31 results about "Hydraulic retention time" patented technology

This invention discloses a gate-controlled canal system and method for simulating the transport process of new pollutants, comprising an experimental chamber, a multi-stage gate control unit, and an environmental control and monitoring unit. The experimental chamber has multiple fixed partitions inside, forming water flow channels between adjacent partitions, allowing experimental water to circulate repeatedly along these channels. The multi-stage gate control unit includes multiple adjustable flow gates located inside the experimental chamber, dividing the water flow channels into multiple study zones. The environmental control and monitoring unit includes an automatic controller, a hydrodynamic propulsion device, a temperature control device, an aeration device, a lighting device, and an online water quality monitoring device. This invention achieves accurate simulation of the core characteristics of gate-controlled canals, such as multi-stage gate regulation, stepped water levels, and variable hydraulic residence time, providing a key experimental means for studying the migration and transformation behavior of new pollutants under complex hydraulic conditions.

This invention discloses an application device and method for high-efficiency, anti-fouling MBR membrane modules in wastewater treatment. The MBR tank of this device employs special materials and structural design, resulting in a reasonable hydraulic retention time. The MBR membrane module is made of modified PVDF, with precisely controlled membrane pore size and reinforced ribs and a unique encapsulation structure. Combined with an aeration device featuring a central aeration nozzle, it effectively solves problems such as membrane breakage, entanglement, and aeration dead zones. It is also equipped with comprehensive supporting equipment, and automated operation and precise control are achieved through an online monitoring and control system. The application method covers steps including biological wastewater treatment, membrane filtration, air scrubbing, backwashing, and chemical cleaning, and maintenance and optimization are performed based on water quality and equipment conditions. This invention significantly improves wastewater treatment efficiency and water quality stability, reduces membrane fouling and operating costs, extends membrane module lifespan, is highly adaptable, and offers intelligent and simple operation, providing an innovative and efficient solution for wastewater treatment.

The present invention relates to the field of treatment of wastewater from express highway service areas, and in particular relates to a method for treating wastewater from express highway service areas based on anammox-enhanced AOOA-MBBR. The method comprises: step I, preparing a reactor; step II, starting up the reactor and inoculating bacteria, in which step, the hydraulic retention time is gradually shortened to 20 h after an effluent stably runs for a preset time; step III, anammox enhancement, involving: after the effluent stably runs for the preset time, respectively replacing some of a filler in each tank with a filler carrying a biofilm of anammox bacteria, wherein the dissolved oxygen concentration of a first aerobic tank is 0.2 mg / L, and the dissolved oxygen concentration of a second aerobic tank is 0.5-0.8 mg / L, adding manganese sulfate to some of the wastewater from express highway service areas, and then directly pumping the resulting mixture into a second anoxic tank; and step IV, after the effluent is stable, entering a stable stage. By means of the present invention, the total nitrogen and total phosphorus of the effluent can meet corresponding discharge standards at a hydraulic retention time of 20 h, thereby improving the treatment efficiency of wastewater from express highway service areas and avoiding the problem of subsequent phosphorus removal being troublesome.

This invention provides a nitrogen and phosphorus wastewater treatment system and method. The system includes a pre-anoxic tank, an inclined plate sedimentation tank, an anaerobic tank, an anoxic tank, a homogenization reaction tank, a synergistic oxidation tank, and a storage tank. The storage tank is connected to the homogenization reaction tank via a material transport pipeline, and the homogenization reaction tank is equipped with a stirring group. The storage tank contains a carbon-based composite material with a surface loaded with manganese oxides and magnesium oxides. The carbon-based composite material is added to the homogenization reaction tank through the material transport pipeline, and stirring ensures uniform mixing of the material and the mixed liquid, achieving homogenization and adhesion, and enhancing the subsequent synergistic oxidation effect. The carbon-based composite material provides a reaction interface for microorganisms, organic matter, and sludge, increasing microbial diversity and enabling synergistic oxidation with microorganisms to improve the degradation efficiency of nitrogen and phosphorus pollutants. This invention has a simple structure, does not require continuous aerobic aeration, and has advantages such as small footprint, short hydraulic retention time, low operating energy consumption, continuous influent and effluent, and high nitrogen and phosphorus pollutant removal efficiency.

This invention relates to a method for the simultaneous capture of carbon and phosphorus in wastewater. It addresses the problems of high aeration energy consumption, long hydraulic retention time, low phosphorus removal rate, and high carbon, ammonia, and phosphorus levels in existing wastewater treatment processes. The method utilizes the aerobic phosphorus absorption characteristics of microorganisms, employing tightly bound EPS (extracellular polymeric substances) to rapidly store and release phosphorus, capturing it in the sludge phase. This simultaneously and rapidly reduces COD and total phosphorus in the wastewater to low levels, achieving a COD removal rate of over 70%. Furthermore, the proportion of carbon captured and converted into the sludge phase reaches 30%–37%, while the proportion of organic matter oxidized to CO2 is only 22%–31%, resulting in an effective phosphorus capture rate of 70%–75%, achieving highly efficient capture and removal of both phosphorus and organic matter. Simultaneously, for effluent treatment with irrigation potential, the method achieves phosphorus capture ratio control based on efficient carbon capture, thereby obtaining effluent with low COD concentration and dynamically adjustable nitrogen-to-phosphorus ratio to meet target irrigation needs.

The present application relates to the field of water pollution control and treatment, in particular to an ecological filter rural water purification system, which comprises a data acquisition module, an optimal state feedback module, a dynamic modeling module and an optimal control parameter output module. The data acquisition module collects water quality parameters through multiple sensors, generates water quality time series data through synchronization, anomaly identification and distortion data reconstruction, and simultaneously collects and standardizes structural parameters; the optimal state feedback module obtains relevant indexes based on the fuzzy PID algorithm, and then outputs them through firefly algorithm optimization; the dynamic modeling module respectively constructs ammonia nitrogen degradation models in the aerobic zone and COD degradation models in the anaerobic zone, correlates the two zones by hydraulic retention time, and incorporates environmental disturbance correction models; the optimal control parameter output module outputs control parameter intervals through a decision tree, and particle swarm optimization algorithm is used to search for optimal parameters in the intervals and output them; the system can efficiently purify rural water sources and provide precise control basis for the water purification process.

The application relates to the technical field of water filtration, in particular to a module filtration direct drinking water control method, which is applied to a direct drinking water equipment containing a pretreatment unit, a front-end high-pressure pump, a filtration module, a pressure tank and a water supply pipeline. Data are collected in real time through a water production side pressure sensor and a flowmeter, constant pressure water supply is implemented with a first target pressure and a second target pressure at peak and off-peak periods respectively, a maximum safe flow that can be dynamically updated is set, the high-pressure pump output is limited and pressure tank pressure compensation water supply is switched when the instantaneous flow exceeds the limit, the pressure tank water storage is preferentially consumed when the off-peak demand is lower than the threshold value, the high-pressure pump is started again when the water quantity is lower than the lower limit, a pipe network hydraulic residence time model is established, a backflow electric valve and a sterilization device are opened when the residence exceeds the threshold value, the microbial risk is reduced, and the water supply stability is improved.

This invention relates to the field of wastewater treatment technology, and particularly to a microbial electrochemical device and method for treating aquaculture wastewater. The device includes a central hydrolysis zone, an annular anode cavity, and an annular cathode pool arranged coaxially from the inside out; the anode and cathode cavities are separated by a composite functional sidewall composed of a conductive anode layer, a sealing isolation layer, and a proton exchange layer; the cathode pool contains a transparent conductive cathode electrode carrying a photocatalyst, forming a closed electrochemical circuit with the conductive anode layer; the overflow weir at the top of the hydrolysis zone is lower than the overflow outlet of the anode cavity, achieving gravity flow without power. This invention solves the shortcomings of traditional microbial electrochemical systems—low degradation efficiency of macromolecular organic matter and inability to simultaneously remove nitrogen and phosphorus—through a three-stage coupling of hydrolysis pretreatment—microbial electrochemical degradation—and synergistic purification by microalgae and photocatalysis. It reduces hydraulic retention time by more than 50% and increases nitrogen and phosphorus removal rates by more than 15%, achieving synergistic efficiency in wastewater purification and electrochemical generation.

The application discloses a lake water quality change forecasting and early warning method based on a complex relationship between lake flow and water quality. The method obtains multi-source monitoring data of a lake area, calculates a lake flow comprehensive characteristic index containing flow velocity, vorticity and hydraulic retention time, constructs a conventional early warning path, identifies the optimal time lag of the lake flow and the water quality, adopts a physical constraint kernel regression with transport and retention constraints to construct a response model, and determines a dynamic early warning threshold that changes with the lake flow condition. A mutation early warning path is constructed, a critical slowing down index of the water quality sequence is calculated, a spatial propagation weight is constructed based on the flow direction of the flow field, and an early warning index with enhanced early warning is synthesized by superimposing the upstream signal on the downstream. The early warning levels of the two paths are fused and decided. The application solves the problems of data model violation of physical laws and single-point early warning lag, and realizes early warning of gradual and sudden water quality risks.

This invention discloses an integrated biological trickling filtration ammonia removal method and apparatus, comprising the following steps: S1: Inoculating the biological trickling filter layer with aerobic activated sludge and the ammonia nitrogen conversion layer with anaerobic ammonia oxidation granular sludge, and cultivating them using a circulating biofilm method; S2: Introducing ammonia-containing waste gas, periodically replacing the circulating liquid and adding nutrients; S3: Stopping the replacement of the circulating liquid and instead periodically replenishing with fresh nutrient solution; S4: Reducing the inlet ammonia concentration, completing the acclimatization; S5: Stable operation of synergistic denitrification: closing the leachate discharge hole, allowing the leachate flowing out of the biological trickling filter layer to flow by gravity into the ammonia nitrogen conversion layer, controlling the hydraulic retention time and effluent recirculation ratio of the ammonia nitrogen conversion layer to achieve integrated synergistic denitrification. This application achieves deep denitrification, completely solving secondary pollution. Through the built-in anaerobic ammonia oxidation unit, the total nitrogen removal rate reaches over 90%, avoiding secondary pollution of nitrogen-containing wastewater.

This invention discloses an iron-based composite solid-phase carbon source for denitrification of wastewater with a low carbon-to-nitrogen ratio and its preparation method. This invention relates to the field of wastewater treatment technology and aims to solve the problem that traditional mixed solid-phase carbon sources suffer from unstable carbon release rates under fluctuations in hydraulic retention time / hydraulic load, easily leading to a sharp drop in denitrification efficiency. The method involves co-dissolving polyvinyl alcohol and sodium alginate to form a cross-linking carrier solution; mixing zero-valent iron powder, PHBV powder, and natural cellulose powder and adding them to the carrier solution to form a homogeneous slurry; freezing the slurry and then solidifying it in an acidic cross-linking solution containing calcium ions; followed by washing and vacuum drying to obtain the iron-based composite solid-phase carbon source. The carbon source obtained by this invention has the characteristics of stable carbon release, high denitrification efficiency, and strong resistance to fluctuations in hydraulic load, making it particularly suitable for deep denitrification treatment of wastewater with a low carbon-to-nitrogen ratio.

The application discloses a method for controlling disinfection by-products and biological toxicity of sewage based on a denitrification process and application in the technical field of sewage treatment, and aims at the problems that toxic disinfection by-products DBPs are easily generated and the biological toxicity of effluent is increased after the sewage is disinfected by adding chlorine. The carbon-nitrogen ratio, the hydraulic retention time and the temperature in the deep denitrification process are optimized in cooperation, the optimal coupling relationship between the temperature and the hydraulic retention time is explored, the regulation and control path of "process parameters-precursor-DBPs-toxicity" is established, the source control of DBPs is realized, and the biological toxicity of effluent is reduced. The application starts from the optimization of operation parameters in the sewage treatment process, does not need to add chemical agents or add complex equipment, can significantly reduce the ecological risk of the subsequent disinfection link while ensuring the denitrification effect, is simple to operate, low in cost, and suitable for the process optimization and upgrading of the existing sewage treatment plant.

This invention discloses a biological denitrification device and method for wastewater with a low carbon-to-nitrogen ratio. The denitrification device includes a raw water tank, a bioreactor, and a secondary sedimentation tank connected in sequence. The bioreactor sequentially includes an anaerobic zone, a swaying zone, an anoxic zone, and an aerobic zone. The swaying zone has four separate reaction tanks, with the dissolved oxygen concentration and hydraulic retention time of each tank adjusted based on the influent water quality. When treating wastewater with a low carbon-to-nitrogen ratio, this system achieves the elimination of the need for external carbon sources through a specific process, significantly reducing system operating costs. Furthermore, it significantly improves denitrification efficiency while also achieving highly efficient biological phosphorus removal.

The present application relates to the technical field of water treatment, and discloses a chemical flocculation process for deep phosphorus removal of phosphorus-containing wastewater, which comprises the following steps: synchronously feeding the phosphorus-containing wastewater and a polyaluminum chloride solution into a high-frequency shearing reaction zone, adjusting the shearing rate and the hydraulic retention time, adding hydrogen ions according to the alkalinity of the wastewater to maintain the pH at 4.5-5.5, so as to form a multi-core hydroxyl complex; introducing the fluid into a secondary reaction zone, inducing the pH transition and homogeneous nucleation by jetting an alkaline regulator, and using the generated primary microflocs to capture phosphate to form a phosphorus-rich complex; and separating and collecting the precipitate. The present application changes the phosphorus removal mechanism from physical entrapment to chemical coordination bonding by interfering with the hydrolysis path of aluminum salt, simultaneously improves the phosphorus grade of the precipitate during deep phosphorus removal, and makes the precipitate have the secondary mineral resource recovery value, so as to achieve the resource comprehensive utilization of the wastewater treatment process.

This invention relates to the field of water treatment technology and discloses an intermittent electrocatalytic treatment method for trace estrogen in reclaimed water. The method is carried out in a three-dimensional electrode reactor. Before formal treatment, a pre-treated water sample containing the estrogen to be removed is used to pre-saturate the particle electrode. Subsequently, reclaimed water containing one or more estrogenic pollutants is continuously introduced into the reactor, operating at a current density of 1.0–10.0 mA / cm², a hydraulic retention time of 5–20 min, and an aeration rate of 0–3.0 L / min. An intermittent power supply mode with alternating power on and off is employed, wherein the ratio of power on time to power off time is 1:1, and the power off time is 2–120 s. During the power off phase, the estrogen to be removed accumulates on the surface of the particle electrode. During the power on phase, the particle electrode repolarizes to form a micro-battery and undergoes electrochemical oxidation in conjunction with the anode, causing direct oxidation and / or indirect oxidation mediated by an electrogenerated oxidant, while the particle electrode achieves in-situ regeneration. The method is applicable to the treatment of trace amounts of estrogens in reclaimed water, preferably one or more of estrone (E1), 17β-estradiol (E2), estriol (E3), 17α-ethinylestradiol (EE2), and bisphenol A (BPA). This invention can reduce the artificially inflated impact of adsorption on the evaluation of treatment effectiveness, and reduce energy consumption while ensuring treatment efficiency.

This invention relates to the field of wastewater treatment technology and discloses an integrated biological water treatment device. This integrated biological water treatment device includes a tank, an inlet pipe, an outlet pipe, an anoxic zone, an aerobic zone, a sedimentation zone, and a graded treatment unit. By setting vertical baffles and horizontal deflectors alternately, this integrated biological water treatment device forces wastewater to make multiple turns in both the horizontal and vertical directions, extending the actual flow path of the wastewater within the limited volume of the tank and increasing the hydraulic retention time. Simultaneously, guide cones are arranged at the bottom of the tank between adjacent vertical baffles. When water flows through the gaps at the bottom of the vertical baffles, it impacts the inclined surface of the guide cones, generating upward and lateral water flow components. This carries the sludge deposited at the bottom of the tank upwards and laterally, eliminating the dead flow zone at the bottom and extending the contact time between the wastewater and microorganisms, thus reducing sludge accumulation at the bottom of the tank.

This invention relates to the field of wastewater treatment technology, and more particularly to an intelligent dosing control system and method for wastewater treatment plants. The system includes a multi-level water quality monitoring unit, a data processing unit, a dynamic water quality prediction unit, a strategy generation unit, and an execution unit. The method includes: real-time acquisition of influent, process point, and effluent water quality and flow data; data cleaning, time alignment based on hydraulic retention time, and feature engineering processing to construct a multi-dimensional feature vector; inputting the feature vector into a memory network model to predict future effluent water quality; the strategy generation unit generating a feedforward control quantity based on the deviation between the predicted value and the set value, and generating a feedback control quantity based on the deviation between the actual effluent value and the set value to generate the optimal dosing command; and the execution unit adjusting the dosing amount according to the command. This invention achieves advanced prediction and precise control of effluent water quality, significantly reducing chemical consumption and improving effluent compliance rates.

This invention discloses a seasonal adaptive wastewater treatment system based on multi-mode spatial reconstruction and feedforward-feedback control, relating to the field of biological wastewater treatment ponds. It aims to solve the technical problems of traditional fixed-volume pond designs being unable to adapt to significant fluctuations in water quality and quantity between winter and summer, and the poor resistance to short-term shocks due to the lag in traditional control systems. The technical solution involves setting up a bidirectional adjustable zone between conventional anaerobic, anoxic, and aerobic ponds. By changing the volumes of the anaerobic, anoxic, and aerobic zones, the spatiotemporal reconstruction of the hydraulic retention time can be achieved seasonally. Simultaneously, a feedforward-feedback control system is constructed. By monitoring influent temperature, flow rate, and influent and effluent water quality in real time, the aeration rate of the biological pond and the internal and external reflux ratio are dynamically adjusted to rationally redistribute the limited carbon sources in the wastewater, improving the system's ability to cope with short-term high-load water treatment and ensuring the synergistic nitrogen and phosphorus removal effect of biological treatment.

The application provides a circulating water breeding endogenous carbon denitrification method and system with denitrification as the core, and belongs to the technical field of water treatment in circulating water breeding. The innovation is that the system core is changed from nitrification to denitrification, the independent solid-liquid separation equipment is cancelled, the biological filler in the anoxic denitrification unit is used to realize the physical interception, in-situ hydrolysis fermentation and denitrification of suspended organic matter at the same time, the organic matter in the breeding tail water is used as the endogenous carbon source to drive denitrification, and the denitrification does not depend on the addition of exogenous carbon source. The ammonia nitrogen is converted into nitrate nitrogen and / or nitrite nitrogen as the electron acceptor in the nitrification area, which is closely coupled with denitrification, and the accumulation of nitrate is avoided from the source. By detecting the water quality parameters of the effluent of the anoxic denitrification unit, the influent flow is adjusted according to the hierarchical control logic, so that the hydraulic retention time is matched with the biochemical treatment load. The system can adapt to various biochemical treatment architecture modes according to the breeding varieties and load, and the water exchange rate can be greatly reduced, and the system is especially suitable for the seawater and land breeding scene.

The application discloses a water purifying device for stone coal deslagging wastewater treatment, and relates to the technical field of stone coal deslagging wastewater treatment. The existing device has the problems of poor sedimentation effect caused by flow disturbance when flocculation and sedimentation are simultaneously performed, high requirements for the volume of a sedimentation tank and reaction time, and high construction cost. The application simultaneously performs flocculation and sedimentation, reduces the residence time of intermediate links and material transfer processes, accelerates the overall wastewater treatment rhythm, can treat more sewage in unit time, optimizes the hydraulic retention time of the whole treatment process, can reduce the required tank volume for treating the same amount of sewage, and the smaller sedimentation tank not only reduces the capital investment, but also is provided with a special sedimentation flow channel, so that the influence of water flow turbulence caused by flocculation on sedimentation can be minimized, and the particle suspension and back mixing caused by turbulence can be reduced.

The present application relates to sewage treatment technical field, especially for a kind of biochar-based constructed wetland and for nitrogen and phosphorus removal and antibiotic degradation method, including constructed wetland pool, wetland plant and water inlet pipeline and water outlet pipeline;Pool is filled with quartz sand, biochar and gravel three layers of substrate from top to bottom in turn;Wetland plant yellow flag iris is planted in quartz sand layer;Water inlet pipeline is connected with the upper water inlet end of pool body, and water outlet pipeline is connected with the lower water outlet end;When operating, wastewater containing sulfamethoxazole is pumped into pool body by peristaltic pump, and sequentially flows through each substrate layer, and hydraulic retention time is 3~7 days;The present application is designed by the three-layer substrate layer structure of "quartz sand-biochar-gravel", improves the removal rate of sulfamethoxazole and total nitrogen, reduces N2O and CH4 greenhouse gas emissions, and inhibits the generation of toxic degradation products.

The application relates to the technical field of environmental engineering, and particularly discloses a method for strengthening denitrification by anaerobic ammonia oxidation. The method comprises the following steps: adding a zeolite-Fe3O4 composite material to an anaerobic ammonia oxidation reactor, wherein the zeolite-Fe3O4 composite material is prepared by a coprecipitation method; inoculating nitrite-type anaerobic ammonia oxidation granular sludge in the anaerobic ammonia oxidation reactor, and taking wastewater containing NH4 + -N and NO2 ‑ -N as influent water; and operating under the conditions of a temperature of 25-30 DEG C, dissolved oxygen <0.2 mg / L, pH 7.5-8.5, and a hydraulic retention time of 3-30 h. The method provided by the application can make the ammonia nitrogen removal rate reach more than 95%, the SAA activity is high, the stability of sludge particles is significantly strengthened, the average particle size of functional bacteria is significantly increased, the abundance of core functional bacteria is greatly improved, and the problems of sludge loss and insufficient bacterial activity are effectively solved.

This utility model discloses a co-treatment device for kitchen waste and sludge, including a raw water tank for mixing the kitchen waste and sludge to form a mixed liquid, an anaerobic tank, a UASB tank, a multi-functional tank, and an internal circulation pipeline. The device independently controls carbon production and methanogenesis, with corresponding anaerobic tanks and UASB tanks. Through this modular and partitioned design, technicians can adjust the hydraulic retention time and pH according to the target to achieve dynamic metabolic balance, avoiding the limitations of a single-target process, and realizing the autonomous adjustment of the metabolic balance between acid-producing bacteria and methanogenic bacteria.

The present application relates to sewage treatment technical field, and disclose intelligent BAF simultaneous nitrification and denitrification phosphorus recovery sewage treatment system and method, the system includes sewage quality parameter processing module, process operation optimization analysis module, resource recovery execution module.The method comprises: collecting sewage influent data and BAF reactor operation data;Carrying out carbon-nitrogen-phosphorus ratio analysis and process state monitoring, judging the feasibility of simultaneous nitrification and denitrification;When the condition is not satisfied, carbon source supplement and dissolved oxygen control are carried out;Optimize the process parameters of hydraulic retention time, filler layer height and reflux ratio;Match chemical precipitation, crystallization and adsorption method as target phosphorus recovery process;Drive dosing, aeration and sludge discharge unit to execute treatment and output purified water and phosphorus recovery product.The present application improves the denitrification efficiency and system stability, improves the phosphorus recovery efficiency and product quality, and ensures the improvement of overall treatment effect and resource recovery rate.

The application is suitable for the technical field of sewage treatment, and provides a livestock breeding sewage sterilization treatment device, which comprises a filter box, a mixed sterilization tank is fixedly connected to the filter box, a coarse filter assembly for impurity coarse filtration is arranged in the filter box, the bottom of the filter box is a buffer water storage tank, a cyclone generation chamber, an ultraviolet catalytic sterilization chamber and an ozone contact reaction chamber are sequentially connected in the mixed sterilization tank, and a gas guide pipe is connected between the ozone contact reaction chamber and the filter box; a pump is arranged in the buffer water storage tank, a liquid guide pipe is connected to the pump, and the cyclone generation chamber has a conical cylinder structure with a large upper part and a small lower part. In the application, the device is designed in a tangential water inlet and a conical cylinder structure of the cyclone generation chamber, so that the instantaneous mixing of the disinfectant and the sewage is strengthened; in cooperation with a detour flow guide assembly in the ultraviolet catalytic sterilization chamber, the hydraulic retention time is effectively prolonged, and the uniformity of ultraviolet irradiation is improved.

This invention discloses a method for degrading municipal solid waste sludge based on interfacial cell disruption and enzyme-mediator co-catalysis, belonging to the field of solid waste treatment and resource utilization technology. Addressing the problems of dense extracellular polymer structures, slow hydrolysis rates, high energy consumption of traditional pretreatment methods, easy secondary pollution, and highly overlapping technical routes in municipal solid waste sludge, this invention employs electro-induced asymmetric plasma interfacial discharge to achieve selective cell disruption of sludge flocs under low-temperature, chemical-oxidant-free, and acid- and alkali-free conditions. Immobilized enzyme-biomimetic redox mediator co-loaded particles simultaneously complete the directional depolymerization of macromolecular organic matter and the construction of electron transport pathways. Furthermore, a pulsed micro-aerobic-anaerobic alternating mode triggered by redox potential in real time intelligently matches the activity of hydrolytic bacteria and methanogenic bacteria, achieving efficient sludge degradation. This invention operates under mild conditions throughout, without secondary pollution, and can significantly improve the soluble organic matter dissolution rate, volatile solids removal rate, and methane yield of sludge, while greatly shortening the hydraulic retention time.

The utility model provides an integrated reaction device of ozone catalytic oxidation ceramic membrane filtration relates to wastewater treatment equipment technical field, include: reactor, the inside of reactor is provided with flat plate ceramic membrane subassembly along vertical direction, flat plate ceramic membrane subassembly divides the reactor into two chambers, and the upper end and the lower end of two chambers are linked, and the reactor is used for filling powder catalyst, gas inlet component and water inlet component, gas inlet component and water inlet component are connected with the lower end of one chamber of reactor through the jet device, water outlet component, water outlet component is connected with flat plate ceramic membrane subassembly, solve the problem that the ozone oxidation and membrane filtration are designed as independent unit in prior art, and the problems such as large floor area, long hydraulic retention time, incomplete oxidation reaction, intensified membrane pollution.

This invention provides a leather degreasing wastewater treatment system, comprising the following functional modules: a data acquisition and preprocessing module, used to simultaneously acquire and preprocess characteristic water quality index data and operating condition data from the demulsification tank inlet; a load demand analysis module, which calculates the demulsification demand index and its rate of change based on water quality data to determine the load trend; a dynamic dosage calculation module, which calculates the dynamic dosage coefficient by comprehensively considering influent temperature, hydraulic retention time, and load trend to determine the target dosage of demulsifier; and an operation mode matching module, which determines the load status based on the demulsification demand index and dynamically matches energy-saving, standard, or enhanced operation modes based on the trend. This invention achieves precise demulsifier dosage and adaptive switching of operation modes by integrating multi-source parameters, solving the problems of lag response and reagent waste in traditional methods, improving demulsification efficiency and operational economy, and reducing the risk of exceeding emission standards.

This invention belongs to the field of wastewater treatment technology, and particularly relates to a purification process for hydrazine-containing industrial wastewater, comprising the following steps: loading cobalt and copper ions onto mesoporous silica, followed by calcination to obtain composite microparticles; dissolving polyethylene glycol hexadecyl ether in an ethanol solution and reacting it with TEOS and VTMS, then adding acrylic acid and an initiator and mixing to obtain an inner coating solution; dissolving poloxamer in an ethanol solution and reacting it with TEOS and VTMS to obtain an outer coating solution; subjecting the composite microparticles to hydroxylation treatment and dispersing them in the inner coating solution for reaction, extraction, dispersing them in the outer coating solution for reaction, extraction, and obtaining a composite catalyst, which is then used in synergistic treatment with hydrogen peroxide solution to treat hydrazine-containing industrial wastewater. This invention maintains high treatment efficiency even as the concentration of unsymmetrical dimethylhydrazine (UDMH) in the wastewater decreases, effectively reducing the concentration of UDMH in the wastewater within a specified hydraulic retention time to meet effluent requirements.

The application discloses a method for quickly starting up anaerobic ammonia oxidation under low-oxygen condition and improving operation efficiency, and comprises the following steps: S1, inoculating anaerobic ammonia oxidation sludge into a reactor; S2, feeding water into the reactor, wherein the water is not subjected to deoxygenation treatment, the ratio of ammonia nitrogen to nitrite nitrogen in the water is (1.5-2.5):1, and the hydraulic retention time is 3-3.9h; S3, operating the reactor until the total nitrogen removal efficiency of the reactor reaches 75% and is kept stable for at least 14 days, and the ammonia nitrogen removal efficiency and the nitrite nitrogen removal efficiency are both maintained above 90%, so that the quick start-up of anaerobic ammonia oxidation under low-oxygen condition is realized; and S4, adjusting the hydraulic retention time to 2-2.9h, and continuing to operate the reactor for no more than 20 days, so that the operation efficiency of the reactor is improved. According to the method, the quick start-up of anaerobic ammonia oxidation under micro-oxygen condition can be successfully realized within 40 days, and the operation efficiency of anaerobic ammonia oxidation can be improved within 20 days, thereby breaking through the limitation of a long start-up period and low operation efficiency of traditional anaerobic ammonia oxidation.