175results about How to "Improve the effect of nitrogen and phosphorus removal" patented technology

The invention relates to a sewage double-biomembrane deep treatment technology comprising the steps: sewage enters an anaerobic tank, an anoxic tank and an oxygen maintaining tank after being pretreated by a grid and settled sand, and mud releases phosphorus in the anaerobic tank; the sewage is denitrified in a denitrification mode in the anoxic tank so as to remove most of organic matters; cilium biological fillers are arranged in the oxygen maintaining tank, biomembranes are attached to the cilium, absorb the phosphorus in excess and degrade the partial organic matters; the sewage enters a secondary sedimentation tank to carry out sedimentation treatment through the oxygen maintaining tank and then enters an aeration biological filter tank; granule biological fillers are arranged in the aeration biological filter tank, and the biomembranes are attached to granules, degrade the residual organic matters in the sewage and convert ammonia nitrogen into nitrate nitrogen; one part of the discharged water of the aeration biological filter tank flows back into the anoxic tank, and the other part is discharged; one part of the mud generated by the secondary sedimentation tank back flows into the anoxic tank, and the other part of the mud is discharged out of a system. The sewage double-biomembrane deep treatment technology has the advantages of investment saving, low operation cost, little land occupation and good treatment effect.

The present invention discloses a sewage treatment method and device by the angleworm strengthening with manual everglade; the method is to put one type of angleworm with sewage treatment effect into the wet soil of the device in order to improve the oxygen-distribution situation in the existing manual everglade treatment technical; the method can overcome the shortcoming that: the existing sewage treatment is easy to be blocked and the effect for de-nitrogen and de-phosphor is much worse. The method can enhance the effect of organic substance separating and de-nitrogen and de-phosphor and prolong the everglade filling and exchanging period. The sewage after being treated can reach the drainage standard and realize the resource utilization requirement.

An ecological method using artifical marshland system for controlling N-P pollution includes such steps as sequentially flowing the rain or sewage in sand deposition pool, in stage-one free-surface artificial marshland (staying for more than 1.5 hr), in zeolite undercurrent marshland containing zeolite and cinder (staying for more than 1 hr), and in stage-two free-surface artificial marshland (staying for more than 8 hr). Its advantage is high effect.

The invention discloses a process for treating chemical industrial tail water by an immobilized microbe-artificial wetland, that is, the tail water of the integral waste water which is from a chemical industrial park and is treated by an active sludge method enters the process device so as to reach the aim of further removing COD, N, P and various organochlorine pollutants in the tail water. Advantageous bacteria species which are fixed in a microcapsule by an immobilized microbe technology are used for degrading organochlorine pollutants in the chemical industrial tail water, thereby improving the treatment effects of the artificial wetland on the organochlorine pollutants, reinforcing the impact load capability of an artificial wetland system for resisting the organochlorine pollutants, and reducing the impact of the organochlorine pollutants on the artificial wetland micro-ecological environmental system. The process has the advantages that the process makes use of the combined actions of the immobilization and an artificial wetland technology, and strengthens the sewage treatment effects, and the treated waste water not only can discharge after reaching standards, but also can reduce the pollution of the organochlorine pollutants on the environment.

The invention relates to a method for treating sewage and a device thereof.The method for treating the sewage by integrative sequencing batch botanical bench-scale dynamic membrane is characterized in that the method comprises the following steps: (1) preparation of the device comprises the processes that: a separation bucket is arranged in cavity of a membrane bioreactor; the botanical bench-scale dynamic membrane is arranged in a dynamic membrane filter room which is between a fixed support of the up and under dynamic membrane; (2) sludge is poured into the cavity of the membrane bioreactor to a height of 45 percent to 50 percent of the height of the cavity from an entrance which is on the top of the separation bucket; (3) an outlet valve on a water pipe is closed, and then the sewage is poured into the cavity of the membrane bioreactor to a height of 90 percent to 98 percent of the height of the cavity from the entrance which is on the top of the separation bucket through a sewage inlet pipe; (4) after stirred for 2.0 to 4.0h, aeration is injected into the membrane bioreactor and stirring is kept for 2.0 to 4.0h; (5) after stopping stirring for 1.0 to 2.0h, the outlet valve on the outlet pipe is opened to drain water and aeration supply is stopped; (6) steps (3) to (5) are repeated to carry out the sequencing batch sewage treatment.The invention is characterized by good sewage treatment effect.

The invention provides a multi-point water feeding town sewage treatment system and a treatment method thereof so as to overcome the problems of sludge age contradiction between nitrobacteria and phosphorus-accumulating bacteria and competition for a carbon source among different populations of microbes in a traditional A2/O process and to improve nitrogen and phosphorus removal effects of process operation. The multi-point water feeding town sewage treatment system provided by the invention comprises a raw water tank. The raw water tank is respectively connected with an anaerobic tank and an anoxic tank through peristaltic pumps; a water outlet of the anaerobic tank and a water outlet of the anoxic tank are connected with an aerobic tank, and a water outlet of the aerobic tank is connected with a sedimentation basin; a nitrification liquid outlet of the aerobic tank is connected with a nitrification liquid return pipe and the anoxic tank through peristaltic pumps; the lower part of the sedimentation basin is respectively connected with a sludge discharge pipe and a sludge return pipe through valves, and the sludge return pipe is connected with the anaerobic tank through one peristaltic pump; the lower part of the aerobic tank is connected with an air compressor through an aerator pipe; and the interiors of the anaerobic tank and the anoxic tank are respectively provided with a stirrer.

The invention relates to a system and a method for removing phosphorus by three-mud process nitrification and denitrification. The system comprises a pretreating unit, an anaerobic unit, a middle precipitation unit, a primary aeration biological nitrification unit, an anoxic unit, a secondary precipitation unit and a secondary aeration biological nitrification unit. The method comprises the following steps that: after being precipitated in the pretreating unit for removing oil, the primary water enters an anaerobic pool with returned sludge to anaerobicly release the phosphorus; microorganisms absorb polyhydroxyrate (PHB) in a dissoluble organic compound body in the water; after muddy water is precipitated in a middle precipitation pool, a supernatant enters the primary aeration biological nitrification unit and an effluent and sludge in the middle precipitation pool enter an anaerobic pool to undergo denitrification and dephosphorization; and after mixed solution in the anaerobic pool is separated in a secondary precipitation pool, the supernatant enters the secondary aeration biological nitrification unit for further treatment, wherein one part of the sludge is reclaimed and theother parts of the sludge are discharged as remaining sludge. The system of the invention is small in occupied area and low in basic construction and operation costs. For low-carbon and nitrogen urban sewage, the effluent of the system can stably meet the first grade A standards of Urban Sewage Disposal Plant Contamination Integrated Discharge Standard.

This invention relates to a wastewater treatment apparatus, especially UCT-broken line flow membrane bioreactor for reclaimed water reuse. The apparatus comprises: a float valve, a punched aeration tank, a liquid flow meter, a gas flow meter, a vacuum pressure gauge, a hollow fiber membrane module, a diving reflux pump, a single-stage self-priming pump, an electronic stirrer, an aeration pump, an ORP potential tester, am oxygen dissolution tester, a water storage tank, and an adjusting pool. The membrane bioreactor is divided into an anaerobic zone, an anoxic zone and an aerobic zone at a volume ratio of 1:1:4. Two partition boards are set in the aerobic zone. The ORP probe can monitor the redox potential of the anaerobic zone and the anoxic zone, and broken line flow mode of water flow in oxygen dissolution reactor in the aerobic zone. A dump pump is used to pump water into the water storage tank via the membrane module.

The invention discloses a photoelectric artificial wetland which comprises an underflow artificial wetland and a photovoltaic power supply system, wherein wetland plants are grown on the underflow artificial wetland; a negative plate and a positive plate are arranged inside the underflow artificial wetland; electrolysis, modification and electric-biological catalysis coupled reaction regions are arranged between the negative plate and positive plate; the negative plate and positive plate are connected with the photovoltaic power supply system; and a filler in the underflow artificial wetland comprises macadam and biomass carbon. The invention also discloses application of the photoelectric artificial wetland in the aspect of sewage denitrification and dephosphorization. Compared with the prior art, the photoelectric artificial wetland combines the artificial wetland technique and electrochemical technique with the modified biomass carbon technique, and avoids the problem of secondary pollution of electrolytic ions in the water body on the premise of obviously enhancing the denitrification and dephosphorization effects of the artificial wetland, thereby having very high practical application and popularization values.

The invention belongs to the technical field of environmental protection and recycling and relates to a method for promoting anaerobic sludge fermentation to produce short-chain fatty acids. The method comprises the following steps of: (1) putting sludge into a container, discharging the supernatant liquid, and obtaining a sludge sample; and (2) adding reduced iron powder into the sludge sample, filling nitrogen for oxygen displacement in a reactor, sealing the reactor, uniformly mixing substances in the reaction system, controlling the fermentation temperature, and performing anaerobic fermentation. The sludge can be effectively reduced, the environmental pollution is reduced, the sludge can be recycled, and lots of short-chain fatty acids with high utilization values are produced.

The present invention discloses an urban domestic sewage treatment method, which comprises: filtering, first pH value adjustment, second pH value adjustment, treatment in an anaerobic tank, treatment in an anaerobic tank, treatment in an aerobic tank, water discharging, and other steps. According to the present invention, the urban domestic sewage treatment method has characteristics of simpleness, practicality, convenient management and good sewage treatment effect, can meet the standard requirements, and is suitable for popularization and application.

The invention provides a method utilizing sludge anaerobic fermentation to produce fatty acid. The method comprises the following steps: taking sludge obtained from sewage treatment as a raw material; removing the supernatant after natural settlement to obtain a sludge sample, mixing the sludge sample and alkyl glycoside serving as a surfactant, and fermenting the mixture in the anaerobic environment to produce the fatty acid. The method can prevent the sludge sample from producing methane and improve the organic acid production capability of the sludge sample; the obtained organic acid can be continually applied in the sewage treatment process to improve the effect in removing nitrogen and phosphorus from sewage, so that reduction, harmlessness and recycling of sludge treatment can be realized.

The invention discloses an MSBR (Modified SBR) nitrogen and phosphorus removal technique based on an MBBR, and belongs to the technical field of sewage treatment. The technique is based on a system consisting of seven units, including a sludge concentration area, a hypoxic preconditioning area, an anaerobic area, an anoxic zone, an aerobic MBBR area, a sequencing batch reaction I area and a sequencing batch reaction II area, wherein suspended packing is all dropped into the aerobic MBBR area, a medium hole perforating aeration system is arranged at the bottom of the aerobic MBBR area, a water distribution system is arranged at a water inlet, and an interception screening system is arranged at a water outlet. According to the MSBR nitrogen and phosphorus removal technique based on the MBBR disclosed by the invention, the advantages of an MSBR technique and the MBBR technique are combined, the technique has the advantages of high volume load and stable effluent effect, and is suitable for carrying out update or capacity increasing transformation on the original MSBR technique, so that the treatment capability of the existing technique is promoted, and meanwhile, the technique is applied to new construction items, so that the occupied area can be greatly reduced.

The invention provides a synchronous denitrification dephosphorization method for domestic sewage with a low carbon nitrogen ratio. The method comprises the steps that the to-be-treated domestic sewage is subjected to intermittent aeration by being inoculated with aerobic granular sludge, and after the aeration, the to-be-treated domestic sewage continuously passes through the aerated sludge, wherein the intermittent aeration comprises a first stage aeration, a second stage aeration and a third stage aeration, the dissolved oxygen concentrations after the first stage aeration, the second stage aeration and the third stage aeration are reduced sequentially, and the running time of each stage aeration is not less than 7d. According to the method, dissolved oxygen concentration gradient differences exist from the surface to the interior of the aerobic granular sludge, and an 'aerobic-anoxic-facultative anaerobic' regional microenvironment is formed, so that microreaction conditions are provided for synchronous denitrification dephosphorization of the domestic sewage with the low carbon nitrogen ratio; in addition, the aeration quantity is reduced gradually, so that the entrapment of a nitrite bacteria microbial population and shortened synchronous nitrification and denitrification are ensured; and the method realizes rapid synchronous nitrification and denitrification coupled dephosphorization and efficient synchronous denitrification dephosphorization.

The invention relates to a 'main-auxiliary' activated sludge method for coupling deodorization and strengthening nitrogen and phosphorus removal. A main line adopts traditional activated sludge and adeformation process thereof, and in an 'auxiliary' line, a sludge micro-screen filter, a side-flow sludge biological culture tank (S2HBR) filled with a strain culture tank (SBIO-A) and a side-flow activated sludge anaerobic hydrolysis tank (S2ASH) reactor are arranged in an activated sludge return line; an auxiliary line reaction tank S2HBR and S2ASH tank can be connected in parallel or in series.The method can directionally enrich, and significantly improve and optimize a flora structure of the activated sludge, 'main-auxiliary' reactor combination achieves the directed cultivation of specific microorganisms through a side-flow reactor on the 'auxiliary' line and conducts functional microbial inoculation on a main biochemical system on the 'main line', and the 'main-auxiliary' reactor configuration can achieve deep denitrification and dephosphorization of the biochemical system, and significantly improve the deodorization effect of the whole process, while saving commercial carbon sources and achieving activated sludge In situ process reduction.

The invention discloses an ultrasonic-assisting nitrogen and phosphorus removing process. The ultrasonic sludge treatment is additionally arranged at the tail end of a secondary settling tank or a concentration tank, and ultrasonically-treated sludge reflows to an anaerobic tank, an anoxic tank or an SBR (Sequencing Batch Reactor) tank. By adopting an ultrasonic sludge treatment technology and utilizing that residual sludge or concentrated sludge reflows to an anoxic section after the ultrasonic radiation treatment, the invention successfully solves the problems of insufficient carbon sources in the biological nitrogen and phosphorus removing process, greatly reduces the operation cost, and achieves the aim of enhancing biological nitrogen and phosphorus removal.

The invention relates to improvement of the existing three-segment biological denitriding process for sewage and provides a three-segment biological treatment process and device for sewage. The process is characterized in that an anaerobic phosphorous-releasing treatment unit is added before the three-segment biological denitriding process is carried out, and another water intrusion mixed unit isadded before denitrification is carried out. The treatment device is characterized in that an aeration nitration-segment sedimentation basin and an aeration-segment sedimentation basin which are in three-segment biological treatment are alternatively arranged at two ends, the other treatment unit pools are arranged between the two sedimentation basins and are subjected to series connection and parallel connection combination according to a treatment process flow, and simultaneously, the head and tail units of the treatment process are arranged in adjacency. By the process and device, the advantage of high-efficiency denitriding when the original three-segment biological treatment device conducts piecewise control and operation is retained, and a dephosphorization function is increased at the same time; enough carbon sources required for denitrification reaction are ensured by back-segment water ingress in no need of additionally supplementing and adding the carbon source, thereby reducing operation 5%-10% of operation cost; a structure that the sedimentation basins are arranged at the two ends, series connection and parallel connection treatment units are arranged in the middle isadopted, thereby saving occupied area and construction investments to the greatest extent, and under the same water treatment amount, the occupied area can be saved by about 20%, and the constructioninvestment of the treatment pool can be saved by about 15%.

The invention discloses a treatment method for low-carbon-source domestic wastewater, wherein the domestic wastewater is treated through a dual-membrane process of anaerobic hydrolysis of a biological membrane zeolite and a fluidized ceramsite biological membrane filter, that is to say, the natural zeolite which is cultured by a biological membrane is taken as a filler to decompose organic matters hard to degrade in the wastewater into low molecular weight organic matters easy to degrade through the metabolism of anaerophyte, then the ceramsite is taken as a carrier to conduct aerobic treatment, and the biological membrane formed on the surface of the ceramsite fully degrades the organic matters in the wastewater. According to the invention, the carbon source in the wastewater is effectively utilized, so that a good nitrogen and phosphorus removal effect is achieved without adding any organic carbon source trophoplasm in the treatment of the low-carbon-source domestic wastewater.