262 results about "Hydraulic retention time" patented technology

The invention discloses a sewage treatment method, system and device based on a neural network model and a medium, and relates to the technical field of sewage treatment.By monitoring water quality parameters such as inflow total phosphorus concentration in real time, neural network model input data are preset to always reflect the current actual working condition instead of prediction based on outdated or fixed data, and the accuracy of sewage treatment is improved. The timeliness and accuracy of dosing amount prediction are ensured, and the hysteresis of traditional off-line detection is eliminated to realize real-time regulation and control. A plurality of treatment schemes are obtained by generating different combinations of dissolved gas amount and hydraulic retention time, each treatment scheme corresponds to different minimum dosage, and on the premise of ensuring that the sewage treatment effect meets the effluent total phosphorus concentration limit value, the treatment scheme corresponding to the minimum sewage treatment cost is taken as a target scheme, so that the sewage treatment efficiency is improved. According to the decision-making mode based on cost optimization, the most economical operation scheme can be selected from a plurality of feasible schemes, so that the sewage treatment cost is effectively reduced on the premise that the total phosphorus concentration requirement of effluent is met.

The invention relates to the field of town sewage treatment, in particular to a town sewage carbon-nitrogen-phosphorus synergistic advanced treatment method based on biological manganese oxide. The method comprises the following steps: S1, configuring an upward flow denitrification filter tank; s2, a starting stage: taking a mixed solution of secondary effluent and secondary influent water of an actual town sewage treatment plant and manganese sulfate as influent water of a denitrification filter tank with the manganese concentration of 3.0 mg / L, inoculating hydrolytic acidification bacteria, denitrifying bacteria, anaerobic ammonium oxidation bacteria and manganese oxidation bacteria into the denitrification filter tank, and gradually increasing the ratio of the secondary influent water to the secondary effluent water in the mixed solution to 3%; s3, a stable stage: taking a mixed solution of secondary effluent and secondary inlet water of an actual town sewage treatment plant and manganese sulfate as inlet water of the denitrification filter tank, controlling the manganese concentration to be 3.0 mg / L, controlling the hydraulic retention time to be 3-4 hours, and controlling the backwashing period to be 9-11 days. The method can synchronously and efficiently remove carbon, nitrogen and phosphorus in the secondary effluent of the actual town sewage treatment plant at low cost.

The invention belongs to the technical field of pharmaceutical wastewater treatment, and particularly relates to a device and a method for treating antibiotic production wastewater by coupling catalytic hydrolysis and catalytic degradation. The device comprises a catalytic hydrolysis reactor and an electro-catalysis reactor, the two reactors are connected in series through a pipeline with a water stop valve, the catalytic hydrolysis reactor is divided into a plurality of compartments by water baffles, and each compartment is filled with a catalytic porous hydrolysis filler; and a cathode, an anode and a stirrer are arranged in the electro-catalytic reactor. By utilizing the porous hydrolysis filler in the device, selective catalytic hydrolysis of high-concentration antibiotics in wastewater is completed by controlling the hydraulic retention time, the anodic oxidation efficiency is improved by virtue of the high contact reaction area of the porous blocky anode, and efficient mineralization degradation of residual antibiotics and hydrolysates thereof is realized. The treatment device and method for the antibiotic production wastewater are good in selective hydrolysis effect, high in mineralization degradation efficiency, easy and convenient to operate and maintain and low in energy consumption.

The invention relates to the field of wastewater treatment, and discloses a method for treating nitrogen-containing wastewater based on sulfur autotrophic DNRA and anaerobic ammonia oxidation, which comprises the following steps: firstly, introducing nitrogen-containing wastewater into an Anammox reactor, inoculating granular sludge taken from a secondary sedimentation tank of a sewage treatment plant into the Anammox reactor, carrying out anaerobic ammonia oxidation reaction, controlling hydraulic retention time, and carrying out anaerobic ammonia oxidation treatment on the sludge; the method comprises the following steps: pumping effluent and sulfur source inlet water into an sDNRA reactor together, inoculating ordered batch sDNRA sludge into the sDNRA reactor, performing DNRA action under sulfide driving in a stirring state, and controlling hydraulic retention time to realize automatic effluent. According to the method disclosed by the invention, a carbon source does not need to be added, byproducts generated along with complex carbon metabolism can be effectively reduced, the cost can be effectively reduced while secondary pollution is avoided, the total nitrogen removal rate of the system can be successfully improved, and the generation of greenhouse gas N2O is reduced.

The invention relates to the technical field of sewage treatment, in particular to a multistage fermentation acid production preposed phosphorus recovery device which comprises an aerated grit chamber, a fermentation primary sedimentation tank, a preposed sequencing batch type phosphorus removal system, a treatment and discharge system and a recovery system, the aerated grit chamber is connected with an external sewage pipeline, the fermentation primary sedimentation tank is arranged on one side of the aerated grit chamber, and the preposed sequencing batch type phosphorus removal system is arranged on the other side of the aerated grit chamber. The front sequencing batch dephosphorization system is communicated with the fermentation primary sedimentation tank, and the treatment and discharge system is communicated with one side of the front sequencing batch dephosphorization system. Compared with the prior art, by arranging the fermentation primary sedimentation tank and reasonably controlling the hydraulic retention time and the sludge concentration, not only are fermentation conditions in the tank optimized, but also unnecessary stirring energy consumption and excessive sludge treatment requirements are reduced, the operation cost is reduced, and meanwhile, the sludge load of a subsequent system is effectively reduced.

The invention relates to the technical field of water quality detection, and discloses a water supply network water quality abnormity tracing method and system based on data fusion, and the method comprises the steps: carrying out the time alignment of water quality parameter data of distributed monitoring points in a water supply network, and obtaining a standardized water quality parameter sequence; according to the measurement precision of the parameters in the standardized water quality parameter sequence, distributing the weight coefficient of the parameters, and according to the hydraulic retention time in the water supply network, correcting the weight coefficient to obtain a correction coefficient of the water quality parameter data; performing weighted fusion on the standardized water quality parameter sequence based on the correction coefficient to obtain a fusion feature vector; constructing a node connection relation matrix according to the topological structure data of the fusion feature vector; performing anomaly tracing on the fusion feature vector according to the node connection relation matrix to obtain an anomaly result; a pollution source in the water supply network is positioned according to the abnormal result, and a water quality early warning signal is generated; the accuracy of water quality abnormity tracing can be improved.

The invention relates to the field of expressway service area wastewater treatment, in particular to an expressway service area wastewater treatment method based on anaerobic ammonia oxidation enhanced AOOA-MBBR. The method comprises the following steps: 1, preparing a reactor; 2, starting the reactor and inoculating bacteria, and in the step, gradually shortening the hydraulic retention time to 20 hours after the effluent stably runs for a preset time; step 3, anaerobic ammonium oxidation strengthening: after the effluent stably runs for a preset time, respectively replacing part of filler in each tank by using filler of biofilm-forming anaerobic ammonium oxidation bacteria; the concentration of dissolved oxygen in the first aerobic tank is 0.2 mg / L, and the concentration of dissolved oxygen in the second aerobic tank is 0.5-0.8 mg / L; manganese sulfate is added into part of the wastewater of the highway service area, and then the wastewater is directly pumped into the second anoxic tank; and 4, after the effluent is stable, entering a stable stage. When the hydraulic retention time is 20 hours, the total nitrogen and total phosphorus of the effluent can reach corresponding emission standards, so that the wastewater treatment efficiency of the highway service area is improved, and the problem of trouble in subsequent phosphorus removal is avoided.

The utility model discloses a sewage treatment device. Comprising a reaction shell, a water outlet channel for discharging treated water is arranged on the inner side of the upper part of the reaction shell; a water inlet pipe for feeding sewage is arranged at the bottom of the reaction shell; a perforated plate for supporting filler balls is arranged above the water inlet pipe, and the filler balls inoculated with activated sludge are arranged on the perforated plate; and an aeration pipe is arranged in the reaction shell on the lower side of the water inlet pipe. According to the utility model, the problem of maintenance of high-concentration sludge is solved, the concentration of sludge in the aeration tank can be effectively improved, the concentration of activated sludge in the aeration tank is not limited by hydraulic retention time and sludge discharge cycle, and meanwhile, due to more sludge anoxic and anaerobic zones arranged in the sludge maintenance device, the denitrification reaction is more facilitated, and the denitrification efficiency is improved. Therefore, the total nitrogen removal effect is better.

The invention belongs to the field of constructed wetland water treatment, and particularly relates to a wetland substrate combination and evaluation method based on hydraulic performance, a combined substrate is used for establishing a wetland model, a tracer experiment method is used for testing the hydraulic performance of the substrate, and a retention time distribution curve is drawn; calculating the average hydraulic retention time, the effective volume ratio, the water flow dispersion degree, the standard flow dispersion and the hydraulic efficiency on the basis of the retention time distribution curve; and performing weighted calculation on the effective volume ratio, the water flow dispersion degree, the standard flow dispersion degree and the hydraulic efficiency according to weights to obtain a comprehensive performance index, and evaluating the advantages and disadvantages of the matrix according to the comprehensive performance index. The data of the method are easy to obtain, the result can be quickly output, and the feasibility is high.

The invention discloses a sewage plant water quality prediction and management operation method, a computer program product and an electronic product, and belongs to the technical field of water quality prediction.The method comprises the steps that a water quality prediction model is constructed, the water quality prediction model comprises a GeoMAN model and a time sequence model which are cascaded, and the GeoMAN model comprises an HRT dislocation compensation module; the dynamic alignment module is used for carrying out dynamic alignment treatment on the effluent quality data of each treatment unit according to the actual hydraulic retention time of each process section treatment unit; and after training the water quality prediction model, performing water quality prediction based on the real-time data, and outputting a water quality prediction result. The spatial features of the data are captured through the GeoMAN model, and the time features of the data are captured through the time sequence model, so that the spatial and time complexity of the water quality data and the process control parameter data is comprehensively understood, and the water quality prediction precision is improved. And the HRT dislocation compensation module is used for carrying out time alignment treatment on the effluent quality data of the treatment units in different process sections, so that the accuracy of water quality prediction can be further improved.

The farmland drainage system comprises a hard drainage channel and an ecological purification section, the ecological purification section comprises a frame protection unit and an internal filling unit, a bottom liner layer and a partition layer are arranged in the hard drainage channel to form a filling lattice, and the filling lattice is filled with a first filling matrix and a second filling matrix. The first filling matrix can filter and purify the farmland drainage, intercept pollutants in the farmland drainage, slow down the drainage flow rate and prolong the hydraulic retention time; the second filling matrix is used for planting aquatic plants, inhabitation and reproduction spaces are provided for small animals such as frogs and other microorganisms and planktons, the ecological benefits of an original hard drainage channel are improved, and meanwhile the planted aquatic plants can absorb pollutants in water through root systems and cooperate with the microorganisms to purify water. The invention further provides a farmland hard drainage channel transformation method.

The invention discloses a biological denitrification device and a denitrification method for sewage with a low carbon-nitrogen ratio. The denitrification device comprises a raw water tank, a bioreactor and a secondary sedimentation tank which are connected in sequence, wherein the bioreactor sequentially comprises an anaerobic zone, a swing zone, an anoxic zone and an aerobic zone; the swing area is provided with four stages of reaction tanks which are arranged in a split mode, and the dissolved oxygen concentration and the hydraulic retention time of each stage of reaction tank are adjusted based on the inflow water quality. When the system disclosed by the invention is used for treating sewage with a low carbon-nitrogen ratio, an exogenous carbon source does not need to be added through a specific technological process, so that the operation cost of the system is remarkably reduced, and efficient biological phosphorus removal can be realized while the nitrogen removal efficiency is remarkably improved.

The invention provides a comprehensive control method and equipment for the dosage of a water purification system, a medium and a product, and relates to the technical field of water purification. The method comprises the following steps: acquiring water quality parameters and a hydraulic model corresponding to sewage, and predicting target water quality parameters and hydraulic retention time corresponding to an inlet and an outlet corresponding to a magnetic coagulation module according to the water quality parameters and the hydraulic model; generating an agent adding reference curve and an agent adding correction curve according to the target water quality parameters and preset indexes, wherein the preset indexes comprise a discharge index and a standard index; and controlling the dosing amount of the dosing pump according to the chemical dosing reference curve, the chemical dosing correction curve and the water quality parameters. According to the embodiment of the invention, the dosage can be automatically adjusted according to actual water quality parameters, effective matching of the dosage and the phosphorus content of the sewage is realized, medicament consumption is reduced, the labor cost and medicament cost required by sewage purification are reduced, and the demand of accurately controlling the dosage is effectively met.

The present invention relates to the field of urban sewage treatment, and particularly relates to an urban sewage carbon-nitrogen-phosphorus synergistic deep treatment method based on a biological manganese oxide. The method comprises: S1, configuring an upward flow denitrification filter tank; S2, a starting stage, involving: taking a mixed solution of a secondary effluent and a secondary influent of an actual urban sewage treatment plant and manganese sulfate as the influent of the denitrification filter tank, with the manganese concentration being 3.0 mg / L, inoculating hydrolytic acidification bacteria, denitrifying bacteria, anaerobic ammonium oxidation bacteria and manganese oxidation bacteria into the denitrification filter tank, and gradually increasing the ratio value of the secondary influent to the secondary effluent in the mixed solution to 3%; and S3, a stable stage, involving: taking a mixed solution of the secondary effluent and the secondary influent of the actual urban sewage treatment plant and manganese sulfate as the influent of the denitrification filter tank, wherein the manganese concentration is 3.0 mg / L, the hydraulic retention time is 3-4 hours, and the backwashing period is 9-11 days. The present invention can synchronously and efficiently remove carbon, nitrogen and phosphorus from the secondary effluent of an actual urban sewage treatment plant at a low cost.

The invention relates to the technical field of water supply control, and discloses an intelligent quality-based pressure-superposed non-negative pressure water supply control system and method, and the system comprises a data collection control module, a volume identification module, a water age observation module, a mixing decision module, and an impedance verification module. The effective volume parameters of the steady flow compensation tank are inversed through the pressure response characteristics of the variable frequency booster pump set in the starting stage; dynamically calculating the hydraulic retention time in the tank based on the system flow and the effective volume; when the residence time exceeds a safety threshold value, a forced mixing strategy is generated, and municipal inlet water is driven to be mixed with residence water by adjusting the opening degree of a bypass electric adjusting valve and controlling a pump set to operate; and meanwhile, verifying the effectiveness of the mechanical action of the valve according to the deviation between the real-time power and the theoretical reference power of the pump set after the regulation instruction is issued. Volume parameters can be corrected in real time, aged water is actively replaced under the low-flow working condition, closed-loop verification is carried out on faults of an executing mechanism, and the water supply quality and the system reliability are guaranteed.

The invention relates to a method for calculating, regulating and controlling the chlorine addition amount of a waterworks, and belongs to the technical field of water treatment. Firstly, a mathematical model of chlorine demand under different water quality parameters is established according to regression analysis of mass data obtained by a beaker experiment; fitting a residual chlorine attenuation curve; calculating the hydraulic retention time of the water body in the clean water tank and the hydraulic retention time T required by the raw water after chlorination to the outlet of the water plant; calculating the residual chlorine consumption of the raw water in the hydraulic retention time T by using the obtained residual chlorine attenuation curve; calculating the chlorine demand according to a mathematical model of the chlorine demand obtained according to the current water quality index; the chlorination amount is calculated through a chlorination amount calculation formula; and the residual chlorine in factory water is detected in real time, early warning is carried out in time when abnormity occurs, and the chlorine adding amount is adjusted in real time. The chlorine adding amount can be accurately calculated, meanwhile, the chlorine adding amount can be adjusted in real time according to the water quality change, the hydraulic retention time of the clean water tank and the residual chlorine content condition, the operation cost can be reduced, and the energy-saving and environment-friendly effects are achieved.

The invention relates to the technical field of industrial production wastewater treatment, and particularly discloses a treatment method of POSM production wastewater. The treatment method provided by the invention specifically comprises the following steps: carrying out pretreatment to convert heavy metal ions into precipitates, and carrying out mild oxidation on ultra-filtered clear liquid; carrying out wet catalytic oxidation; electrolytic oxidation is carried out under the condition that the current density is 1-10 A / dm < 2 >, and the hydraulic retention time is 10-60 min; the microcrystal material is filled through targeted adsorption, the liquid overflowing speed is 0.2-1 BV / H, and the adsorption temperature is 20-35 DEG C; the wastewater enters an MVR forced circulation system for evaporation, is sent to a forced circulation heat exchanger by a crystallization separator through a forced circulation pump and then returns to the crystallization separator; and performing pyrolysis coupling. The POSM wastewater is treated by adopting the scheme, mother liquor is not left, effluent COD (Chemical Oxygen Demand) is low and stable, condensate water and salt resources can be recycled, resource reutilization is realized, and the treatment cost is reduced.

The invention relates to a method for enriching anaerobic ammonium oxidation bacteria under combined regulation and control of NLR and HRT in the technical field of biological sewage treatment, and aims to solve the problems that the anaerobic ammonium oxidation bacteria are greatly influenced by the environment and are slowly enriched, NH4 < + >-N and NO2 <->-N with low matrix concentration are pumped into an SBR (Sequencing Batch Reactor); and the enrichment of anaerobic ammonium oxidation bacteria is successfully realized by continuously changing hydraulic retention time and water inlet matrix concentration. The total nitrogen removal rate is stabilized at 75%, the removal efficiency is good, the reactor can be flexibly regulated and controlled, rapid starting of the anaerobic ammonia oxidation reactor is facilitated, and a theoretical reference is provided for practical application of the Anammox process. The system is simple to operate, convenient to operate and manage and high in treatment efficiency, and has a good popularization and application prospect.

The invention discloses a preparation method and application of a nano-modified micro-electrolysis filler based on a self-regeneration technology, and belongs to the technical field of water pollution treatment. The method comprises the steps of iron-carbon matrix pretreatment, nano material loading, self-regeneration functional layer coating, filler forming, high-temperature activation and the like, it is ensured that the filler has efficient and stable reaction performance, the filler is filled according to the volume ratio of 30%, the hydraulic retention time is controlled to be 2-4 h, the removal rates of COD, ammonia nitrogen, total phosphorus and heavy metal ions can reach 90%, 85%, 80% and 95% or above respectively, and the method is suitable for industrial production. In the running process of the filler, a weak acid solution with the pH value of 5 is introduced every 30 days, and the self-regeneration function is activated. By optimizing the material modification and self-regeneration mechanism, the problems that a traditional micro-electrolysis filler is prone to passivation, high in decontamination capability attenuation speed and high in maintenance cost are solved, and the micro-electrolysis filler is suitable for lake entrance ecological interception engineering under the complex water quality condition and has the advantages of being efficient, stable and environmentally friendly.

The invention provides a sewage enhanced nitrogen and phosphorus removal process based on microbial community interaction, and belongs to the field of sewage treatment. The method comprises the steps of sewage pretreatment, anaerobic phosphorus release, anoxic denitrification, aerobic nitrification phosphorus uptake and the like, an anaerobic-anoxic-aerobic three-section reactor is adopted, and proper ecological nichs are provided for phosphorus-accumulating bacteria, denitrifying bacteria and nitrifying bacteria by accurately regulating and controlling parameters such as dissolved oxygen, hydraulic retention time and carbon nitrogen ratio of each section, so that the phosphorus-accumulating bacteria, the denitrifying bacteria and the nitrifying bacteria can be efficiently degraded, and the phosphorus-accumulating bacteria, the denitrifying bacteria and the nitrifying bacteria can be efficiently degraded. The competition problem of biological nitrogen removal and biological phosphorus removal is effectively relieved, the nitrogen and phosphorus removal efficiency is remarkably improved, the total nitrogen removal rate reaches 85% or above, and the total phosphorus removal rate exceeds 90%; straw-based modified charcoal is adopted as a carrier, so that the loading capacity and activity of functional flora are improved, and flora interaction is enhanced; meanwhile, resource utilization of agricultural wastes is realized, and the method has remarkable environmental benefits and economic advantages.

The invention discloses a method for in-situ enrichment of anaerobic ammonia oxidizing bacteria, a bio-membrane reactor is adopted, and a carrier of a bio-membrane is made of a material with good conductivity and biological affinity; the direct-current power supply continuously outputs weak voltage below 1.0 V; preparing special wastewater as inlet water of the reactor; sludge containing anaerobic ammonium oxidation bacteria is selected as inoculation sludge, the hydraulic retention time of the reactor is controlled, microorganisms in the reactor mainly grow on a carrier in an attached mode to form a biological membrane, and suspended sludge is eliminated as much as possible; aeration is performed on the reactor, and water enters and exits the reactor continuously. According to the method, the anaerobic ammonium oxidation bacteria are enriched under the micro-aerobic condition, the nitrogen source is only ammonia nitrogen, nitrite nitrogen is generated in the ammonia nitrogen conversion process instead of being supplied externally, the normal form of anaerobic ammonium oxidation enrichment culture is innovated through the method, and the anaerobic ammonium oxidation enrichment culture efficiency is improved. The problem that anaerobic ammonia oxidizing bacteria cannot be enriched due to lack of external supply of nitrite nitrogen in the actual wastewater treatment process is effectively solved.

The invention discloses an efficient three-grid septic tank treatment device based on partial nitrosation and a feces treatment method. The treatment device comprises a stabilizing chamber, an anaerobic chamber, a partial nitrosation chamber and a settling chamber which are sequentially connected, a feeding pipeline is arranged at the upper part of the stabilizing chamber, a septic tank cover plate is arranged at a top opening, a preformed hole is formed in the septic tank cover plate, and the stabilizing chamber is communicated with the anaerobic chamber through a middle pipeline passage; a fixed polyurethane sponge filler is arranged in the anaerobic chamber, another septic tank cover plate is arranged at a top opening, and the upper part of the anaerobic chamber is communicated with the partial nitrosation chamber through a pipeline passage; another septic tank cover plate is arranged at the top of the partial nitrosation chamber, an aeration system is arranged in the septic tank cover plate, and a movable spherical filler is filled in the septic tank cover plate; the bottom of the partial nitrosation chamber is communicated with the settling chamber through a middle passage; a sediment sludge storage hopper is arranged at the bottom of the sediment chamber; a liquid outlet is formed in the upper part of the sediment chamber. The treatment efficiency and the manure utilization rate are remarkably improved, and the hydraulic retention time is shortened.

The invention provides a method for rapidly recovering denitrification efficiency of an anaerobic ammonium oxidation system, and aims to solve the problem of insufficient activity of anaerobic ammonium oxidation bacteria in a limited reactor. The lateral flow high-activity anaerobic ammonium oxidation bacteria are introduced, 5-6 mg / L of Fe < 3 + > is added into the inlet water, and meanwhile, the hydraulic retention time is adjusted, so that the adaptability and denitrification rate of the anaerobic ammonium oxidation bacteria are remarkably improved. Experiments show that the method increases the denitrification rate from 40mg N / L / d to 160mg N / L / d, and the amplification reaches 300%. Besides, hollow plastic small balls with the diameter of 16mm are laid in the reactor, so that a strict anaerobic environment is ensured, and the activity recovery of anaerobic ammonium oxidation bacteria is facilitated. The Fe < 3 + > optimizes the growth environment of microorganisms, enhances the flora stability and the denitrification efficiency, inhibits the competition of harmful microorganisms, and is simple to operate and environment-friendly. The overall efficiency of the sewage treatment system is greatly improved, the energy consumption and the sludge yield are reduced, the denitrification cost is reduced, and the system is suitable for various sewage treatment scenes with efficient denitrification requirements.

The invention discloses a variable-volume CSTR anaerobic fermentation tank which comprises a fermentation tank body, the fermentation tank body is composed of a top cover and a tank body, the bottom of the tank body is connected with a tank foundation, and the interior of the tank body is divided into a jacking area at the bottom and a fermentation area at the top by a middle sealing layer; a plurality of jacking units controlled by a controller to stretch out and draw back are arranged at the bottom of the middle sealing layer, and the jacking units can drive the middle sealing layer to ascend and descend, so that the volume of the fermentation area is changed. The volume of a fermentation area in the fermentation tank body can be changed along with the fluctuation of the feeding amount through the lifting of the jacking unit, so that the hydraulic retention time in the tank tends to be stable, and the fermentation effect is ensured; and the submersible stirrer and the shell breaking stirrer are used for breaking shells, so that the fermentation reaction is not influenced, the fermentation effect and the biogas yield are improved under the condition of saving energy consumption, and the fermentation effect is further ensured.

The high-concentration degradation-resistant wastewater treatment system comprises a hydrolysis acidification tank, an anaerobic reactor, an intermediate water tank, an aerobic granular sludge reaction tank and an MBR (membrane bioreactor) which are sequentially communicated in the wastewater flow direction, part of effluent of the anaerobic reactor flows back to the hydrolysis acidification tank for retreatment, and the rest of the effluent enters the intermediate water tank; the effluent of the middle water tank respectively enters an aerobic granular sludge reaction tank for decarbonization, denitrification and dephosphorization treatment and enters an MBR (Membrane Bioreactor) to make up the demand of denitrification on a carbon source; through coupling linkage and synergistic effect of the hydrolytic acidification reaction tank, the anaerobic reactor, the aerobic granular sludge reaction tank and the MBR bio-membrane reactor, the effluent concentration is controlled. A hydrolysis acidification pool and an anaerobic reactor are combined for internal circulation of a water outlet part, impact of high concentration on the anaerobic reactor is reduced, biogas produced by the anaerobic reactor is used for power generation, energy recovery and energy consumption saving, the purposes of energy conservation and emission reduction are achieved, and the problems that an existing treatment device and technology are tedious in process, long in hydraulic retention time and low in cost are solved. And meanwhile, the treatment effect is improved.

The utility model discloses an automatic wetland water purification system. The system comprises a wetland planting area, plant communities used for purifying water quality are planted in the wetland planting area, gates are arranged on the edge of the wetland planting area and comprise an inlet gate and an outlet gate, and gate signal ports are arranged in the inlet gate and the outlet gate and used for receiving control information and adjusting opening and closing of the gates. Therefore, the water inlet amount and the water outlet amount entering the wetland planting area are respectively controlled; a water level sensor which is vertically arranged is arranged in the wetland planting area, and a water level signal port is arranged in the water level sensor and used for transmitting the measured water level data of the wetland planting area out; the water purification system further comprises a microprocessor and a battery device. The device can automatically supply power and operate automatically, automatically regulate and control the opening and closing of the gate, control the hydraulic retention time of domestic sewage or farmland drainage, and realize removal of nitrogen and phosphorus nutritive salts in water pollutants.

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 invention discloses a sewage advanced treatment and activated carbon regeneration method. The method comprises the following steps: (1) filling activated carbon according to 30-70% of the effective volume of a reactor; (2) carrying out wall breaking treatment on the residual activated sludge, releasing substances in cells, precipitating or filtering to remove impurities, keeping the liquid on the upper surface, adding the liquid into the reactor in the step (1), carrying out braising exposure treatment for 12-24 hours, and controlling the concentration of dissolved oxygen to be more than 5mg / L; (3) adding a nitrogen and phosphorus removal bacterial agent into a reaction system in the step (2), carrying out continuous aeration treatment, and then carrying out sewage treatment according to set hydraulic retention time; in the sewage treatment process, regular rotational flow treatment is performed on the activated carbon to regenerate the activated carbon. According to the method disclosed by the invention, dynamic biological regeneration of the activated carbon part can be realized, the service cycle of the activated carbon is further prolonged, and synchronous deep removal of organic pollutants and nitrogen-containing pollutants is realized.

The invention discloses a method for hydrolyzing dimethylformamide and recovering dimethylamine, which comprises the following steps: mixing dimethylformamide wastewater with alkali liquor, and adjusting the pH value of the wastewater to 11.5-12 to obtain adjusted wastewater; heating the adjusted wastewater to 70-80 DEG C, and carrying out hydrolysis reaction to obtain hydrolyzed wastewater, wherein the hydraulic retention time is 3-4 hours; carrying out steam stripping deamination on the hydrolyzed wastewater to obtain steam containing dimethylamine and deaminated wastewater; the steam containing dimethylamine is subjected to condensation and gas-liquid separation, gas-phase dimethylamine and condensate are obtained, and the condensate flows back to the steam stripping amine removal step; the gas-phase dimethylamine is absorbed by a low-temperature absorption liquid to obtain a dimethylamine aqueous solution product, and tail gas generated in the absorption process is purified. According to the method, the residual concentration of DMF can be reduced to be extremely low (1t: 15 mg / L), the biotoxicity is effectively relieved, and good conditions are created for subsequent anaerobic and aerobic biochemical treatment of wastewater.

This invention discloses a startup method for an AnDMBR dynamic membrane for sludge anaerobic digestion. During the startup phase, by adjusting the solids retention time, hydraulic retention time, biogas circulation intensity, and membrane flux in the membrane zone, the sludge operating concentration is rapidly increased and the dynamic membrane layer is rapidly formed, so that the transmembrane pressure difference in the membrane zone reaches the expected value in a short time, thereby improving the production efficiency of the reactor.