92results about How to "Improve the effect of biochemical treatment" patented technology

The invention discloses a wastewater treating microbial agent and a preparation method thereof. The microbial agent contains kocuriapalustris FSDN-A, arthrobactercreatinolyticus FDN-1, flavobacteriummizutaii FDN-2, paracoccusdenitrificans DN-3 and methylobacteriumphyllosphaerae SDN-3, wherein the collection register numbers of the five strains are respectively CGMCCNo.5061, CGMCCNo.3657, CGMCCNo.3659, CGMCCNo.3658 and CGMCCNo.3660. The microbial agent can achieve removal of ammonia nitrogen, total nitrogen and CODcr in the same reactor, has a good wastewater treatment effect, and can achieve short-cut nitrification and denitrification or simultaneous nitrification and denitrification while removing COD. Kocuriapalustris FSDN-A can utilize the two nitric oxides including nitrite nitrogen and nitric nitrogen, can ensure thorough denitrification of a wastewater treatment system, is slow in appreciation in the process of competing for substrates, is favorable for reduction of sludge, and further widens the application range of the microbial agent.

The invention relates to a method for processing organosilicon waste water. The method optimizes and combines a preprocessing unit and a biochemistry unit, aiming at the properties of high salt and difficult degradation of the organosilicon waste water. The method can process the organosilicon waste water to the second grade standard of integrated wastewater discharge standard (GB8978-1996). The organosilicon waste water is strongly acidic. A preneutralization pool is arranged at the front end of technological process and neutralizes the PH of the waste water to about 1 to 2. The waste water enters a micro-electrolysis reactor which is filled with micro-electrolysis stuffing. The effluent enters a secondary neutralization pool, and water volume and PH value are adjusted further. The waste water enters a biochemistry processing establishment and at last enters a secondary sedimentation tank. The biochemistry processing system of the waste water comprises a primary oxygen compatibility pool, a primary aerobic pool and a secondary aerobic pool. Microbial flora and relative carriers are added to the pools. The invention has the advantages that the processed organic waste water is guaranteed to meet the specified standard and the processing cost is reduced greatly. The win-win solution of economy and environment is realized.

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 discloses a device and a method for treating difficultly degraded organic waste water by a plasma technology. The device is characterized in that the device comprises a low-temperature plasma tank; a side of the low-temperature plasma tank is provided with a water distribution tank; the water distribution tank is communicated with the low-temperature plasma tank by water distribution pipes; the water distribution pipes comprises a main water distribution pipe and multiple perforated water distribution branch pipes; the perforated water distribution branch pipes penetrate transversely the low-temperature plasma tank and are hung with a metal wire mesh; a water collecting tank is arranged in the low-temperature plasma tank and is located below the metal wire mesh; a high voltage pole is arranged in the low-temperature plasma tank; the high voltage pole and the metal wire mesh are arranged at an interval; and the high voltage pole is connected with an external power supply.The method comprises the following steps of assembling all the parts of the device, enabling organic waste water to form a uniform liquid film on the metal wire mesh and to flow down, and carrying out destroy and decomposition of pollutants by active substances produced by high voltage pole discharging. The device has a small floor space, is suitable for large-scale treatment, has a high active free radical yield and can improve treatment effects of difficultly degraded organic waste water.

The invention provides an integrated sewage treatment device. A mud-water mixed solution sequentially flows through a mud-water mixing area, a primary biochemical area and a secondary biochemical area along the length direction of a box body, a part of sludge and a part of mixed solution in the secondary biochemical area are refluxed back to the mud-water mixing area by a refluxing mechanism and then return to the primary biochemical area to form a circulation, and nitrification liquid returned to the secondary biochemical area is subjected to denitrification reaction in the oxygen-deficient primary biochemical area to remove total nitrogen and improve the sewage treatment capacity. Moreover, the mud-water mixing area is arranged on the integrated sewage treatment device to ensure that refluxed sludge, inflow water and the mixed solution refluxed into the secondary biochemical area are mixed together, and then the mixture overflows out of a clapboard of the mud-water mixing area and enters the primary biochemical area, so that on the one hand, an effect of buffering water flow is achieved to ensure that liquids are mixed more fully, and on the other hand, the mud-water mixed solution flows into the primary biochemical area in the form of a line under the action of overflowing, and the retention time of the mud-water mixed solution is almost identical, so that the sewage treatment effect is stable.

The invention discloses a method for processing waste water containing phenol generated in the production process of metlbond resin; the method comprises the following steps: firstly the pH value of waste water is adjusted to 11.5 to 14 to enable the phenol in the waste water to exist in a phenol sodium type, and then the phenol in the waste water is separated by rectification. The content of phenol in the waste water containing phenol is from 20000 ppm to 50000 ppm, the pH equals to 4, and the COD equals to 140000ppm. The rectification technology of the waste water has stable production process, low energy consumption, compact equipment installation, simple operation and easy process control. The rectified waste water has strong biochemical performance, the difficulty of the biochemical treatment of the subsequent work procedures is lowered, and the capability of biochemical treatment is improved. Compared with the common method, the invention causes no secondary pollution. The waste water processed by the method of the invention has the phenol removing rate of higher than 95 percent and the rectified outlet water BOD/COD equaling to 4, belongs to the easy biochemical treatment method of the waste water containing phenol, and changes the condition of the serious pollution caused by the waste water containing phenol of the metlbond resin industry.

The invention relates to an efficient backwash method for a biofilter. The method includes: 1) a water outlet side wall, below a backwash effluent weir, of a newly constructed biofilter is provided with a long strip shaped backwash water outlet and provided with an electric water discharge device; and a water outlet side wall, below a backwash effluent weir, of a biofilter in use is provided with a rectangular or round backwash water outlet and provided with a manual water discharge device; 2) sequentially performing gas washing, gas-water washing and water washing during backwashing of the biofilter; 3) slowly descending a water discharging baffle after sewage discharging; 4) starting a backwashing motor to blow suspended solids to a suspended state; 5) starting a water inlet valve to flush sewage out of the backwash water outlet, and closing the backwash water outlet. The efficient backwash method for the biofilter has advantages that the suspended solids and aged biological membranes generated in the biofilter can be cleared and discharged outside the biofilter thoroughly on the premise that backwash water consumption is not increased; blockage and filter material caking in the biofilter can be reduced, shedding of the biological membranes due to excessive flushing of filter materials can be avoided, and accordingly biochemical treatment effects of the biofilter are improved.

The invention discloses a membrane up-flow aerobic bioreactor (MUAR), which is used for increasing the oxygen charging efficiency of the reactor through ultrafine air bubbles to lower the running energy consumption of the reactor and belongs to the technical fields of environmental engineering and sewage treatment. In the reactor, water is fed in an up-flow way; an ultrafine air bubble generating device consisting of a jet aeration spray head, a decompression cabin and a polypropylene millipore filter pipe is used for generating ultrafine air bubbles (5-10 mum in diameter) which are fully mixed with inflow water from bottom to top; the upper part of the reactor is provided with a muddy water baffle plate for isolating sludge; and outflow water reflows and enters the ultrafine air bubble generating device. Due to a small specific surface area and collision and Brownian motion among molecules, the ultrafine air bubbles can be partially precipitated in water, so that higher oxygen transfer efficiency than that of ordinary air bubbles is achieved, and the ultrafine air bubbles are better combined with sludge at the bottom of the reactor. Compared with a reactor of the same type, the reactor disclosed by the invention has the advantages that: pollutants in bottom inflow water of the reactor can be degraded effectively, and the aim of reducing running cost is fulfilled finally.

The invention relates to a microbial agent with high salt resistance. The microbial agent comprises at least one of selected from a group consisting of Paracoccus sp. FSTB-2, Microbacterium kitamienseFSTB-4 and Pseudomonas stutzeri FSTB-5, also comprises Kocuria palustris FSDN-A and Staphylococcus cohnii FSDN-C, and further comprises at least one of selected from a group consisting of Arthrobacter creatinolyticus FDN-1 and Flavobacterium mizutaii FDN-2. The invention also discloses a preparation method and application of the above microbial agent. The microbial agent can be directly used fortreating total nitrogen and COD in high-salt wastewater, and can also be added to various biochemical reaction structures to improve microbial composition, optimize the salt tolerance of a microbial system in wastewater treatment and enhance the capability of the system in removing total nitrogen and COD.

The invention discloses a biochemical treatment method of industrial wastewater and an aerobic tank. The biochemical treatment method of industrial wastewater comprises a multifunctional denitrification tank and an aerobic tank. An HSBEMBM environmental management microbial preparation is added to both the multifunctional denitrification tank and the aerobic tank; mixed liquid in the aerobic tank partially returns to the multifunctional denitrification tank, the aerobic tank is provided with a plurality of return openings in the flow direction of the aerobic tank and the return openings are all communicated with return pipelines, wherein the return opening at the tail end is normally open. The aerobic tank adopts an S-shaped corridor so that water flows in the corridor. The aerobic tank is mainly responsible for decarburization and partial nitrification. The plurality of return openings are arranged in the corridor in the aerobic tank so that the return positions and return quantity are adjusted according to the inlet water quality and the operation condition of the whole system. Due to arrangement of the return openings, the different return positions and return quantity can be adjusted in time during the implementation process; therefore, high-efficiency denitrification is realized and COD is removed; moreover, the denitrification efficiency and the buffer resistance of the system are improved.

The invention relates to an anaerobic particle sludge rapid culture method suitable for oil refining and chemical engineering wastewater treatment. The method comprises the following steps: 1, domesticating: taking facultative sludge of a sewage treatment field biochemical technology as inoculation sludge, adopting a sodium acetate solution as an organic matrix in the initial culture stage, adding oil refining and chemical engineering wastewater to the organic matrix with the implementation of culture, and increasing the blending proportion of the oil refining and chemical engineering wastewater until the oil refining and chemical engineering wastewater is used as the complete organic matrix for culture; and 2, granulating: adding an polymer and turfy soil to domesticated anaerobic sludge in batches to promote granulation of the anaerobic sludge. The cultured anaerobic particle sludge obtained through the method has high concentration of microbes, large concentration and particle size, high organic volume load and hydraulic load, strong water quality and environment condition impact resistance and high organic pollutant degradation efficiency, and is especially suitable for anaerobic biochemical treatment of high concentration wastewater in the fields of petroleum and chemical engineering.

The invention belongs to the field of chemical waste water treatment, in particular to a micro-electrolysis treatment technology for chemical waste water. The method comprises the five steps of pretreatment of the waste water, homogenizing treatment of the waste water, biochemical treatment, precipitation and discharge and sludge treatment. According to the micro-electrolysis treatment technology for the chemical waste water, before the biochemical treatment of the waste water, the pretreatment steps of micro-electrolysis, coagulation precipitation, photo-catalytic oxidation and the like are conducted, wherein chromophoric groups and auxochrome groups in the waste water are removed through the micro-electrolysis treatment to achieve a discoloration purpose, so that compositions of the waste water are converted to be likely to occur biochemical reactions, and the biodegradability is greatly improved. Through the coagulation precipitation treatment, Fe(OH)2 and Fe(OH)3 are generated and precipitated with nascent-state Fe<2+> and Fe<3+> in alkaline environment; in cooperation with a flocculant PAM, original suspended solids, colloid, oil and the like and partial water-soluble organic matter in the waste water are gathered, adsorbed and condensed in order to be separated and precipitated from the waste water. Through the adoption of the photo-catalytic oxidation, the removal rate of the organic matter in the waste water reaches 40% or above, the B/C is increased to 0.4 or above, and favorable conditions are created for the subsequent biochemical treatment.

The invention belongs to the field of wastewater treatment, in particular relates to a biochemical treatment process of nitrocotton acidic wastewater, and is used for solving the technical problems of low biochemical efficiency, high cost and low discharge standard of a treatment method at present. According to the technical scheme, the biochemical treatment process comprises the following steps: feeding the nitrocotton acidic wastewater into an adjusting tank, neutralizing in a neutralizing tank, settling in a settling tank, adding neutral wastewater, enabling the wastewater to flow to an adsorption tank, discharging the wastewater to a setting tank I together with active sludge water in the adsorption tank, enabling supernatant in the settling tank I to flow into an aerobic tank 1# for treatment, enabling the supernatant to flow into a settling tank II for settling together with active sludge water in the aerobic tank 1#, enabling supernatant in the settling tank II to flow into an aerobic tank 2# for treatment, settling in a settling tank III, and discharging. According to the biochemical treatment process, the overall biochemical treatment effect is remarkably improved and the operating cost is greatly reduced.

The invention relates to the field of wastewater treatment systems, and especially relates to a low-concentration refractory chemical wastewater treatment method and system. The method comprises the following steps: collecting and adjusting wastewater, and adding activated carbon powder and magnetic iron powder into a pool; carrying out heterogeneous catalytic oxidation: carrying out heterogeneouscoupling catalytic oxidation through ozone, hydrogen peroxide, activated carbon powder and magnetic iron powder; carrying out biological adsorption oxidation; and carrying out magnetic coagulative precipitation. According to the low-concentration refractory chemical wastewater treatment method, physicochemical and biochemical combined treatment is adopted, the activated carbon/magnetic iron powder penetrates through the whole system process, the whole-process adsorption micro-electrolysis environment is achieved, the treatment effect is enhanced, pollutants are enriched in a limited mode by adding the activated carbon/magnetic iron powder into the water collection adjusting tank, and subsequent stage treatment is facilitated.

The invention discloses a biomass gasification wastewater treatment method and device. The treatment method comprises the following steps: (1) pretreatment: performing oil removal treatment, first coagulation treatment, flotation treatment and first ozone oxidation treatment on biomass gasification wastewater to obtain first effluent water; (2) biochemical treatment: sequentially performing anaerobic treatment and A/O (anoxic/oxic) biological catalytic oxidation treatment on the first effluent water, and collecting second effluent water; and (3) advanced treatment: sequentially performing second coagulation treatment and membrane separation treatment on the second effluent water to obtain up-to-standard effluent water. The device comprises an oil removal device, a first coagulation device, a flotation device, a first ozone oxidation treatment device, an anaerobic treatment device, an A/O biological catalytic oxidation device, a second coagulation device and a membrane separation device which sequentially communicate with each other. The method and device have the characteristics of favorable wastewater treatment effect and high anti-shock loading capability, and can effectively treat biomass gasification wastewater; and the treated effluent water has favorable water quality.