149 results about "Sequencing batch reactor" patented technology

The invention discloses biochar coupled bacteria-algae granular sludge as well as a culture method and application thereof. According to the invention, in an optical sequencing batch reactor, activated sludge in a secondary sedimentation tank of a sewage treatment plant, chlorella and biochar are utilized for culturing to obtain biochar coupled bacteria-algae granular sludge, and pollutants such as COD, NH4 < + >-N, PO4 < 3->-P and antibiotics (such as enrofloxacin) contained in aquaculture wastewater can be efficiently removed by utilizing the biochar coupled bacteria-algae granular sludge under the condition that the salinity is 0.3%. Besides, the biochar coupled bacteria-algae granular sludge is good in stability, when the biochar coupled bacteria-algae granular sludge is used for treating antibiotic pollutants, the situation that the removal rate of the antibiotic pollutants is reduced along with the prolonging of time is avoided, pollutants such as COD, NH4 < + >-N, PO4 < 3-P > and antibiotics can be efficiently and stably removed, and the biochar coupled bacteria-algae granular sludge has good application prospects. The method has a good application prospect in aquaculture wastewater treatment.

The invention discloses a self-driven bio-electro-Fenton sewage treatment method based on granular sludge electroactivity domestication. The sewage treatment method comprises the following steps: firstly, inoculating anaerobic granular sludge into an anode chamber of a microbial fuel cell, fixing a clustered carbon fiber electrode in a biological anode chamber as an electrode collector, taking a cathode as an oxygen reduction cathode, and performing electrochemical enrichment to obtain electroactive granular sludge; then, preparing an iron-cobalt diatomic catalyst from the nitrogen-doped graphene oxide, cobalt phthalocyanine and iron phthalocyanine; and finally, adding the iron-cobalt diatomic catalyst into the electroactive granular sludge to form a hybrid structure, controlling dissolved oxygen in a reaction system, and degrading organic pollutants by adopting an SBR (sequencing batch reactor). The biological electro-Fenton technology has a better effect of removing refractory organic pollutants, and compared with a traditional electro-Fenton method, the self-Fenton technology can achieve the activity of molecular oxygen without external electric energy input.

The invention discloses a device and a method for synchronously removing hydrogen sulfide waste gas and nitrate wastewater by using a sulfur autotrophic denitrification technology, and belongs to the technical field of biological deodorization and sewage treatment. The device mainly comprises a water tank, a sequencing batch reactor (SBR), a washing tower, a water pump, a fan and the like which are connected in sequence. The method comprises the following steps: the discharged hydrogen sulfide waste gas enters a washing tower and is contacted and absorbed with circularly flowing absorption liquid to form mixed liquid mainly comprising S < 2-> and S < 0 >; the mixed solution and nitrate wastewater (or secondary effluent of a municipal sewage treatment plant taking nitrate nitrogen as a main pollutant) enter an SBR (sequencing batch reactor) together, and autotrophic nitrogen removal is carried out through a sulfur autotrophic denitrification way by taking reduced sulfur (S2-and S0 as main components) in the mixed solution as electron donors. According to the method, the hydrogen sulfide waste gas and the nitrate waste water are economically, efficiently and synchronously removed finally, and a brand new thought is provided for combination of biological deodorization and deep denitrification of urban sewage.

The utility model provides a cyclone device applied to screening of aerobic granular sludge of an SBR (sequencing batch reactor), which comprises the SBR, a cyclone device, a cyclone device and a cyclone device, and is characterized in that an aerobic granular sludge mixed solution is filled in the SBR; the hydraulic cyclone system comprises a hydraulic cyclone and a mud bucket, the hydraulic cyclone is provided with a feed port, an overflow port and an underflow port, the underflow port of the hydraulic cyclone is connected with an inlet of the mud bucket, and an outlet of the mud bucket is connected with an inlet of the SBR reactor or connected with the outside of the mud bucket; the reflux system comprises a reflux pipe, a reflux pump and a control valve assembly, the outlet of the SBR is communicated with the feed port of the hydrocyclone through the reflux pipe, the reflux pump and the control valve assembly are arranged on the reflux pipe, and the control valve assembly controls the on-off and the flow velocity of the reflux pipe. According to the invention, the hydraulic shearing condition is adjusted by arranging the hydrocyclone, so that the purposes of shortening the granulation time of the aerobic granular sludge, shortening the starting time of the SBR reactor, enhancing the settleability of the aerobic granular sludge and improving the operation stability of the whole system are achieved.

The invention discloses a method for realizing municipal sewage denitrification by combining pre-oxidation with a nano zero-valent iron loaded activated carbon carrier, and aims to solve the problems of slow growth speed of iron ammonia oxidation microorganisms, poor denitrification effect and the like in an iron ammonia oxidation process. The water treatment method comprises the following steps: 1, adding ferrate into municipal sewage to carry out pre-oxidation treatment, and adding polymeric ferric sulfide to carry out enhanced coagulation treatment; 2, inoculating mixed sludge into the SBR bioreactor, wherein the mixed sludge is composed of anaerobic ammonia oxidation granular sludge and municipal sludge; 3, introducing inert gas into the SBR reactor; and 4, introducing the pre-oxidized and coagulated sewage supernatant as inlet water into an SBR (Sequencing Batch Reactor) inoculated with sludge, and regularly adding carbon-loaded nano zero-valent iron into the SBR to complete denitrification of the municipal sewage. According to the invention, ferrate is added into municipal sewage for pre-oxidation through the front end, so that partial removal of organic matters and phosphorus is realized, and nitrogen removal of sewage is realized in combination with an activated carbon carrier loaded with nano zero-valent iron at the rear end.

The invention discloses an autotrophic nitrogen removal and detoxification device and method for treating coking wastewater through two-stage low-oxygen short-cut nitrification, sulfur autotrophic denitrification and anaerobic ammonia oxidation, and belongs to the field of sewage treatment. The device comprises a water inlet tank, a sequencing batch reactor, a middle water tank and an up-flow anaerobic sludge blanket reactor. The method comprises the following steps: enabling the coking wastewater which is subjected to carbon capture and contains ammonia nitrogen and thiocyanate to enter a sequencing batch reactor, oxidizing the ammonia nitrogen into nitrite under a limited oxygen condition, and generating nitrogen, sulfate and ammonia nitrogen from the thiocyanate and the nitrite by autotrophic denitrifying bacteria; reaction effluent mixed with coking wastewater enters an upflow anaerobic sludge blanket, and anaerobic ammonium oxidation bacteria convert ammonia nitrogen and nitrite into nitrogen and generate a small amount of nitrate; and the residual nitrate, nitrite and thiocyanate are continuously and thoroughly removed through the sulfur autotrophic denitrification effect. The method provides a new idea for economical and efficient autotrophic nitrogen removal and detoxification of the coking wastewater containing thiocyanate and ammonia nitrogen.

The invention discloses a winch type water decanting device, which relates to the technical field of water decanters and comprises a bottom plate, a driving motor, a winch wheel, an SBR (sequencing batch reactor) pool body, a support frame, a water decanting tank and related components. The driving motor drives the winding wheel to rotate through the belt pulley, further drives the steel wire rope to move up and down, controls the decanting tank to slide on the guide stand column, and ensures accurate adjustment of the water level. The decanting tank comprises a filter screen, a floating plate and a floating cylinder, impurities in water are effectively filtered, and water flow is kept stable. The water outlet and the connecting hose guarantee smooth drainage of water flow, and water flow retention or overflow is avoided. The two symmetrical supporting frames and the working bridge of the device provide structural stability, the steel wire rope is guided to move through the protection guide frame, abrasion is reduced, and the service life of the device is prolonged. The electric driving system is linked with the steel wire rope, automatic lifting of the water decanting tank is achieved, manual operation is reduced, and the working efficiency is improved.

The invention provides a 100% drainage ratio pure biological membrane segmented aeration AOA-SBR anaerobic ammonia oxidation high-efficiency deep nitrogen removal method and a 100% drainage ratio pure biological membrane segmented aeration AOA-SBR anaerobic ammonia oxidation high-efficiency deep nitrogen removal device. The reactor operates in an AOA (anaerobic-aerobic-anoxic) mode, after urban domestic sewage is pumped into the SBR, an internal carbon source is stored in an anaerobic section and phosphorus is released, a nitration reaction is carried out in an aerobic section, and an endogenous denitrification / denitrification phosphorus removal and anaerobic ammonia oxidation process is carried out in an anoxic zone along with a partial short-cut nitrification anaerobic ammonia oxidation process and a synchronous short-cut nitrification and denitrification process. The anaerobic ammonia oxidation reaction is conditionally carried out on the whole process scale through segmented aeration regulation (three times of aerobic and anoxic alternation). Meanwhile, the drainage ratio is set to be 100% by means of a pure filler structure, the nitrogen and phosphorus removal load is improved, and the influence of the last period is eliminated. According to the invention, anaerobic ammonia oxidation efficient deep denitrification can be realized without strict inhibition of nitrite oxidizing bacteria, the aeration demand of sewage treatment is reduced, and the energy consumption is reduced.

The invention discloses a method for strengthening formation and denitrification performance of salt-tolerant aerobic granular sludge in high-salinity wastewater treatment, which comprises the following specific implementation processes: culturing S-AGS by taking activated sludge of a town sewage treatment system and salt-tolerant sludge of an industrial wastewater treatment system as a mixed inoculum, and optimizing the operating conditions of an SBR (sequencing batch reactor); 16SrRNA high-throughput sequencing and co-occurrence network analysis are applied to identify S-AGS core species, a theoretical basis is provided for directional strengthening of structural stability and denitrification performance of the S-AGS core species, screening and expanding culture are performed on core functional strains, Thaura T-1 and PseudofuvimonasP-1 obtained through screening and expanding culture are compounded to prepare a composite functional microbial inoculum, and on the basis of mixed inoculum and reactor conditions, the composite functional microbial inoculum can be used for preparing the high-efficiency denitrification agent for the S-AGS. The composite functional microbial agent is added, so that the synergistic strengthening effect on the denitrification performance of the S-AGS is achieved. According to the method, mixed sludge is inoculated, efficient nitrogen and carbon removal performance is achieved under high salt stress, a core strain is screened and subjected to expanding culture and compounded to serve as a composite functional bacterial agent, and the nitrogen removal efficiency of nitrification / denitrification in the biological treatment process under salt stress can be improved.

The invention discloses a method for synchronously removing heavy metals and pollutants in aquaculture wastewater by utilizing copper stress to drive granulation of bacteria-algae granular sludge. The method specifically comprises the following steps: culturing and domesticating bacteria-algae granular sludge by adopting a sequencing batch reactor, and efficiently removing the high-concentration heavy metal Cu in the aquaculture tail water through long-term operation of the reactor under the illumination condition of simulated sunlight and low aeration intensity, and the average removal rate reaches 75% or above; meanwhile, organic matters and nutrient substances in the wastewater are effectively removed, and granulation of the bacteria-algae granular sludge is promoted. According to the method, the bacteria-algae granular sludge is used for treating the copper-containing low-carbon aquaculture wastewater for the first time, in the operation stage, the reactor performance is stable, the dirt removal capacity is not obviously influenced, under the exposure of Cu, the granulation process is accelerated, the sludge settling performance is far superior to that of a control group, and the method is a method for effectively removing heavy metal and pollutants in the aquaculture wastewater and has good application prospects. Good application prospects are realized.

The invention discloses a device and a method for cooperatively treating domestic sewage and nitrate wastewater by coupling heterotrophic denitrification and sulfur autotrophic denitrification with anaerobic ammonia oxidation, and belongs to the field of biological denitrification of sewage. The device comprises a water inlet tank, a sequencing batch reactor (SBR), a peristaltic pump, a drain valve, a water outlet tank and the like. The method comprises the following steps: (1) adding sulfur particles into a first SBR (Sequencing Batch Reactor), introducing nitrate wastewater and domestic sewage into the SBR, converting nitrate nitrogen into nitrogen through sulfur autotrophic denitrification under an anaerobic condition, and reducing the nitrate nitrogen into nitrite nitrogen when COD (Chemical Oxygen Demand) comes from the domestic sewage; and (2) adjusting the proportion of ammonia nitrogen and nitrite in the effluent of the first SBR, and stably removing ammonia nitrogen and nitrite through anaerobic ammonia oxidation. In the two-stage system, 100% of aeration and external carbon sources are saved, and a new thought is provided for synergistic denitrification of pure autotrophic systems of industrial wastewater and domestic sewage.

The invention discloses a single-stage aerobic SBR (Sequencing Batch Reactor), which relates to the technical field of water treatment and comprises a reaction vessel, a water inlet assembly positioned on one side of the reaction vessel, a sewage discharge assembly positioned on the other side of the reaction vessel, a suspension plate positioned in the middle of the reaction vessel and a suspension tank assembly positioned at the upper part of the interior of the reaction vessel, the reaction vessel is of a hollow structure composed of a bottom cone and a top cylinder, the single-stage aerobic SBR reactor utilizes domesticated and cultured sludge to react with water, meanwhile, the reaction of the sludge and the water is accelerated through the stirring shaft, and then the treated water is subjected to layered recovery through the suspension tank assembly; according to the single-stage aerobic SBR phosphorus removal technology, phosphorus can be efficiently removed under the condition that the concentration of nutrient substances in inflow water is deficient, meanwhile, the single-stage aerobic SBR phosphorus removal technology does not need to be provided with an anaerobic section, the phosphorus removal effect is good, operation is easy and convenient, and the influence of nitrate on the phosphorus removal technology is small, and the existing water quality and facility conditions of a power plant can meet the phosphorus removal requirement of the technology.

The utility model provides a sludge discharge device of a sequencing batch reactor, and belongs to the field of manufacturing of sludge treatment equipment. The device comprises a treatment tank, a spiral conveyor and a draining tank, the spiral conveyer comprises a conveying pipe and a motor; a conveying screw is mounted in the conveying pipe, and the conveying pipe is provided with an inlet and an outlet; the inlet corresponds to the bottom of the treatment tank, and a sludge pipe is arranged on the outlet; the outlet is connected with the draining tank through the sludge pipe; and the draining tank is fixed on one side above the treatment tank. According to the utility model, the sludge in the treatment tank is regularly conveyed into the draining tank through the screw conveyer for dehydration and natural drying, so that the occupied area is saved, the equipment investment is low, and the problem that the sludge of the sequencing batch reactor is difficult to regularly and automatically treat is well solved.

The invention provides a method for inhibiting sludge bulking through hypoxia-anoxic intermittent aeration. The method comprises the following steps: inoculating activated sludge into a sequencing batch reactor, introducing sewage to be treated, mixing, and carrying out intermittent aeration treatment; wherein the intermittent aeration treatment comprises at least one cycle formed by alternation of a low-oxygen treatment time period and an anoxic treatment time period; and in the low-oxygen treatment period, the dissolved oxygen concentration in the reactor is controlled to be higher than that in the anoxic treatment period through aeration. According to the method, through low-oxygen-oxygen-deficiency alternate environment regulation and control, efficient nitrification and denitrification are achieved, meanwhile, filamentous bacterium growth is selectively inhibited, flora structure optimization is promoted, the sludge settling performance is rapidly recovered, the system denitrification efficiency is improved, and the method has the advantages of being simple in process, environmentally friendly and low in operation cost.

The invention discloses a sequencing batch sewage treatment device and method. The sequencing batch sewage treatment device comprises a reaction tank body; aeration units of the microporous aeration assembly are distributed in the bottom area of the reaction tank body in an array manner; the rotating axis of the stirring assembly coincides with the geometric center of the reaction tank body; and the time sequence cooperative controller is connected with the microporous aeration assembly through a first signal link, is connected with the stirring assembly through a second signal link, and is configured to control the microporous aeration assembly and the stirring assembly to be alternately started and stopped in a single treatment period, and maintain the duration ratio of the aeration stage to the stirring stage to be within an adjustable range. According to the scheme, the timing sequence cooperative controller is connected with the aeration and stirring assembly, the aeration and stirring assembly are controlled to be alternately started and stopped in a single treatment period, the aeration / stirring duration proportion is dynamically adjusted, and the precise micro-aerobic environment is constructed.

The invention discloses a carrier type anaerobic sequencing batch reactor suitable for anaerobic digestion treatment of sludge and a treatment method. The anaerobic sequencing batch reactor comprises a tank body, a stirrer, a biogas water-sealed tank, a temperature adjusting module, a bottom sludge inlet valve, a scum valve, an overflow sludge discharge valve, a bottom sludge discharge valve, a circulating sludge path and carrier adding equipment, the carrier recovery device comprises a magnetic adsorption recovery device, the output end of the overflow sludge discharge valve and the output end of the bottom mud discharge valve are connected with the input end of the magnetic adsorption recovery device, the reactor can enrich microorganisms by adding the magnetic carrier, the settleability of the sludge can be improved by formed anaerobic granular sludge, and the magnetic carrier can be recycled. The device is simple in structure, realizes shorter sludge hydraulic retention time and longer sludge retention time, and is matched with carrier recovery equipment to recover carriers in discharged sludge and enable the carriers to flow back to the reactor, so that loss of the carriers is avoided.

The application discloses a method for simultaneously strengthening phosphorus removal and nitrogen removal by using an anaerobic-aerobic granular sludge reactor, and specifically comprises the following steps: adopting an anaerobic-aerobic operation mode to form aerobic granular sludge with biological phosphorus removal capacity in a sequencing batch reactor; sequentially performing an anaerobic water feeding stage, an aerobic stage, a sedimentation stage and a water discharge stage in each operation cycle; wherein the multi-point layered water feeding mode is adopted in the anaerobic water feeding stage; the wastewater to be treated is fed from the bottom and the middle of the granular sludge layer, wherein the water feeding amount at the bottom of the granular sludge layer accounts for 70-90% of the total water feeding amount; the intermittent aeration mode is adopted in the aerobic stage, each intermittent aeration cycle comprises an aeration period and a non-aeration period, and the time ratio of the single aeration period to the single non-aeration period is 2-3:1. By operation regulation, a microenvironment conducive to denitrification and phosphorus precipitation is constructed inside the aerobic granular sludge, carbon source competition can be effectively alleviated, phosphorus removal pathways are expanded, and the synergistic strengthening of the nitrogen removal and phosphorus removal processes is promoted.

A method and apparatus for treating wastewater using a sequencing batch reactor wherein the biological solids are densified through hydraulic and organic selection pressures. Wastewater is introduced to the reactor near the end of the treatment cycle under anaerobic conditions following the effluent withdrawal step and prior to the start of next treatment cycle. A floating sludge withdrawal apparatus is used in conjunction with a floating surface mixer to selectively remove lighter flocculant solids and retain denser solids by temporarily reducing the mixing energy during the wasting process.

The invention discloses a deep denitrification system and method for driving Coammox and Anammox synergism by utilizing micro-current Fe-Cu bipolar biological electrode particles, and belongs to the technical field of biological sewage treatment and microorganism enrichment. The system comprises an SBR (Sequencing Batch Reactor) added with Fe-Cu bipolar biological electrode particles, an aeration and control system and a DO / ORP (Dissolved Oxygen / Oxidation Reduction Potential) online monitoring device. Under the condition of ultralow dissolved oxygen, through microampere-level current and by utilizing the ecological niche advantages of in-situ slow release of Fe and Cu trace elements and active reinforcement of Comammox and Anammox of a bipolar electrode and electron directional flow in a nitrogen metabolism process, metabolic synergy and spatial copolymerization of Comammox and Anammox are driven, so that high enrichment and efficient deep denitrification of Comammox and Anammox are realized under the mainstream ammonia nitrogen concentration (40mg-N / L). The system does not need an organic carbon source, is simple in process and stable in operation, can remarkably reduce aeration energy consumption and material consumption, is suitable for low-carbon deep denitrification and upgrading and reconstruction of municipal sewage treatment, and provides a new insight for global biological nitrogen circulation.

The invention discloses a starting and control method for treating ammonia-nitrogen wastewater by an integrated complete ammoxidation coupling short-cut denitrification anaerobic ammoxidation process, and belongs to the field of wastewater biological treatment. The starting method adopts a step-by-step inoculation strategy, and comprises the following steps: firstly, inoculating complete ammoxidation sludge in the SBR reactor for low-oxygen domestication, and after successful starting, supplementing and inoculating short-cut denitrification coupled anaerobic ammoxidation sludge. The control method adopts a sectional water inlet mode, and comprises the following steps: a first part of ammonia nitrogen wastewater firstly enters an integrated SBR (Sequencing Batch Reactor), and ammonia nitrogen is directly oxidized into nitrate nitrogen through complete ammonia oxidizing bacteria (Comammox) under the condition of low dissolved oxygen; aeration is stopped, a carbon source is added for short-cut denitrification, and nitrate nitrogen is reduced into nitrite nitrogen; and then pumping a second part of ammonia nitrogen wastewater, and converting ammonia nitrogen in the wastewater and accumulated nitrite nitrogen into nitrogen by using anaerobic ammonium oxidation bacteria, so as to remove the ammonia nitrogen in the wastewater. According to the invention, deep denitrification is realized under the condition of saving energy consumption and a carbon source.

The invention provides a microbial desalination system and device for saline-alkali soil improvement, and relates to the technical field of microbial washing and dewatering treatment.The microbial desalination system comprises a washing and dewatering treatment system which comprises a mechanical grid and a flocculation reaction tank and is used for removing suspended solids (silt and organic particles), reducing turbidity and improving subsequent microbial activity; and the microbial water purification system comprises a sequencing batch reactor and a microbial agent adding device, is equipped with an aeration system, and adsorbs or converts salt by using salt-tolerant microorganisms. According to the scheme, when the washing water is desalted through microorganisms, a PH regulator and glycerin are added into the washing water in the reaction tank firstly, the washing water with the high PH value is prevented from damaging a lipid bilayer structure of a microbial cell membrane by adjusting the PH value of the washing water, and therefore the extracellular environment is stabilized; and the compound can be actively absorbed into cells by microorganisms, the osmotic pressure in a high-salt environment is balanced, and cell dehydration is prevented.

The invention discloses a process for producing titanium-zirconium-hafnium series metal through continuous reduction, which comprises the following steps: in an inert atmosphere, heating a reactor to a reaction temperature, adding metal magnesium, and then continuously adding tetrachloride at a constant high speed to carry out reduction reaction. In the reaction process, magnesium chloride melt is continuously or intermittently discharged, and metal magnesium is supplemented to maintain the reaction; meanwhile, the generated sponge titanium is continuously moved out and conveyed to a collector through a conveying device directly communicated with the reactor. The whole process of feeding, reacting, discharging and product moving-out is continuous, a traditional sequencing batch production mode is subverted, the titanium tetrachloride feeding speed can be stably kept at a high level (for example, the titanium tetrachloride feeding speed is larger than or equal to 1600 kg / h), the production efficiency is remarkably improved compared with a traditional process, meanwhile, stability and excellent product quality are guaranteed, the automation degree is high, and the production cost is low. And centralized recycling of reaction waste heat can be realized.

The utility model discloses a cross-linking agent TAIC (triallyl isocyanurate) production wastewater treatment device, which relates to the technical field of industrial wastewater treatment and comprises a high-temperature alkaline hydrolysis unit, an evaporation unit, an SBR (sequencing batch reactor) biochemical unit, an A / O (anaerobic / oxic) biochemical unit and a deep oxidation unit. The utility model also discloses a method for treating the cross-linking agent TAIC production wastewater by using the device, the production wastewater enters the high-temperature alkaline hydrolysis unit after the pH value of the production wastewater is adjusted, a reaction is carried out under a strong alkaline condition, the high-temperature alkaline hydrolysis effluent is adjusted to be weak acid and then is introduced into the evaporator, and the evaporation condensate is treated by adopting an SBR-A / O biochemical treatment process, so that the production wastewater is obtained. The biochemical effluent is deeply oxidized, so that the discharged water meets the nano-tube discharge standard.

The utility model belongs to the technical field of microorganism generators, and particularly relates to a catalytic carrier compound microorganism generator for an SBR (sequencing batch reactor) process, which comprises a barrel, a plurality of uniformly distributed sieve meshes penetrating through the barrel are arranged in the wall of the barrel, a microorganism release island is fixedly mounted in the barrel, and a plurality of microorganism release holes are formed in the barrel. An air guide pipe connector is arranged at the upper end of the microorganism release island, a water sealing piece soft seal is slidably connected to the interior of the barrel, a water sealing piece bottom frame is fixedly connected to the lower end of the water sealing piece soft seal, a flexible rope is fixedly connected to the water sealing piece bottom frame, and an adjusting mechanism is arranged on the flexible rope; and the tail end of the flexible rope is fixedly connected with a floater. According to the utility model, the whole microbial reactor is an integral cylinder body, and the soft sealing linkage of the floater and the water sealing sheet does not cause the dormancy of microorganisms due to water shortage due to the change of the water level of the SBR bioreactor.

The invention provides a method for treating comprehensive wastewater by combining potassium ferrate with oxidation, and belongs to the field of industrial wastewater treatment. The method comprises three stages of wastewater pretreatment and treatment system starting, catalytic oxidation, solid-liquid separation and material regeneration, a Fe3O4 (at) MIP-Azo (at) K2FeO4: Azo-SO3 nanosheet material is combined with potassium hydrogen peroxymonosulfate, a sequencing batch reactor is used for catalytic oxidation treatment of comprehensive wastewater, and the Fe3O4 (at) MIP-Azo (at) K2FeO4: Azo-SO3 nanosheet is recycled after being separated and regenerated. According to the invention, the balance of selective adsorption and broad-spectrum oxidation is realized, the Fe3O4 (at) MIP-Azo (at) K2FeO4: Azo-SO3 nanosheets are used for targeted enrichment of specific pollutants, potassium hydrogen peroxymonosulfate and K2FeO4 are used for full-spectrum oxidation, full-chain treatment of comprehensive wastewater is realized, and the method is especially suitable for deep purification of industrial wastewater with complex components and high toxicity.

A method for realizing short-cut nitrification denitrification by using a cefalexin inhibitor belongs to the field of biological sewage treatment, is used for urban sewage treatment, and comprises the following steps: in a stably operated aerobic sequencing batch reactor, keeping the pH value at 7.4-8.0, the sludge concentration at 3200ml / L, the dissolved oxygen controlled at 1.5 mg / L-2. 7mg / L and the temperature at room temperature in the aerobic sequencing batch reactor; 5 mg / L-15 mg / L of cefalexin is added into the aerobic sequencing batch reactor every day, and short-cut nitrification can be achieved after the operation period is 8 days. According to the method, cefalexin can be added into the aerobic sequencing batch reactor, harsh environmental conditions are not needed, operation is simple, the requirement for the inlet water ammonia nitrogen concentration in the aerobic sequencing batch reactor is not too high, the efficiency of taking out the ammonia nitrogen in the urban domestic sewage is improved, and the economic benefit is increased. And short-cut nitrification in the aerobic sequencing batch reactor can be rapidly realized and stably maintained.

The invention relates to a method for rapidly synthesizing polyhydroxyalkanoate based on segmented feeding oxygen-limiting mixed flora, and belongs to the technical field of solid waste resource utilization. According to the method disclosed by the invention, the functional flora is obtained from the activated sludge through a limited oxygen condition and a feeding mode of separately adding the carbon source and the nutrient solution, so that the synthesis rate of the polyhydroxyalkanoate in a traditional sequencing batch reaction device is effectively improved. In addition, the stability of the polyhydroxyalkanoate synthesized by the functional flora is verified by prolonging the culture time, and the result shows that the polyhydroxyalkanoate can be rapidly and stably synthesized by the functional flora screened under the limited oxygen condition in a sectional feeding mode. The method not only improves the synthesis efficiency of polyhydroxyalkanoate and reduces the production cost, but also has important industrial application value. Through further optimization and large-scale application, the method is expected to play a key role in the fields of environmental protection and bioplastic production.

This invention provides a sequential batch process for treating nitrogen and phosphorus in wastewater. The method includes the following steps: (1) introducing wastewater into an electrochemical reaction device while adding sulfur-containing materials; (2) subjecting the wastewater to an electrochemical reaction under the action of a DC power supply, followed by sequential stirring and aeration; (3) repeating step (2) in a cycle, allowing the wastewater to settle before discharge. This invention achieves immediate start-up, extreme nitrogen and phosphorus removal, and rapid proliferation of sulfur-autotrophic bacteria in the wastewater treatment process by combining intermittent DC power supply with intermittent microaerobic aeration. Furthermore, it eliminates the need to adjust the pH during the wastewater treatment process and improves the service life of the anode.

The invention provides a sewage treatment method beneficial to sludge reduction, and relates to the field of sewage treatment. The sewage treatment method comprises the following steps: adding graphene subjected to surface hydrophilization modification into an activated sludge system, and intensifying the formation of granular sludge through anaerobic-aerobic alternate operation and hydraulic separation in a sequencing batch reactor. The Raman spectrum ID / IG ratio of the modified graphene is less than or equal to 0.2. According to the present invention, the modified graphene provides the microorganism attachment carrier and the electron transfer channel, and the dynamic precipitation control strategy is combined to achieve the rapid formation of the granular sludge, the improvement of the system treatment efficiency and the significant reduction of the excess sludge, such that the method is suitable for the low-carbon and high-efficiency municipal and industrial sewage treatment.

This invention relates to a device and method for rapidly starting a short-cut nitrification process, belonging to the field of water treatment. The invention involves inoculating a secondary sedimentation tank with sludge and adding a polyurethane biological sponge carrier into a sequencing batch reactor (SBR). First, a phased influent influent + incremental post-aeration strategy (increasing aeration time first, then increasing aeration rate) is adopted. This utilizes nitrate and a dynamic oxygen environment to drive the migration of *Candidatus Contendobacter* to the sponge carrier and complete its enrichment and acclimatization, reducing the obstruction of O2 on the endogenous denitrification process of *Candidatus Contendobacter* under aerobic conditions. The phased influent influent is then eliminated, and NH4 is introduced. + -N synthesis wastewater is treated using a low-alkalinity strategy (reducing influent KHCO3 concentration) + post-aeration with an initial increase followed by a decrease in aeration volume, combined with strong NO2 stimulation from Candidatus Contendobacter in a low dissolved oxygen environment. ‑ -N reducing power inhibits NOB growth, enabling rapid start-up of the short-cut nitration process.