34 results about "Endogenous respiration" patented technology

A membrane supported biofilm reactor uses modules having fine, hollow fibres, for example, made from melt spun thermoplastic polymers treated after spinning to increase their permeability to oxygen, used, for example, in tows or formed into a fabric. In one module, one or more sheets of the fabric are potted into a module to enable oxygen containing gas to be supplied to the lumens of the hollow fibres. Various reactors and processes, for example to treat wastewater, using such modules are described. In one process, oxygen travels through fibers, optionally through an attached biofilm, to oxygenate surrounding water. Mechanical, chemical and biological methods, for example endogenous respiration, are used to control the thickness of the biofilm.

A membrane supported biofilm reactor uses modules having fine, hollow fibers, for example, made from melt spun thermoplastic polymers treated after spinning to increase their permeability to oxygen, used, for example, in tows or formed into a fabric. In one module, one or more sheets of the fabric are potted into a module to enable oxygen containing gas to be supplied to the lumens of the hollow fibers. Various reactors and processes, for example to treat wastewater, using such modules are described. In one process, oxygen travels through fibers, optionally through an attached biofilm, to oxygenate surrounding water. Mechanical, chemical and biological methods, for example endogenous respiration, are used to control the thickness of the biofilm.

A membrane supported biofilm reactor uses modules having fine, hollow fibres, for example, made from melt spun thermoplastic polymers treated after spinning to increase their permeability to oxygen, used, for example, in tows or formed into a fabric. In one module, one or more sheets of the fabric are potted into a module to enable oxygen containing gas to be supplied to the lumens of the hollow fibres. Various reactors and processes, for example to treat wastewater, using such modules are described. In one process, oxygen travels through fibers, optionally through an attached biofilm, to oxygenate surrounding water. Mechanical, chemical and biological methods, for example endogenous respiration, are used to control the thickness of the biofilm.

A membrane supported biofilm reactor uses modules having fine, hollow fibres, for example, made from melt spun thermoplastic polymers treated after spinning to increase their permeability to oxygen, used, for example, in tows or formed into a fabric. In one module, one or more sheets of the fabric are potted into a module to enable oxygen containing gas to be supplied to the lumens of the hollow fibres. Various reactors and processes, for example to treat wastewater, using such modules are described. Mechanical, chemical and biological methods, for example endogenous respiration, are used to control the thickness of the biofilm.

A membrane supported biofilm reactor uses modules having fine, hollow fibres, for example, made from melt spun thermoplastic polymers treated after spinning to increase their permeability to oxygen, used, for example, in tows or formed into a fabric. In one module, one or more sheets of the fabric are potted into a module to enable oxygen containing gas to be supplied to the lumens of the hollow fibres. Various reactors and processes, for example to treat wastewater, using such modules are described. Mechanical, chemical and biological methods, for example endogenous respiration, are used to control the thickness of the biofilm.

The invention discloses a judgment method and regulation and control method for the growth states of activated sludge. The judgment method includes the steps that the endogenous respiration rate OURe of the activated sludge is measured, a nitrogen containing solution or an autotrophic bacterium restraining solution and a carbon and nitrogen containing solution are added, the autotrophic bacterium respiration rate OURN and heterotrophic bacterium respiration rate OURC of the sludge are measured respectively, after the final autotrophic bacterium respiration rate OURA and the final heterotrophic bacterium respiration rate OURH are calculated, logarithms are taken respectively, an InOURA-time reciprocal diagram and an InOURH-time reciprocal diagram are drawn, and whether the growth states of two kinds of a logarithm increasing phase and a non-logarithm increasing phase are achieved or not is judged. The regulation and control method includes the steps that the quasi endogenous respiration rate OURme, the endogenous respiration rate OURe and the sludge nitrogen-added respiration rate OURN are measured respectively; a characteristic diagram is drawn, the growth state of autotrophic bacteria gets into the logarithm increasing phase by controlling alkalinity, and the growth state of heterotrophic bacteria gets into the logarithm increasing phase by increasing the volume of the sludge or the matrix adding quantity. The novel effective method is provided for judgment and regulation of the sludge growth situations of a sewage treatment plant.

The invention discloses an analogy method based on an activated sludge purification process of a HPP lattice gas cellular automaton model, comprising the following steps: setting up a corresponding initial model in an activated sludge system and initializing a cellular state; setting a boundary point; and ensuring an evolution rule according to the initial model. The method comprises the reaction process of particles; and the reaction process comprises particle absorption, particle catabolism, particle anabolism and endogenous respiration. Based on an artificial life system and the HPP lattice gas cellular automaton model, the invention designs the evolution rule of an activated sludge cell automaton and realizes the evolution, simulates a circumstance that microorganism absorbs and decomposes organic matters, well simulates the logarithmic phase, the decelerating grow phase and the endogenous respiration phase of an activated sludge growth model curve, well simulates the degradation curve of BOD organic matters, and has a directive function for further recognizing and understanding the saprobia settlement process.

The invention relates to a high dissolved oxygen generation device. The high dissolved oxygen generation device comprises an oxygen tank and an air inlet pipe, and is characterized in that one end of a variable-frequency high-pressure pump or a diaphragm pump is connected with one end of a low-pressure dissolved oxygen inlet pipe, the other end of the variable-frequency high-pressure pump or the diaphragm pump is connected with a high-pressure dissolved oxygen outlet pipe extending into a pressure tank, and a flat spray nozzle is mounted at the tail end of the high-pressure dissolved oxygen outlet pipe in the pressure tank; and an ultra-micro bubble dissolved oxygen outlet pipe is arranged at the bottom of the pressure tank, one end of the ultra-micro bubble dissolved oxygen outlet pipe extends into the bottom of the pressure tank, a valve is arranged at the tail end of the other end of the ultra-micro bubble dissolved oxygen outlet pipe, and the other end of the ultra-micro bubble dissolved oxygen outlet pipe is further connected with other devices or parts. The high dissolved oxygen generating device disclosed by the invention can not only solve the problem of low oxygen dissolution efficiency of a traditional oxygen-increasing way, but also prevent oxygen from escaping due to oversaturation and improve sewage treatment efficiency; and furthermore, the endogenous respiration effect of microbes can be improved, so that the high dissolved oxygen generation device can reduce the generation of residual active sludge during sewage treatment and degrade bottom sludge in ponds, lakes and reservoirs, and further has extensive social effects and economic benefits.

The invention discloses a method for treating black odorous water by adopting MBBR combined process and belongs to the field of sewage treatment. The method comprises the following steps: a bottom sediment suction pump outside a pool pumps bottom sediment of black odorous water into an anaerobic fermentation / anoxic tank, the black odorous water and returned sludge pumped from a settling pond by asludge reflux pump are mixed and are subjected to anaerobic fermentation and denitrification reaction, or NO3-N carried into the returned sludge is denitrified and removed by denitrifying bacteria through a carbon source generated through sludge fermentation and microorganism endogenous respiration; mud water subjected to anaerobic fermentation / anoxic pond reaction flows into the aerobic pond through an upper MBBR overflow hole, and meanwhile, water on the upper part outside the pool is lifted and black odorous water on bottom sediment in the black odorous water is pumped into MBBR and flows into the aerobic pond, and organic matters are removed and ammonia nitrogen is nitrified into NO3-N by a biological membrane and suspending active sludge on an efficient suspension carrier in the MBBRaerobic pond; the mud water after reaction in the MBBR aerobic pond automatically flows into the settling pond for mud and water separation through an intercepting suspension carrier effluent screen on the upper part of the water draining edge of the MBBR aerobic pond, and clean water returns into the water. According to the invention, the design is reasonable, the technique is advanced and the deep treatment for the black odorous water and the bottom sediment sludge of the black odorous water in a treatment device system can be realized.

The invention relates to an improved A / O (anaerobic / aerobiotic) technique for treating acrylonitrile wastewater, which is characterized in that an aerobiotic tank of the A / O technique is divided into three parts O1, O2 and O3 of which the retention time ratio is 1:3:2, the O1 region adopts a fixed filler suspension membrane to ensure the sludge concentration of the O1 region to be 5000-8000 mg / L and the sludge load to be 1.5-2.5 kg / (kg.d), and the BOD (biochemical oxygen demand) removal rate can reach 50% above; the sludge load of the O2 region is less than or equal to 0.25 kg / (kg.d), and the nitration efficiency is enhanced; by adopting the suspended spherical filler suspension membrane, the biomembrane has microcosmic oxygen-deficient environment inside, thereby implementing simultaneous nitrification and denitrification and being beneficial to total nitrogen removal; by adopting an activated sludge process in the O3 region, the sludge load is less than or equal to 0.1 kg / (kg.d), so that the nitration is continued and performed thoroughly; and the activated sludge metabolism in the O3 region is in the endogenous respiration period, so that the sludge generation amount of the technique is reduced by more than 40%. The aerobiotic tank is divided into the three regions, and different forms of biochemical processes are adopted for different regions, so that the denitrification efficiency can reach 95% above, thereby lowering the organic nitrogen pollutant content in the acrylonitrile wastewater.

The invention provides a process and automatic control coupled sewage treatment system and an aeration control method thereof. The system comprises an aerobic tank with a mechanical stirring device and an air blower arranged outside the aerobic tank. The air blower is communicated with the aerobic tank through an air main pipe, an air main pipe and an air branch pipe, a valve is arranged on the air branch pipe, an aerator is arranged at the bottom of the aerobic tank and is arranged on the air branch pipe, a dissolved oxygen meter and an ammonia nitrogen meter are arranged in the aerobic tank,a central controller is arranged outside the aerobic tank, the central controller is connected with the dissolved oxygen meter, the ammonia nitrogen meter and the air blower, and the aeration rate ofthe air blower is adjusted according to the ammonia nitrogen real-time value and the dissolved oxygen real-time value. The concentrations of dissolved oxygen and ammonia nitrogen in water in the sewage treatment tank are almost the same, local dissolved oxygen is prevented from being too high, waste of endogenous respiration to a carbon source is reduced as much as possible, the proportion of thecarbon source for nitrogen and phosphorus removal is increased, the biological nitrogen and phosphorus removal effect is improved, and the adding amount of the carbon source and a phosphorus removalagent is reduced. Meanwhile, the aeration energy consumption is also reduced.

The invention provides a method for removing total nitrogen in household garbage leachate. The method comprises denitrification treatment, nitrification and endogenous respiration treatment, wherein the temperature of the denitrification treatment is 30 DEG C; the ratio of C to N in the denitrification treatment is 3:1; and the reflux ratio of the nitrification treatment to the denitrification treatment is 500 percent. The ammonia-nitrogen removal rate of the method can reach more than 98 percent, and the total nitrogen removal rate of the method can reach 90 percent.

The invention discloses an autotrophic bacteria kinetic parameter measurement device and an autotrophic bacteria kinetic parameter measurement method. The device comprises a reaction chamber and a sludge tank, wherein the sludge tank communicates with the top wall of the reaction chamber via an electric valve, and a water bath circulation system is arranged on the surrounding wall of the tank of the reaction chamber; an agitator which extends to the bottom of the tank of the reaction chamber is arranged along the top wall of the reaction chamber, and a pH meter, a dissolved oxygen meter and a level meter are respectively arranged in the reaction chamber; an aerating sand core which communicates with an aerating pump is arranged on the bottom of the reaction chamber; and the electric valve, the agitator, the pH meter, the dissolved oxygen meter and the level meter are respectively connected with a PLC (programmable logic controller) control box, and the PLC control box is respectively connected with the aerating pump and a computer. The method includes the following steps of: (a) aerobic endogenous respiration rate testing stage; (b) oxygen transport coefficient testing stage; and (c) nitration exogenous respiration rate testing stage. By correcting the concentration of saturated dissolved oxygen, recording data and drawing a curve in real time, fitting errors and evaluating fitting quality, the invention realizes the intelligentization of control and value analysis, and is easy to operate.

The invention relates to a novel modified A / O biological denitrification process. The novel modified A / O biological denitrification process is characterized in that an aerobic tank for an A / O process is divided into three parts of O1, O2 and O3; and a residence time ratio of the three parts is O1:O2:O3=1:3:2. In the O1 part, a fixed filler is used to hang a membrane, sludge concentration of the O1 part is between 5,000-8,000 mg / L, sludge load is between 1.5 kg / (kg.d) and 5.5 kg / (kg.d); and BOD removal rate can reach over 50%. In the O2 part, sludge load is smaller than or equal to 0.25 kg / (kg.d); efficiency of nitrification is increased; suspending sphere-shaped filler is used to hang the membrane; a microcosmic anaerobic environment is formed in the biological membrane; and nitrification and denitrification can be realized at the same time, thereby facilitating removal of total nitrogen. In the O3 part, an activated sludge process is employed; sludge load is smaller than or equal to 0.1 kg / (kg.d), so that nitrification can be continuously carried out to make nitrification go thoroughly; and activated sludge metabolism in the region lies in an endogenous respiration period, so that sludge quantity produced by the process is reduced by over 40%. The aerobic tank is divided into segments and different biochemical processes are employed in different segments, so that denitrification efficiency can reach over 95%.

The invention discloses an SBR partial nitrosation process matching anaerobic ammonium oxidation. The SBR partial nitrosation process comprises the following steps: S1, sludge domestication preprocessing: firstly inoculating the sludge, standing and precipitating for 24 hours, wherein a great amount of flotages remain on the upper layer, removing, adding a given amount of test water, performing the stuffy aeration for 48 hours, removing residual organic matters in the sludge by using the endogenous respiration effect of the microorganisms, and finally standing for 24 hours. After the standing,the color of the sludge is changed to sepia, an SV value is determined as 32 percent, the sludge concentration MLSS is 3800mg / L, which shows that the activity of the sludge after the stuffy aerationand standing treatment is already restored, and the inoculation requirement can be met. At the stable operation phase, the removal rate of NH4<+>-N and the accumulation rate of NO2<->-N are respectively up to 90 percent and 80 percent or more.

The invention discloses an A / O / E (anaerobic / aerobic / endogenous respiration) composite treatment system for domestic sewage. The system comprises a sewage separation pool, a biodegradation pool, a biological acidification pool and an oxidation pool, wherein the oxidation pond is communicated with a wetland two-stage treatment unit. The system is capable of thoroughly removing COD (chemical oxygen demand) matters in domestic sewage, and effectively removing organic nitrogen, ammonia nitrogen and phosphorus in domestic sewage by adopting a mode of anaerobic-aerobic combination and wetland two-stage treatment, thus reliably ensuring that the treated water body achieves GB / T18921-2002 'urban sewage recycling water quality standards' of the national regulations; meanwhile, the system has the advantages of being simple in configuration, low in cost, good in social benefits, and the like.

The invention relates to a side flow denitrification technique which can be used in combination with an AAO (anaerobic-anoxic-oxic) technique, a CAST (cyclic activated sludge technology) technique, an oxidation ditch technique with a front end anaerobic region and any other activated sludge treatment technique. When the technique is used in combination with the AAO technique, a sludge discharge pipe of a secondary sedimentation tank is connected with a side flow denitrification tank, the upper part of the side flow denitrification tank is connected with a supernate pipe, and the supernate pipe is connected with an anoxic zone and the secondary sedimentation tank. When the technique is used in combination with the oxidation ditch technique with a front end anaerobic region, a sludge discharge pipe of a secondary sedimentation tank is connected with a side flow denitrification tank, and the upper part is connected with a supernate pipe which is connected with an oxidation ditch and the secondary sedimentation tank. When the technique is used in combination with the CAST technique, a sludge discharge pipe of a main reaction region is connected with a side flow denitrification tank, and a supernate pipe is connected with the main reaction region. The side flow denitrification tank provided by the invention enhances the sludge concentration, and the sludge is subjected to endogenous respiration denitrification, thereby greatly lowering the nitrate amount, reducing the influence of the sludge on the anaerobic section of the biochemical reaction tank or the phosphorus release of the biological selection region of the CAST technique, and enhancing the dephosphorization effect of the system.

The invention discloses a judgment method and regulation and control method for the growth states of activated sludge. The judgment method includes the steps that the endogenous respiration rate OURe of the activated sludge is measured, a nitrogen containing solution or an autotrophic bacterium restraining solution and a carbon and nitrogen containing solution are added, the autotrophic bacterium respiration rate OURN and heterotrophic bacterium respiration rate OURC of the sludge are measured respectively, after the final autotrophic bacterium respiration rate OURA and the final heterotrophic bacterium respiration rate OURH are calculated, logarithms are taken respectively, an InOURA-time reciprocal diagram and an InOURH-time reciprocal diagram are drawn, and whether the growth states of two kinds of a logarithm increasing phase and a non-logarithm increasing phase are achieved or not is judged. The regulation and control method includes the steps that the quasi endogenous respiration rate OURme, the endogenous respiration rate OURe and the sludge nitrogen-added respiration rate OURN are measured respectively; a characteristic diagram is drawn, the growth state of autotrophic bacteria gets into the logarithm increasing phase by controlling alkalinity, and the growth state of heterotrophic bacteria gets into the logarithm increasing phase by increasing the volume of the sludge or the matrix adding quantity. The novel effective method is provided for judgment and regulation of the sludge growth situations of a sewage treatment plant.

The invention provides a multi-cell A<2>O system of sludge anoxic and strengthened fermentation hydrolysis. The system comprises a sludge anoxic cell, a strengthened fermentation hydrolysis cell, an anoxic cell, an aerobic cell and a secondary sedimentation tank, wherein a water inlet pipe is connected with the sludge anoxic cell; the aerobic cell is connected with the anoxic cell through an internal reflux pipeline; and 2 or 3 strengthened fermentation hydrolysis cells, 2 or 3 anoxic cells and 2-4 aerobic cells are provided. By adopting the system provided by the invention, the sludge of the sludge anoxic cell is denitrified through endogenous respiration, and the internal carbon source in sludge is fully used so that more carbon sources are applied to a nitrogen and phosphorus removal biological reaction of the mainstream AAO technology; the nitrate content of the sludge anoxic cell can be reduced to 0, the redox potential in the strengthened fermentation hydrolysis cell is very low, and the effect of anaerobic phosphorus release is improved; and meanwhile, hydrolysis fermentation is performed through a high-concentration sludge layer in the strengthened fermentation hydrolysis cell, macromolecular or refractory organic substances in the inflow water are converted into low-molecular-weight fatty acid, and a high-quality carbon source is provided for the anaerobic phosphorus release and anoxic denitrification reactions.

The invention discloses a percolate treatment method and a percolate treatment device. The percolate treatment method comprises the following steps of: S1, pretreating percolate by virtue of a rough filtration material; and S2, carrying out aftertreatment on the percolate treated by the step S1 by virtue of iron powder and a fine filtration material modified by activated carbon particles. According to the percolate treatment method, the percolate is treated by the rough filtration material as well as the iron powder and the fine filtration material modified by the activated carbon particles, ferric carbon internal electrolysis is carried out between the iron powder and the activated carbon particles, further a small current is produced, decomposition of a refractory organic matter is promoted, endogenous respiration of microorganisms in the filtration materials is enhanced, treatment effect of mineralized refuse for treating the percolate as a filtration material is further enhanced, and removal rate of total nitrogen is increased.

The invention discloses a method for judging the state of microorganisms in a river and selecting purification measures, comprising: taking the suspension of a representative section of the river to analyze the breath pattern, measuring the oxygen consumption rate OUR value; measuring the three-dimensional concentration of dissolved organic matter in each representative section Fluorescence spectrum; divide the three-dimensional fluorescence spectrum into five areas according to the peak position, select the peak T representing the protein-like, the ratio of on-site respiration OURs / OURt and the ratio of endogenous respiration OURe / OURt; draw a bubble diagram, and divide the plane of the bubble diagram into There are 4 areas, different areas correspond to different microbial health conditions and pollution levels and different enhanced purification measures. The invention discloses a method for judging the microbial status of rivers and selecting purification measures. The method of the invention establishes a comprehensive evaluation method for the microbial state and pollution state of the river and the enhanced purification measures. Provide theoretical basis and technical support for strengthening river ecological management.

There are disclosed a continuous, quick measurement method of BOD and an apparatus therefor. It comprises a sample tank in which a sample is prepared suitably for the measurement, a reactor in which microorganisms maintain their activity, a medium reservoir which contains nutrients for the growth of the microorganisms, pumps for transferring liquids, and a microprocessor which controls the operation of all means including a magnetic stirrer for mixing the liquid in the reactor and diagnoses of the apparatus itself. Using the apparatus, the method comprises a continuous culture stage, an endogenous respiration stage, a endogenous respiration rate-measuring stage, a sample feeding stage and a BODq measuring stage. The apparatus can detect BOD in one hour and is very low in error rate. Further, because microorganisms can be continuously cultured, the apparatus is semi-permanent, easy to manage, low in cost and suitable to be operated at treatment site.

The invention discloses a treatment method for an enzyme product applied to sludge reduction. Enzymes are added to a water inlet pipe of a sewage treatment system, so that anaerobes in sewage are converted into aerobes, and CO2 is generated; a large amount of hydrolyzed extracellular enzymes are generated through the added enzymes, and macromolecular organic matter in sludge are decomposed into micromolecular organic matter through the hydrolyzed extracellular enzymes; and linking oxygen is released, and the micromolecular organic matter is utilized by various microorganisms. According to themethod, the enzymes are adopted, and a biological cytolytic technology is utilized; and food chains in the sludge are improved, and the capture capability of protozoa to the microorganisms in the sludge is improved so that the sludge is reduced. The treatment method is applicable for endogenous respiration of activated sludge, and the generation of excess sludge can be reduced; and species of filamentous bacteria can be reduced, and the configuration cost and operation cost of a sludge treatment device are reduced.

The invention relates to a flue gas desulfurization waste liquid treatment and activated sludge reduction treatment method, belonging to the field of environmental protection. Excess activated sludge from a sewage treatment plant is introduced into a flue gas desulfurization waste liquid oxidation treatment device. Sulfite in wastewater is converted into sulfate under the action of the activated sludge, and meanwhile, the activated sludge is in the endogenous respiration state, and can acquire energy by self-consumption, thereby implementing activated sludge reduction. The invention can be implemented only by laying one pipeline and introducing a right amount of excess activated sludge from the sewage treatment plant into the flue gas desulfurization waste liquid oxidation device; and therefore, the technique is simple, and is especially suitable for enterprises in which a sewage treatment plant and a flue gas desulfurization facility are simultaneously constructed.

The invention discloses a biological removal method of the acute biological toxicity in an ozonation process. The method comprises the steps that a mixed liquid from an aeration tank of a sewage treatment plant is obtained and subjected to aeration, so that the mixed liquid comes into an endogenous respiration stage; afterwards, the mixed liquid is mixed with high-acute-biological-toxicity waste water generated through ozonation, nitrogen, phosphorus and trace elements are added, shake culture is conducted at room temperature, and removal of the acute toxicity generated in the ozonation process is achieved. According to the method, the sludge in the endogenous respiration stage has a good removal effect on the highly acute biological toxicity generated in the ozonation process, and the treated sludge has a higher metabolic activity on a non-malignant substrate.

The invention relates to a high dissolved oxygen generation device. The high dissolved oxygen generation device comprises an oxygen tank and an air inlet pipe, and is characterized in that one end of a variable-frequency high-pressure pump or a diaphragm pump is connected with one end of a low-pressure dissolved oxygen inlet pipe, the other end of the variable-frequency high-pressure pump or the diaphragm pump is connected with a high-pressure dissolved oxygen outlet pipe extending into a pressure tank, and a flat spray nozzle is mounted at the tail end of the high-pressure dissolved oxygen outlet pipe in the pressure tank; and an ultra-micro bubble dissolved oxygen outlet pipe is arranged at the bottom of the pressure tank, one end of the ultra-micro bubble dissolved oxygen outlet pipe extends into the bottom of the pressure tank, a valve is arranged at the tail end of the other end of the ultra-micro bubble dissolved oxygen outlet pipe, and the other end of the ultra-micro bubble dissolved oxygen outlet pipe is further connected with other devices or parts. The high dissolved oxygen generating device disclosed by the invention can not only solve the problem of low oxygen dissolution efficiency of a traditional oxygen-increasing way, but also prevent oxygen from escaping due to oversaturation and improve sewage treatment efficiency; and furthermore, the endogenous respiration effect of microbes can be improved, so that the high dissolved oxygen generation device can reduce the generation of residual active sludge during sewage treatment and degrade bottom sludge in ponds, lakes and reservoirs, and further has extensive social effects and economic benefits.

The invention relates to the technical field of sewage treatment, in particular to a sewage treatment device and a sewage treatment method thereof. The sewage treatment device comprises an anoxic tank, an aerobic tank, two facultative tanks and an MBR film tank which are sequentially arranged, the two facultative tanks are alternately communicated with the aerobic tank, an air diffuser is arrangedin each facultative tank and connected with an air blower through an air pipe, and an air pipe control valve is arranged on each air pipe. And the two facultative tanks are respectively communicatedwith the anoxic tank through a sludge reflux pump. According to the sewage treatment device disclosed by the invention, the facultative tanks for enhanced denitrification by utilizing endogenous respiration are additionally arranged, so that efficient removal of nitrogen pollutants in sewage is realized; sludge subjected to static settlement in the facultative tanks flows back to the anoxic tank,so that deep utilization of a carbon source of the sewage is realized, the denitrification effect is enhanced, the amount of the sludge entering the MBR film tank is reduced, film pollution is alleviated, and relatively high film flux is adopted when an MBR film component is selected to reduce engineering investment.

The invention discloses a sewage treatment process for effectively denitrifying by endogenous respiration, which comprises the following steps: treating sewage by an anaerobic tank, an anoxic tank, amicro-aerobic zone tank, an aerobic tank and a secondary sedimentation tank in sequence, feeding the sewage from the upper end of the anaerobic tank, making the sewage with the anoxic tank by the anaerobic tank and then feeding into the micro-aerobic tank from the middle part of the anoxic tank, wherein the micro-aerobic tank is communicated with the bottom of the aerobic tank, sewage in the micro-aerobic tank enters the aerobic tank from the bottom after reaction, the sewage in the aerobic tank overflows into the secondary sedimentation tank after short retention, and the sewage is dischargedfor advanced treatment after sedimentation. The addition of salt is reduced, the secondary pollution is reduced, the DO control is relatively low, the electric charge is saved, the process control isrelatively easy, and large-scale replication can be realized.

The invention discloses a method for determining an OUR early warning value of a comprehensive connecting pipe sewage plant, and belongs to the technical field of sewage and wastewater treatment. Thepurpose of determining the OUR early warning value is achieved by continuously monitoring the relationship between the endogenous respiration rate of an aerobic pool of the sewage plant comprehensively taken over in a certain park and the change of environmental factors. The method comprises the following specific steps: (1) monitoring an activated sludge OUR[endogenous source] of an aerobic tankof a comprehensively taken-over sewage plant once a day; (2) monitoring the water temperature T, inlet water COD, ammonia nitrogen and MLSS of the aerobic tank of the comprehensively taken-over sewageplant once a day; and (3) establishing a linear relationship between the OUR[endogenous source] and the environmental factor change, and determining an OUR early warning value according to the changerule of the OUR[endogenous source] in response to the environmental factor. When the OUR of a certain stream of incoming water of the sewage plant is greater than the OUR early warning value, the wastewater can be biochemically treated; and when the OUR of a certain stream of incoming water is less than or equal to the OUR early warning value, the stream of incoming water is toxic or difficult todegrade, and the stream of incoming water enters an emergency treatment pool and takes corresponding measures. The method is suitable for comprehensive sewage plants of sewage and wastewater mixed connection pipes, and is especially suitable for comprehensive connection pipe sewage plants in chemical industrial parks.