49results about How to "Realize denitrification and dephosphorization" patented technology

A method of denitrification and phosphorus removal under low temperature relates to a way of sewage treatment. The invention solves the problem of the poor effect of existing biological simultaneous denitrification and phosphorus removal under low temperature. The invention comprises the steps of: 1. cultivation and fixation for nitrifying and denitrifying bacteria of low temperature tolerance; 2 start-up response system and cultivation of phosphate accumulating bacteria ; 3. denitrification and phosphorus removal under low temperature by the steps: a. denitrification by nitrate solution refluxing; b. anaerobic action; c. aerobic phosphorus removal; d. precipitation and sludge reflux; e. contacting oxidation and nitration; f. precipitation and water obtained. After the steps, denitrification and phosphorus removal of sewage treatment under low temperature are finished. The invention can realize simultaneous denitrification and phosphorus removal under low temperature. The invention comprises the contents under low temperature: the removal rate of COD is above 85 percent; the removal rate of overall phosphorus reaches above 80 percent; the removal rate of ammonia nitrogen reaches above 70 percent when the intake ammonia nitrogen is between 25-60mg/L.

The invention belongs to the field of sewage treatment and provides a short distance denitrifying dephosphatation double-sludge technique taking granular sludge as medium and a device thereof. The device sequentially comprises a raw water pipe, a water inlet tank and a water inlet valve, and is characterized by further sequentially comprising an anaerobic/anoxic SBR reactor and an intermediate water tank which are connected with each other by a pipeline as well as a short distance nitration SBR reactor and a back flow water tank that are also connected with each other by the pipeline; wherein the intermediate water tank is connected with the short distance nitration SBR reactor, and the back flow water tank is connected with the anaerobic/anoxic SBR reactor; the anaerobic/anoxic SBR reactor and the short distance nitration SBR reactor are internally provided with stirring devices, and a drain pipe is arranged on the anaerobic/anoxic SBR reactor; the short distance nitration SBR reactor is internally provided with an aerating apparatus; the granular sludge which is processed by acclimatization and has the function of denitrifying dephosphatation is put into the anaerobic/anoxic SBR reactor, and the granular sludge which is processed by acclimatization and has the function of short distance nitration is put into the short distance nitration SBR reactor. The invention solves the problems of unstable effect of nitrogen and phosphorus removal of sewage, high content of effluent suspended matter and lower pass rate, so as to be used for low C/N waste water treatment.

The invention belongs to the technical field of sewage treatment, and discloses an MABR-MBR combined type sewage treatment device. The device comprises a pre-treatment unit, an MABR unit, an MBR unit and a backflushing unit matched with the MBR unit, wherein the four units are arranged along a sewage flowing direction. The invention further discloses a control method thereof. The effect of removing nitrogen and phosphorous is well realized through the sufficient combination of advantages of two membrane reactors. Since the bubbleless aeration is adopted in an MABR pond, the utilization rate of the oxygen is high and nearly can achieve 100%. Since the mass transfer range of the oxygen is small, denitrifying bacteria and denitrifying phosphate-accumulating organism are mainly existent in the water to finish denitrification and phosphorous releasing process of the nitrate, and the performance of removing nitrogen and phosphorous in the next stage is strengthened. After entering an aerobic MBR pond, the aerobic bacteria further remove residual nitrite and ammonia nitrogen, and the aerobic phosphorous-accumulating bacteria finish the phosphorous removal work. Through the previous treatment of the MABR, the volumetric loading of the MBR is reduced.

The invention provides a membrane bioreactor device for retarding membrane pollution and a sewage treatment method. The membrane bioreactor device is characterized in that a three-phase separator is arranged in a membrane bioreactor, and a sewage treatment device with a membrane reaction zone at the upper part and a contact oxidation zone at the lower part is formed; sewage enters the contact oxidation zone from the bottom of the reactor and then enters the membrane reaction zone from a slit of the three-phase separator; under the combined action of the absorption of activated sludge and the interception of membranes, the treatment of the sewage is realized; with the adoption of a rotating membrane filtering component, the rotating shear force is increased to retard the membrane pollution, and meanwhile, the fact that all the membranes have uniform cleaning strength is guaranteed, and cleaning dead corners are reduced; the three-phase separator is connected with a gas guide tube, so that residual gas in the contact oxidation zone is guided into the membrane reaction zone at the upper part to be used as a gas washing source of a membrane component, therefore the energy consumption is reduced; online ultrasonic cleaning and chemical cleaning equipment is arranged to reduce the assembly and disassembly procedures in the membrane cleaning process. The sewage treatment device and method have the advantages of high treatment efficiency, small membrane pollution, stable effluent water quality and good convenience in operation and management.

The invention relates to a biological phosphorus removal device and method by coupling short-cut denitrification and anaerobic ammonia oxidation denitrification and belongs to the field of sewage treatment. The device is composed of an anaerobic zone, an anoxic zone I, an aerobic zone I, an anoxic zone II, an anoxic zone III, an aerobic zone II and a settling pond. Water inflow is controlled by a PLC system, and 60% of raw water enters the anaerobic zone to realize anaerobic phosphor release; then a mixed liquid is denitrified in the anoxic zone I, and absorbs phosphor and is nitrified in the aerobic zone I; the mixed liquid and 40% of the raw water enter the anoxic zone II at the same time to realize the short-cut denitrification; then the mixed liquid enters the anoxic zone III operating in an IFAS manner to realize anaerobic ammonia oxidation reaction, and the mixed liquid in the anoxic zone III further absorbs phosphor and is nitrified in the aerobic zone; and finally, the mixed liquid enters the settling pond to separate sludge and water, the supernate is directly discharged out of the system, and concentrated sludge flows back to the anoxic zone I through a reflux pump and then flows back to the anaerobic zone from the anoxic zone I through a mixed liquid reflux pump. Residual sludge of the system is discharged out of the system periodically, so that simultaneous phosphor and nitrogen removal is realized.

The invention discloses a device and method for treating urban domestic waste water based on short-distance denitrifying dephosphorization coupling anaerobic ammonia oxidation, and belongs to the field of municipal domestic waste water treatment. The device comprises a raw waste water tank, No.1 SBR, a middle water tank, No.2 SBR and the like. The method comprises the following steps of firstly, introducing the domestic waste water into the No.1 SBR, releasing phosphorus in an anaerobic stage by denitrifying phosphorusaccumulating bacteria, and simultaneously absorbing an external carbon source in the waste waterand converting the external carbon source into an internal carbon source; secondly discharging effluents of the No.1 SBR into the No.2 SBR and carrying out a short-distance nitrification reaction; and after the reaction is finished, enabling effluents of the No.2 SBR to return to the No.1 SBR and carrying out short-distance denitrifying dephosphorization, anaerobic ammonia oxidation and an endogenous short-distance denitrificationreaction so as to realize the denitrifying dephosphorization of urban domestic waste water. A two-sludge system takes full advantage of an organiccarbon source in raw water, an extra carbon source is not needed, energy consumption of the aeration is saved, the operating cost is reduced, and the method is a new, economic and efficient method for treating the urban domestic waste water.

The invention discloses a treatment process for realizing urban sewage denitrification and phosphorous removal coupled sludge fermentation by a two-stage sequencing batch reactor, and belongs to the field of sewage sludge biological treatment. The process comprises: a water inlet water tank, a bio-reinforced phosphorus removal coupled partial short-range nitrification reactor (EBPR-PN-SBR), an intermediate water tank, an anaerobic ammonium oxidation coupled sludge fermentation and denitrification reactor (ASFD-SBR), and a water outlet water tank. Biological phosphorous removal and short-rangenitrification are carried out in the EBPR-PN-SBR, an internal carbon source stored in the raw water COD is used for phosphorus removal, and phosphorus removal and the conversion of a part of ammonia nitrogen to nitrite nitrogen is carried out in an aerobic section. The anaerobic ammonium oxidation bacteria in ASFD-SBR convert the influent ammonia nitrogen and nitrite nitrogen into nitrogen and a small amount of nitrate nitrogen, the produced nitrate nitrogen is reduced to nitrogen by a carbon source produced by sludge fermentation, the fixed bed filler is used for holding anaerobic ammonium oxidation bacteria, and the denitrification and sludge fermentation process occurs in floc sludge. According to the process, the energy consumption is saved, and denitrification, phosphorus removal andsludge reuse of low-carbon-to-nitrogen ratio (C/N) urban domestic sewage are realized.

The invention discloses an A<2>/O-BCO improvement process utilizing fermented sludge, and belongs to the technical field of biological treatment of sewage. The process comprises the following steps: mixing fermentation liquid with domestic sewage in an A<2>/O for anaerobic reaction, mixing the fermentation liquid and domestic sewage mixture with nitrification liquid for denitrification and dephosphorization reaction under an anoxic condition, carrying out aerobic treatment, then separating the material from a plate sedimentation tank, and respectively obtaining supernate and sludge; placing the supernate into a biological contact oxidation pond with carbon fiber, carrying out short-range nitrification reaction under an aerobic condition, putting reaction liquid subjected to the nitrification reaction into a sedimentation region, and respectively obtaining nitrification liquid and sludge; mixing the sludge separated from the plate sedimentation tank and the sludge obtained from the sedimentation region with alkaline solution for fermentation, and obtaining fermentation liquid. According to the A<2>/O-BCO improvement process, weight reduction and recycling of the sludge can be realized in a sewage treatment process, and the trouble that low C/N is poorer than the sewage treatment effect due to shortage of carbon sources is solved.

The invention discloses a culture method of a fungicide for water purification. The method comprises the following steps: taking target water of water to be restored; mixing 60-70wt% of the target water, 20-25wt% of a microbial nutrition agent and 10-20wt% of a microbial inoculum through first mixing the target water with the microbial nutrition agent, then adjusting the pH value of the obtained mixed solution to be same to the pH value of restored water, and finally adding the microbial inoculum; and carrying out aeration oxygenation on the mixed solution 2-3 times every day for 3-5d to keep the concentration of dissolved oxygen to be 2-3mg/L, reducing the concentration of the dissolved oxygen to the concentration of the dissolved oxygen in the restored water when the concentration of florae reaches 10<2>-10<3>/mL, and completing the method when the concentration of the florae reaches 10<5>-10<6>/mL. Compared with like products in the prior art, the fungicide cultured through the method has the advantages of good adaptability, good practical sewage biological treatment effect and low cost.

The invention provides a direct electrogenesis method and device for sewage treatment. The method is characterized in that an oxygen-rich area is formed in the upper part of a sewage treatment building or in an aeration tank through blast aeration and mechanical aeration and has a positive redox potential, and an anoxic zone is formed in the bottom of a building or in a settling pond and has a negative redox potential. An electrode has a modular structure, conducting layers are respectively arranged in the oxygen-rich area and the anoxic zone and are used for collecting power produced by microbe redox and redox potential difference is potential. The device comprises a vertical upflow shallow aeration sewage generating unit, a horizontal plug-flow surface layer mechanical aeration generating unit or a redox potential generating unit between an aeration tank and a settling pond. The method and device promote a redox reaction and realizes sewage electric energy collection. The device can be used as a sensor for real-time monitoring of an aeration degree, improves nitrogen and phosphorus removal effects and can be used as a capacitor for improving water heavy metal ion electro-adsorption removal.

The invention provides a method for treating industrial wastewater by a novel combined process. The method adopts a regulating tank, an improved Fenton fluidized bed, a degassing neutralizing tank, a coagulative precipitation tank, an anaerobic expanded granular bed and an anaerobic/aerobic baffled reactor, wherein the units are connected by a water pipe in sequence to treat the industrial wastewater. The method has the beneficial effects that the method is optimized in process and clear and concise in route; the overall COD (chemical oxygen demand) removal rate is not less than 95%; the removal rate of characteristic organic pollutants is not less than 95%; and the method is convenient to operate and manage, is stable in process and is low in investment and operating costs.

The invention discloses a method for treating sewage by a double-membrane system of an algae bio-membrane and a plate micro-filtration membrane. The method contains two stages: a preceding stage and alater stage. In the preceding stage, the biological membrane method is adopted: in an algae bio-membrane reactor, a carrier adhesion method is adopted for immobilized culture of algae; and after a stable algae bio-membrane is formed, the algae bio-membrane reacts with domestic sewage added therein. In the later stage, a plate micro-filtration membrane module is added to filter out a few algae andother impurities mixed in an effluent obtained after treatment of the algae bio-membrane, and the deposited algae mud is recycled into the algae bio-membrane reactor to realize reutilization. By themethod of the invention, heavy metal and nitrogen and phosphorus can be effectively removed from domestic sewage and COD is reduced; and service life of the algae bio-membrane can be prolonged and effluent quality also can be improved.

The invention provides an aquatic plant cultivating device and a method for cultivating plants and purifying water by using the same. The aquatic plant cultivating device comprises a three-dimensional spatial structure made of a hard framework, wherein a basal layer for allowing plant roots to pass through is arranged at the bottom of the three-dimensional spatial structure; a positioning layer for allowing the plant roots to pass through is further arranged inside the three-dimensional space and above a lower netlike sheet. The method comprises the following steps: (1) planting the plants into the aquatic plant cultivating device; (2) putting the aquatic plant cultivating device with the plants into a water body; (3) when the plant coverage rate reaches more than n%, harvesting the plants to enable the coverage rate to be lower than m%; or raising fishes into the aquatic plant cultivating device so as to enable the plant coverage rate to be not greater than a preset value. The aquatic plant cultivating device is divided into two spatial layers, the plants are fixed by the positioning layer, and two or more types of plants can be cultivated at the same time. By the water purifying method, any eutrophic inland water body and any urban landscape water body can be purified, so that the water purifying method is an environment-friendly and secondary-pollution-free ecological engineering technology.

The invention belongs to the technical field of sewage treatment, and particularly relates to a system and method for treating sewage by using microorganisms. The system comprises: a pretreatment unit, an anaerobic microorganism treatment unit, an aerobic microorganism treatment unit, and a biofilm filtration unit, wherein the pretreatment unit is used for sedimentation of suspended solids, insoluble organic matters, inorganic particles and other particles in the sewage, anaerobic microorganisms are used to further treat the sewage to degrade hardly degradable organic matters in the sewage through the anaerobic microorganism treatment unit, aerobic microorganisms are used to further treat the sewage to degrade degradable substances in the sewage through the aerobic microorganism treatmentunit, and a biofilm is used to filter the sewage treated by the above treatment units through the biofilm filtration unit. The efficient degradation of micro-pollutants in the sewage is realized through filtration of the microorganisms and the biofilm, the problem that residual micro-pollutants still exist in the water resource treated in the prior art is solved, a good and sustainable-operation sewage treatment system can be formed, and the effects of deodorization, decolorization, turbidity removal, nitrogen and phosphorus removal, and pollutant removal can be realized.

The invention relates to a duck breeding wastewater treatment process and a resource recovery method, and the method comprises the following steps: coagulating sedimentation treatment: removing fine suspended solids and colloidal substances in duck breeding wastewater; blow-off pre-treatment: removing and recovering ammonia nitrogen, so that the inhibition effect of high ammonia nitrogen on anaerobic reaction in the later period can be avoided; anaerobic biological treatment: carrying out anaerobic biological treatment by adopting an anaerobic device, and degrading organic matters in the duckbreeding wastewater by utilizing facultative or obligate anaerobic bacteria in the anaerobic biological treatment; struvite precipitation treatment: carrying out advanced treatment on anaerobic effluent by a struvite precipitation method; aerobic biological treatment: conducting aerobic biological treatment through an aerobic device, and utilizing metabolic activity of aerobic microorganisms in aerobic biological treatment, so up-to-standard discharge of the duck breeding wastewater is achieved. According to the method, resource substances such as ammonia gas, methane and struvite can be recycled while the duck breeding wastewater is treated, and meanwhile stabilization, harmlessness and recycling of duck breeding wastewater treatment are achieved.

The invention discloses a sea water desalinization discharged sludge artificial wetland treatment system which comprises a sludge buffer pool, a sludge pump, a flow meter and an artificial wetland, wherein a sludge pipe is connected between the sludge buffer pool and the artificial wetland; the artificial wetland comprises a wetland pool, a sludge distribution pipe, a water collection pipe as well as a wetland plant, a sludge layer, a filler layer and an impermeable layer sequentially arranged in the wetland pool from top to bottom; and the sludge distribution pipe is connected with the sludge pipe, and a sludge outlet hole is formed in the sludge distribution pipe. The invention also discloses a treatment method using the treatment system. Through the invention, the sludge treatment using an artificial wetland and a reasonably-arranged filler layer integrates sludge concentration, dehydration and degradation, and a series of physical and chemical changes such as dehydration reduction, nitrogen and phosphorus removal of leachate, removal of organic matters and heavy metals and the like can be realized so as to realize reduction and harmless treatment on the sludge.