118 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 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 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 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.

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.

The invention relates to an anaerobic ammonia oxidation coupled anaerobic digestion system with biological denitrification cooperating with biogas purification and a use method thereof. The system comprises an anaerobic digestion tank, a carbon dioxide absorption device and a PN / A unit, the PN / A unit comprises an anaerobic ammonia oxidation reactor and a sequencing batch reactor; the anaerobic digestion tank is used for providing an anaerobic digestion environment for organic solid waste or organic wastewater, a biogas outlet of the anaerobic digestion tank is connected with the carbon dioxide absorption device, and a digestion liquid outlet of the anaerobic digestion tank is connected with a water inlet of the sequencing batch reactor; the carbon dioxide absorption device is used for absorbing carbon dioxide in gas discharged from the biogas outlet through water so as to purify the biogas; the water outlet of the sequencing batch reactor is connected with the water inlet of the anaerobic ammonia oxidation reactor, the water outlet of the anaerobic ammonia oxidation reactor is connected with the carbon dioxide absorption device, and the liquid outlet of the carbon dioxide absorption device is connected with the water inlet of the anaerobic ammonia oxidation reactor to form a liquid circulation loop. According to the invention, integration of biogas purification, denitrification, sulfur removal and pH self-regulation is realized.

The application discloses a method for strengthening double short-cut anaerobic ammonia oxidation of municipal sewage by means of intermittent aeration and segmented water feeding, and belongs to the field of sewage biological treatment. The double short-cut anaerobic ammonia oxidation is a biological denitrification process dominated by short-cut nitrification, short-cut denitrification and anaerobic ammonia oxidation reaction. The method is characterized in that the double short-cut anaerobic ammonia oxidation process is operated by means of intermittent aeration AOAOAOA, is used for maintaining stable operation of the short-cut nitrification, and provides a stable substrate source for the anaerobic ammonia oxidation bacteria; segmented water feeding is used, 4 / 5 of raw water is pumped into the SBR (Sequencing Batch Reactor) reactor, internal carbon sources are stored under anaerobic conditions, and the remaining 1 / 5 of raw water is pumped into the second aerobic end of the intermittent aeration, so that the COD in the raw water is directly used by the denitrifying bacteria. The method solves the problems of unstable short-cut nitrification, high demand for carbon sources of the short-cut denitrification, long time consumption of the internal source denitrification and the like in the double short-cut anaerobic ammonia oxidation process.

The utility model discloses an SBR (Sequencing Batch Reactor) reaction tank, which relates to the technical field of sewage treatment and comprises a reaction tank main body, a circulating pipe arranged on the reaction tank main body, a water outlet pipe arranged at the edge of one side of the reaction tank main body, a water inlet pipe arranged at the edge of the other side of the reaction tank main body, an aerator pipe arranged at the bottom of the reaction tank main body and an inner partition wall plate arranged in the reaction tank main body, a stirring mechanism is arranged on the reaction tank main body and comprises a mechanism shell arranged above the reaction tank main body, a stirring shaft is movably mounted at the bottom of the mechanism shell, stirring blades are fixedly mounted at the lower end of the stirring shaft, a transmission shaft is movably mounted in the mechanism shell, and a driving motor is fixedly mounted at one end of the mechanism shell; a lifting mechanism is arranged at the bottom of the mechanism shell. And the SBR reaction tank. And through cooperative use of the stirring mechanism and the lifting mechanism, the stirring blades can be separated from sewage when stirring is stopped, the risk that the stirring blades are corroded is reduced, and the service life of the stirring blades is prolonged.

The utility model relates to the technical field of sewage treatment devices, in particular to an SBR (Sequencing Batch Reactor) aeration device which comprises a central rod, the lower end of the central rod is connected with a chassis seat through a butt joint mechanism, the outer side of the central rod is symmetrically and rotationally sleeved with a rotating shell, and a gas dispersion cavity and a water dispersion cavity are arranged between the central rod and the rotating shell; a connecting mechanism is arranged on the side wall of the center rod and arranged in the rotating shell through a mounting mechanism, and a sweeping mechanism is arranged on the side wall of the rotating shell. Through the rotating shell and the drain pipe, the exhaust pipe and the brush which are distributed in the circumferential direction, gas and water are horizontally sprayed to form power for driving the rotating shell to rotate, so that the brush is driven to synchronously rotate for sweeping, and through the gas dispersing cavity and the water dispersing cavity, respective supply and flow control of the water and the gas are conveniently achieved; the drainage pipe, the exhaust pipe and the brush are all of a detachable splicing structure, so that the spraying coverage area of water and gas and the cleaning area of the brush are changed.

The invention relates to the technical field of biological sewage treatment, and discloses a high-efficiency denitrification method based on an anaerobic ammonia oxidation process, the method is operated based on a sequencing batch reactor, and the method comprises a composite conductive matrix construction step and a time sequence pulse maintenance operation step, the method comprises the following steps: firstly, adding ferroferric oxide and ferrous sulfide powder into a sludge mixed solution to construct a composite magnetic biological carrier; in the water inlet stage, local acid microenvironment construction, protective pulse activation and mainstream water inlet and in-situ reconstruction operation are sequentially executed. By controlling the pH value and the dosing sequence, the acidic environment is utilized to trigger ferrous sulfide to release reducing components so as to protect the hydroxylamine metabolism activator from being oxidized, and then the pH value is adjusted back by utilizing mainstream inlet water to induce dissolved ions to generate in-situ flocculation. According to the method, the utilization rate of the activating agent is effectively increased, the problems of carrier surface passivation and sludge loss are solved, and the denitrification efficiency and the operation stability of the system are remarkably enhanced.

This invention discloses a method for treating dyeing and printing wastewater based on an nZVI / AGS coupling process, comprising the following steps: wastewater pre-activation and interface optimization, wherein the dyeing and printing wastewater is introduced into a pre-activation tank; nZVI gradient functionalization modification: nZVI is treated using a "core-shell" approach, with nZVI as the core, and conductive polymer polypyrrole and biochar nanosheets are sequentially coated on it; AGS gradient structure directional cultivation: AGS is cultivated using a "dual substrate-magnetic field induced" cultivation method, wherein sodium acetate and glucose are selected as composite carbon sources in a sequencing batch reactor, with a mass ratio of 3:1, and the C:N:P ratio is controlled at 100:5:1, and magnetic nano-iron oxide particles at a concentration of 20-30 mg / L are added; gradient coupling synergistic degradation: the modified nZVI and the optimized cultured AGS are fed into a three-stage gradient coupling reactor, and the wastewater treated by gradient coupling synergistic degradation enters a photocatalysis-membrane filtration coupling unit for further treatment.

The invention discloses a deep nitrogen and phosphorus removal method for directionally regulating and controlling phosphorus-accumulating bacteria and glycogen-accumulating bacteria in allusion to low-concentration municipal sewage. In a sequencing batch reactor, low-concentration municipal sewage is used as a matrix, and coupling of PAOs / DPAOs and GAOs / DGAOs in aerobic granular sludge is fully utilized to realize deep nitrogen and phosphorus removal of wastewater. In the starting stage, sludge is regularly discharged through an A / O operation mode to rapidly enrich PAOs; in the operation stage, through an A / O / A mode, sludge age control and dissolved oxygen concentration regulation, DGAOs enrichment is realized, conditions are created for DPAOs appearance, NOB is inhibited, and short-cut nitrification endogenous denitrification is promoted. According to the method, the abundance balance of PAOs / DPAOs and GAOs / DGAOs is achieved by adopting a periodic carbon source multiplication coupling PO4 < 3-> concentration control technology and post-anoxic section time length regulation and control in the stable period of the system, at the moment, yellow particles and white particles in the system coexist, the cultured aerobic particles are stable in structure, and synchronous carbon, nitrogen and phosphorus synergistic removal can be achieved. According to the method for directionally regulating and controlling PAOs / DPAOs and GAOs / DGAOs provided by the invention, the removal rate of COD (Chemical Oxygen Demand) in sewage can be more than 90%, and the removal rate of TN (Total Nitrogen) / TP (Total Protein) is nearly 100%.

The utility model provides a reaction device for promoting generation of compact activated sludge, which relates to the technical field of sewage treatment and comprises a main flow SBR (sequencing batch reactor) reaction structure, a side flow SBR reaction structure, a water inlet bucket, a water outlet bucket and an aeration structure. The side flow SBR reaction structure is connected with the main flow SBR reaction structure through a water conveying assembly; the main flow SBR reaction structure is used for taking out sewage from the water inlet barrel and conveying part of the taken-out sewage to the side flow SBR reaction structure; and the side flow SBR reaction structure is used for stirring the sewage through the second stirring mechanism so as to enable the sewage to be in an anoxic state, and discharging the sewage in the anoxic state to the main flow SBR reaction structure after the reaction of the main flow SBR reaction structure is finished. According to the utility model, the technical problems in the prior art that the forming speed of compact activated sludge is relatively slow and the settling performance of the compact activated sludge in the generation process is relatively poor are solved.

The invention discloses a printing and dyeing wastewater treatment method based on an nZVI / AGS coupling process, which comprises the following steps: wastewater pre-activation and interface optimization: introducing printing and dyeing wastewater into a pre-activation pool; performing gradient functional modification on nZVI: treating the nZVI by adopting a'core-shell 'manner; sequentially coating a conductive polymer polypyrrole and a biochar nanosheet by taking the nZVI as a core; aGS gradient structure directional culture: adopting a double substrate-magnetic field induction culture method to culture AGS: in a sequencing batch reactor, selecting sodium acetate and glucose as a composite carbon source, setting the mass ratio of sodium acetate to glucose to be 3: 1, controlling the ratio of C to N to P to be 100: 5: 1, and adding magnetic nano ferroferric oxide particles with the concentration of 20-30mg / L; and gradient coupling synergistic degradation: putting the modified nZVI and the AGS subjected to optimized culture into a three-section gradient coupling reactor, and carrying out advanced treatment on the wastewater subjected to gradient coupling synergistic degradation treatment in a photocatalysis-membrane filtration coupling unit.

The utility model discloses SBR (sequencing batch reactor) equipment for rural domestic sewage treatment, which comprises a treatment tank and a self-priming pump, a plurality of aeration discs are mounted at the bottom of the inner wall of the treatment tank, a water pump guide rail is fixedly mounted in the treatment tank, and a sludge discharge pump is axially connected onto the water pump guide rail in a sliding manner. According to the utility model, anaerobic and aerobic states in the tank can be in an alternating state, the nitrogen and phosphorus removal purification effect is good, the operation effect is stable, sewage is precipitated in an ideal static state, the treatment time is short, the efficiency is high, the effluent quality is excellent, the process is simple, the cost can be effectively saved, and the device has the characteristics of three-period control per day, impact load resistance, high efficiency and the like. Treated water retained in the tank has diluting and buffering effects on sewage, the impact of water quantity and organic dirt can be effectively resisted, each procedure in the technological process can be adjusted according to water quality and water quantity, the operation is flexible, the treatment equipment is less, the structure is simple, and the operation, maintenance and management are convenient.

The application discloses a low-carbon and high-efficiency seawater breeding wastewater treatment device and method, wherein the device comprises a sequencing batch reactor and a modified hollow fiber membrane assembly arranged in the sequencing batch reactor, and is provided with a stirring, constant temperature, monitoring and aeration control unit. The method strengthens the microbial biofilm by the modified membrane assembly, adopts a salinity and antibiotic gradient domestication strategy, constructs a stable simultaneous nitrification and denitrification (SND) process under a low dissolved oxygen (DO<0.2 mg / L) condition, and realizes efficient and collaborative removal of carbon, nitrogen pollutants and antibiotics. The application significantly improves the stability of the system against salinity and antibiotic impact, reduces the aeration energy consumption, effectively solves the problem that the microbial activity is inhibited when the traditional biological process is used to treat high-salinity and antibiotic-containing seawater breeding wastewater, and provides a reliable technical scheme for low-carbon and high-efficiency treatment of seawater breeding wastewater.