1063 results about "Activated sludge" 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 provides an intelligent control method for sewage biological nitrogen removal and denitrification carbon source addition, which combines an ASM activated sludge mechanism model based on a sewage biological treatment mechanism and an AI artificial intelligence model based on data driving to construct an ASM-AI mixed model, can accurately simulate a nitrogen removal and denitrification reaction process in a sewage treatment process, and has the advantages of simple operation, high accuracy and high practicability. On the basis, the optimal carbon source feeding amount is obtained by setting a target function, carbon source feeding in the denitrification process is intelligently controlled, accurate control over carbon source feeding is achieved through real-time data monitoring, ASM-AI mixed model prediction and continuous training of an ASM-AI mixed model, the nitrogen removal efficiency of denitrification is improved, and the nitrogen removal efficiency of denitrification is improved. The carbon source adding cost is saved, and the stability, high efficiency and economical efficiency of biological sewage treatment denitrification are ensured.

The invention relates to a method for treating nitrogen and phosphorus-containing cleaning wastewater, which comprises the following steps: adding residual activated sludge, activated carbon and a nitrogen and phosphorus removal bacterial agent into a treatment system, carrying out braising exposure treatment, and regularly adding an organic carbon source; the nitrogen and phosphorus removal bacterial agent at least contains microbacterium kitamiense (PR) and aeromicrobe (Aeromicrobe tamlense) (PW), and is characterized in that the nitrogen and phosphorus removal bacterial agent at least contains the microbacterium kitamiense (PR) and the aeromicrobe tamlense (PW); the preservation numbers of the strain are respectively CGMCC (China General Microbiological Culture Collection Center) No. 25182 and CGMCC No. Starting water feeding after braising exposure is finished, and continuously operating to treat the cleaning wastewater. According to the method, total nitrogen, total phosphorus and COD in the wastewater can be efficiently removed at the same time in one structure, the treatment burden of a subsequent biochemical unit is avoided, the process is simple, and the cost is low.

The invention discloses a dynamic microorganism recognition statistical method and system based on a microbial population analyzer, and belongs to the technical field of microorganism statistics. Activated sludge is quantitatively implanted into a glass slide, a panoramic scanning image is collected based on a biological microscopic system, and environment distribution characteristics are analyzed and obtained based on the panoramic scanning image. The method comprises the following steps: continuously observing an observation area based on a biological microscopic system to obtain a time sequence diagram of a single observation area; and carrying out pixel point matrix on the time sequence diagram, and eliminating a static background to obtain a differential image of the dynamic microorganisms. And based on the differential image of the dynamic microorganisms, identifying and extracting the contour features of the microorganisms by adopting an image analysis technology, and identifying the types and quantity of the microorganisms. According to the method, the observation area is accurately positioned based on environment distribution characteristic analysis, the static background is eliminated based on the time sequence diagram, the characteristics of the dynamic microorganisms can be accurately captured, the types and the number of the microorganisms can be rapidly analyzed and obtained based on existing mature image analysis, and good practicability is achieved.

The invention discloses a landfill leachate anaerobic-denitrification treatment process and system based on waste molasses synergistic interaction, and belongs to the technical field of sewage treatment. The process comprises the following steps: (1) carrying out two-stage anaerobic digestion on the landfill leachate to remove organic matters and recover biogas, wherein first-stage anaerobic digestion adopts medium-temperature (35 + / -2 DEG C) anaerobic digestion, and second-stage anaerobic digestion adopts high-temperature (55 + / -1 DEG C) anaerobic digestion; (2) removing impurities from the waste molasses, diluting the waste molasses, mixing the diluted waste molasses with activated sludge, fermenting under an anaerobic condition to generate fermentation liquor rich in volatile fatty acid, and adding the fermentation liquor into a denitrification reactor; and (3) constructing an anaerobic-denitrification synergistic system, and increasing the denitrification rate by using the charcoal-loaded nano zero-valent iron (nZVI at BC) as an electronic mediator. According to the method, resource utilization of the waste molasses is realized, the problem of imbalance of the carbon nitrogen ratio of the landfill leachate is solved, anaerobic digestion and nitrification and denitrification processes are coupled, efficient nitrogen removal and organic matter removal are realized, and meanwhile, the sludge yield and the operation cost are reduced.

The invention provides an inoculum domestication method for relieving acid or ammonia nitrogen inhibition of an anaerobic fermentation system, which comprises the following steps of: carrying out constant-temperature anaerobic fermentation culture at medium temperature (30-35 DEG C) or high temperature (50-55 DEG C) until the gas yield is stable by taking livestock manure, activated sludge, industrial anaerobic digestion residues or mineralized refuse biogas fermentation liquor and the like as inoculums; the obtained inoculum is an inoculum which has relatively strong acid tolerance or ammonia nitrogen tolerance after domestication. The domesticated inoculum with good tolerance and the original untreated inoculum are mixed according to a certain proportion and then put into an anaerobic fermentation system, and wet fermentation (TS = 5-10% and total solid content) or dry fermentation (TS = 20-30%) is carried out, so that the pH value of the anaerobic fermentation system is recovered to a state suitable for growth of methanogens.

The invention discloses a microbial electrochemical efficient preparation method and application of metal nanoparticles, the metal nanoparticles are prepared and synthesized by regulating the redox metabolism behavior of microorganisms through positive / negative constant potential, and the microorganisms are electroactive microorganisms domesticated and cultured by activated sludge or single bacteria; the metal nanoparticles are in a solid state of a metal simple substance, are formed on the surface of an electroactive biological membrane, and are generated by electroactive microorganisms through extracellular electron transfer dissolved-state metal salt reduction. The palladium or silver and other metal nanoparticles prepared by the method are uniformly distributed on the surface of the electroactive biological membrane, the particle size is 1-10nm, the electroactive biological membrane-metal nanoparticle complex has extremely strong reducibility, and the electroactive biological membrane-metal nanoparticle complex is used for treating a non-biodegradable organic pollutant (4-chlorophenol), so that compared with a non-electroactive biological membrane and a treatment group without metal ions, the electroactive biological membrane-metal nanoparticle complex has the advantages that the biodegradability is greatly improved; the degradation effect is the best.

The invention belongs to the technical field of biological sewage treatment, and relates to a bacteria-algae particle preparation method and system for promoting bacteria-algae system granulation based on pressure response. The preparation method comprises the following steps: co-culturing the mixed microalgae cultured to a logarithmic phase and aerobic activated sludge in a photobioreactor, in the culture process, jointly regulating and controlling aeration, a carbon source and inlet and outlet water to promote granulation of a bacteria-algae system according to the principle of'pressure-induced stress response ', and controlling dissolved oxygen levels in different periods according to the principle of'unbalanced air supply' during aeration regulation and control; the carbon source regulation follows the principle of unbalanced nutrition to control the COD concentration in different time periods; the water inlet and outlet regulation follows the principle of reducing the settling time, and the water change settling time is gradually shortened in the culture period. The bacteria-algae granular sludge which is good in settling performance, high in dirt-removing power and compact in structure is prepared, the prepared bacteria-algae granular sludge is used for treating sewage and wastewater, pollution of carbon, nitrogen, phosphorus and the like can be efficiently solved, the effluent quality is effectively improved, and carbon emission reduction in the sewage treatment field is promoted.

The invention relates to a compound soil improvement fertilizer and a preparation process thereof, and belongs to the technical field of agricultural environmental protection. The fertilizer is prepared from a modified biochar carrier, a compound microbial agent, an organic fermentation substrate and an inorganic mineral component. The modified charcoal carrier forms a hierarchical pore structure through acid modification and mineral loading; the compound microbial agent comprises phosphate solubilizing bacteria, nitrogen-fixing bacteria and organic matter degrading bacteria; the organic fermentation substrate is prepared from mushroom bran, activated sludge and corncob through segmented fermentation; the inorganic mineral component comprises attapulgite and dolomite powder. The preparation process comprises the steps of biochar modification treatment, microorganism composite culture, organic matrix segmented fermentation and slow-release coating granulation. The fertilizer can synchronously improve the physical structure, chemical properties and microbial ecology of soil, significantly improve the nutrient utilization efficiency, reduce the application amount of the chemical fertilizer, effectively repair degraded soil and enhance the stress resistance of crops.

The invention relates to the field of water treatment, and particularly discloses a method for preparing a catalyst based on Fenton iron sludge and activated sludge, the prepared catalyst and application, the method comprises the following steps: S1, crushing and sieving Fenton iron sludge, activated sludge and a binder; s2, mixing the sieved Fenton iron mud, activated sludge and binder with a pore-forming agent and carbon powder, and then adding a transition metal salt solution to prepare a primary mixture; s3, the primary mixture is dried after being formed, a blank is formed and then subjected to pyrolysis treatment, and the catalyst is prepared; the invention also discloses the catalyst prepared by the method and application of the catalyst in water treatment. According to the application, resource utilization of the Fenton iron sludge and the activated sludge is realized, the problem of enrichment of organic matters and heavy metals in wastewater in a current Fenton iron sludge resource technology is solved, the prepared catalyst can be used for catalyzing ozone, hydrogen peroxide or persulfate to degrade the organic matters in the wastewater, and the preparation method of the catalyst is simple.

The invention discloses a culture tail water resource treatment system based on pearl mussels, which belongs to the technical field of aquaculture and water environment protection and comprises a culture pond, a plurality of first treatment ponds, at least one second treatment pond, a third pipeline and a control unit. Each first treatment pond is connected with the culture pond through a first pipeline, activated sludge is laid in each first treatment pond, and an aeration device and an adsorption filter with the height capable of being adjusted through a lifting mechanism are arranged on each first treatment pond. The second treatment pond is connected with the first treatment pond through a second pipeline, the interior of the second treatment pond is divided into a phycomycete symbiotic area and a water quality purification area, the water quality purification area sequentially comprises a supporting layer, an adsorption layer and a substrate layer from bottom to top, and various aquatic plants are planted in the substrate layer. The third pipeline is connected with the second treatment pond and the culture pond to form a closed water treatment circulation loop. The control unit is responsible for monitoring and regulating the operation state of the system. According to the system, efficient purification and resource recovery of aquaculture tail water are realized through multi-stage treatment and cyclic utilization.

The invention discloses a method for treating printing and dyeing wastewater based on an aerobic granular sludge technology, which comprises the following steps: culturing and domesticating aerobic granular sludge: adopting a sequencing batch activated sludge reactor with a large height-diameter ratio, adding high-load simulated printing and dyeing wastewater into the reactor, and starting to culture the aerobic granular sludge; treating the printing and dyeing wastewater by using the aerobic granular sludge: treating the printing and dyeing wastewater by using the cultured and domesticated aerobic granular sludge; carrying out biological aerated filter pretreatment: carrying out starting and biofilm formation by adopting simulated wastewater; advanced treatment with a double-membrane process: treating the effluent with the double-membrane process, wherein ultrafiltration adopts a high-strength hollow fiber membrane module, and the operation mode is an external pressure mode; an anti-pollution membrane assembly with pollution resistance, high desalination rate and high water yield is adopted for reverse osmosis, and by adjusting operation parameters of a double-membrane process, the effluent quality meets the water quality requirement of recycled water in the textile dyeing and finishing industry.

The invention belongs to the technical field of wastewater treatment and energy recovery, and provides a regulation and control method for promoting anaerobic acid production by taking soybean molasses as a substrate through cooperation of ferroferric oxide and bamboo charcoal. Soybean molasses is used as a substrate carbon source, anaerobic activated sludge is inoculated in a medium-temperature SBR reactor, the volume ratio of reactor inflow sewage to sludge is 2: 1, ferroferric oxide and bamboo charcoal composite conductive particles which are subjected to ball milling treatment and have the concentration of 1 g / L are added to promote an anaerobic fermentation system to produce acid, and then anaerobic fermentation is carried out. The mass ratio of ferroferric oxide to bamboo charcoal in the ferroferric oxide and bamboo charcoal composite conductive particles is (1: 2)-(2: 1); monitoring the acid yield, the pH value change and the product type; and the variety and concentration of the acid-producing substance are analyzed, and the interaction of all the components in the reaction process is evaluated. The acid production rate and the total acid production amount in the anaerobic acid production process are obviously improved. And the activity of anaerobic flora is promoted. The variety distribution of acid-producing substances is obviously optimized, and the stability of the acidification process is improved.

The invention discloses a preparation method and application of sludge-based biochar loaded with group sensing signal molecules (AHLs) and extracellular polymeric substances (EPS). The preparation method comprises the following steps: culturing, crushing and concentrating waste anaerobic granular sludge (AnGS) to extract AHLs; the method comprises the following steps: washing AnGS, heating in a water bath, and centrifugally extracting EPS; and then drying and grinding the AnGS, stirring in a constant-temperature water bath, pyrolyzing, washing and grinding to prepare biochar, and finally freeze-drying to load the AHLs and the EPS on the sludge-based biochar. The loaded sludge-based biochar can be used as a redox mediator, is applied to the field of anaerobic digestion of wastewater, and aims to improve extracellular electron transfer and enhance the anaerobic treatment efficiency of refractory wastewater. The method has the advantages that the prepared loaded sludge-based biochar has a good removal effect on organic pollutants, meanwhile, the waste activated sludge can be recycled, waste is treated with waste, environmental pollution is reduced, resources are recycled, and cost is saved. In addition, the method has good application value in the aspects of soil remediation, catalysis and the like.

The invention provides a phycomycete symbiotic system capable of degrading microplastics as well as a construction method and application of the phycomycete symbiotic system, and belongs to the technical field of biological treatment of wastewater. The method comprises the following steps: mixing an algae mixture, aerobic activated sludge and microplastics, and carrying out enrichment culture to obtain an enrichment culture; screening and separating a part of the enrichment culture to obtain at least two pure algae species, and extracting the other part of the enrichment culture to obtain a bacterial filtrate; and mixing the pure algae species, the bacterial filtrate and the microplastics for algae-bacteria co-culture to obtain the algae-bacteria symbiotic system capable of degrading the microplastics. The phycomycete symbiotic system capable of degrading the microplastics is constructed by adopting the method disclosed by the invention, so that the time cost and the economic cost for culturing and obtaining germplasm resources are greatly reduced; and the phycomycete symbiotic system can perform in-situ degradation on the micro-plastics at normal temperature, and is simple to operate and convenient to popularize and use.

The invention relates to the technical field of sewage treatment equipment, and discloses a solar power aeration oxygenation device and system.The solar power aeration oxygenation device comprises a sewage pool, an exhaust fan is fixedly installed on the outer wall of the sewage pool, an air inlet of the exhaust fan is communicated with an air supply assembly, and an air outlet of the exhaust fan is communicated with an air conveying pipe; according to the invention, the rotatable vertical pipe and the aeration pipe arranged along the axis perpendicular to the vertical pipe are arranged, the aeration holes are distributed on the aeration pipe, the sleeve sleeves the aeration pipe, and the rotation of the sleeve can control the opening and closing of the aeration holes; deposited activated sludge can be stirred before aeration in a mode that the vertical pipe drives the aeration pipe to rotate, so that the activated sludge drifts into a water body, then after the aeration holes are opened through rotation of the sleeve, the water body is stirred at the moment, the sludge drifts into the water body, and the aeration holes are not blocked by the sludge, so that the aeration efficiency is improved. The gas immediately participates in the oxidation reaction when being injected into the water body, so that the energy utilization rate is greatly improved.

The invention provides an intelligent self-adaptive control method and system for sewage aeration, and is applied to the field of intelligent control of activated sludge process sewage treatment. The method comprises the steps that inlet water quality parameters are collected through a sensor array, abnormal fluctuation is recognized through a support vector machine, the sudden increase probability of pollutant concentration is calculated by combining a neural network with a historical mode, and when a threshold value is exceeded, a response delay index is calculated based on inlet water flow and biochemical kinetic parameters; generating an oxygen injection sequence according to the real-time dissolved oxygen data so as to regulate and control aeration equipment, and performing closed-loop feedback regulation according to the real-time dissolved oxygen data; by means of the scheme, pollution impact can be predicted in advance, system lag can be compensated, accurate matching of oxygen supply and loads on the time sequence is achieved, the quality stability of outlet water is effectively improved, and energy consumption is reduced.

The invention discloses an algae species with both efficient denitrification and high free ammonia tolerance and application thereof. The invention provides an inflatedfruit senna herb which is preserved in China General Microbiological Culture Collection Center (CGMCC) on December 11, 2024, and the preservation number of the inflatedfruit senna herb is CGMCC No.46280. The inflatedfruit senna herb has the advantages that the inflatedfruit senna herb is preserved in the China General Microbiological Culture Collection Center (CGMCC); the inflatedfruit senna provided by the invention has efficient assimilation removal capability on NO3 <->-N, NO2 <->-N and NH4 < + >-N, and has relatively strong tolerance on high-concentration free ammonia (FA). A bacterial-algae symbiotic system is constructed by the inflator and activated sludge, and is coupled with a dynamic membrane process, so that the denitrification efficiency of the nitrogen-containing wastewater can be remarkably improved, the addition of exogenous organic matters, the aeration energy consumption and the N2O emission are reduced, meanwhile, high-value microalgae biomass is obtained, and efficient, stable and resourceful treatment of the nitrogen-containing wastewater is realized.

The present disclosure provides an information processing method and the like, in which sludge or an effluent in an effluent treatment system using an activated sludge method can be optimized. The information processing method causes a computer to execute processing of generating a trait model indicating a trait of an effluent treatment system, on the basis of effluent information including information of an effluent in the effluent treatment system using an activated sludge method and bacteria added to the effluent, and sludge information of sludge in the effluent treatment system.

The invention discloses a phycomycete symbiotic system and application of the phycomycete symbiotic system in treatment of aquaculture tail water, and belongs to the technical field of tail water treatment. The phycomycete symbiotic system comprises chlorella, scenedesmus and activated sludge, and the initial inoculation dry weight ratio of the chlorella to the scenedesmus to the activated sludge is 1: 1: 6. And exogenously adding octanoyl-L-homoserine lactone or tetradecanoyl-L-homoserine lactone into the phycomycetes symbiotic system, so as to construct the phycomycetes symbiotic system with enhanced functions. On the basis of a mixed algae-bacteria symbiotic system with an optimized ratio, directional enhancement of functions is realized by virtue of quorum sensing signal molecules, the stability and resistance gene interception capability of the quorum sensing signal molecules under the stress of antibiotics are verified, and finally efficient purification of the aquaculture tail water is realized. According to the invention, the blank of the prior art in the aspects of advanced regulation and control of a phycomycete synergistic mechanism and synergistic treatment of emerging pollutants is filled up.

The invention discloses a wastewater treatment plant modeling method and system based on a physical information neural network. The method comprises the following steps: acquiring and inputting working condition parameters and inlet water quality data to a neural network model, and performing forward calculation to obtain predicted outlet water state variables and key kinetic parameters; determining a first deviation based on a difference value between the predicted effluent and an actual measurement value, and substituting the predicted variable and the parameter into an activated sludge mechanism differential equation set to calculate a residual error so as to obtain a second deviation; performing weighted summation on the two deviations to form a total optimization target, and performing iterative training according to the total optimization target to obtain a final model; different working condition parameters are substituted into the model for multiple times of forward deduction, and finally in combination with energy consumption data, the working condition with the lowest energy consumption meeting the effluent standard is determined as the optimal process control parameter. By implementing the technical scheme provided by the invention, the actual operation energy consumption meeting the effluent quality standard is reduced.

The invention discloses sludge-based nano biochar, a preparation method and a compost regulation and control method, and relates to the technical field of environmental engineering and resource recycling, and the preparation method comprises the following steps: successively carrying out dehydration treatment, drying treatment and crushing treatment on initial activated sludge to obtain crushed dry sludge; soaking the crushed dry sludge in a citric acid solution with a preset concentration, and drying after a first preset soaking time to obtain pretreated sludge; carrying out carbonization treatment on the pretreated sludge by utilizing a pyrolyzing furnace to obtain primary biochar; mechanically grinding the preliminary biochar by using a ball mill to obtain preliminary nano biochar; and soaking the primary nano-biochar in a citric acid solution for a second preset soaking time, and then treating the primary nano-biochar with a hydrogen peroxide solution to obtain the sludge-based nano-biochar. The technical problem that limitation exists in the aspects of gas emission reduction efficiency, composting efficiency and product quality improvement in the prior art is solved.

The invention relates to the technical field of wastewater treatment, in particular to a method for constructing a quick-response accurate evaluation model for the stability of a wastewater biochemical system. The method comprises the following steps: acquiring an activated sludge image sample at the tail end of an aeration tank and effluent quality information of a sedimentation tank; generating microorganism composition information in the aeration tank activated sludge according to the aeration tank activated sludge image sample; generating biochemical system rating information matched with the activated sludge composition information according to the effluent quality information of the sedimentation tank, the microorganism composition information in the activated sludge of the aeration tank and a preset water quality evaluation system; and repeatedly acquiring the active sludge composition information and the biochemical system rating information, and storing the active sludge composition information and the biochemical system rating information generated each time to generate the rapid response wastewater biochemical system stability accurate evaluation model. The invention provides an evaluation model which can be quickly obtained, is high in timeliness, is not interfered by human factors, and is high in accuracy and reliability for the field of wastewater treatment.

The utility model discloses an advanced treatment system for high-concentration nitrogen-containing organic wastewater, which sequentially comprises an anaerobic tank, an anoxic tank, an aerobic tank, a secondary sedimentation tank, a sulfur autotrophic denitrification filter tank and a limestone filter tank, a water passing hole is formed in the upper part of a wall body between the anaerobic tank and the anoxic tank, a hollow aeration fiber membrane assembly is arranged in the anoxic tank, an aeration pipe is arranged at the bottom of the aerobic tank, a mixed liquid reflux pump is arranged at the bottom of the aerobic tank in a penetrating manner and is connected with the anoxic tank through a pipeline, and the aeration pipe is connected with the anoxic tank through a pipeline. A sludge reflux pump penetrates through the bottom of the secondary sedimentation tank and is connected with the anaerobic tank through a pipeline. Iron-carbon micro-electrolysis is intervened in the anaerobic reactor to achieve the purposes of improving the biodegradability of high-concentration degradation-resistant wastewater and enhancing biochemical treatment, and the nitrogen removal mode of anaerobic section MABR bubble-free aeration synchronous nitrification and denitrification is organically combined, so that the treatment load of the system and the utilization rate of activated sludge are improved.

The invention relates to the technical field of sewage defluorination, and discloses a sewage defluorination method for enhancing coagulative precipitation by using residual activated sludge microorganisms, which comprises the following steps: (1) activated sludge microorganism adsorption; (2) removing fluorine by coagulating sedimentation and microbial flocculation; the method comprises the following steps: (1) a polymerization stage: adding a fluorine removal agent into a coagulative precipitation tank, and carrying out mixed reaction on the fluorine removal agent and fluoride, phosphate ions and the like in sewage to form a polymer; (2) a flocculation stage: adding cation PAM and activated sludge microorganisms into a coagulative precipitation tank, and further performing chemical flocculation and microbial flocculation; (3) a precipitation stage: chemical sludge and biological sludge generated in the coagulative precipitation tank are precipitated to realize sludge-water separation, and the sludge is discharged to a sludge storage tank; and (3) sludge dewatering. According to the method, the reutilization of residual activated sludge microorganisms of a sewage plant is realized, and the fluorine removal effect of a conventional coagulating sedimentation method is enhanced through adsorption of the activated sludge microorganisms on fluorides and microbial flocculation.

The invention belongs to the technical field of biomass anaerobic treatment, and particularly discloses a method for preparing methane through biomass anaerobic digestion based on oxygen nano bubble water. Biomass, activated sludge, oxygen nano bubble water and water are mixed, anaerobic digestion treatment is carried out, and methane is obtained. By introducing high-stability oxygen nano bubble water, a suitable micro-aerobic environment is provided for facultative anaerobic bacteria, so that the metabolic activity of the facultative anaerobic bacteria is activated, the decomposition and conversion of complex organic matters are accelerated, and the efficiency of a hydrolytic acidification stage is remarkably improved. Compared with a traditional chemical or physical pretreatment mode, the method has the advantages that interference on anaerobic flora is avoided, the degradability of a substrate is effectively enhanced, and more sufficient organic acid is provided for a subsequent methane production stage, so that the yield of methane is increased.

The utility model belongs to the technical field of sewage treatment, and particularly relates to high-strength integrated large metal equipment for biological sewage treatment, which comprises a water inlet pipe, a water outlet pipe, sewage, activated sludge, an aeration oxygen supply device and a metal shell so as to form a pool-shaped biological sewage treatment system. A metal shell on the periphery of the pool-shaped biological sewage treatment system is composed of hollow double-layer metal composed of two layers of metal plates and a core pipe in the middle, the hollow double-layer metal is formed through hot air copper brazing of the core pipe, and an air channel and a flow channel are formed between the inner gap and the outer gap of the core pipe. The activated sludge is formed by combining an oxidation ditch and an MBR, the aeration oxygen supply device comprises a fixed rubber aeration pipe, and the metal shell is made of a stainless steel material.The device has a heat preservation measure, the sludge activity can be improved, the equipment strength is high, the overall installation efficiency of the equipment is high, rapid splicing is achieved, and the service life of the equipment is prolonged. Compared with other large-scale sewage biological treatment equipment, the cost is lower.

The present invention relates to the technical field of wastewater treatment devices, and particularly to a wastewater treatment equipment for municipal engineering. It includes a reaction tank, the reaction tank is fixedly connected with a U-shaped pipe, the U-shaped pipe is fixedly connected and communicated with an air inlet pipe, a water pump is installed in the reaction tank, a discharge pipe is installed in the reaction tank, both ends of the U-shaped pipe are respectively communicated with the output end of the water pump in the reaction tank and the discharge pipe, the discharge pipe is fixedly connected with circumferentially uniformly distributed adapter pipes, the adapter pipes are slidably connected with moving pipes, and the moving pipes are slidably connected with spray heads. When one of the spray heads is damaged, the present invention disconnects the adapter pipe adjacent to the damaged spray head from the adjacent moving pipe, increases the water pressure and flow rate at the remaining spray heads, expands the disturbance range of the water flow sprayed by the remaining spray heads, maintains the fluidity of the mixed liquid in the reaction tank, and ensures the normal growth and reproduction of aerobic microorganisms in the activated sludge.

The invention provides a BDO (1, 4-butanediol) wastewater treatment process with high sulfate content, which comprises the following steps: carrying out electrochemical oxidation treatment on BDO (1, 4-butanediol) wastewater with high sulfate content; introducing the obtained BDO wastewater into an anaerobic reaction device for anaerobic reaction to reduce sulfate ions into hydrogen sulfide and oxidize organic matters to reduce COD (Chemical Oxygen Demand); effluent sequentially flows back to the circulating desulfurization device and the air floatation device; carrying out aeration treatment in the circulating desulfurization device so as to oxidize hydrogen sulfide into elemental sulfur; elemental sulfur is recycled in the air flotation device, and part of effluent of the air flotation device and part of effluent of the anaerobic reaction device flow back to inlet water of the anaerobic reaction device; part of effluent of the air floatation device and part of effluent of the anaerobic reaction device are combined and then are sequentially introduced into an aerobic activated sludge tank with a membrane bioreactor and an ozone catalytic oxidation tank. Effluent can enter a subsequent ultrafiltration reverse osmosis membrane system to be purified, and water produced by the membrane system is recycled as reclaimed water.

The invention relates to a rotatable tubular aerator which comprises an aeration pipe part, a tubular aerator part and a rotating part, the aeration pipe part comprises aeration branch pipes, a regulating valve and a connecting pipe, the tubular aerator part is composed of tubular aerators which are uniformly distributed and a middle disc, and the rotating part comprises a motor, a supporting cross beam and a rotating shaft. The aeration branch pipes are connected with the aeration main pipe through the regulating valves, the aeration air volume can be regulated by the regulating valves, and the plurality of L-shaped tubular aerators are uniformly distributed in a circular array; the rotating shaft is connected with the motor and the tubular aerator part, the supporting cross beam maintains the structural stability of the whole device, and the rotating shaft drives the middle disc and the tubular aerator to rotate. The rotation of the tubular aerator is realized through the rotating shaft, so that the aeration efficiency can be improved, a strong mixing and stirring effect is formed in the whole aeration tank, activated sludge is always kept in a suspended state, and meanwhile, the bottom of the aeration tank is not deposited.