414 results about "Aeration rate" patented technology

Submerged gas diffuser assemblies configured to aerate liquid suspensions in reservoirs or deep shafts with enhanced aeration contact patterns and adjustable aeration rates. Aeration contact patterns and rates are varied by the adjusting the spatial configuration of gas permeable membranes, altering the fluid flow patterns around the membranes, manipulating trans-membrane pressures across membranes, varying the sequence of aeration of liquid within the fluid flow patterns, expanding the membrane surface area, and / or by selectively occluding certain portions of membrane surface area of the membrane assemblies. The membrane assemblies are designed to prevent, control, or mitigate membrane fouling and hydro lockup.

A rapid starting method of a membrane bioreactor completely-autotrophic nitrogen removal technology belongs to the municipal sewage processing and recycling fields. The starting method of a completely-autotrophic nitrogen removal technology in a membrane bioreactor (MBR) comprises the following steps: inoculating nitrated sludge of the aeration tank of a municipal sewage plant, and recovering the activities of sludge at normal temperature under low ammonia nitrogen of inlet water; reducing the aeration rate and gradually increasing the ammonia nitrogen concentration to successfully enrich ammonia oxidizing bacteria; and reducing the aeration rate, reducing DO, and inducing anaerobic ammonia oxidizing bacteria to successfully start the completely-autotrophic nitrogen removal technology. Problems comprising slow starting and strict sludge inoculation requirement of a completely-autotrophic nitrogen removal technology are solved in the invention, and the rapid starting method of the shortcut nitration in the MBR realizes the efficient ammonia nitrogen removal, and provides a way for the long-term efficient and stable running of the shortcut nitration in the MBR.

A starting and running method of a completely autotrophic ammonium removal over nitrite technology belongs to the water environment recovery and regeneration fields. The starting and efficient and stable running method of the completely autotrophic ammonium removal over nitrite (CANON) technology in a biofilter reactor at normal temperature comprises the following steps: inoculating sludge, carrying out filter material film forming under an anaerobic and anoxic condition, starting CANON under an oxygen limited condition, and controlling the hydraulic retention time and the aeration rate in a combined mode to realize the high-load stable running. The CANON technology is started within 61d, the total nitrogen removal load in the 42d running after starting reaches 3.52kg.m<-3>.d<-1>, and the load is an extremely high level in the research field of the CANON technology, so the method has a simple operation, is easy to implement, and can realize the effective and rapid starting and the high-load running of the CANON technology.

The invention discloses a multi-stage A / O biological nitrogen removal device and a multi-stage A / O biological nitrogen removal method based on shortcut nitrification-anaerobic ammonia oxidation of municipal sewage, and belongs to the field of sewage biological treatment. The device mainly consists of an SBR (styrene butadiene rubber) carbon removal reactor, a middle water tank, a multi-stage A / P nitrogen removal reactor and a sedimentation tank, wherein domestic sewage firstly enters the SBR reactor to aerate to remove part of organic substances in raw water, and then enters the A / O reactor to realize shortcut nitrification-anaerobic ammonia oxidation by virtue of alternating aerobic / anoxic reaction. Sludge in a secondary sedimentation tank flows back to a first-section anoxic zone, so that nitric nitrogen in the flowed-back sludge can be reduced by utilizing COD (chemical oxygen demand) in raw material while the concentration of sludge in the A / O reactor is guaranteed. According to the multi-stage A / O biological nitrogen removal device, shortcut nitrification and anaerobic ammonia oxidation reaction of the domestic sewage are realized by utilizing low-oxygen aeration and bio-contact oxidation, so that the aeration rate is low, and the sludge yield is low; and moreover, an external carbon source is not required to add, so that the multi-stage A / O biological nitrogen removal device has the characteristics of energy saving and consumption reducing, improves the stability of the reactor, and is convenient to operate.

The invention relates to a method for recovery of contaminated groundwater through in situ enhanced aeration, which comprises the following steps: digging more than one surfactant injection well, an aeration well and an extraction well in an area with the groundwater contaminated, injecting surfactant into the area with the groundwater contaminated through the surfactant injection well to dissolve the surfactant into the groundwater so as to form surface tension in the area with the groundwater contaminated, starting the extraction pump to pump an aeration zone into negative pressure, and starting the aeration pump for continuous aeration. The invention effectively solves the problem that the majority of pollutants can be removed only after flowing into the porous channel through diffusion due to the narrow porous channel near the aeration well, and improves the saturation degree of the air in the groundwater, thereby increasing opportunities of exposure the pollutants to the air. Tests show that, when the aeration rate is 100ml / min, the surface tension is reduced to 50.4dyn / cm from 70.5dyn / cm, the half-life for removal of the pollutant chlorobenzene is reduced to 16min from 31min, and simultaneously the trailing concentration is reduce to 5.1mg / L from 22.08mg / L. The removal rate can be increased to 98.5 percent from 89.2 percent after 420 minutes. The invention has the advantages of simple process, low cost, low surfactant injection and less impact on the environment.

The invention discloses a control method for a partial nitrification-anaerobic ammonia oxidation integrated SBR (Sequencing Batch Reactor) denitrification process. The method consists of a dissolved oxygen-ammonia nitrogen control method and a pH-ammonia nitrogen control method respectively, wherein the dissolved oxygen-ammonia nitrogen control method comprises the steps that a dissolved oxygen on-line electrode and an ammonia nitrogen on-line electrode are utilized, the aeration rate is controlled through the dissolved oxygen on-line electrode, furthermore the concentration level of NO2-N in an SBR is controlled so as to synchronously carry out the partial nitrification and the anaerobic ammonia oxidation reaction in one same SBR, and the ammonia nitrogen residual concentration in the SBR is controlled through the ammonia nitrogen on-line electrode; and the pH-ammonia nitrogen control method comprises the steps that a pH on-line electrode and the ammonia nitrogen on-line electrode are utilized, an aeration system is controlled to stop through the decreasing amplitude delta pH1 of the pH at the nitration period, the aeration system is controlled to start through the increasing amplitude delta pH2 of the pH in the anaerobic ammonia oxidation period, the partial nitrification and the anaerobic ammonia oxidation reaction are carried out in one same SBR alternatively, and the ammonia nitrogen residual concentration in the SBR is controlled through the ammonia nitrogen on-line electrode.

The invention discloses a dissolved oxygen control method based on a dynamic radial basis function neural network, which adopts the following steps of: determining a control object; designing a dynamic RBF neural network topology structure used for a dissolved oxygen DO controller during sewage treatment; correcting sample data; training a neural network by using part of the corrected data, controlling dissolved oxygen (DO) by using the trained RBF neural network, and taking an error between anticipant DO concentration and actually output DO concentration and an error change rate as the input of the RBF neural network, wherein the output of the RBF neural network is the input of a frequency transformator, and the frequency transformator achieves the purpose of controlling a blower by adjusting the rotating speed of an electromotor so as to finally control aeration rate. The output of the whole control system is the actual DO concentration; the control effect of the controller is improved; the dissolved oxygen meets the anticipant requirements quickly and accurately; and the problem of poor self-adaptive capability based on switch control and PID control is solved.

A water quality control method for indoor cultivation of Penacus orientalis relates to a cultivation method of Penacus orientalis, and solves the problems that efficacy of probiotics used in the existing culture process cannot be given to full play and the like. Preparation before entry into a pond includes preparation of a culture pond, sterilization of culture water, adhesion of probiotics, inoculation of the probiotics and water environmental conditioning. Water quality regulation in the early stage of cultivation includes: continuously splashing mixed liquor 0.5L / m3 of the probiotics and rice hulls in water for 5-7 days after entry of Penacus orientalis into the pond until a great quantity of suspended fluctuant particles occur in the water and the transparency is 40-50cm, increasing aeration rate to fully aerate the fluctuant particles and part of the rick hulls, and increasing the water level by 5cm each day; and adjusting water quality in the mid-late stage of cultivation, namely mixing live bacteria into daily fodder, changing 15%-30% of water once every 7-15 days, and splashing quick lime once every 10-15 days.

Methods, systems, and apparatuses for anaerobic digestion of waste fibrous material and the recovery of nutrients are provided. Methods, systems, and apparatuses disclosed herein provide mechanisms to release dissolved gases from anaerobic digester effluent. Methods, systems and apparatuses disclosed herein can recover one or more nutrients from anaerobic digested effluent using a range of temperatures, aeration rates, aeration times, pH ranges, and settling times.

The invention provides an aeration rate control method and system. The method comprises the following steps: setting an expected dissolved oxygen concentration, calculating first oxygen transfer ratio on the basis of parameters of the aeration device according to the difference between the actual dissolved oxygen concentration and expected dissolved oxygen concentration, determining the aeration rate increment / decrement capable of enabling the actual dissolved oxygen concentration to reach the expected dissolved oxygen concentration according to the difference between the expected dissolved oxygen concentration and actual dissolved oxygen concentration, the oxygen consumption absorption rate and the first oxygen transfer ratio, determining the aeration rate control parameters according to the aeration rate increment / decrement, and adjusting the aeration rate according to the aeration rate control parameters. Therefore, according to the aeration rate control method and system, the difference between the expected dissolved oxygen concentration and actual dissolved oxygen concentration, the oxygen consumption absorption rate and the first oxygen transfer ratio are utilized to determine the aeration rate increment / decrement capable of enabling the actual dissolved oxygen concentration to reach the expected dissolved oxygen concentration, thereby implementing the real-time accurate adjustment on the aeration rate. Thus, the sewage treatment effect is more stable and effective.

The invention discloses an effluent index online soft measurement prediction method in the urban sewage treatment process. According to the method, firstly an instant learning model structure with correlation as the principle and the recursive partial least-square method as a local model is adopted, and meanwhile, description on uncertainty of the model is performed on the basis of the statistical learning theory. The model can be used for fully reflecting the characteristics such as uncertainty and large lag of the sewage treatment process, the explanatory performance of a prediction result is higher, controllers can adjust process variables such as the aeration rate and the backflow amount of an aeration tank in time, material balance and bacterial population balance are kept, and efficient removal of organic matter is achieved fully.

The invention belongs to the technical field of landfill leachate biological nitrogen removal and relates to a device and method for advanced nitrogen removal of mature landfill leachate. The device is provided with a raw water tank and an integrated autotrophy nitrogen removal SBR reactor. The integrated autotrophy nitrogen removal SBR reactor is internally provided with a heating device, a stirring device and an aeration device. The method comprises the following steps: the mature landfill lachate is driven into the integrated autotrophy nitrogen removal SBR reactor by a peristaltic pump to enable the dissolved oxygen of the reactor to be from 0.1 to 0.5 mg / L at the aeration stage through the control of the aeration rate so as to achieve short-range nitration-anaerobic ammoxidation; and nitrite nitrogen generated by the short-range nitration can be timely utilized by anaerobic ammonium oxidation bacteria through an operation method of circulating intermittent aeration of aeration / anaerobic stir to enable the nitrite nitrogen residue not to remain in the reactor. The mature landfill leachate advanced nitrogen removal device is applicable to the treatment of the mature landfill leachate, and the purpose of the mature landfill leachate advanced nitrogen removal is achieved without any addition of external carbon source conditions.

The invention discloses a rapid start-up and stable maintenance short-cut nitrification / anaerobic ammonia oxidation-integrated device and method based on hydroxylamine, and belongs to the field of biological treatment of urban domestic wastewater. Stable operation of short-cut nitrification and activity of anaerobic ammonium oxidation bacteria matched with the short-cut nitrification are very important to a short-cut nitrification / anaerobic ammonia oxidation-integrated process, rapid start-up and stable maintenance of operation of the short-cut nitrification / anaerobic ammonia oxidation of theurban wastewater are very difficult to realize only by controlling of process parameters. The effect of inhibiting of the activity of nitrite-oxidizing bacteria and increasing of the activity of anaerobic ammonia oxidation can be achieved by adding of the hydroxylamine (HA), and a short-cut nitrification / anaerobic ammonia oxidation-integrated reactor can be started in a short time, and better treatment results can be maintained. Compared with a traditional nitrification-denitrification nitrogen removal process, the short-cut nitrification / anaerobic ammonia oxidation-integrated process saves aeration rate, reduces sludge production, saves carbon sources, and is especially suitable for low-C / N urban domestic wastewater.

The invention relates to a multifunctional catamaran device for water remediation comprising a catamaran system, a solar energy system, a re-aeration and biological accelerator dispensing system, a water cleaning system and a water on-line monitoring system, wherein the catamaran system is a mobile carrier of each system; the catamaran is a connected structure on the water and is a disconnected structure under the water; the catamaran is labor-saving and power-saving; solar panels of the solar energy system are mounted on the entire area of a catamaran roof and the partial area of flares for energy absorption and storage; the solar energy system is a hybrid power supply device by using solar energy as the main power and being supplemented by network power and generators; the re-aeration and biological accelerator dispensing system quantifies, adjusts to increase, adjusts to decrease the aeration rate and dispenses to increase the amount of the biological accelerator according to the water quality of waters; the water cleaning system utilizes the traveling of a catamaran body to take the initiative to collect trash in the water, and then dumps the trash at stations by self; and the water on-line monitoring system measures the water quality of different waters and provides processed data. Compared with the prior art, the multifunctional catamaran device for the water remediation is more advanced as an integrated device by integrating the solar energy system, the re-aeration and biological accelerator dispensing system, the water cleaning system and the water on-line monitoring system.

The invention discloses a device and a method for coupling short-cut denitrification phosphorus removal with anaerobic ammonia oxidation, and belongs to the field of biological sewage. The method comprises the following steps: performing anaerobic phosphorus release on phosphorus-accumulating bacteria by utilizing organic carbon sources in domestic sewage after municipal sewage flows into an A2O-SBR reactor and synthesizing into a PHA storage body; enabling a portion of nitration liquid in an N-SBR reactor to flow back to the A2O-SBR reactor for performing oxygen deprivation reaction; performing micro-aeration on the A2O-SBR reactor after the oxygen deprivation reaction is finished so as to complete the absorption of surplus phosphorus and air stripping of nitrogen; standing and precipitating; introducing a portion of drained water of the A2O-SBR reactor into the N-SBR reactor to finish short-cut denitrification; keeping stand and precipitating after short-cut reaction; enabling a portion of supernate to flow back to an oxygen deprivation section of the A2O-SBR reactor and introducing the other portion of supernate and the other portion of drained water of the A2O-SBR reactor into an Anammox-SBR reactor for performing anaerobic ammonia oxidation. According to the device and the method, the carbon sources are reduced, the aeration rate is reduced, the nitrogen and phosphorus removal efficiency is increased, the yield of sludge is reduced, the device and the method are suitable for municipal sewage with low C / N ratio, and the synchronous depth nitrogen and phosphorus removal requirement is met.

The invention discloses an aeration control system and an aeration control method. The aeration control system comprises an aeration tank, a data acquisition unit, a control unit and an aeration unit. The data acquisition unit comprises an oxygen transfer efficiency measuring instrument and a dissolved oxygen measuring instrument; the oxygen transfer efficiency measuring instrument comprises a gas collecting cover and a tail gas delivering tube; real-time oxygen transfer efficiency values can be transmitted to the control unit by the oxygen transfer efficiency measuring instrument via a signal wire; one end of the tail gas delivering tube is connected with the top of the gas collecting cover, and the other end of the tail gas delivering tube is connected with the oxygen transfer efficiency measuring instrument; the dissolved oxygen measuring instrument is connected with the control unit; the oxygen transfer efficiency measured by the oxygen transfer efficiency measuring instrument and the dissolved oxygen concentration measured by the dissolved oxygen measuring instrument can be transmitted to the control unit; a blower can be adjusted by the control unit according to the transmitted oxygen transfer efficiency and the transmitted dissolved oxygen concentration. The aeration control system and the aeration control method have the advantage that the internal aeration rate of the aeration tank can be precisely controlled by the aid of the aeration control system and the aeration control method.

The invention relates to an image data extraction and neural network modeling-based platinum flotation grade estimation method. The method comprises the following steps: acquiring the correlation degrees between six variables of aeration rate, pulp density, a collecting agent, an activating agent, a foaming agent and an inhibitor and flotation grade and recovery rate by an variable experiment; carrying out collection and pretreatment on a platinum foam image; extracting five image data of energy, entropy, inertia, homogeneity and gray correlation from four tolerant feature images such as gray level images, histogram equalization, contrast enhancement of images and image binarization obtained by pretreatment; and building a multi-layer perceptron neural network model comprising a three-node input layer, a hidden layer and a dual-node output layer. According to the image data extraction and neural network modeling-based platinum flotation grade estimation method provided by the invention, flotation grade and recovery rate are effectively estimated through the foam image, and the target of monitoring grade and recovery rate in the flotation process in real time is achieved.

Methods, systems, and apparatuses for anaerobic digestion of waste fibrous material and the recovery of nutrients are provided. Methods, systems, and apparatuses disclosed herein provide mechanisms to release dissolved gases from anaerobic digester effluent. Methods, systems and apparatuses disclosed herein can recover one or more nutrients from anaerobic digested effluent using a range of temperatures, aeration rates, aeration times, pH ranges, and settling times.

The invention discloses a sulfur autotrophic short-cut denitrification coupled anaerobic ammonia oxidation denitrification system and a sulfur autotrophic short-cut denitrification coupled anaerobic ammonia oxidation denitrification method. The system comprises an anaerobic reactor, a nitrification reactor, a first intermediate water tank, a second intermediate water tank, a sulfur autotrophic short-cut denitrification reactor, an anaerobic ammonia oxidation reactor and a sulfide wastewater storage device. Sewage respectively enters the anaerobic reactor and the nitrification reactor, and is respectively subjected to anaerobic reaction and anaerobic-aerobic reaction; the sewage subjected to aerobic nitrification and sulfide wastewater enter the sulfur autotrophic short-cut denitrificationreactor together, and nitrate nitrogen is reduced into nitrite nitrogen to realize accumulation of nitrite nitrogen; the sewage subjected to short-cut denitrification and the sewage subjected to anaerobic treatment and rich in ammonia nitrogen enter the anaerobic ammonia oxidation reactor together to remove nitrogen. According to the method, stable accumulation of nitrite nitrogen is realized by applying sulfur autotrophic short-cut denitrification, an external carbon source is not needed, the aeration rate is low, the operation control is simple, sulfur in sulfide wastewater can be recycled,and a new method is provided for efficient denitrification of low-C / N domestic sewage.

The invention provides a novel low-energy MBR (Membrane Bioractor) sewage treatment complete equipment and remote control system, mainly comprising two parts, i.e., novel low-energy MBR sewage treatment complete equipment and a remote control system; after entering the MBR sewage treatment complete equipment, sewage passes through a fine rack, a stabilization pond, an adjusting tank, a lift pump, an automatic cleaning filter, an integrated A2 / O-MBR reaction tank, a dump pump, an ultraviolet sterilizer and a reclaimed water tank sequentially; by the novel structure of the integrated A2 / O-MBR tank, not only can higher denitrification and phosphorus removal efficiency be obtained, but also aeration rate can be reduced by over 50%; a simple variable aeration method of an electrically operated three-way valve is adopted, so that total aeration rate is again reduced by over 50%; the new structure and the variable aeration method are combined, so that the aeration rate of the MBR sewage treatment complete equipment is 25 to 30% of the original aeration rate, and has the characteristics of high efficiency in denitrification and phosphorus removal, small occupied area and low energy consumption; the remote control system is adopted, and dozens and even over one hundred of the MBR complete equipment can be managed intensively by using an Internet network long-distance data processing function and can realize unattended operation, so the problem of difficulty in later maintenance is solved.

The invention provides a device and a method for starting micro expansion of sludge in the anoxic / aerobic biological denitrification process, and belongs to the technical field of sewage treatment. The method is characterized in that in an anoxic / aerobic biological denitrification system, the micro expansion of the sludge is started, the micro expansion of the sludge is controlled within a certain limit, treatment effects are optimized and energy consumption is saved. The proposal of starting the micro expansion of the sludge in the anoxic / aerobic biological denitrification system comprises: 1, triggering the micro expansion of the sludge only by low dissolved oxygen, and including two starting modes for gradually lowering the dissolved oxygen concentration and suddenly lowering the dissolved oxygen concentration; and 2, starting the micro expansion of the sludge in the mode of the low dissolved oxygen combined with the low load. The device and the method are mainly used to optimize operational effects of the anoxic / aerobic biological denitrification sewage treatment system, namely under the conditions of lowering the dissolved oxygen concentration, saving aeration rate and saving energy, the pollutant-removing rate is ensured to meet the standards, and simultaneously the concentration of effluent suspended matters is greatly reduced.

The invention discloses a deep neural network-based dissolved oxygen concentration control method and system. The method includes the following steps that: a plurality of groups of raw data in waste water are detected and collected; a deep neural network model is established according to the raw data; and the deep neural network model is used to calculate control parameters; and an aeration rate is adjusted according to the control parameters. According to the deep neural network-based dissolved oxygen concentration control method and system of the invention, the dissolved oxygen model of the deep neural network is established so as to accurately control dissolved oxygen.

The invention relates to an underground water advection percolation system used for town sewage treatment, concretely comprising a water distribution region, a filler bed, water distribution baffles, aerator pipes, a water collecting region, impermeable layers, geotechnical cloth interlayers, a surface planting soil layer and plants. The whole of the system provided by the invention is of a strip-shaped groove bed body structure, the water distribution region and the water collecting region are respectively arranged at the two ends of the filler bed body, the water distribution baffles divide the filler bed into a plurality of compartment units, aerator pipes are arranged at the lower part of filler in each odd number compartment, aeration rate can be regulated, the impermeable layers are arranged at the bottom of the filler bed and the periphery of the filler bed, a plurality of geotechnical cloth interlayers are paved at the upper part of the filler bed, the surface planting soil layer is arranged at the upper part of each interlayer, and crops can be planted. According to the system provided by the invention, multi-stage water distribution baffle design is adopted, so that contact uniformity of sewage and filler is effectively improved; biomass carbon modified filler substrate is adopted, and soil layers are planted, so that sewage purification performance is enhanced; and alternate filler bed aerator design is adopted, so that a multi-stage aerobic n / anoxia m alternate mode is presented in a filler bed body, and total nitrogen removal effect of the system provided by the invention is improved.

The invention discloses a sewage treatment aeration control system, which comprises an inlet water quality sensor, an inlet water flow sensor, an outlet water COD sensor, an aeration tank NH4-N sensor, an MLSS sensor, a dissolved oxygen (DO) sensor, a liquid level sensor, a pressure sensor, an air volume regulating valve, a flowmeter, a PLC, an upper computer, a blast blower, a data server and a blast blower control cabinet. The PLC is used for sending inlet water quality data, inlet water flow data, outlet water COD data, NH4-N data, MLSS data, a DO value, liquid level data, pressure data, the regulating valve opening degree and air volume data to the upper computer and regulating the opening degree of the flow regulating valve according to first data transmitted back by the upper computer; and the blast blower control cabinet is used for controlling the blast blower according to second data transmitted back by the upper computer. According to the sewage treatment aeration control system, the sewage treatment outlet water quality and the aeration rate needed by blast aeration can be automatically predicted, the blast blower and the air volume regulating valve are automatically regulated according to prediction results, and it is guaranteed that the outlet water quality is stable and reaches the standard.

The present invention relates to a transformed Agrabacterium tumefaciens BNQ-pGPRX11 (Accession No. KCCM-10554) harboring a recombinant expression vector (pGPRX11). Further, the present invention also provides a fermentation method for maximum production of coenzyme Q10 using a transformed Agrabacterium tumefaciens deposited to Korean Culture Center of Microorganism with accession number KCCM-10554 comprising the steps of: i) fermenting transformed cells on production medium comprising 30˜50 g / L of corn steep powder, 0.3˜0.7 g / L of KH2PO4, 0.3˜0.7 g / L of K2HPO4, 12˜18 g / L of ammonium sulfate, 1.5˜2.5 g / L of lactic acid, 0.2˜0.3 g / L of magnesium sulfate on condition that aeration rate of the medium is 0.8˜1.2 volume of air per volume of medium per minute, temperature 30˜34° C. and pH is 6.0˜8.0; ii) removing the transformed cells and other residue from the fermentation medium; and iii) separating and recovering coenzyme Q10 from the fermentation medium of step (ii).

The invention belongs to the fields of treatment and regeneration of municipal sewage, and particularly relates to a method for rapidly cultivating aerobic granular sludge with good shortcut nitrifying performance. A sequencing batch reactor (SBR) is operated by fixed aeration time and aeration rate by gradually shortening the settling time; and the shortcut nitrifying granule sludge is rapidly cultivated. The granulation of common floc sludge is successfully achieved within 20 days via three stages of overdue cultivation, granule forming and granule maturation; the nitrite accumulation rate (NAR) achieves 80% within 80 days; the mean grain size is greater than 800 microns; the removal rate of the NH4<+>-N is close to 100%; and the removal rate of the chemical oxygen demand (COD) is 94%.

The invention relates to a method for processing membrane filtration concentrated solution of middle and late leachate in a refuse landfill and belongs to the technical field of the environment protection. The method comprises the following steps: adjusting a pH value of the membrane filtration concentrated solution to between 4 and 6.5; adding polymeric aluminium salt or a composite coagulating / flocculating agent the main component of which is polymeric aluminium salt into the adjusted membrane filtration concentrated solution, wherein the adding amount of Al2O3 serving as the polymeric aluminium salt or the composite coagulating / flocculating agent is between 50 and 1,000 mg / L; stirring the mixture for 0.5 to 5 minutes at a speed of between 100 and 280 revolutions per minute, and stirring the obtained product for 3 to 30 minutes at a speed of between 20 and 100 revolutions per minute; after the membrane filtration concentrated solution reacts with the polymeric aluminium salt or the composite coagulating / flocculating agent, carrying out solid-liquid separation; putting clear solution in an iron-carbon bed with a mass ratio of iron to carbon of 1 to 4, wherein the aeration rate is between 100 and 250 cubic meter air per cubic meter water per hour; carrying out micro-electrolysis reaction for 10 to 30 minutes; then adding H2O2 the mass concentration of which is 30 percent to strength micro-electrolysis reaction, wherein the adding amount of H2O2 is between 0.05 and 0.5 L per cubic meter water and the reaction time is between 0.5 and 3 hours; and adjusting the pH of the effluent to between 7.5 and 9.0 to obtain the processed effluent after the solid and the liquid are separated. The method has the advantages of simple operation, relatively lower operation cost, better processing effect and the like.

The invention discloses a method for carrying out synchronous nitrification treatment and denitrification treatment on percolate by using a mineralized refuse reaction bed. A device is arranged. The device comprises the mineralized refuse reaction bed and an aerating apparatus. A solid sampling port is formed in the surface of the mineralized refuse reaction bed, an outlet water sampling port and an aerating pipe are arranged on the lower portion of the mineralized refuse reaction bed, the aerating pipe is connected with a rotor flow meter, the rotor flow meter is connected with an air pump, and the air pump is connected with a control box; a ventilating pipe is arranged in the center of the device, the top of the ventilating pipe is sealed, holes are punched in the wall of the ventilating pipe, the lower portion of the ventilating pipe is connected with the aerating pipe, and the ventilating pipe is wrapped by a sand net; a cover and a funnel are arranged on the top of the mineralized refuse reaction bed, a valve is arranged between the funnel and the cover, and a PVC board with evenly-distributed holes is arranged at the bottom of the cover; the mineralized refuse reaction bed is filled with a gravel layer, a mineralized refuse layer and a beveled gravel layer, the beveled gravel layer is supported by an inclined plate with evenly-distributed holes, and a temperature probe is embedded into the mineralized refuse layer; synchronous nitrification and denitrification can happen in the mineralized refuse reaction bed through adjustment and setting of the aeration rate and operating parameters. By means of the method, synchronous nitrification and denitrification on mineralized refuse can be achieved, and therefore the purpose of treating waste with waste can be achieved.

The invention belongs to the technical field of biological sewage treatment, and relates to a device and a method for realizing the treatment of low-carbon urban wastewater by anaerobic ammonia oxidation coupling denitrifying phosphorus removal through single-stage SBR. After entering an anaerobic ammonia oxidation coupling denitrifying phosphorus removal SBR reactor, urban wastewater is firstly subjected to anaerobic stirring and then subjected to low-oxygen aeration stirring; water containing ammonia nitrogen and phosphorus in a middle water tank returns the anaerobic ammonia oxidation coupling denitrifying phosphorus removal SBR reactor, so as to be subjected to hypoxia reaction; anaerobic ammonium oxidation bacteria is subjected to anaerobic ammonium oxidation reaction through the ammonia nitrogen in returned water and nitrite nitrogen produced in the low-oxygen aeration stage, so as to realize nitrogen removal of the urban wastewater; DPB realizes the removal of phosphorus in the returned water through the action of denitrifying phosphorus removal. According to the method, anaerobic ammonia oxidation and denitrifying phosphorus removal coupling are applied to a wastewater biological nitrogen and phosphorus removal system, simultaneous phosphorus and nitrogen removal is realized, meanwhile an organic carbon source in raw water is sufficiently utilized, the aeration rate is reduced, and the discharge value of excess sludge is further reduced.

The invention designs a sewage disposal process optimal control method based on a multi-objective differential evolution algorithm, and solves the problem that the concentrations of dissolved oxygen (DO) and nitrate nitrogen (SNO) are difficult to optimize and control simultaneously in the sewage disposal process. On the premise of guaranteeing effluent quality to meet national regulation emission standard in a municipal sewage disposal system, the energy consumption is reduced, and the optimization and control for the concentrations of the dissolved oxygen (DO) and the nitrate nitrogen (SNO) are important links for realizing stable operation of the sewage disposal process as well as energy conservation and emission reduction. Aeration energy dissipation AE, pumping energy dissipation PE and cost EQ needing to be paid for receiving waterbody emission pollutants are taken as optimal objectives, the improved multi-objective differential evolution algorithm is used for solving optimal set values for the concentrations of the dissolved oxygen (DO) and the nitrate nitrogen (SNO), and accurate tracking control is carried out by using aeration rate and internal recycle reflux quantity as controlled quantities, so that the effluent quality reaches the standard, the operating cost of the sewage disposal process is reduced, and the benefit for the sewage disposal process is improved.