333results about How to "Reduce aeration energy consumption" patented technology

The present invention relates to a deep denitrification process and device for domestic sewage without additional carbon source. The present invention is a combination process composed of anaerobic acidification tank, micro-aeration vertical underflow wetland and horizontal underflow wetland. The specific process is as follows: The domestic sewage enters the anaerobic acidification tank; the effluent from the anaerobic tank enters the micro-aeration vertical subsurface flow wetland; the treated sewage from the micro-aeration vertical subsurface flow wetland enters the horizontal subsurface flow constructed wetland. The effluent from horizontal subsurface flow wetlands can be used to supplement static landscape water bodies and other purposes. The present invention controls the ratio of NH4+-N / NO3--N in the horizontal subsurface flow wetland influent to 1-1.4:1 through the adjustment of appropriate process parameters, and the actual BOD5 / N is far lower than the theoretical value of denitrification BOD5 / N Under these conditions, anaerobic ammonium oxidation can be stably realized in constructed wetlands, forming a low-cost, high-removal sewage deep denitrification process. Micro-aeration vertical flow wetlands + horizontal subsurface flow wetlands can be applied to sewage treatment plants. Advanced water treatment can also be used for decentralized domestic sewage treatment. The invention has the advantages of simple structure, low cost and convenient operation and maintenance, and can achieve a TN removal rate of over 95%, stable pollutant removal effect, and effluent water quality up to Class IV standard of surface water.

The invention discloses a device and a method for treating low-carbon nitrogen sewage in a synchronous anaerobic ammonia oxidation and anaerobic methane oxidation mode, belonging to the technical field of sewage treatment. The device mainly comprises a sewage anaerobic methanogenesis reactor, a sludge anaerobic digestion tank, a synchronous anaerobic ammonia oxidation and anaerobic methane oxidation reactor, a partial nitrification reactor, a water intake pool and a water outtake pool, wherein anaerobic digestion sludge is respectively inoculated to the sewage anaerobic methanogenesis reactor and the sludge anaerobic digestion tank; and cultured and domesticated anaerobic ammonia oxidation and denitrification type methane anaerobic oxidized bacterium symbiotic bacteria flora sludge is inoculated to the synchronous anaerobic ammonia oxidation and anaerobic methane oxidation reactor, and cultured and domesticated partial nitrification sludge is inoculated to the partial nitrification reactor, so as to carry out sewage treatment. By utilizing the device and the method, the problems that the organic carbon source is insufficient and the ratio of C to N is low in sewage denitrification treatment are solved.

The invention discloses a low-oxygen aerating control device and method of segment inlet A / O biological denitrifying technique, which contains three control circuits, wherein the first and second circuits adopt DO cascade PI control system; the third circuit uses higher-precision ammonia nitrogen feedforward-feedback control system, which gathers DO density, ammonia nitrogen density of aerobic area and ammonia nitrogen density of last anoxybiotic area to reflect the change of inlet load.

The invention discloses an effluent treatment control system and on-line control method of A / O craft short distance nitrated and antinitrated, which is characterized by the following: the domestic sewage is used as dealing object at normal temperature; the DO sensor and pH sensor are installed in aerobic pool; the ORP sensor is set up in anoxic tank; the internal recycle sensor controls inner loop reflux quantity of system dynamically; the aeration quantity controls the aeration quantity of kinetic control system; the aeration quantity and inner loop reflux quantity are changed limberly according to water quality of inflow and water outlet; the level or nitration and anti-nitration are held accurately. The invention simplifies the craft, which reduces the cost.

The present invention relates to an A2 / O oxidation channel process synchronous nitrification and denitrification control method and its equipment, belonging to the field of domestic sewage biodenitrogenation technology. It is characterized by that said method includes the following steps: utilizing DO on-line monitoring apparatus to monitor the macroscopic aerobic-anoxic environment formed in oxidation channel aeration basin; utilizing ORP on-line monitoring apparatus to monitor the microscopic aerobic-anoxic environment formed in oxidation channel aeration basin; and utilizing computer to control frequency conversion air blower to control aeration quantity so as to ensure that the macroscopic and microscopic nitrification reaction and denitrification reaction can be simultaneously implemented.

The invention belongs to the field of environment protection and discloses a membrane bioreactor for denitrification and waste water denitrification method thereof. The membrane bioreactor is divided into a first anoxic pond, an aerobic pound, a second anoxic pound, an anaerobic pond and a membrane pound by a vertical deflecting baffle plate and an aeration device, wherein the ponds are five independent and communicated reactor chambers; after waste water enters the process, the biochemical treatment processes such as the degradation, nitrification and denitrification of organic matters are completed under the action of microorganisms; and effluent is obtained by membrane filtration and pumping. The bioreactor and the method have the advantages that: sludge mixed liquid flows in a piston flow mode in the whole system, but is in a fully mixed state in a single cell and a refluxing device is used, so the degree of mixing in the entire reactor is high and the mass transfer effect is good; under a condition of not adding extra carbon source, the process strengthens the denitrification by using high sludge concentration, so deep denitrification treatment is realized and the pollution to the membrane is relieved; and at the same time, due to the high efficiency trapping and separation characteristic of the membrane, the quality of effluent of filtration is high.

The invention creatively provides a method for strengthening nitrogen and phosphorus removal by using the hydrolysis and fermentation of mixed sludge of a sewage plant. According to the method, part of activated sludge returns to a primary sedimentation tank and is mixed with primary sedimentation sludge, so as to be subjected to precipitation and concentration, the precipitated and concentrated mixed sludge enters a hydrolysis tank which can consist of a separate reactor and can also consist of two series reactors, and is subjected to hydrolysis and fermentation in the hydrolysis tank, so as to produce easily-degradable organic matters (rbCOD) or volatile fatty acids (VFAs), and after the process is completed, a hydrolyzed mixed solution which is rich in VFA, or supernatant is introduced into an anaerobic tank or anoxic tank of a biological pool, thereby realizing the aim of strengthening nitrogen and phosphorus removal. The method provided by the invention has the advantages that the carbon source insufficiency of inlet water can be effectively improved, the biological nitrogen and phosphorus removal function can be strengthened, and the addition of an external commercial carbon source is reduced or canceled; the method is applicable to the new construction of sewage plants and is also applicable to the upgrading and reconstruction of the existing sewage plants.

The invention provides a landfill leachate processing process. Landfill leachate sequentially passes through a pretreatment system, a main body biological treatment system and a deep treatment system; the pretreatment system consists of a regulating pool, an adsorption pool and a coagulating pool; wastewater is pretreated sequentially through the devices; outlet water enters the main body biological treatment system; the main body biological treatment system comprises an anaerobic EGSB (expanded granular sludge bed) reactor, an A / O short-range nitratlon reaction pool and an anaerobic ammonia oxidation UASB (upflow anaerobic sludge blanket) reactor; the treatment devices perform real-time regulation control through a PLC (programmable logic controller) control system for denitrification decarbonization reaction; the outlet water enters the deep treatment system for further treatment; the deep treatment system comprises a secondary coagulating pool, a primary homogeneous catalysis ozone oxidation reaction pool, a MBR (meane biological reactor) secondary biological reaction pool and a secondary homogeneous catalysis ozone oxidation reaction pool; finally, organic matters, total nitrogen and ammonia nitrogen of the outlet water reach the discharge standard. The landfill leachate processing process has the advantages that efficient denitrification and carbon removal are realized; the energy is saved; the consumption is reduced; the operation is stable; meanwhile, the goal of zero concentrated liquid generation is realized.

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 relates to a rapid nitrogenous wastewater biological treatment process, particularly to a method for rapidly realizing short distance deep denitrogenation by SBR process. The prior short distance biological denitrogenation technique is not suitable for treating wastewater with low C / N ratio. The inventive method comprises the steps of feeding water, aerating, adding equal amount of raw wastewater, aerating, adding equal amount of raw wastewater, aerating, adding external carbon source, aerating, settling, draining, and idle running. The temperature in the overall process is controlled at 30-33 DEG C, the water dissolved oxygen concentration during nitration stage is controlled in the range of 0.8-1.2 mg / L, the mean sludge retention time in the system is 12-15 days, and the aeration amount and the denitrification time of the short distance deep denitrogenation by SBR process is controlled based on the change feature of online parameter pH value. The inventive method has the advantages of good denitrogenation effect, high degree of automation, low energy consumption, convenient operation, low cost, and suitability for treatment of wastewater with low C / N ratio.

The invention creatively provides a method for strengthening nitrogen and phosphorus removal by using the hydrolysis and fermentation of mixed sludge of a sewage plant. According to the method, part of activated sludge returns to a primary sedimentation tank and is mixed with primary sedimentation sludge, so as to be subjected to precipitation and concentration, the precipitated and concentrated mixed sludge enters a hydrolysis tank which can consist of a separate reactor and can also consist of two series reactors, and is subjected to hydrolysis and fermentation in the hydrolysis tank, so as to produce easily-degradable organic matters (rbCOD) or volatile fatty acids (VFAs), and after the process is completed, a hydrolyzed mixed solution which is rich in VFA, or supernatant is introduced into an anaerobic tank or anoxic tank of a biological pool, thereby realizing the aim of strengthening nitrogen and phosphorus removal. The method provided by the invention has the advantages that the carbon source insufficiency of inlet water can be effectively improved, the biological nitrogen and phosphorus removal function can be strengthened, and the addition of an external commercial carbon source is reduced or canceled; the method is applicable to the new construction of sewage plants and is also applicable to the upgrading and reconstruction of the existing sewage plants.

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 an aeration method for improving film pollution control function and an application thereof in the film separation process, belonging to the water treatment technology and film separation technology application field. The aeration method in the invention is that big single bubbles are produced intermittently in aeration by an aeration device; the shearing force on the film surface and the mass transfer efficiency by the big bubbles are obviously higher than the small bubbles produced in ordinary free aeration. The invention aims to provide a film pollution aeration control method realizing low energy consumption and high efficiency, further improve the film pollution control function and the film separation selectivity and effect, reduce the aeration energy consumption, lessen the film cleaning times and cost and improve the service life of film component.

The invention relates to a system and method for enhanced nitrogen removal of sewage through denitrification. The system for enhanced nitrogen removal of sewage through denitrification comprises an anaerobic pool, an anoxic pool, an aerobic pool and a secondary sedimentation pool which are in successive connection. The system further comprises a control system, wherein the control system is connected with an aeration system and a carbon source feeding system; the control system controls the aeration of an aerator so as to allow the DO concentration of the aerobic pool to be 0.5 to 2.9 mg / L andthe ammonia nitrogen concentration of an effluent to be 0.5 to 1.5 mg / L; the carbon source feeding system comprises a nitrate nitrogen on-line monitor and a carbon source feeding device; the nitratenitrogen on-line monitor feeds a nitrate nitrogen concentration back to the control system; and when the nitrate nitrogen concentration of the effluent of the aerobic pool is higher than the set valueof 10 mg / L, the control system controls the carbon source feeding device to feed 5 to 7 units of a carbon source per unit of nitrate into the anoxic pool. According to the invention, intermittent aeration of a sewage treatment plant is realized, so the effluent stably reaches the standard, and energy consumption in aeration is saved; meanwhile, highly-efficient nitrogen removal is realized through accurate chemical feeding in an anoxic area by using the carbon source feeding system according to the nitrate nitrogen concentration of the effluent, so energy consumption in aeration can be saved,and the DO concentration of a reflux liquid is reduced; and the carbon source is accurately added according to the nitrate nitrogen concentration, so highly-efficient denitrification is realized, andthe cost of the carbon source is saved.

The invention provides a method for controlling the aeration quantity of a membrane tank. The method comprises the following steps of: calculating the permeability of each water producing period, the permeability each day and the change rate of the current permeability according to the data of membrane flux and transmembrane pressure difference acquired in real time; setting the reference value of the permeability change rate and calculating the ratio of the current permeability change rate to the reference value of the permeability change rate; and determining the ratio of the current permeability change rate to the reference value of the permeability change rate so as to adjust the aeration quantity. The invention also provides a system for implementing the method; and the system comprises a pressure gauge, a flowmeter, an aeration flow control device, a transducer, a blast blower and an aerator pipe, wherein the pressure gauge and the flowmeter are both connected with the aeration flow control device; and the aeration flow control device is orderly connected with the transducer, the blast blower and the aerator pipe. According to the invention, the purpose of reducing the aeration energy consumption of the membrane tank is achieved by regulating and controlling the aeration quantity required by aeration of the membrane tank with the change trend of the permeability of the membrane as a control parameter.

The invention belongs to the technical field of environmental protection, in particular to an optimizing and designing method of the AAO process aeration amount, which comprises the following steps of: firstly, analyzing components of water quality of sewage; secondly, designing other process parameters except for the aeration amount in the AAO process by adopting an empirical method; thirdly, establishing an AAO process model by using simulation software; fourthly, setting main parameters of the AAO process model according to the results of the first step and the second step; fifthly, adjusting the distribution of the aeration amount along the length direction of an aeration pool; and sixthly, calculating the aeration amount in the stable state so as to meet designing conditions. The method can be used for designing the AAO process aeration amount, can effectively save the energy consumption for aeration by over 12 percent and reduce the operation cost of the system.

A device and a method for realizing deep nitrogen removal of urban domestic sewage by shortcut nitrification-anaerobic ammoxidation coupled denitrification belong to the field of biological sewage treatment. The device comprises a raw water tank, a shortcut nitrification reactor, an adjusting water tank, an anaerobic ammoxidation coupled denitrification reactor and an effluent water tank. A part of domestic sewage enters the shortcut nitrification reactor, and undergoes an ammoxidation reaction, and then effluent water rich in NO2-N enters an intermediate water tank; the remaining domestic sewage is mixed with the effluent water of the shortcut nitrification reactor, and then enters the anaerobic ammoxidation coupled denitrification reactor, and NH<4+>-N in the domestic sewage and the NO2-N generated by the shortcut nitrification are removed through anaerobic ammoxidation; and organic matters in the domestic sewage are utilized by denitrifying bacteria to remove NO3-N generated by theanaerobic ammoxidation reaction. The device and the method improve the denitrification efficiency by fully utilizing the organic matters in the domestic sewage so efficient and energy-saving deep nitrogen removal of the urban sewage is realized.

The invention belongs to the field of biological treatment of sewage and discloses a device and a method for treating urban domestic sewage by coupling of short-cut nitrification anaerobic ammonium oxidation and denitrification treatment. The device mainly comprises a short-cut nitrification anaerobic ammonium oxidation and denitrification coupled SBR reactor. In a first stage which is a high-ammonia-nitrogen reinforcement stage, ammonia nitrogen is added into the urban domestic sewage to obtain high-ammonia-nitrogen low-carbon-nitrogen-ratio sewage which then enters the SBR reactor, short-cut nitrification anaerobic ammonium oxidation is mainly realized through low-oxygen aeration, and high total nitrogen removal load is finally realized by high-ammonia-nitrogen reinforcement of main functional bacteria namely ammonium oxidation and anaerobic ammonium oxidation bacteria. In a second stage which is a transition stage, influent ammonia-nitrogen concentration reduction and low-oxygen aeration are carried out. In a third stage which is an urban domestic sewage treatment stage, anaerobic stirring, low-oxygen aeration and anoxic stirring are performed respectively to realize removal of total nitrogen and COD in sewage. According to data, compared with integrated sewage directly used for urban domestic sewage treatment, integrated sewage subjected to high-ammonia-nitrogen reinforcement has advantages of stable nitrogen removal effects and energy saving and consumption reduction due to low-oxygen aeration in the aeration stage.

The invention discloses a fungus and algae rotary bio-membrane reactor system based on denitrification and phosphorus removal and application. Algae cells adhered to an adherent wall are fixed on a rotatable device, and rotate in waste water rich in nutrient substances and air rich in CO2, and when a microalgae membrane grows to a certain thickness, the microalgae membrane is harvested through a scraper to serve as a microalgae fertilizer, so that the microalgae harvesting cost can be reduced, and the economic benefit is improved. The rotary bio-membrane reactor system mainly comprises an active sludge system and a rotary algae bio-membrane system; on the basis of a traditional active sludge technology, a microalgae waste water treatment system is integrated, the nutrients such as COD, N and P inside waste water are removed efficiently, simultaneously the growth of microalgae can be promoted through CO2 generated by microbial metabolism inside active sludge, microalgae photosynthesis is used for providing O2 for microorganisms and partially reducing aeration cost, and the quantity of excess active sludge can be partially reduced due to the existence of microalgae.

The invention relates to an improved UCT step-feed efficient biological denitrification and dephosphorization device based on the DEAMOX technology and an application method and belongs to the technical field of biological sewage treatment.The technical problems of high energy consumption and high carbon source adding in a common low-carbon-source urban sewage treatment process are solved through the organic matter type denitrification ammoxidation technology.The device mainly comprises an urban sewage raw water tank, an improved UCT step-feed device and a settling pond.After inoculation of activated sludge is carried out to start the improved UCT step-feed process of an activated sludge system, a second-segment anoxic reactor and a third-segment anoxic reactor are inoculated with Anammox sponge filler, and efficient denitrification and dephosphorization of low-carbon-source urban sewage are achieved by adjusting the water intake ratios of all segments, inflow water C / N and the actual anoxic zone hydraulic retention time and enhancing the denitrification ammoxidation technology of the system.The dosage of an organic carbon source is greatly reduced while aeration energy consumption is saved, and the disposal cost of residual sludge is reduced.

The invention discloses a sewage treatment system and technology combining separated type anaerobic membrane biology and a membrane distillation technology. The sewage treatment system comprises a water inlet pool, an anaerobic membrane bioreactor, a membrane distillation system, a water discharge pool and a programmable logic main control system, wherein the water inlet pool is connected to the anaerobic membrane bioreactor by virtue of a first water pipe; a water inlet pump is arranged on the first water pipe; the anaerobic membrane bioreactor is connected to the membrane distillation system by virtue of a second water pipe; the second water pipe is provided with a vacuum manometer and a peristaltic pump; the membrane distillation system is connected to the water discharge pool by virtue of a fifth pipe; and the programmable logic main control system is connected to the whole sewage treatment system in a controlling manner. According to the sewage treatment system and technology combining separated type anaerobic membrane biology and the membrane distillation technology, the problems that removal of organisms, phosphorus, nitrogen and the like in the discharged water of an existing anaerobic membrane bioreactor is not thorough, the national emission standard cannot be reached, and the energy consumption and cost for subsequent advanced treatment such as reverse osmosis are high are solved.

The invention provides an integrated whole autotrophic nitrogen removal device and belongs to the technical field of biological nitrogen removal of wastewater. The device comprises a reaction device body, wherein a granular sludge chamber and an anaerobic sludge-biomembrane chamber are arranged in the body, a water feeding and distributing device, an aeration pipe and a partition board are sequentially arranged in the granular sludge chamber from bottom to top, a filler suspending layer, a filler stacking layer and a water outlet chamber are formed in the anaerobic sludge-biomembrane chamber from top to bottom, the anaerobic sludge-biomembrane chamber surrounds the outer side of the granular sludge chamber, the partition board is arranged in the middle of the granular sludge chamber, a gas-collecting hood is arranged at the upper part, a first gas outlet is formed in the gas-collecting hood, an annular overflow port communicated with the anaerobic sludge-biomembrane chamber is formed in the upper part of the inner wall of the granular sludge chamber, a buffer and a water distributor are connected to the upper part of the inner wall of the anaerobic sludge-biomembrane chamber, and asecond gas outlet is formed in the top. The device can be started in a short time, can effectively intercept sludge to create aerobic and anaerobic environments and improve the system biomass and diversity, occupies little floor space and is good in water treatment effect.

The invention provides a membrane bioreactor and a water treatment control method thereof. A cleaning system is additionally arranged in the membrane bioreactor to clean a membrane component; a computer system is used for controlling the on / off of an aeration pump according to a dissolved oxygen concentration signal output by a dissolved oxygen sensor and controlling the on / off of a water outflowpump, an electrically controlled water outflow valve and the cleaning system according to a water pressure signal output by a pressure sensor, so that the water treatment control process is highly automated, operators only need to set corresponding parameters, and the use and operation are more simple and convenient; and the membrane bioreactor provided by the invention can carry out the cleaningtreatment on the membrane component without the need of aeration, can reasonably control the on / off of the aeration pump according to the concentration of the dissolved oxygen in water to reduce the aeration energy consumption and avoid the energy consumption increase because of persistent large-power aeration of the aeration pump, and can simultaneously control the cleaning process reasonably according to the pumping water pressure to avoid the water pump energy consumption increase caused by overhigh membrane resistance pressure of the membrane component and effectively control the water generation energy consumption cost.

The invention relates to the technical field of sewage treatment, and in particular relates to a sewage management platform based on sewage biochemical treatment optimization and fine aeration. The platform comprises a data receiving module, a database, a prediction module, a model building module, a model parameter setting module, a model correction module, a process model library, a plan simulation module, a decision module and a control module. The data receiving module is used to receive parameter information uploaded by each sewage treatment plant. The database is used for storing the parameter information. The prediction module is used for predicting the change trend of each state parameter of sewage. The process model library stores the process model of each sewage treatment plant.The plan simulation module is used to carry out plan simulation on each sewage treatment plant under the influence of external disturbances and generate a control plan model. The sewage management platform based on sewage biochemical treatment optimization and fine aeration can optimize process parameters, realizes fine management of sewage treatment processes, and reduces the power consumption ofthe treatment processes.

The invention discloses a control method for realizing nitrosation-denitrosation of ammonia nitrogen wastewater at a low temperature by a sequencing batch reactor (SBR) method. Based on the conventional facultative anaerobic-aerobic intermittent activated sludge method, pH, oxidation-reduction potential (ORP) and dissolved oxygen (DO) are used as real-time monitoring parameters to establish an automatic control system in the method. The oxidation of nitrite is suppressed by controlling concentration of free ammonia (FA) in a reactor system at the temperature of between 10 and 18 DEG C, or the aeration time is optimally controlled according to an ammonia valley point on a pH real-time curve, so that high-concentration ammonia nitrogen wastewater is treated by nitrosation-denitrosation. By the method, the nitrosation rate can reach 80 percent, and the removal rates of TN, NH3-N and chemical oxygen demand (COD) reach over 95 percent, 99 percent and 90 percent respectively.

The invention discloses a method and a device for controlling synchronous nitration and denitrification in a surface aeration oxidation ditch process, and relates to the technical field of biological denitrification of domestic sewage. The conventional surface aeration oxidation ditch process has the problems that removal rate of total nitrogen is low, energy consumption is high, and environment of synchronous nitration and denitrification is hardly controlled. Dissolved oxygen (DO) and ammonia nitrogen at the water outlet of an oxidation ditch aeration basin are monitored by DO and ammonia nitrogen on-line monitors, the turn-on and turn-off of a reverse umbrella surface aerator and a water impeller are controlled by indication of an on-line instrument, organic matter in the aeration basin is oxidized by fully using nitrate nitrogen, excessive aeration is avoided simultaneously, and double aims of energy saving and high-efficiency denitrification are fulfilled.

The invention discloses an aeration and carbon source addition optimization control system and method for a mud film composite sewage treatment process, and is mainly applied to a continuous flow municipal sewage treatment process. The control system comprises an online monitoring system, an aeration system, an aeration PLC control system, a carbon source adding system and a carbon source adding PLC control system. On-line monitoring data of inlet water of a biochemical pool is collected as a feedforward parameter, on-line monitoring data of the biochemical pool along the way is collected as aprocess parameter, on-line monitoring data of the tail end of the biochemical pool is collected as a feedback parameter, and a neural network algorithm is utilized to obtain a reduction and optimization aeration and carbon source addition control strategy. The system and the method are suitable for different water inlet load conditions, especially for low water inlet load conditions, aeration energy consumption and external carbon source chemical consumption are reduced, and it is guaranteed that effluent of COD, TN and NH4-N reaches the standard. The system and the method are suitable for sewage treatment plants of various scales and upgraded and reformed sewage treatment plants; according to the method, the energy-saving and consumption-reducing effects and the carbon source adding effect are obvious, and large energy-saving and consumption-reducing benefits and carbon source adding amount reducing benefits can be obtained through slight transformation according to the automatic control condition of a water plant.

A rotary brush type membrane bioreactor for water treater is composed of the membrane unit consisting of water permeable hydrophilic membrane unit and aerating hydrophobic membrane unit, the rotary brush consisting of speed-adjustable motor, basic frame, and brush, and the bioreactor. Said hydrophilic membrane unit comprises membrane and water collecting tubes. Said hydrophobic membrane unit comprises membrane wires and aerating tubes.

The present invention discloses an integrated IODS reactor. According to the integrated IODS reactor, an anoxic zone, an aerobic zone and a precipitation zone form a parallel three-gallery form arranged on one end of the reactor, a pre-denitration and selection zone and an anaerobic zone are arranged on the other end of the reactor, and all function zones are cleverly and compactly arranged inside an integrated structure. According to the present invention, sewage enters the reactor by using a segmented entering manner, one part of the sewage and reflux sludge enter the pre-denitration and selection zone so as to be subjected to a complete contact reaction, and then enter the anaerobic zone, the other part of the sewage directly enters the anaerobic zone, the anaerobic zone sewage enters the starting end of the anoxic zone through the through hole wall, a first circulation (denitrogenation circulation) is formed between the anoxic zone and the aerobic zone through the circulation power provided by an air plug flow zone, a second circulation (precipitation circulation) is formed between the aerobic zone and the precipitation zone through the circulation power provided by the air plug flow zone, and the treated effluent is discharged out of the reactor from the precipitation zone.

The invention discloses a device and a method for treating low-carbon-nitrogen-ratio wastewater by coupling continuous flow AOA short-cut nitrification and anaerobic ammonia oxidation with sludge fermentation denitrification, and belongs to the field of biological sewage treatment. The device comprises a raw water tank, a continuous flow AOA reactor, a sedimentation tank, a sludge fermentation tank and a sludge storage tank. One part of domestic sewage enters an anaerobic section of the continuous flow reactor to store an internal carbon source and then enters an aerobic section to complete ashort-cut nitrification reaction, then effluent rich in NO2N enters an anoxic section, the other part of raw water is mixed with a returned sludge fermentation product and then enters the anoxic section, and NH4+-N and NO2--N are removed under the effect of a fixed anaerobic ammonia oxidizing bacteria filler; and NO3--N generated by anaerobic ammonia oxidation reaction is removed through denitrification, and residual sludge is fermented and then enters an intermediate sludge storage tank to be continuously added to an anoxic zone to provide a carbon source for denitrification. According to themethod, raw water and organic matters generated by sludge fermentation are fully utilized, the denitrification efficiency is improved, sludge reduction is facilitated, and deep denitrification of themunicipal domestic sewage with a low carbon-nitrogen ratio is realized.