118 results about "Hydraulic retention time" patented technology

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 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 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 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.

The invention discloses a mine water recharge pretreatment device which comprises a supporting plate, the outer side of the top of the supporting plate is sleeved with a shell, one side of the top of the shell is fixedly connected with a supporting frame, one side of the supporting frame is fixedly connected with a box body, and the center axis of the top of the box body is fixedly connected with a first motor; and the output end of the first motor is fixedly connected with a first stirring roller. Through the staged stirring design and the rapid mixing stage, a flocculating agent is in full contact with mine water, charge neutralization is completed, flocs are promoted to collide and agglomerate into large and dense flocs in the slow flocculation stage, the flocs are prevented from being damaged by strong turbulence, and the flocculation effect is improved; secondly, the multi-shell design is matched with switching of the flow guide pipes, materials can be processed in parallel, the hydraulic retention time is flexibly adjusted, and the processing efficiency is improved; water and sediments are separated through a mechanical structure after sedimentation, operation is convenient, the sediments are treated in a centralized mode, the occupied area of the device is small, and the space utilization rate is high.

The invention relates to the technical field of data processing, and discloses a ditch ecological restoration benefit evaluation method and system. The method comprises the following steps: inputting a ditch pollution source tracking data set into a ditch pollution transmission simulation algorithm, and calculating a ditch purification capability coefficient through ditch hydraulic retention time and a pollutant degradation rate to obtain a ditch self-purification efficiency matrix; a ditch bearing capacity comparison model before and after restoration is established according to the ditch self-purification efficiency matrix, the restoration gain proportion is calculated and determined through the ditch containing threshold value difference, and a ditch capacity improvement vector is obtained; and carrying out space coupling operation on the channel capacity improvement vector and a village-in-city building density distribution factor to generate a regional channel restoration contribution index, and obtaining a channel restoration efficiency quantification result. According to the method, the problem that environmental feature pertinence and quantitative analysis means are lacked in village-in-city ditch restoration benefit evaluation is solved, and the accuracy of restoration benefit evaluation is improved.

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 application relates to the field of expressway service area wastewater treatment, and particularly relates to a kind of expressway service area wastewater treatment method based on anaerobic ammonia oxidation enhanced AOOA-MBBR.Method includes: first, preparation reactor;Second, start reactor and inoculate bacteria, in this step, after the preset time of effluent stable operation, hydraulic retention time is gradually shortened to 20h;Third, anaerobic ammonia oxidation enhancement: after the preset time of effluent stable operation, using the packing of biofilm anaerobic ammonia oxidation bacteria replaces part of the packing in each pool;The dissolved oxygen concentration in the first aerobic tank is 0.2mg / L, the dissolved oxygen concentration in the second aerobic tank is 0.5-0.8mg / L;Part of the expressway service area wastewater is directly pumped into the second anoxic tank after adding manganese sulfate;Fourth, after the effluent is stable, enter the stable stage.The present application can make the total nitrogen and total phosphorus of effluent reach the corresponding discharge standard when the hydraulic retention time is 20h, thereby improving the expressway service area wastewater treatment efficiency, and avoiding the subsequent phosphorus removal problem.

The invention discloses an autotrophic and heterotrophic synergistic denitrification method, and relates to the technical field of sewage treatment.The method comprises the steps that an autotrophic denitrifying bacterium and heterotrophic denitrifying bacterium symbiotic micro-ecological environment is built in the same reactor, the autotrophic denitrifying bacterium conducts denitrification with inorganic carbon as a carbon source and a reducing sulfur compound as an electron donor, and the heterotrophic denitrifying bacterium conducts denitrification with the inorganic carbon as a carbon source and the reducing sulfur compound as an electron donor; the heterotrophic denitrifying bacteria perform denitrification by taking an organic carbon source as an electron donor and a carbon source. By controlling the water inlet condition, the dissolved oxygen concentration, the pH value, the water temperature and the hydraulic retention time, two denitrification ways are synergistically carried out in the same reactor, so that the total nitrogen removal efficiency is improved, the addition amount of an external organic carbon source is reduced, and the sludge yield is reduced. The method is suitable for deep denitrification treatment of secondary effluent of municipal sewage treatment plants and nitrogen-containing wastewater such as coal chemical industry wastewater, petrochemical industry wastewater, printing and dyeing wastewater, food processing wastewater and aquaculture wastewater.

The present application relates to a method for realizing anaerobic ammonia oxidation bacteria enrichment under the joint regulation of NLR and HRT in the field of sewage biological treatment technology, which aims at the problems of anaerobic ammonia oxidation bacteria being greatly affected by the environment and slow enrichment, etc. + -N and NO2 ‑ -N is pumped into the SBR reactor, and the enrichment of anaerobic ammonia oxidation bacteria is successfully realized by continuously changing the hydraulic retention time and the substrate concentration of the influent. The total nitrogen removal rate is stably maintained at 75%, which has good removal efficiency, and the flexible regulation of the reactor is beneficial to the rapid start of the anaerobic ammonia oxidation reactor, providing a theoretical reference for the practical application of the Anammox process. It is simple to operate, easy to manage, has high treatment efficiency, and has good popularization and application prospect.

The application provides a water quality maintaining system based on a composite wetland system suitable for low temperature, and belongs to the technical field of river water treatment, and comprises a pre-deposition ecological pond, a horizontal subsurface flow wetland and a multi-pond system which are sequentially connected, the pre-deposition ecological pond is provided with a water inlet, the multi-pond system is provided with a water outlet, the water flow path in the horizontal subsurface flow wetland is in a multi-segment curved shape, and the multi-pond system is provided with at least two submerged plant ponds which are connected with each other; wherein the pre-deposition ecological pond is provided with a gate body with a gate opening at the water inlet, a gate and a filtering device are arranged in the gate body in a lifting mode, a driving assembly for driving the gate and the filtering device to move in opposite directions is arranged in the gate body, and the gate body is provided with a containing groove at the bottom for the gate and the filtering device to descend; when the gate body is located in the containing groove, the filtering device is located at the gate opening of the gate body, and the filtering device is used for filtering and treating the water passing through the gate body. The application greatly increases the hydraulic retention time and improves the wetland water quality treatment effect.

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.

The present application relates to sewage advanced denitrification treatment technical field, the present application discloses a kind of iron manganese composite filler, preparation method and the method for strengthening low C / N sewage advanced denitrification.Iron powder, activated carbon powder, manganese oxide and binder are calcined under high-temperature anaerobic condition to form iron manganese composite filler.Wastewater is extracted from water storage tank by peristaltic pump, first from the artificial wetland lower water inlet filled with iron manganese composite filler, it is fully reacted in artificial wetland under the condition of 20-22 ℃, hydraulic retention time is 12-24 h, then from the artificial wetland upper water outlet, the treated water is discharged through water outlet pipe.The advantages of the present application include:strengthening autotrophic denitrification advanced denitrification, the method does not need aeration, low cost, simple operation, easy to manage, improve the advanced denitrification performance of artificial wetland to sewage, the removal rate of nitrate nitrogen can reach 96.34% on average, the removal rate of total nitrogen can reach 84.68% on average, the removal rate of COD can reach 76.80% on average.

The utility model discloses a fluorine-containing wastewater pretreatment device which comprises a series system consisting of a wastewater regulating tank, a multi-stage reaction unit, an inclined tube sedimentation tank, a treatment tank, a TMF (Tetramethylbenzidine) circulating unit and an activated carbon filter tank. The innovation points are as follows: the multi-stage reaction unit adopts the volume gradient design of a first-stage reaction tank and a second-stage reaction tank in a ratio of 1: 1.2-1.5, and is provided with a continuous turn-back type deflection baffle, so that the hydraulic retention time is prolonged by 40-60%, and the chelation reaction of fluorine ions and ferric salt / aluminum salt is enhanced. 50-60-degree hexagonal honeycomb filler is adopted in the inclined tube sedimentation tank to improve the floccule interception efficiency, a gel growth tank with an online particle size detection function is additionally arranged between the treatment tank and the TMF unit, and PAC is accurately added through 80-150-micrometer floccule particle size threshold value control. The matched sludge treatment system converts the fluorine-containing sludge into activated carbon through oxygen-controlled carbonization at 400-600 DEG C, so that the hazardous waste is reduced, and the adsorption capacity of the filter tank is improved. According to the device, through the multi-stage synergistic effect, the fluorine removal rate is increased, and meanwhile, the problem of blockage of the TMF membrane assembly is effectively avoided.

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 belongs to the field of wastewater treatment, specifically relating to a method for deep denitrification of wastewater via autotrophic denitrification. Modified sulfur and sodium thiosulfate are used as electron donors, and an adsorbent is used to adsorb sulfate ions. A sulfur solution is used as the solvent phase; oligodextrose and polyethylene glycol are dissolved in water as the antisolvent phase; the antisolvent phase and solvent phase are mixed, ultrasonically dispersed, and dried to obtain modified sulfur; silica is loaded onto the surface of hydrotalcite, etched with organic acid, and heat-treated to obtain the adsorbent. The method of this invention yields elemental sulfur with higher solubility and dispersion, less loss, and effective adsorption of sulfate ions. It achieves good denitrification effect with a shorter hydraulic retention time and low denitrification cost.

The invention discloses a combined four-stage constructed wetland water quality purification system, which relates to the technical field of ecological management, and comprises a spatial topology layout module, a water quality control module, a water quality control module and a water quality control module, the method comprises the following steps: establishing a four-stage purification target sequence of pretreatment and sedimentation stage-main nitrification stage-deep denitrification stage-ecological stability stage, and generating an ecological hydrological space topology layout in the descending direction of hydraulic gradient and gravitational potential energy by combining natural terrain and hydrological conditions of a site; the multi-modal pollution collaborative purification module is used for sequentially configuring multi-functional coupling reaction regions with four stages of purification target sequences, specifically implanting a structured functional medium, and establishing a multi-modal pollution collaborative purification unit through a filler-plant-animal-microorganism synergistic effect; the directional conversion module is used for driving the hydraulic retention time of each purification unit by utilizing gravitational potential energy so as to realize optimal matching of hydraulic dynamic conditions of each purification unit and biochemical reaction requirements. According to the invention, the ecological safety of effluent is enhanced.

The invention discloses a composite carbon source and a sewage treatment method, the composite carbon source comprises a first carbon source and a second carbon source, the first carbon source is ethylene glycol, the second carbon source is selected from at least one of glycerol, molasses, cassava treatment liquid, food waste liquid, vinasse biogas slurry and fermentation liquor, and the mass fraction of ethylene glycol is greater than or equal to 5 wt%. According to the composite carbon source, the first carbon source and the second carbon source are scientifically compounded, so that the sewage treatment efficiency and effect are remarkably improved. Ethylene glycol has the advantages of being stable in chemical property, moderate in biodegradation rate, safe to store and the like, and can provide continuous electron donors for the denitrification process; glycerol, molasses or fermentation liquor is rich in easily degradable organic matters, so that the denitrification reaction can be quickly started, and the defect of relatively slow initial response of ethylene glycol is overcome. Under the synergistic effect of the two, a'quick start-stable supply 'dual-mode carbon source supply mode is formed, the utilization rate of the carbon source is effectively increased, and a higher water treatment effect is achieved within the same hydraulic retention time.

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 utility model relates to the field of anaerobic biological treatment of industrial wastewater, and provides a microbial electrochemical coupling hydrolytic acidification reactor which comprises a reactor tower body, and a water distribution device, a cathode filler, an anode sieve plate and a three-phase separator which are arranged in the reactor tower body at intervals from bottom to top, the cathode filler is connected with the cathode of the direct-current power supply, the anode sieve plate is connected with the anode of the direct-current power supply, the top of the reactor tower body is provided with a wastewater outflow port and a biogas cabinet, the bottom of the reactor tower body is provided with a water inlet and is connected with a water inlet pump, and the water inlet pump is connected with a water distribution device through the water inlet. Through the design of the microbial electrochemical coupling hydrolytic acidification reactor, the dyeing and finishing wastewater treatment efficiency is remarkably improved, the hydraulic retention time is shortened, the environmental protection investment and operation cost are reduced, and meanwhile, the stability of the treatment effect is improved.

The invention relates to the technical field of oil-water separation, in particular to a static unpowered multi-cavity rotational flow and multi-fiber synergetic oil-water separation system, which comprises a data acquisition module, an oil-water separation module, an oil-water separation module and an oil-water separation module, the particle size grading module is used for determining whether the separation state of the first cavity and the second cavity is qualified or not based on the separation efficiency of the first cavity and the separation efficiency of the second cavity and determining a flow field rectification strategy; the flow field rectification module is used for determining whether the flow field stability reaches the standard or not based on the pressure drop fluctuation coefficient, and determining that the hydraulic retention time is prolonged if the flow field stability does not reach the standard; the oil-water separation module is used for determining and adjusting the water inlet flow based on the initial surface load rate and feeding back and correcting the initial surface load rate based on the coalescence demulsification efficiency; the terminal sedimentation module is used for determining whether oil-water separation is qualified or not based on the oil phase and suspended matter removal rate; and a parameter optimization module that determines an optimized load distribution ratio or an initial surface load rate based on the collaborative diagnostic index. According to the invention, the technical problem of separation control between oil-water separation equipment is solved.

The present invention relates to a volume-variable CSTR anaerobic fermentation tank, comprising a fermentation tank body. The fermentation tank body consists of a top cover and a tank body, the bottom of the tank body being connected to a tank foundation, and the interior of the tank body being divided into a jacking zone at the bottom and a fermentation zone at the top by means of an intermediate sealing layer; the bottom of the intermediate sealing layer is provided with a plurality of jacking units that extend and retract under the control by a controller; and the jacking units can drive the intermediate sealing layer to descend and ascend, thereby changing the volume of the fermentation zone. By means of the descending and ascending of the jacking units, the volume of the fermentation zone in the fermentation tank body may vary along with the fluctuation of feed quantities, so that the hydraulic retention time of the inside of the tank tends to be stable, thereby ensuring fermentation effect. Submersible agitators and crust-breaking agitators for breaking crusts are applied, which avoid affect on the progress of fermentation reactions, such that the fermentation effect and biogas yield are improved while reducing energy consumption, thereby further ensuring fermentation effect.

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.

The present application relates to sewage treatment technical field, specifically to a kind of denitrification membrane bioreactor sewage treatment method.The present application overcomes the problem of low efficiency of denitrification and phosphorus removal in traditional sewage treatment method.The present application effectively adsorbs and decomposes ammonia nitrogen molecules in sewage by preparing hydrophilic suspended filler;Suitable aeration intensity and adjusting the hydraulic retention time between each unit make organic matter in sewage and sludge decompose deeply, form gradient environment of aerobic, anoxic and anaerobic;Microbial growth promoter as electron donor, supply the carbon source and nitrogen source required for microbial growth and reproduction;Mechanical stirring is carried out in anoxic unit, and suitable swing angle is set in each unit cell, so that sludge and microorganisms are fully contacted, the filtration capacity in denitrification membrane bioreactor is improved, and the time of biofilm formation is shortened;Linkage is formed between anaerobic unit, anoxic unit, membrane separation zone and aerobic unit, and the efficiency of denitrification and phosphorus removal in denitrification membrane bioreactor is improved.

The invention relates to the technical field of water filtration, in particular to a module filtration direct drinking water control method which is applied to direct drinking water equipment comprising 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 flow meter, and constant-pressure water supply is conducted at the first target pressure and the second target pressure in the peak period and the low peak period respectively; the maximum safe flow capable of being dynamically updated is set, when the instantaneous flow exceeds the limit, the output of the high-pressure pump is limited, and the pressure tank is switched to supplement pressure for water supply; when the peak is low and the demand is lower than a threshold value, the water storage capacity of the pressure tank is preferentially consumed; a pipe network hydraulic retention time model is established, a backflow electric valve and a sterilization device are opened when retention exceeds a threshold value, the microbial risk is reduced, and the water supply stability is improved.

The novel filtering device comprises a right-side tank body, a middle tank body and a left-side tank body which are divided by partition plates, a water inlet is formed in the bottom of the right-side tank body, and the top of the right-side tank body controls the height of an upper communication opening through a liftable water level adjusting piece to achieve dynamic hydraulic retention time adjustment; filter units with positioning structures are stacked in the middle tank body, and a lower communication port is formed in the bottom of a partition plate between the middle tank body and the left tank body; the left tank body integrates a water pump and a water spray nozzle to form a circulation path and increase the dissolved oxygen content of the water body. The fish tank comprises a tank body and a vertical notch formed in the top end of the tank body and used for intercepting floating foam on the water surface, and the novel filtering device is arranged on one side of the tank body. According to the utility model, through the design of modularized quick release, dynamic water level control, accurate positioning, floating foam interception and the like, the problems of complicated maintenance, insufficient filtration, poor load adaptability and the like of a traditional filtering device are solved, high-efficiency and low-maintenance water quality management is realized, and the water quality management device is suitable for aquaculture and fish tank scenes.

This invention relates to an intelligent continuous flow system and method for deep nitrogen and phosphorus removal from wastewater treatment plant effluent with low-activity sludge concentration. Belonging to the technical field of wastewater treatment system purification, the system is designed based on the denitrification phosphorus removal principle. It consists of a nitrification tank, three anaerobic tanks, three anoxic tanks, one aerobic tank, and a sedimentation tank. By measuring the nitrate nitrogen concentration in the effluent and precisely adding an organic carbon source, the system controls the endpoints of nitrification and denitrification reactions online. Due to its short hydraulic retention time, the system can operate at high speed and efficiency, produces no byproducts, and avoids secondary pollution. The purified water meets or exceeds Class III standards of my country's surface water quality standards. This invention provides a better technical solution for addressing the secondary eutrophication pollution caused by surface discharge of effluent from existing wastewater treatment plants and the challenges of upgrading existing wastewater treatment plants. It also has significant implications for the restoration of water quality in water source protection areas and eutrophic water bodies.

The invention relates to a domestic waste incineration plant leachate treatment system and a use method thereof, and relates to the technical field of sewage and wastewater treatment.The domestic waste incineration plant leachate treatment system mainly comprises a pretreatment system, an anaerobic system, an MABR biochemical system, a deep treatment system and an auxiliary system which are sequentially arranged, the auxiliary system comprises a sludge system, a heat exchange system, a dosing system and an odor collection system. The pretreatment system is used for removing most suspended matters, the heating system is used for preserving heat, the UASB reactor is used for performing anaerobic digestion and efficiently degrading organic matters, the MABR biochemical system is used for synchronously performing nitrification and denitrification for nitrogen removal, the heat exchange system is used for controlling the water temperature of the MABR biochemical system to be stable, the tubular ultrafiltration system is used for realizing separation of sludge age and hydraulic retention time, and the MABR biochemical system is high in microbial diversity and low in sludge yield; further pollutant removal is carried out through deep treatment, and finally, stable effluent quality is ensured. The device can realize full-quantitative treatment of the leachate of the household garbage incineration plant, and has the advantages of small occupied area, low carbon emission, low operation cost and the like.