized bed, a device of effluent pressurization and administration, and a device for reflux dissolved oxygen consisting of a reflux valve (30), a dissolved oxygen water tank (31), a reflux pump (32) and a control valve, connecting the outer cylinder (20) of the biological granulating fluidized bed with reflux drain opening (29) and connecting the device of effluent pressurization and administration with the triple valve (6) to produce the reflux circuit. The invention highly effective removals the suspended matter and organic matter in the waste water, and synchronizing finishes the solid-liquid separation in a unit.

The invention discloses an SBR (Sequencing Batch Reactor) activated sludge process for soybean lecithin production. The process comprises the following steps: performing pretreatment sludge fishing, pretreating floating oil, adjusting water quantity in an adjusting tank, homogenizing water quality, performing coagulation air floating treatment, performing acidification conditioning in a hydrolysisacidification tank, and performing aerobic treatment in an integral bioreactor. The process disclosed by the invention is concise in process, efficient in solid-liquid separation, excellent and stable in effluent quality, capable of removing ammonia nitrogen and refractory organic matters and overcoming defects that sludge expansion can be easily caused when a conventional activated sludge process is used, small in floor space, free of secondary sedimentation tank and centralized in process equipment.

The invention belongs to the technical field of sewage treatment and discloses a device and method for in-situ sludge reduction by an intensive AOMBR (anoxic/aerobic membrane bioreactor) process. Themethod includes steps: feeding sewage into an anoxic pond from a water inlet, mechanically stirring to well mix the sewage with sludge, enabling mixed liquid to enter the upper portion of an aerobic pond from the bottom of the anoxic pond, completely mixing solution through an aeration device and a submersible pump, controlling dissolved oxygen, enabling the solution to enter the upper portion ofa high-oxygen membrane pool from the bottom of the aerobic pond, controlling dissolved oxygen through the aeration device, discharging the solution through a discharging pump and an MBR membrane component, returning a part of mixed liquid in the high-oxygen membrane pool to the anoxic pond through a nitrification liquid return pump and a pump pipe, enabling the other part of the mixed liquid to laterally flow to an anaerobic reactor through a sludge return pump and a pump pipe, mechanically stirring to make the sludge in a suspended state and well contact with filler, and flowing into the anoxic pond from an overflow pipe through a connection pipe. By adoption of the method, pollutant removal effects can be improved, the excess sludge yield can be reduced, and system nutrient substance removal effects can be improved.

Disclosed is a biochemical comprehensive treatment method for 1, 3-propylene glycol fermentation organism waste water. The biochemical comprehensive treatment method includes concentration of fermentation organism, ATAD, UASB, alternating A/O and chemical coagulation; culturing and domesticating thermophilic bacteria inside an ATAD reactor first, then culturing and domesticating anaerobic activated sludge inside a UASB reactor, and finally culturing and domesticating aerobic activated sludge inside an alternating A/O pool. During a formal experiment, waste water is treated by the ATAD first so as to improve biochemical property of waste liquor and enable viral fermentation organism to be converted into substances with biochemical energy, ATAD effluent is treated by the UASB so as to further lower down concentration of organism, methane produced in the process is recycled, and final UASB effluent can achieve the B standard of first-class emission standards of national standard GB18918-2002 after treated by the alternating A/O technique and the chemical coagulation, thereby realizing safe emission and providing a novel degradation pathway for the 1, 3-propylene glycol fermentation organism waste water.

The invention discloses a method for culturing hydrogen autotrophic denitrification granular sludge. The method comprises the following steps: 1) domesticating and culturing hydrogen autotrophic denitrification flocculent sludge; 2) inoculating the flocculent sludge cultured in the step 1) into a reactor; (3) continuously operating for 8-15 days by adopting an SBR operation mode, wherein an operation period is 90-120 minutes; and taking simulated nitrate wastewater as inflow water; 4) continuously operating for 7-15 days by adopting an SBRoperation mode, wherein the operation period is 30-40minutes; and using the simulated nitrate wastewater as inflow water. The hydrogen autotrophic denitrification granular sludge prepared by the method is ochre, mature granules are basically ellipsoids,and the interior of each mature granule is relatively compact. The granular sludge has good settling performance, the microbial biomass in the reactor can be increased, the sludge age can be increased, and the operation load of a hydrogen autotrophic denitrification process can be increased.

The invention discloses an efficient short-range internal-recycle integrated bioreactor with a synchronous denitrifying function. The efficient short-range internal-recycle integrated bioreactor with the synchronous denitrifying function comprises a water collecting tank, and a water inlet of the water collecting tank is communicated with a wastewater outlet. The efficient short-range internal-recycle integrated bioreactor is provided with the water accumulation tank, an adsorption tank, a settling tank, a mixing tank, an aerating-aerobiotic clarifying system and a clean water tank along a wastewater purifying direction, a first wastewater lifting pump is arranged between the water collecting tank and the adsorption tank, a second wastewater lifting pump is arranged between the mixing tank and the aerating-aerobiotic clarifying system, the settling tank is communicated with a sludge tank, the aerating-aerobiotic clarifying system comprises an aerobiotic three-phase separator and an aerating clarifying tank, the aerobiotic three-phase separator is arranged inside the aerating clarifying tank and communicated with the adsorption tank through a sledge backflow pipe, an aerating hose is arranged at the bottom of the aerating clarifying tank and connected with a fan through an air pipe, and a first electrically-controlled flow valve is arranged on the air pipe. The efficient short-range internal-recycle integrated bioreactor with the synchronous denitrifying function has the advantages that technological processes are simplified greatly, about 1/3 of floor space of a sewage treatment facility is saved, investment on pipelines is reduced, and convenience in operation and management and simplicity in controlling are realized.

The invention relates to solar energy power small town single household integrated domestic sewage treatment equipment using a multifunctional nanometer material as a core. According to the present invention, the solar energy power small town single household integrated domestic sewage treatment equipment is used for small town domestic sewage, can enhance the removal effects on COD, ammonia nitrogen and total nitrogen in sewage, can provide high precision removal effects for nitrogen, phosphorus, SS, fecal coliform bacteria and other pollutants, can eliminate the pollution risks of receiving eutrophication point sources, can effectively reduce the pathogenic microorganism content in effluent, can improve the water transparency of effluent while significantly reduce the remaining sludge production, and can effectively reduce the operating cost.