316results about How to "Lower Disposal Costs" patented technology

The invention discloses an autotrophic nitrogen removal method for biological phosphorus removal of urban sewage based on short-cut denitrification for providing nitrite. The method comprises the following steps: firstly feeding urban sewage into an anaerobic zone of a biological phosphorus removal nitrogen removal reactor, wherein short-cut denitrification is firstly carried out on denitrifying bacteria on a biological membrane so as to reduce nitrate nitrogen in return sludge to nitrite nitrogen, anaerobic ammonium oxidation bacteria on the biological membrane further convert nitrite nitrogen and nitrite nitrogen into nitrogen while anaerobic phosphorus release is carried out on phosphorus-accumulating bacteria in floc sludge; then feeding the sewage into the anaerobic zone again, wherein short-cut denitrification is carried out on the denitrifying bacteria on the biological membrane so as to reduce nitrate nitrogen in return sludge to nitrite nitrogen, and anaerobic ammonium oxidation bacteria on the biological membrane further convert nitrite nitrogen and nitrite nitrogen into nitrogen; then feeding the sewage into an aerobic zone and ammonia oxidizing bacteria and nitrite oxidizing bacteria in the floc sludge oxidize residual ammonia nitrogen in the sludge to nitrate nitrogen; and finally, implementing residual phosphorus removal and autotrophic nitrogen removal of urban sewage of a continuous flow, wherein the treatment energy consumption of an urban sewage plant is reduced.

The invention relates to a processing method of stainless steel cold rolling pickling wastewater. The pickling wastewater enters a hexavalent chrome secondary reduction pool after the actions of micro-electrolysis and hexavalent chrome preliminary reduction of a scrap iron filtering pool; the reduced wastewater enters a front-segment precipitation tank after neutralization and aeration, heavy metal sludge is concentrated and dehydrated, and the heavy metal sludge and scrap iron after the use of the scrap iron filtering pool are recycled and used as stainless steel smelting raw materials; middle-segment precipitation is carried out after a primary supernatant acts with a precipitant, and dehydrated and dried fluoride sludge is recycled and used as a metallurgical adjuvant material; final-segment precipitation is carried out after a secondary supernatant continues to act with a flocculating agent to obtain calcium salt which can be used as a building material raw material; and after the three segments of precipitation of acidic wastewater, the final third level supernatant reaches a standard and is discharged through water quality regulation and sand filtering. The invention has the advantages of less investment, low wastewater processing cost, convenient maintenance and the like, and not only can effectively utilize discarded scrap iron of a stainless steel enterprise, but also can greatly lower the subsequent wastewater processing cost and the operating load.

The invention provides a method for achieving partial short-cut nitrification-Anammox / denitrification of sewage by using sludge fermentation materials, and belongs to the field of treatment of sewagesludge. A device used by the method comprises a raw water tank, an SBR reactor, a sludge fermentation material storage tank and a residual sludge fermentation tank. The method comprises mixing residual sludge fermentation materials with domestic sewage for treating, and achieving the short-cut nitrification by using the sludge fermentation materials, wherein the inhibition of the sludge fermentation materials on nitrite oxidizing bacteria is far greater than the inhibition of the sludge fermentation materials on ammonia oxidizing bacteria. The method is specifically characterized in that in ananaerobic phase, polyphosphate accumulating bacteria are used for releasing phosphorus by using the sludge fermentation materials and carbon sources in raw water, and storing the inner carbon sources, in an aerobic phase, the partial short-cut nitrification is achieved through real-time control on DO and pH, in an anoxic phase, anaerobic ammonia oxidizing bacteria are used for converting ammonianitrogen and nitrite nitrogen into nitrogen and nitric nitrogen, and heterotrophic bacteria are used for reducing residual nitrite nitrogen and the generated nitric nitrogen into nitrogen by using theinner carbon sources. Through the method, the aeration intensity is reduced; meanwhile, the deep denitrification of the domestic sewage with a low C / N ratio and the reduction of exogenous sludge areachieved.

The invention discloses a low-carbon urban sewage biological phosphorus removal and autotrophic biological nitrogen removal device and a low-carbon urban sewage biological phosphorus removal and autotrophic biological nitrogen removal method. The device comprises a raw water tank, a biological phosphorus removal and half shortcut nitrification reactor, a secondary sedimentation tank, an intermediate water tank and an anammox reactor, wherein the biological phosphorus removal and half shortcut nitrification reactor is a university of cape town (UCT) reactor without internal returning of digestive fluid; the secondary secondary sedimentation tank is a radial-flow sedimentation tank; and the anammox reactor is an upflow anaerobic sludge blanket (UASB) reactor. The method comprises: introducing urban sewage first to the anaerobic zone of the biological phosphorus removal and half shortcut nitrification reactor for phosphorus release, then to an anoxic zone of the biological phosphorus removal and half shortcut nitrification reactor for denitrification and phosphorus absorption and finally to an aerobic zone for aerobic phosphorus absorption and half shortcut nitrification; subjecting mixed liquid containing ammonia nitrogen and nitrite nitrogen to sludge and water separation in the secondary sedimentation tank; and introducing the water to the anammox UASB reactor for autotrophic biological nitrogen removal under anammox action. When the method is used, process aeration can be reduced, energy consumption can be reduced, and carbon source is saved. The method is suitable for treating low-carbon sewage.

The invention discloses a device and a method for sectional water inlet A2 / O process intensified biological nitrogen and phosphorus removal, and belongs to the field of sewage treatment. The device consists of a raw water tank (1), a sectional water inlet A2 / O tank (6) and a secondary sedimentation tank (14) which are connected in sequence. The method comprises the following steps: by feeding packing with anaerobic ammonium oxidation bacteria into anoxic zones and controlling a raw water C / N ratio and average hydraulic retention time of the anoxic zones, performing phosphorus dilution of an anaerobic zone (8), performing phosphorus absorption of an aerobic zone (10), and performing denitrification through partial denitrification anaerobic ammonia oxidation reaction on anaerobic ammonium oxidation bacteria on the packing of a first anoxic zone (9) by using nitrate nitrogen in recycled nitrification liquor and ammonia nitrogen in fed water; controlling dissolved oxygen of a first aerobic zone (10) to achieve semi-partial nitrification, providing a substrate nitrous to denitrification and anaerobic ammonia oxidation with nitrous as a substrate in a second anoxic zone (11), and performing whole-process nitration reaction and aerobic phosphorus accumulation reaction in an aerobic zone (12), thereby achieving nitrogen and phosphorus removal of municipal sewage, wherein the ammonia nitrogen used in the device and the method is provided from residual semi-partial nitrification ammonia nitrogen and second-stage fed water.

An integrated in-situ denitrification culture wastewater biological treatment device and treatment method relate to a sewage treatment device and treatment method. The invention aims to provide a treatment device and treatment method with low sludge yield, no refluxing process and good ammonia nitrogen treatment effect. The treatment device comprises a pool body, wherein the inside of the pool body is divided into an anaerobic carbon-removing area, an aerobic nitrification and precipitation area and an anoxic denitrification area through a plurality of partition plates; the aerobic nitrification and precipitation area comprises an aerobic aeration chamber, a precipitation chamber and the forth falling compartment; the anaerobic carbon-removing area is communicated with the upper part of the forth falling compartment, the bottom of the forth falling compartment is communicated with the bottom of the aerobic aeration chamber; the bottom of the aerobic aeration chamber is provided with an aeration device, the bottom of the aerobic aeration chamber is communicated with the bottom of the precipitation chamber; one side close to the precipitation chamber, of the middle part of the aerobic aeration chamber is provided with a stream-separating plate longitudinally; the stream-separating plate is used to form a stream-separating channel between the aerobic aeration chamber and the precipitation chamber; and the upper end of the stream-separating channel is communicated with the aerobic aeration chamber, and the lower end is communicated with the precipitation chamber.

The invention provides a method for treating sludge digestive liquid by coupling anaerobic ammonia oxidation and anaerobic methane oxidation, and belongs to the technical field of wastewater treatment. The method comprises the steps that anaerobic digested sludge is inoculated into an anaerobic methanogenic reactor, partial nitrification sludge is inoculated into a partial nitrification reactor, and anaerobic ammonia oxidation and denitrification-type methane anaerobic oxidation bacterium symbiotic bacterium group sludge is inoculated into an anaerobic ammonia oxidation coupled anaerobic methane oxidation reactor; firstly the sludge digestive liquid enters the anaerobic methanogenic reactor, after water quality of yielding water is adjusted by a middle water tank, the yielding water enters the partial nitrification reactor, and the nitrosation process is realized by controlling aeration time; finally the water quality of yielding water is adjusted by the middle water tank, the yielding water enters the anaerobic ammonia oxidation coupled anaerobic methane oxidation reactor, meanwhile, methane generated by the anaerobic methanogenic reactor is used for aeration, and the autotrophic nitrogen removal process is completed with the help of anaerobic ammonia oxidation bacteria and anaerobic methane oxidation bacteria. The method can be used for solving the problems of insufficient organic carbon source, relatively low C / N ratio, release of greenhouse gases and the like existing in a sludge digestive liquid nitrogen removal treatment process.

The invention relates to a method for improving dehydration performance of residual sludge by assisting oxidization of ferrate by utilizing ultrasonic waves and belongs to the technical field of sludge processing. The method comprises the following steps of: introducing concentrated sludge into a conditioning tank, and adding dilute sulfuric acid or dilute nitric acid into the conditioning tank while stirring, so as to enable the pH of the sludge to be 2.5-3.5; adding potassium ferrite under the action of the ultrasonic waves, adding calcium hydroxide into the reacted sludge and carrying out stirring, and regulating the pH to 6-7, wherein the adding amount of the ferrate (namely the mass ratio of the ferrate to the residual sludge) is ((0.5-2)*10<3>):1, the ultrasonic frequency is 20-40 kHz, the energy density of sound of a dry basis is 1000-3000 KJ / kg, and the action time is 60-90 seconds; carrying out mechanical dehydration on the processed sludge by utilizing a belt press-filter or centrifugal dehydration method, so as to obtain the dehydrated sludge with the water content of 70-75%. According to the method disclosed by the invention, the filtering specific resistance of the sludge can be reduced, the solid content of a mud cake can be increased, the reaction efficiency can be improved, the reaction time can be shortened, the processing capacity can be improved, and the sludge treatment cost can be lowered.

The invention relates to an AAO continuous-flow aerobic granular sludge nitrogen and phosphorus removal process. Intake water enters a biochemical tank after passing coarse and fine screens and a primary settling tank, the biochemical tank comprises an anaerobic tank, an anoxic tank and an aerobic tank, part of effluent of the biochemical tank flows back to the front end of the anoxic tank, the other part enters a secondary sedimentation tank for mud-water separation, the secondary sedimentation tank is a dual-region sedimentation tank, light sludge is collected prior to direct concentrating, drying and outward transportation for disposal, heavy sludge is collected, then part of the heavy sludge serves as excess sludge flowing back to the front end of the anaerobic tank, the other part is dried and crushed to be put to the front end of the biochemical tank, and effluent of the secondary sedimentation tank passes a disinfection apparatus prior to up-to-standard discharge. The invention further relates to an AAO continuous-flow aerobic granular sludge nitrogen and phosphorus removal system. Granulation of aerobic sludge is promoted, carbon sources are supplemented to denitrification for promoting nitrogen removal, and biological phosphorus removal is enhanced.

The invention discloses a device and method for treating low-carbon-nitrogen-ratio urban sewage by virtue of half nitrification / partial denitrification / anaerobic ammonium oxidation, belonging to the field of sewage treatment. The device comprises an urban domestic sewage tank, a half nitrification reactor, a first intermediate water tank, a partial denitrification reactor, an external carbon source storage tank, a partial denitrification online monitoring and control system, a second intermediate water tank and an anaerobic ammonium oxidation reactor. The method comprises the following steps: firstly introducing domestic sewage into the half nitrification reactor, oxidizing part of ammonia nitrogen in the domestic sewage into nitrate nitrogen by virtue of aeration, introducing effluent into the partial denitrification reactor, reducing nitrate into nitrite by using a small amount of an external carbon source, and introducing the effluent into the anaerobic ammonium oxidation reactor for denitrification. By adopting the device and the method disclosed by the invention, stable and efficient denitrification of the low-carbon-nitrogen-ratio urban sewage can be achieved, and the problems that the existing short-cut nitrification nitrite accumulation of the urban domestic sewage is unstable and an existing anaerobic ammonium oxidation process is low in denitrification efficiency can be solved.

The invention relates to a printing and dyeing wastewater pretreatment method based on an anoxic zone phase separation technology. According to the printing and dyeing wastewater pretreatment method, an anoxic zone is divided into a phase I and a phase II, namely a phase for hydrogen production and acid production through fermentation and a methanogenesis phase; an electron donor is provided by organic matters in the wastewater, and dye is effectively decolored in the phase I by using a sulfate reducing process and the reducing capacity of reduzate, namely the sulfide, therefore the biodegradability of the wastewater is improved; and the organic matters can be efficiently removed in the phase II. As an anoxic phase transformation technology in the printing and dyeing wastewater treatment course, the printing and dyeing wastewater pretreatment method is used for providing a two-phase anoxic system and carrying out pretreatment on the printing and dyeing wastewater; the chromaticity and the COD (Chemical Oxygen Demand) removal rates can be effectively increased, the biodegradability of the wastewater can be greatly improved, and the defects that a traditional anoxic process is instable in treatment effect, large in sludge yield and the like are overcome. The printing and dyeing wastewater pretreatment method can be used for effectively removing chromaticity and COD in the printing and dyeing wastewater, the removal rates of the chromaticity and the COD respectively reach more than 95 percent and 60 percent, and the organic loading to subsequent procedures is greatly reduced.

The invention discloses a biological denitrification and phosphorus removal device and method based on the DEAMOX reinforced A <2> / O+ biological contact oxidation process and belongs to the field of activated sludge process waste water treatment. The device is formed by mainly connecting a water tank (1), an A <2> / O reaction device (3), a secondary sedimentation tank (11) and a biological contact oxidation reaction device (12) in sequence. According to the method, the average hydraulic retention time (HRT) of an anoxic area is controlled under the low C / N ratio condition so that short-cut denitrification can be achieved, reaction substrate nitrite nitrogen is provided for anaerobic ammonia oxidizing bacteria, growing carriers are provided for the anaerobic ammonia oxidizing bacteria by feeding biological filler (9) in the anoxic area (5), the function of the anoxic area (5) in the A <2> / O+ biological contact oxidation process is changed, and deep denitrification and phosphorus removal of municipal waste water are achieved by reinforcing short-cut denitrification and Anammox (anaerobic ammonium oxidation reaction) on the basis of original denitrification. The biological denitrification and phosphorus removal device and method are applicable to low-carbon-nitrogen-ratio city waste water treatment, the quality of effluent water is stable, and the energy conservation and consumption reduction advantages are obvious.

The invention discloses a composite HBF (Honess Hybrid Biological&Fixed film Technology) module reactor which comprises an anaerobic pool, an anoxic pool, an aerobiotic pool and an SBR (Sequencing Batch Reactor) pool, wherein the SBR pool comprises a first SBR pool and a second SBR pool which are connected with the aerobiotic pool at the same time. The aerobiotic pool, the first SBR pool and the second SBR pool are internally provided with enzyme floating fillers, respectively. The anaerobic pool, the anoxic pool, the aerobiotic pool, the first SBR pool and the second SBR pool are module members. The invention further provides a sewage treatment process. Based on AAO-SBR (Anaerobic-Anoxic-Oxic-Sequencing Batch Reactor), the aerobiotic pool, the first SBR pool and the second SBR pool are internally provided with enzyme floating fillers respectively as biological attaching carriers, so that the biomass of the reactor is more than 2 times of that by an activated sludge process in volume, thereby greatly enhancing the processing capacity of the reactor and simplifying the structure of the reactor.

The invention discloses a device and a method for a low-C / N ratio municipal wastewater short-cut denitrification / short-cut nitrification anaerobic ammonia oxidation biofilm process, belonging to the field of biological sewage treatment. The method comprises the following steps: allowing municipal wastewater and one part of supernatant subjected to short-cut nitrification anaerobic ammonia oxidation in the previous cycle to simultaneously enter a short-cut denitrification bio-membrane reactor, performing anaerobic stirring, performing short-cut denitrification by fully utilizing a carbon source in raw water, and reducing NO3<-> into NO2<->, so that the influence of organic matters in the raw water on microbes in the subsequent short-cut nitrification anaerobic ammonia oxidation bio-membrane reactor; and pumping the supernatant containing NH4<+> and NO2<-> into the short-cut nitrification anaerobic ammonia oxidation bio-membrane reactor through a peristaltic pump for carrying out an anaerobic ammonia oxidation reaction, performing short-cut nitrification and anaerobic ammonia oxidation on the residual NH4<+> in an intermittent aeration and intermittent stirring manner, and finally draining. According to the method disclosed by the invention, the carbon source does not need to be added, advanced nitrogen removal of the low-C / N ratio municipal wastewater is realized, and the method has the advantages of energy consumption, small treatment amount of residual sludge, and the like.

The invention discloses a biological denitrification and phosphorus removal device and method based on the DEAMOX reinforced A2 / O+BAF biological process and belongs to the field of activated sludge process waste water treatment. The device is formed by mainly connecting a water tank (1), an A2 / O reaction device (3), a secondary sedimentation tank (11) and a biological aerated filter BAF (21) in sequence. According to the method, the average hydraulic retention time (HRT) of an anoxic area is controlled under the low C / N ratio condition so that short-cut denitrification can be achieved between 3 h and 6 h, reaction substrate nitrite nitrogen is provided for anaerobic ammonia oxidizing bacteria, growing carriers are provided for the naerobic ammonia oxidizing bacteria by feeding biological filler (8) in the anoxic area, the function of the anoxic area (5) in the A2 / O+BAF process is changed, and denitrification and phosphorus removal of municipal waste water are achieved by reinforcing short-cut denitrification and Anammox (anaerobic ammonium oxidation reaction) on the basis of original denitrification. The biological denitrification and phosphorus removal device and method are applicable to low-carbon-nitrogen-ratio municipal waste water treatment, the quality of effluent water is stable, and the energy conservation and consumption reduction advantages are obvious.

The invention discloses a comprehensive zoning treatment method for soil heavy metal pollution. The method sequentially includes the steps of zoning monitoring, pollution level identification, polluted area site leveling, soil heavy metal pollution disposal and evaluation monitoring, and specifically includes the steps that monitoring items and divided areas are determined according to soil environment quality standards; the pollution levels of all the areas are determined by conducting sampling analysis on polluted areas and surrounding pollution influence areas, and existing buildings and terraces in the polluted areas are dismantled and cleared away; the extra heavily polluted areas, the heavily polluted areas, the commonly polluted areas and the slightly polluted areas are treated; and finally, evaluation monitoring is conducted to obtain the soil heavy metal change conditions before and after the method is implemented, and the treatment effect is known in time. According to the method, the polluted areas are treated in a targeted mode, so that investment of human and financial resources for monitoring and treatment is reduced; the pollution levels are identified, the treatment areas are divided according to the pollution levels, and therefore recycling of heavy metal pollutants is facilitated, and the good treatment effect on heavy metal pollution can be achieved.

A sewage treating apparatus with denitrifying function is composed of a pool body and a covering plate with several inoculating holes and exhausting hole. Said pool with water inlet and outlet is divided into an anaerobic decarbonizing region consisting of isolated flow-up chambers containing fixed filler and flow-down chamber, an aerobic nitrifying region consisting of the aerating chamber with internal aerating unit communicated with external air compressor and the precipitating chamber, and an anaerobic denitrifying region consisting several flow-up chambers containing fixed filler and several flow-down chambers.

The invention relates to a method for cleaning filtering membrane modules, which comprises the following steps: high-pressure gas at 0.15MPa-0.5MPa with flow rate of 1L / min-10L / min and cleaning fluid at 10 DEG C-50 DEG C with flow rate of 100mL / min-1000mL / min are respectively applied to two sides of a membrane, the cleaning fluid can permeate through membrane holes under the action of pressure and bring away various contaminants attached to the walls of the membrane holes to the other side, and then is processed into small drops partially at 10m / s by high-pressure gas at the other side, so that great partial shear force is generated to continuously impact the surface of the membrane for impacting, flushing, loosening and separating the various contaminants attached on the surface of the membrane, thereby the effective cleaning effect is achieved. In the method, the specific gas-liquid mixed phase flow is fully utilized to effectively restore the intrinsic separation function of the membrane, so that the service life of the membrane is greatly prolonged and the characteristics of high efficiency, energy conservation and environment protection are achieved.

The invention provides an acid lixiviation based recycling treatment method of aluminum circulating coagulation sludge. The method is characterized by comprising the following steps of: dehydrating sludge to reduce water content of the aluminum circulating coagulation sludge to be lower than 80%; drying and baking; carrying out acidifying treatment: adding mixture of water and acid to adjust pH value of sludge slurry to 3, controlling reaction temperature to be 38 DEG C and agitating sludge and acid in mixed liquid so that the sludge and the acid sufficiently contacts; separating and purifying; and finally, filtering, evaporating and crystallizing to obtain crystal aluminum salt with a flocculation effect. According to the acid lixiviation based recycling treatment method of the aluminum circulating coagulation sludge, a large part of water and aluminum in the sludge is converted into a flocculating agent and impurities are further removed by separating to purify the flocculating agent, thereby improving the recycling of an aluminum salt flocculating agent, greatly reducing sludge disposal cost and further reducing COD (Chemical Oxygen Demand), pH value, residual organic matters and chromaticity of the sludge wastewater; and therefore, the aim of recycling is realized, the subsequence biochemical treatment is easy to implement and the damage of wastewater discharging to the environment is reduced.

The invention relates to an improved UCT step-feed efficient biological denitrification and dephosphorization device based on the DEAMOX technology and an application method and belongs to the technical field of biological sewage treatment.The technical problems of high energy consumption and high carbon source adding in a common low-carbon-source urban sewage treatment process are solved through the organic matter type denitrification ammoxidation technology.The device mainly comprises an urban sewage raw water tank, an improved UCT step-feed device and a settling pond.After inoculation of activated sludge is carried out to start the improved UCT step-feed process of an activated sludge system, a second-segment anoxic reactor and a third-segment anoxic reactor are inoculated with Anammox sponge filler, and efficient denitrification and dephosphorization of low-carbon-source urban sewage are achieved by adjusting the water intake ratios of all segments, inflow water C / N and the actual anoxic zone hydraulic retention time and enhancing the denitrification ammoxidation technology of the system.The dosage of an organic carbon source is greatly reduced while aeration energy consumption is saved, and the disposal cost of residual sludge is reduced.

The invention belongs to a multilevel processing method of waste water and a processing system thereof, and in particular discloses a processing method and a processing system for acidic waste water containing heavy metals. The invention comprises the following steps of: mixing carbon powder and scrap iron, adding modified zeolite, and placing the mixture into an inner electrolytic cell; conveying preprocessed waste water into the inner electrolytic cell, and reacting for 10 to 30 minutes under aeration condition; enabling outlet water to enter an electrochemical reaction cell directly, wherein the space between polar plates in the cell is from 0.6 to 1.4 cm, and reacting for 5 seconds to 5 minutes; and precipitating the outlet water, and separating solid from liquid. The processing system comprises a regulation cell, the inner electrolytic cell, the electrochemical reaction cell, a precipitating cell and a filtering cell which are sequentially connected, wherein the inner electrolytic cell is internally provided with a reaction bed, filter materials consisting of zeolite, carbon powder and scrap iron are filled in the reaction bed, an electrochemical reactor is installed in the electrochemical reaction cell, and a surface film filter is arranged in the filtering cell. The processing method has the advantages of wide application range, stable operation, good processing effect, low processing cost, environment protection, no pollution, and the like.

The invention discloses a natural rubber processing wastewater deep biological denitrogenation apparatus and a method thereof. wastewater firstly enters an anaerobic methane production reactor, and lots of organic matter in the wastewater is converted into CH4 to be released; then, in the low-oxygen biosorption section of an organic matter removal reactor, remaining organic matter in the wastewater is adsorbed into sludge; after sludge-water separation through a No.1 sedimentation basin, the deposited sludge part flows back to a high-oxygen bioregeneration section, organic matter in the sludgeis fully subjected to aeration and degradation, a supernatant in the sedimentation basin enters an AOAO reactor to undergo denitrification, anaerobic ammoxidation and nitration so as to achieve deepbiological denitrogenation; wastewater enters a No.2 sedimentation basin to undergo water-sludge separation, the supernatant is discharged, and part of the supernatant flows back as a nitration solution; part of deposited sludge in the No.1 and No.2 sedimentation basins enter an acid production tank to be fermented so as to generate volatile organic acid (VFAs), and a fermentation broth containingVFAs can be used as a high-quality carbon source for denitrification of the AOAO reactor. The above apparatus can reinforce deep nitrogen removal and also reduce energy consumption of the system andachieve energy recovery.

The invention relates to an A2 / O-MBR-biological contact oxidation pond dual-sludge high-efficiency denitrifying phosphorus removal device and method and belongs to the field of active sludge sewage treatment. The device mainly consists of a water tank (1), an A2 / O (3), a membrane biological reactor (9) and a biological contact oxidation pond (7) which are sequentially connected; the method is characterized in that, according to a contradiction existing in sludge age between nitrifying bacteria and phosphorus-accumulating bacteria, on one hand, the nitrifying bacteria with a longer sludge age are elutriated out of an A2 / O system by shortening the sludge age of the A2 / O; on the other hand, the nitrifying bacteria grow on biological fillers in the biological contact oxidation pond in the form of biological membranes, nitrifying reaction is fully performed, electron acceptors in the anoxic zone of the A2 / O are guaranteed to be sufficient, and necessary conditions are provided for denitrifying phosphorus removal. In addition, the A2 / O and the biological contact oxidation pond are connected through the membrane biological reactor (MBR), and a very good dual-sludge system environment is guaranteed. The A2 / O-MBR-biological contact oxidation pond dual-sludge high-efficiency denitrifying phosphorus removal device and method are applicable to low-carbon-to-nitrogen-ratio urban sewage treatment, the process is advanced, the outlet water quality is stable and the advantages of energy saving and consumption reduction are remarkable.

A device for removing nitrogen through bio-autotrophic denitrification belongs to the technical field of water purification and comprises a drug dissolving pool, a dosing pump, a nitrogen polluted water inlet pump, an upflow anaerobic sludge bed and a nitrogen escape outlet, wherein sodium thiosulfate is dissolved in the drug dissolving pool; the bottom of the drug dissolving pool is connected with the inlet pipe of the dosing pump; the outlet pipe of the dosing pump is connected with the inlet pipe of the nitrogen polluted water inlet pump; the outlet pipe of the nitrogen polluted water inlet pump is connected with the water inlet at the bottom of the upflow anaerobic sludge bed; and the nitrogen escape outlet is arranged at the top of the upflow anaerobic sludge bed to discharge gases. Without adding organic matters, the device removes the nitrate nitrogen in the nitrogen polluted water and simultaneously avoids the problem of possible accumulation of intermediate products of nitrites in the nitrate nitrogen reduction process.

The invention discloses a biochemical removal method for total nitrogen in wastewater. The method comprises the steps of primary premixing treatment, anoxic treatment, aerobic treatment, composite nitrogen removal treatment and sedimentation treatment, wherein the composite nitrogen removal treatment comprises secondary premixing treatment, nitrogen removal treatment and aeration treatment. The to-be-treated wastewater which can be treated by using the method is raw water and does not need to be diluted through water distribution, and the main water quality indexes of the raw water are as follows: CODcr<=10000mg / L, ammonia nitrogen<=800mg / L, total nitrogen<=1000mg / L, and pH=6-9. Biochemical water treated by using the method has the CODcr removal rate of 92-95%, the ammonia nitrogen removal rate of more than 99% and the total nitrogen removal rate of more than 95%.

The invention discloses a desulfurization waste water zero discharging system and a process for realizing in-house byproduct recycling treatment. The system comprises a flue gas desulfurization system, a desulfurization waste water zero discharging pretreatment system and a desulfurization waste water zero discharging advanced treatment system, wherein the flue gas desulfurization system comprises a desulfurization tower, a gypsum hydrocyclone, a vacuum belt dehydrator, a waste water hydrocyclone and a backflow water tank; the desulfurization waste water zero discharging pretreatment system comprises a raw water pit, a primary reaction tank, a primary clarifier, a secondary reaction tank, a secondary clarifier and a clean water tank which are sequentially connected; the desulfurization waste water zero discharging advanced treatment system comprises an ultrafilter, a pH adjustment tank, a nanofilter, a nanofiltration water tank, a reverse osmosis part, a concentrated water tank and a strong brine electrolyte sodium hypochlorite device which are sequentially connected. According to the system and the process provided by the invention, byproducts produced from the desulfurization waste water zero discharging system are separated according to different components, and the desulfurization waste water zero discharging system is combined with a power plant original water treatment system, so that the waste is turned into wealth, and the in-house byproduct recycling is realized.

The invention relates to a preparation method of aluminum sludge ceramsite. The preparation method comprises: drying and grinding aluminum sludge with auxiliary materials such as glass powder, egg shell and fly ash; mixing and stirring the materials uniformly; then adding water as a binder; carrying out mixing granulation to obtain green ceramsite; and then drying, preheating, sintering and cooling the green ceramsite. According to the preparation method provided by the invention, the aluminum sludge and glass powder are adopted to replace clay to provide Al2O3 and SiO2, so that the manufacturing cost of ceramsite is remarkably reduced. The manufactured ceramsite has the advantages of large specific surface area, rough surface, high porosity, few dissolved substances, high water absorptionperformance, low dissolution rate and the like, can be used for large-scale disposal of aluminum sludge in water supply plants, realizes waste utilization, and saves the disposal cost of aluminum sludge. The aluminum sludge ceramsite is widely used in secondary treatment and advanced treatment of sewage, treatment of building reclaimed water, treatment of industrial wastewater, and treatment sponge city rainwater, and has a high market application prospect.

The invention relates to a device and a method for treatment of domestic sewage with a DPR-MABR coupling reactor, and belongs to the field of wastewater treatment. The device comprises a raw water pool, a reaction pool I, a first intermediate water pool, a reaction pool II, a second intermediate water pool and a PLC (Programmable Logical Controller) control box, wherein two different series-connection systems are switched by virtue of the PLC control box, one of the series-connection system is an I-to-II series-connection system, the raw water pool is connected with the bottom of the reaction pool I by virtue of a water inlet pipe, the reaction pool I is connected with the first intermediate water pool by virtue of an I-to-II water outlet pipe, the first intermediate water pool is connected with the top of the reaction pool II by virtue of an I-to-II second water inlet pipe, and treated water is discharged from an I-to-II final water outlet pipe; the other system is an II-to-I series-connection system, the raw water pool is connected with the top of the reaction pool II by virtue of a water inlet pipe, the reaction pool II is connected with the second intermediate water pool by virtue of an II-to-I water outlet pipe, the second intermediate water pool is connected with the top of the reaction pool I, and treated water is discharged from the water outlet pipe. The device and the method have the advantages of high efficiency, energy conservation, stable nitrogen removal and dephosphorization effect and stable sludge reduction.

The invention relates to a method for treating industrial wastewater, in particular to a method for treating fermentative pharmaceutical wastewater. The method comprises the following steps of: inletting the pharmaceutical wastewater into a facultative pond; performing biochemical treatment on the pharmaceutical wastewater; and performing aerobic biological treatment on outlet water of the facultative pond by using a membrane bioreactor. The method is characterized in that: the concentration of activated sludge in the membrane bioreactor is 15,000 to 20,000 mg / L; the hydraulic retention time of the membrane bioreactor is 8 to 15 hours which is 1 / 2-1 / 4 of that of a conventional aerobic treatment process; a sludge return pump is arranged in the reactor; a sludge-water mixture in the reactor is returned to the facultative pond in a return ratio of 100 to 300 percent, so that the effect of treating persistent organic pollutant components in the fermentative pharmaceutical wastewater is improved; and a hollow fiber membrane module is used for replacing a secondary sedimentation tank to separate sludge and water. The method for treating the fermentative pharmaceutical wastewater has the advantages of less residual sludge, long sludge removing period, reduction of sludge treatment cost, simple operation, high automation degree and high capacity of resisting impact load.

The invention discloses a disposing method of organic waste water and residual mud reducing method in the dirty water disposing domain through biological technology, which is characterized by the following: the effluent disposal technology contains first-grade physiochemical disposal, aerobic segment two-grade physiochemical disposal and mud separation of two sedimentation pools; the nourishing grade of aerobic segment is divided into the following four parts from junior to senior according to food chain: bacteria dispersing growing pool, protozoa growing pool, meteorology growing pool and large-scale micro-animal growing pool; the bacteria decompose organics and the protozoa, meteorology and large-scale micro-animal reduce mud quantity to assist to decompose organics. The invention can be applied in the urban effluent disposal and industrial effluent disposal, which reduces mud quantity.