103results about How to "Reduced oxygen demand" 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 discloses a sludge dephosphorizing and denitrifying biological disposing method, which comprises the following parts: adsorbing pool, sedimenting pool, regenerating pool, selecting pool, dephosphorizing pool, nitrated pool, denitrifying pool and hydrolytic acidifying pool, wherein the effluent enters in the adsorbing pool firstly to blend with reflux sludge in the selecting pool; the blending liquid is drained from adsorbing pool to sedimenting pool to separate mud from water; the supernatant enters into nitrated pool to denitrify in the denitrifying pool to drain; the sediment part of sludge is proceeded anaerobic hydrolysis in the hydrolytic acidifying pool; the supernatant is inputted into dephosphorizing pool to proceed chemical dephosphorizing; the other part of sediment pool refluxes sludge into selecting pool under anaerobic environment; the composite liquid from selecting pool is input in the regenerating pool; the other part supernatant from dephosphorizing pool is input in the denitrifying pool to accelerate denitrifying action.

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 relates to a method for cultivating aerobic short-cut nitrification granular sludge for treating domestic sewage, which is characterized in that an SBR reactor adopts ratio of height to diameter of 1.8-10 and volume exchange rate of 50-67%; the sedimentation time is 30-50min, which is gradually shortened to 3min, or the sedimentation time is set as 5-8min. In the process of biochemical reaction, dissolved oxygen (DO) and pH value are regarded as real-time control parameters; aeration time is controlled according to the fuzzy control rule; nitrification is controlled to stop on the short-cut nitrification stage. The method can increase the content of ammonia oxidizing bacteria and volume load, shorten nitration reaction time, improve the sedimentation property of the sludge by a wide margin, shorten sedimentation time, narrow the floor area of the reactor and solve the problems of low operating efficiency and unstable nitrosification caused by time program control of the sewage treatment system. The aerobic short-cut nitrification granular sludge prepared by the invention is suitable for treating high-concentration ammonia nitrogen wastewater with low COD and is a biological wastewater treatment technology with broad market prospect.

The invention discloses a device and method for combination of short-cut denitrification phosphorus removal and anaerobic ammonia oxidation and belongs to the technical field of municipal sewage treatment. The device mainly comprises an anaerobic / anoxic reactor (A2SBR) and a short-cut nitrification reactor (N-SBR). The method comprises that raw water is fed into the A2SBR reactor, PAO decomposes polyphosphate and glycogen under the anaerobic conditions, provides energy for absorbing external carbon in sewage and transforming the external carbon into PHA stored in vivo, and releases phosphorus, the liquid is stood and discharged, the supernatant rich in ammonia nitrogen is fed into the N-SBR reactor, based on pH and DO real-time control strategy, short-cut nitrification is kept, after the short-cut nitrification, the nitrification liquid is returned into the A2SBR reactor and undergoes short-cut denitrification phosphorus removal and anaerobic ammonia oxidation reactions in an anoxic zone, and after the reactions, the product water satisfying the standard is discharged. The device and method have advantages of short-cut denitrification phosphorus removal and anaerobic ammonia oxidation, save energy and a carbon source and realize low C / N ratio domestic sewage deep denitrification.

The invention discloses an aerating and stirring device which can be applied to the field of cultivation and environmental protection and can improve the water quality and a water body activating method. An aerating device activates water body by adopting stirring and aerating modes, wherein a stirring device and the aerating device can operate respectively or simultaneously, an optimal working mode is selected according to actual requirements, and submersible-type vanes in the stirring device can guide pool water into water surface from the water bottom so as to form circulating water flow; and the aerating device improves the oxygen content in water and takes harmful gases away from the water by conveying tiny air bubbles into the water body, promotes the ecological self-purification of water and has the advantages of energy saving and low noise.

The invention discloses a method for realizing autotrophic nitrogen removal of city sewage through symbiosis of flocculent sludge and granular sludge. The city sewage firstly goes into a high-load activated sludge reactor, organic compounds in the sewage are adsorbed to activated sludge, then effluent goes into a flocculent sludge and granular sludge symbiosis autotrophic nitrogen removal reactor through a middle water tank, and synchronous shortcut nitrification anaerobic ammonia oxidation autotrophic nitrogen removal is realized; the autotrophic nitrogen removal reactor allows the mixed sludge to be screened into the granular sludge and the flocculent sludge through arranging a cyclone separator; the sludge age of the flocculent sludge is controlled through daily regular emissions of the flocculent sludge; the flocculent sludge is treated regularly by nitrite, so that increase of nitrite oxidizing bacteria in the flocculent sludge is controlled, and the system stable shortcut nitrification is maintained; through the above measures, the stable shortcut nitrification anaerobic ammonia oxidation autotrophic nitrogen removal of the city sewage is achieved, and the purposes of energy saving and consumption reduction are reached.

The invention discloses a method for realizing continuous-flow city sewage autotrophic nitrogen removal based on an FNA treatment of sludge. According to the invention, city sewage first enters an organic matter removing reactor, such that organic matters in the sewage are removed with a sludge absorption effect; discharged water enters an autotrophic nitrogen removing reactor, such that synchronous short-cut nitrification anaerobic ammonium oxidation autotrophic nitrogen removal is realized; sludge age is controlled by discharging residual sludge regularly everyday; active sludge is regularly treated by using free nitrous acid, such that nitrite oxidizing bacteria increase in the active sludge is controlled, and system stable short-cut nitrification is maintained; and continuous-flow city sewage autotrophic nitrogen removal is finally realized, and thus sludge treatment energy consumption is reduced.

The invention provides a treating method for high-salinity pharmaceutical wastewater. According to the treating method, the steps of materialization pretreatment, desulfuration biological treatment, materialization deep treatment, settlement and drainage and the like are adopted for treating the pharmaceutical wastewater which is high in COD concentration and high in sulfate radical concentration and contains medical intermediates and antibiotic residues. The treating method is fit for characteristics of the pharmaceutical wastewater, such as high concentration, refractory and strong biotoxicity. According to the invention, the technical combination is reasonable and the standard emission is ensured.

The invention relates to a method for producing tetracycline by fermentation of streptomyces aureus. The method comprises the following steps: slant spore culture, seed culture and fermentation culture of the streptomyces aureus, and is characterized in that dextrin, sucrose, corn pulp, hydrolyzed soybean meal and other medium-effect carbon-nitrogen sources are adopted to replace original late-effect carbon-nitrogen sources; by reducing the contents of starch and bean flour in an original fermentation culture medium and combining with a formula of a mixture in the fermentation process and adjustment of a replenishing method and placing part of the nitrogen sources in the fermentation culture medium into material replenishment in the fermentation process, the concentration of the culture medium in the fermentation process is effectively controlled, the oxygen dissolution condition in the early stage of fermentation is improved, the final residue of the culture medium of fermentation is controlled by material replenishment, the material consumption is reduced, and the emission of solid wastes is reduced; the metabolism velocity in exponential growth phase in the fermentation process of the tetracycline is effectively controlled, the abnormal situations that a fermentation solution turns red and becomes sour and the like in the fermentation process are reduced, and the fermentation level is improved.

The invention relates to a short-cut denitrification process adopting catalytic iron and biological coupling. The denitrification process comprises a catalytic iron biological denitrification section and a biological nitrosation section. In the catalytic iron biological denitrification section, wastewater enters the catalytic iron biological denitrification section, and the hydraulic retention time is controlled to be 20 minutes to 2 hours; the reflux ratio of mixed liquor is 100-300%; catalytic iron stuffing is arranged internally and the stacking density is 50-200 kg / M<3>. In the biological nitrosation section, when the number of structural-state ferrous iron Fe (II) formed by catalytic iron in the denitrification section is sufficient, the oxidation reduction potential (OPR) in the nitrosation section is controlled to be 40-100 mV; the hydraulic retention time in the nitrosation section is controlled to be 6-10 hours; when the number of structural-state ferrous iron Fe (II) formed by catalytic iron in the denitrification section is insufficient for producing a nitrite reduction reaction, the catalytic iron stuffing can be put at the front end of the nitrosation section at the same time, the generation of structural-state ferrous iron Fe (II) is accelerated by dissolved oxygen in the nitrosation section, a catalytic iron stuffing arrangement region is positioned at the front section of the biological nitrosation section, the hydraulic retention time is 1.0 hour, and the stacking density is 50-200 kg / M<3>. The short-cut denitrification process greatly reduces organic carbon sources required by denitrification and greatly shortens nitrification and denitrification processes.

The invention relates to the technical field of sewage treatment equipment, and particularly relates to a high-efficiency electrocoagulation device for sewage treatment. A cell body is an insulated cell body, and the cell body is internally provided with an electrode flocculation device; the electrode flocculation device is formed by stacking a plurality of electrode flocculation modules in the cell body; the electrode flocculation module A is formed by installing a plurality of parallel electrode plates in a reticular basket; the inner surfaces of both ends of the cell body are provided with a No.1 pole plate and a No.2 pole plate; a slag scraping device is arranged above the electrode flocculation device, and the slag scraping device is formed by driving a slag scraping shaft through a motor; the slag scraping shaft is provided with a flexible slag scraping plate; the cell body, which is positioned on one end of the electrode flocculation device, is internally provided with a conical floating slag containing area; the conical floating slag containing area is communicated with a slag discharge cell through a No.1 channel; and the bottom of the slag discharge cell is provided with a slag discharge port, so that waste water is electrolyzed for more than two times to be sufficiently treated, the stability is prevented from being influenced due to the change of a water inlet source, and the quality of effluent water is ensured. The high-efficiency electrocoagulation device disclosed by the invention has the advantages of easiness and convenience for operation, stability in operation, small occupied area, energy conservation and convenience for scientific management.

The invention discloses a sludge side treatment-based urban sewage short-cut nitrogen removal method. Urban sewage first enters into a bioreactor anoxic zone, organic compounds in sewage are used as denitrification carbon sources for reduction of nitrite nitrogen in a recycling nitrification liquor into nitrogen, then the sewage enters into an aerobic zone, ammonia oxidizing bacteria oxidizes ammonia nitrogen in to nitrite nitrogen; sludge age can be controlled by regular discharge of excess sludge, part of recycling sludge is treated by nitrite, and refluxed into a bioreactor, nitrite oxidizing bacteria in activated sludge can be controlled by treatment of part of the recycling sludge, systematic and stable shortcut nitrification can be maintained, continuous-flow urban sewage short-cut nitrogen removal by denitrification can be finally realized, and the sewage processing energy consumption can be reduced.

The method relates to a method for improving the denitrification rate of acrylonitrile waste water, and mainly solves the problems that the removal efficiency is relatively low and the effluent COD (Chemical Oxygen Demand) or TN (Total Nitrogen) cannot reach the standard during the acrylonitrile waste water treatment in the prior art. The method for improving the denitrification rate of the acrylonitrile waste water adopted by the invention comprises the following steps: (1) the acrylonitrile waste water enters a partial nitrification denitrification tank; (2) substances flowing out from the partial nitrification denitrification tank enters an oxygen-poor tank; (3) substances flowing out from the oxygen-poor tank enters a primary settling pond, substances flowing out from the upper part of the oxygen-poor tank enters an aerobiotic tank, and at least one part of bottom sludge of the oxygen-poor tank is discharged; (4) upper part substances flowing out from the aerobiotic tank enters a secondary settling pond, upper clean liquid of the aerobiotic tank enters an advanced oxidation tank, and the bottom sludge of the aerobiotic tank is discharged; (5) substances flowing out from the advanced oxidation tank enters a biological aerated filter to contact with the porous filter material and air, the waste water up-to-standard release technical scheme solve the problem in the prior art well, and the method can be applied to the industrial treatment of the acrylonitrile waste water.

The present invention relates to a process for treating organic waste water by utilizing enzyme method. Said process is implemented by making organic waste water successively by passed through the water storage tank or precipitation tank, pH regulating tank, pretreatment device, temperature control device, enzyme reactor and filtration device. It is characterized by that the waste water is fed into the immobilized enzyme reactor from its bottom portion, and undergone the process of one-stage or multistage treatment to implement enzyme catalytic degradation so as to make discharged water meet discharge standard.

The invention belongs to the field of sewage treatment, and provides a nitrogen removal method for a denitrification filtering pool based on short-cut denitrification and anaerobic ammonia oxidation.Urban sewage treatment achieves advanced nitrogen removal generally through a process which combines the traditional A2O technology and the denitrification filtering pool. The nitrogen removal methodfor the urban sewage denitrification filtering pool based on the short-cut denitrification and the anaerobic ammonia oxidation is characterized in that inoculation of anaerobic ammonia oxidation sludge and denitrification sludge is carried out during a starting stage of the denitrification filtering pool; during an operating stage, an ammonia nitrogen and nitrate nitrogen online monitoring deviceis mounted at a water inlet end of the denitrification filtering pool, and the aeration quantity of an A2O biochemical pool is adjusted so that a ratio of nitrate nitrogen to ammonia nitrogen in waterentering the denitrification filtering pool is 0.9 to 1.1; and a carbon source is added into the denitrification filtering pool according to a C / N ratio of 2.5 to 3.0, the short-cut denitrification occurs in the filtering pool to produce nitrite nitrogen, and anaerobic ammonia oxidation reaction further occurs, so that the advanced nitrogen removal of a system is finally achieved, and the dosageof the carbon source in the denitrification filtering pool and the aeration quantity of the traditional nitrification system are reduced.

The invention discloses equipment and a process for treating high-concentration ammonia-nitrogen wastewater. The equipment comprises a built-in regulating unit, a stripping tower, a shortcut nitrification unit, a denitrification unit and an equipment room. The process includes enabling the high-concentration ammonia-nitrogen wastewater to flow into the regulating unit; regulating PH (potential of hydrogen) of the high-concentration ammonia-nitrogen wastewater until the PH of the high-concentration ammonia-nitrogen wastewater reaches 10.0-11.0 and then lifting the high-concentration ammonia-nitrogen wastewater into the stripping tower; draining water from the stripping tower, and regulating PH of the water until the PH of the water reaches 6-9; enabling the water to flow into the shortcut nitrification unit; ultimately enabling the water to flow into the denitrification unit. The equipment and the process have the advantages that the equipment is simple, is convenient to operate, low in cost, good in economical efficiency and suitable for treating the high-concentration ammonia-nitrogen wastewater, stripping nitrogen removal is combined with shortcut nitrification and denitrification biological nitrogen removal, accordingly, the high-concentration ammonia-nitrogen wastewater treatment cost can be lowered, and environmental pollution due to direct discharge of high-concentration ammonia-nitrogen wastewater can be prevented.

The invention provides a three-phase biological fluidized bed A / O / O (Anaerobic / Oxic / Oxic) process for treating coking wastewater. According to the coking wastewater flow, the three-phase biological fluidized bed A / O / O process comprises a grease removal tank, a deamination tower, a catchment regulating tank, a primary coagulative precipitation tank, an anaerobic fluidized bed, a primary oxic three-phase biological fluidized bed, a secondary oxic three-phase biological fluidized bed, a biological filter and a secondary coagulative precipitation tank, wherein the primary oxic three-phase biological fluidized bed is internally filled with novel large-pore biological carrier particles and mainly used for removing COD (Chemical Oxygen Demand); the secondary oxic three-phase biological fluidized bed is filled with a large-specific surface area biological carrier and used for further degrading organic matters in water out of the primary oxic three-phase biological fluidized bed; granular biological fillers different in granularity are filled in the biological filter from top to bottom so that residual organic matters in the wastewater can be quickly adsorbed and degraded; the coagulative precipitation tanks are used for further separating out fine suspended solids and dropping biological sludge in water out of the biological filter. The process is capable of saving the carbon source, reducing the oxygen demand, reducing the alkali consumption and also reducing the amount of sludge generated.

The invention discloses a macromolecular polymerization inhibitor containing phenolic groups and nitroxide groups, and a preparation method thereof. The polymethyl acrylate with polymerization degree of p, the phenolic compound and the nitroxide free radical type compound are dissolved in the solvent according to the mol ratio of 1:x:y, the catalyst with mass being 0.5-3.0wt percent of the total mass of the reaction mixture is added in to react at the temperature of 20-80 DEG C and under the 0.05-0.09MPa until the concentration of the phenolic compound and the nitroxide free radical type compound is not changed, the reaction mixture subsides in water, and the polyacrylate main chain is obtained after the sediment is dried and is connected with the macromolecular polymerization inhibitor containing the phenolic groups and the nitroxide free radical groups through ester linkage; and the method has the advantages that the raw material is easily obtained, the operation is simple and the method is convenient for the industrial production. The prepared product can effectively prevent the acrylate from being polymerized in the production process, reduce the content of the low polymer in the product, reduce the consumption of the total polymerization inhibitor and improve the product quality and has the broad industrial application prospect.

The invention discloses a livestock and poultry manure wastewater processing method. The method is characterized in that: a methane production process and a denitrification treatment are simultaneously carried out by using a CSTR reactor; and a nitration and denitrification treatment is carried out by using an MSBR reaction tank. According to the invention, the methane production process and the denitrification treatment are integrated into a whole. With the short-range nitration and denitrification treatment of the MSBR, wastewater COD, nitrite and ammonia nitrogen can be removed simultaneously. Further, with the method, 40% of carbon source, 25% of oxygen demand and 300% of sludge production can be saved.

The invention discloses an automatic oxygen therapy adjusting apparatus for nursing critical patients. The automatic oxygen therapy adjusting apparatus for nursing the critical patients comprises a sleeve, an elastic film, a pressure adjusting mechanism, an oxygen adjusting mechanism, an oxygen outlet and an oxygen inlet; the sleeve is connected with a piston in a sliding manner, a manual adjusting mechanism is arranged above the piston, the oxygen adjusting mechanism is arranged below the elastic film, the oxygen adjusting mechanism comprises a vertical rod, a straight rod, a connecting mechanism, a valve and a support, the sleeve on the position of the valve is provided with a through circular oxygen inlet, the oxygen outlet is arranged on a position, symmetric to the axis, of the oxygeninlet, when in use, the oxygen inlet is connected with an oxygen tank, and the oxygen outlet is connected with an oxygen mask. The automatic oxygen therapy adjusting apparatus is reasonable in structure design, when the oxygen demand of the patient is increased, the oxygen amount sucked from the oxygen outlet is increased, resulting in the reduction of air pressure in an air chamber, under the effect of external atmospheric pressure, the piston slides downwardly to drive the right end of the straight rod to be lowered and the left end to rise, the opening degree of the valve is increased, andthe oxygen supply amount is increased; and conversely, the oxygen amount respired by the patient from the oxygen outlet is reduced, and the oxygen supply amount is reduced.

The invention discloses a denitrification treatment method for livestock and poultry breeding wastewater. Sewage is pretreated and then is sequentially treated by a primary sedimentation tank, a biological tank and a secondary sedimentation tank; the biological tank comprises an aerobic phase and an anoxic phase; effluent of the primary sedimentation tank simultaneously flows into the aerobic phase and the anoxic phase by a distribution well; effluent of the aerobic phase enters the anoxic phase for treating; one part of effluent of the anoxic phase refluxes to the aerobic phase; the residual effluent enters the secondary sedimentation tank for settling and separating; the effluent is discharged through a discharging outlet; diatomite and grape seeds tannin are fed in the aerobic phase in a weight ratio of (1 to 3) to (0.5 to 1.8). According to the process, ammonia nitrogen in the sewage can be effectively removed rapidly.

The invention discloses a nitrosation-anaerobic ammonia oxidation treatment process for aquaculture waste water. The nitrosation-anaerobic ammonia oxidation treatment process comprises a nitrosation stage and an anaerobic ammonia oxidation stage, wherein the nitrosation stage and the anaerobic ammonia oxidation stage adopt immobilized microbial spheres for treatment, and the immobilized microbialspheres are obtained by sludge culture, domestication and immobilization. The nitrosation-anaerobic ammonia oxidation treatment process disclosed by the invention has the beneficial effects that the immobilized microbial spheres are cultured and domesticated by adopting bottom sediment of a culture pond, and microbial immobilization is carried out by proper concentration of sodium alginate, boricacid, polyvinyl alcohol and artificial zeolite, higher strength can be borne, the dispersion is not easy, the mass transferring property is good and the stability is higher; nitrosobacteria and anaerobic ammonium oxidation bacteria are cultured, domesticated and immobilized simultaneously to obtain the immobilized microbial spheres with nitrosation and anaerobic ammonia oxidation capabilities, sothat the treating capability is strong and the treatment cost is reduced; the nitrosation-anaerobic ammonia oxidation treatment process has the advantages of small occupied area, low oxygen demand, lower energy consumption and low cost.

The invention discloses a process for producing clean synthesis gas from crushed coal. The process comprises the steps of producing crude coal gas by virtue of a crushed coal pressurizing gasifying furnace, after carrying out heat exchange, supplying the crude coal gas together with preheated oxygen into a high-temperature pyrolysis reforming reactor to enable original water vapor and carbon dioxide in the added oxygen and crude coal gas to serve as oxygen-containing reaction media to react with organic matters such as various oil, low carbon hydrocarbon and CH4 in the crude coal gas, reforming the mixed gas into CO and H2, and converting most of ammonia gas in the crude coal gas into nitrogen by virtue of a high temperature action, wherein the temperature in the reactor can reach 900-1400 DEG C, and the outlet temperature of crude synthesis gas is 900-1200 DEG C. The crude synthesis gas does not contain tar, low carbon hydrocarbon and phenolic compounds, the content of NH3-N and the CODCr of condensed water are substantially decreased, and the yields of CO and H2 of low-rank coal are substantially increased.

The invention belongs to the field of water environment protection, and particularly provides a system and method of low-carbon-source town sewage biological denitrification by adopting a push-flow-type anoxic tank, and belongs to the field of integration of activated sludge and biological membrane processes. The method is an important improvement based on an anoxic-aerobic biological denitrification process. An anoxic tank is transformed into the push-flow-type reaction tank and is divided into three to four sections; an elastic filler is added into an anoxic reactor to maintain a high sludge concentration, and a relatively long hydraulic retention time is adopted in the anoxic tank. In the anoxic tank, a push-flow reaction mode that three to four complete mixing reactors are connected in series is actually carried out. The method is suitable for improving a conventional biological denitrification process (the denitrification principle is based on combination of anoxic denitrification-aerobic nitrification), and the requirement on the carbon-nitrogen ratio of sewage can be reduced to 3.0-3.2 while the denitrification rate of the conventional process can be maintained and the denitrification rate is slightly improved. Compared with the conventional biological denitrification process, the method has the advantages that only the anoxic tank needs to be transformed, and the method is suitable for upgrading and modifying the existing process. According to the method disclosed by the invention, aeration energy consumption is reduced, and a supplementary carbon source is saved or even cancelled, so that operation cost is relatively low, and good economical efficiency is achieved.

Belonging to the field of biological sewage treatment, the invention relates to a method for realizing shortcut nitrification and denitrification nitrogen removal by oxidation ditch segmental water-feeding process. The method includes that: urban sewage is divided into four equal parts to enter an anoxic zone of an oxidation ditch reactor, denitrifying bacteria utilize organic matters in the sewage as the carbon source to reduce nitrite nitrogen produced by a previous aerobic section into nitrogen, then the sewage enters an aerobic zone, and ammonia oxidizing bacteria oxidize ammonia nitrogen into nitrite nitrogen; then the sewage enters an anoxic zone and an aerobic zone in order; part of precipitated sludge in a secondary sedimentation tank enters a sludge treatment zone, free ammonia is employed to treat the sludge, and then the sludge flows back to the oxidation ditch anoxic zone; selective inhibition is carried out on nitrite oxidizing bacteria in the sludge by free ammonia so as to control the increase of nitrite oxidizing bacteria in the sludge and maintain shortcut nitrification in the oxidation ditch process; and finally shortcut nitrification and denitrification nitrogen removal of urban sewage can be realized, the nitrogen removal effect is improved, and the treatment energy consumption is reduced.

The invention discloses a printing and dyeing sewage classification treatment process. Printing and dyeing sewage is divided into two broad categories of chemical fiber sewage and cotton comprehensivesewage, the chemical fiber sewage is divided into two sub-categories of alkali-reduced sewage and chemical fiber general sewage, and then treatment is carried out; an alkali-reduced filtrate is incorporated into a chemical fiber general filtrate, subsequent physicochemical process is carried out after adjustment, a medicament can be effectively saved, and thus the operation cost is reduced; the cotton comprehensive sewage is subjected to alkaline process treatment, and is use as an alkali source for reversed adjustment of a mixed sewage III, and thus an alkali use amount of chemical fiber sewage can be saved; cotton desizing sewage, cotton printing sewage and cotton dyeing sewage are combined into one category of sewage, namely the cotton comprehensive sewage, the concentration of pollutants can be averaged each other through mixing of three kinds of sewage, and treatment difficulty is reduced; at the same time, a construction area is reduced; and a pH value of the cotton comprehensive sewage can be controlled centrally to create prerequisites for the next step of mixing with the mixed sewage III.

The invention discloses a device and a method for processing high ammonia-nitrogen wastewater and domestic sewage by combining continuous flow partial nitrification / anaerobic ammonia oxidation with DEAMOX (DEnitrifying AMmonium OXidation), and belongs to the field of sewage and sludge biotreatment. The device comprises a high ammonia-nitrogen wastewater storage tank, an up-flow sludge bed USB (Universal Serial Bus) reactor, a middle water tank, a domestic wastewater storage tank, an SBR (Sequencing Batch Reactor) and a water discharging tank. The method comprises the following steps: high ammonia-nitrogen wastewater enters the up-flow sludge bed USB reactor; ammonia nitrogen is converted into nitrogen and nitrate nitrogen by ammonia oxidizing bacteria and anammox bacteria; effluent and domestic sewage simultaneously enter the SBR; nitrate nitrogen in the effluent and ammonia nitrogen in the domestic wastewater are converted into nitrogen and nitrate nitrogen by denitrifying bacteria and anammox bacteria. According to the device and the method, the problem of excessive effluent nitrate nitrogen when a partial nitrification / anaerobic ammonia oxidation technology is used is effectively solved, and meanwhile, the efficient denitrification of the domestic sewage is realized.

The invention discloses an integrated short-cut nitrification-anaerobic ammonium oxidation sewage treatment acclimation method and equipment. The integrated short-cut nitrification-anaerobic ammonia oxidation sewage treatment acclimation method utilizes the reaction equipment and adopts an intermittent step aeration operation mode for sewage treatment acclimation; the reaction equipment comprisesa reactor and an aeration device, and the aeration device is used for oxygenating the reactor in the aerobic stage of the reaction; and the method specifically comprises the following steps: the aeration device is controlled for intermittent step aeration in the sewage treatment domestication process to realize the reaction mode of multi-stage aerobic / anoxic alternated operation of sewage treatment in the reactor, and duration of a next-stage aerobic stage is greater than duration of a previous-stage aerobic stage. Through the above manner, the sewage treatment acclimation method and equipmentprovided by the invention can realize and stably operate the integrated short-cut nitrification and anaerobic ammonium oxidation process, and achieve the purpose of autotrophic nitrogen removal, in the acclimation process, external addition of organic carbon is not needed, the aeration amount is low, and the total nitrogen removal amount of the system is high.

The invention discloses an MBBR (Moving Bed Biofilm Reactor) sewage treatment system and a treatment process and belongs to the technical field of sewage treatment. The problems in the prior art thata treatment process of the traditional sewage treatment plant is long in procedure, low in integration level, low in load, high in carbon source requirement and common in effect of removing nitrogen,phosphorus and SS are solved. The sewage treatment system comprises an anaerobic zone, an anoxic zone I, an anoxic zone II, a flocculation zone, a settling zone, a biofilm zone, an effluent zone and pipelines for connecting the zones. According to operations of adjusting reflux, controlling the sludge concentration, setting parameters of the suspended carrier filling rate in the biofilm zone and DO, setting the membrane flux of a membrane assembly in the effluent zone and aeration density and the like, by utilizing the characteristic of denitrifying phosphate-accumulating organisms, the settling zone is arranged on a middle section of biochemical treatment, the biofilm process is coupled to the denitrification filter process, and the sewage treatment system disclosed by the invention has the advantages of being high in integration level, capable of synchronously removing nitrogen and phosphorus and saving the carbon source, low in concentration of the nitrogen, phosphorus and SS in theeffluent, high in load and long in equipment service life.