52results about How to "Effluent water quality is stable and up to standard" patented technology

A process for treating the sewage generated by preparing fruit juice includes such steps as regulating pH value and flow, air floating for degumming, anaerobic fermenting decomposing, aerobic treating, mud-water separation, biologic treating, physical filtering and disinfecting. Its advantages are high-effect to remove organic substances (pectin) and low cost.

The invention relates to a resourceful treatment and recycling method of circuit board wastewater. The resourceful treatment and recycling method comprises the following steps of 1, precipitation breaking and copper removal, wherein pH of the circuit board wastewater is adjusted to 2-4, the circuit board wastewater is put into a precipitation breaking and copper removal reactor filled with ferric carbon filler, an aeration reaction is performed, the pH of outlet water of the reactor is adjusted, a flocculating agent is added, a stirring coagulating reaction is performed, and solid-liquid separation is performed; 2, cyanide breaking and nickel removal, wherein the pH of a supernate obtained in the step 1 is adjusted to 2-4, the supernate is put into a cyanide breaking and nickel removal reactor, and an aeration reaction is performed, the pH of outlet water of the reactor is adjusted to 8-9, a stirring coagulating reaction is performed, and solid liquid separation is performed; 3, filter material biological filter pond treatment, wherein the supernate obtained in the step 2 is added into a filter material biochemical treatment system with a cyanide breaking and nickel removal filter material, cyanide breaking and nickel removal are performed, and the final outlet water is obtained. Compared with the prior art, the method is simple in flow, compact, stable, efficient, low in operation cost, applicable to wastewater with the high heavy metal concentration and particularly suitable for circuit board wastewater treatment, and has the high popularization and application value.

The invention discloses a treatment method for high-concentration suspended matter waste water. The treatment method comprises the following steps that 1, a multi-stage hydrocyclone is utilized for separating the waste water containing high-concentration suspended matter to obtain deposition and overflow liquid, and the deposition is recovered; 2, deposited slurry is concentrated, wherein the overflow liquid obtained in the step 1 is guided into a radial-flow sedimentation tank, a flocculating agent is introduced into an accessory adding pipe of the overflow liquid and the radial-flow sedimentation tank in a multi-point adding mode to obtain the deposited slurry and supernatant water, and the supernatant water is recovered; 3, the deposited slurry is dehydrated, wherein the deposited slurry obtained in the step 2 is subjected to filter pressing and drum film secondary extruding dehydrating, meanwhile, air entering and flow penetrating are carried out, and filter residues in a whole filter chamber are purged in a full-flow and high-pressure mode. The invention further discloses a device for using the treatment method for the high-concentration suspended matter waste water. Solid and liquid can be separated fast, the deposited slurry is dehydrated fast, the high-concentration suspended matter waste water can meet the standard or can be recovered for production, the water content of mud cakes is low, and the requirement for clean transportation is met.

The invention discloses an integrated coagulation-synergism inclined plate oil-removing device. The integrated coagulation-synergism inclined plate oil-removing device is mainly composed of a coagulation part and a turbidity-removing oil-removing part, wherein the coagulation part is used for realizing treatment of colloidal oil and emulsified oil by virtue of a mixing device and grid flocculation; the coagulated sewage enters the turbidity-removing oil-removing part through a water distributing pore plate; the turbidity-removing oil-removing part is provided with inclined plates of two different forms for achieving a precipitation turbidity-removing effect and a coalescence oil-removing effect. By changing the installation angles of the inclined plates, the inclined plates are mainly used for realizing the purposes of particle precipitation and coalescence oil-removing, respectively; a V-shaped partition plate is arranged in a water outlet region and used for preventing upper floating oil from entering a water outlet tube; the oil is gathered by the V-shaped slot at the upper end of the turbidity-removing oil-removing area, and exhausted by an oil outlet tube; and precipitates are gathered in a mud hopper and exhausted by a mud outlet tube. Compared with the prior art, the integrated coagulation-synergism inclined plate oil-removing device has the characteristics of high treatment efficiency, good effluent quality, investment-saving, low treatment cost and the like, so that the potential of the existing oil-removing facility can be furthest excavated, and therefore, the maximal benefits are obtained by utilizing the minimal investment.

The invention relates to a hexogen production wastewater treatment system and a hexogen production wastewater treatment method, and belongs to the field of wastewater treatment. The hexogen production wastewater treatment system comprises a pH regulating pool, an anaerobic pond, an anaerobic reactor, a contact oxidation pond, a settling pond, a biological activated carbon pond and a sand filter pond. The system and the method have the advantages that organic matters and nitrate nitrogen in waste water can be fully utilized for increasing the wastewater pH, and the addition quantity of alkali during the neutralization is greatly reduced. Most organic pollutants can be removed through the anaerobic reactor, and in addition, partial pollutants difficult to biochemically degrade are converted into matters capable of being easily utilized by microorganisms. The wastewater is subjected to two-stage aerobic treatment, a biological activated carbon process is utilized for carrying out deep treatment on outlet water of the contact oxidation pond, and the stable standard reaching of the outlet water quality is ensured.

The invention relates to a comprehensive treatment method for high-salt high-COD wastewater. The method comprises the following steps that (1) wastewater enters an adjustment tank through a grid, thepH is adjusted, effluent of the adjustment tank enters a coagulating sedimentation tank, and a flocculant is added for coagulating sedimentation; (2) effluent of the coagulating sedimentation tank enters an ultrasonic electrocatalysis oxidation device for treatment; (3) effluent of the ultrasonic electrocatalysis oxidation device enters an electrodialysis device for treatment; (4) through electrodialysis desalination, fresh water enters an ABR anaerobic baffle plate reactor for treatment; (5) effluent of the ABR anaerobic baffle plate reactor enters a BSBR reactor, and a salt-tolerance microorganism reinforcement salt-containing wastewater is added to the BSBR reactor for biochemical treatment; (6) effluent of the BSBR reactor enters an ozone reaction device for treatment; (7) ozone effluent passes through an adsorption filtering device and is reused or discharged at last. The method has the advantages that the technology is reliable and high in stability, the rate of removing pollutants is high, and the water quality of the effluent stably reaches the standard, and the method is suitable for comprehensive treatment of the high-salt high-COD wastewater.

The invention discloses a wastewater treatment method and a wastewater treatment system utilizing a combination of an anaerobic membrane bioreaction and shortcut nitrification and denitrification. Thewastewater treatment method comprises the following steps: carrying out an anaerobic reaction on to-be-treated wastewater to obtain first wastewater; and filtering the first wastewater, and carryingout a biological denitrification reaction to allow the first wastewater to reach the standard, thereby completing wastewater treatment. After the wastewater is subjected to anaerobic-shortcut denitrification treatment, effluent quality is stable and reaches the standard; wastewater treatment equipment is centralized, so an occupied area is reduced, and operation and management are convenient; a shortcut nitrification and denitrification reactor control system detects and controls the changes of water quality parameters in the shortcut nitrification-denitrification nitrogen removal process in real time, so automatic control over shortcut nitrification-denitrification nitrogen removal is easy to achieve.

The invention discloses a method for treating high-concentration chemical wastewater. The method comprises a pre-treatment step, an up-flow type anaerobic sludge bed treatment step and a contact oxidation treatment step in sequence. The method has the innovation point that the pre-treatment step comprises an iron-carbon micro-electrolysis step and a coal / natural indirect liquidation oxidization step; the contact oxidation treatment step comprises an anaerobic treatment step and a two-stage aerobic treatment step; the first-stage aerobic treatment step in the two-stage aerobic treatment step comprises an anoxic and biochar-process activated sludge combined treatment step. According to the method for treating high-concentration chemical wastewater, the operation feasibility is improved, the labor intensity is reduced, the filler is enabled to be in a suspension state without being blocked and plugged by controlling the grain size of the filler and operation parameters of an aeration system and an inner circulating system, the iron powder and the carbon powder are released to the sewage in a facilitated mode, the gas phase, the liquid phase and the solid phase are completely contacted, and the treatment efficiency is improved.

The invention provides a rural domestic sewage self-driven landscape ecological treatment method and system. The system comprises an automatic control system, a sewage detection device, and a dosing device; the automatic control system is electrically connected with a solar power supply device; the sewage detection device is electrically connected with the automatic control system; the sewage treatment device comprises a water collecting tank, a Biochemical adjusting tank, an A / O biochemical tank, a same-position nitrification denitrification filter bed, a discharge tank and a variable-frequency controller; the automatic control system is electrically connected with the automatic control system; the frequency conversion controller is electrically connected with the automatic control system; and the dosing device is electrically connected with the automatic control system. According to the method and the system, the residence time of rural domestic sewage in the biochemical treatment process is greatly shortened, the problem that rural domestic sewage is difficult to treat is solved, the effluent quality is stable and up to the standard, the later maintenance application cost is low, the occupied area is small, the operation efficiency is improved, and the cost is reduced; meanwhile, landscape plants are loaded on the filter bed, nutrient substances in the sewage can be absorbed, the landscape plants are capable of being matched with a rural environment landscape, and the landscape plants are free of foul smell and can meet the construction requirements of the rural environment.

The invention provides a big data intelligent analysis digital management and control platform based on a sewage treatment plant, which can solve the problems of simulation and production operation optimization of a mechanical equipment system and a microbial system. Virtual simulation is carried out on the production process of the sewage treatment plant, a dynamic mathematical model is established to simulate microbial growth, reproduction, attenuation and death processes and mechanical equipment operation and faults in various technological processes of the sewage treatment plant, the flow and the effluent quality of each technological unit reactor are solved and simulated, and in a certain time range, the production process of the sewage treatment plant is simulated. Time derivation is conducted on the concentration equations and the flow equations of all the components through the boundary conditions, and the effluent concentration and the effluent flow of each component in the corresponding time are obtained. The method solves the problems that an existing sewage treatment plant is tedious in process adjustment process, the optimal result is not easy to achieve, and the capability of optimizing the operation process according to the change of incoming water pollutants in real time does not exist.

The invention discloses a treatment method for wastewater containing high-concentration suspended solids. The treatment method comprises the following steps of 1, multi-stage hydraulic cyclone pretreatment of the wastewater, wherein the wastewater containing the high-concentration suspended solids is separated by using multi-stage hydraulic cyclone centrifugal force, the solid particles of different sizes are pretreated, overflowing liquid enters the next link, and sediment is recycled; 2, multi-point flocculating settling concentration of the overflowing liquid, wherein the overflowing liquidobtained in the step 1 is introduced into a radical sedimentation basin, a flocculating agent is added into an additive adding pipe of the overflowing liquid at multiple points, by using the naturalvertical turbulent mixing effect of water flow, sufficient and quick mixing of the flocculating agent is achieved, concentrated slurry and supernatant water are obtained, and the supernatant water isrecycled; 3, multiple dehydration of the concentrated slurry, wherein the concentrated slurry obtained in the step 2 is subjected to multiple dehydration, such as direct filter pressing, tympanic secondary squeezing and full-flow high-pressure blowing of filter residues. Efficient solid-liquid separation and quick dehydration of the slurry are achieved, the outlet water quality meets the dischargestandards of the Integrated Wastewater Discharge Standards (GB8978) or the requirements of production recycling, the water content of a slurry cake is low, and the requirements for clean transportation are met.

The invention relates to the technical field of MBBR (Moving Bed Biofilm Reactor) sewage treatment, and discloses a high-standard effluent process with low operation cost. The process comprises an anaerobic phosphorus release area, a static settling area, a phosphorus removal flocculation reaction area, a phosphorus removal settling area, a denitrification phosphorus removal anoxic area, a denitrification nitrogen removal anoxic area, a phosphorus uptake nitrification aerobic area, a primary settling area, a nitrification aerobic (carrier) area, a denitrification oxygen elimination (carrier) area, a secondary settling area, a quartz sand filtering area, a water outlet area and a disinfection area which are sequentially connected from front to back, the problems that a traditional sewage plant wastes a carbon source and the treatment cost is increased due to manual addition of the carbon source in the later stage are solved; the total phosphorus in the supernatant with higher phosphorus concentration generated by phosphorus release of phosphorus release bacteria in an anaerobic zone is removed through side-flow dosing precipitation, so that the probability that the total phosphorus in the effluent is not up to the standard due to entering a subsequent treatment structure is avoided; and the influence of excessive medicament and nitrate nitrogen on the phosphorus release and phosphorus absorption capacity of the phosphorus release bacteria is avoided.

The invention relates to an imidazole-containing chemical silver plating wastewater treatment system, which comprises an imidazole-containing chemical silver plating wastewater collection tank, a Fenton catalytic oxidation device, a physicochemical reaction precipitation device, a temporary storage tank and a resin adsorption device which are sequentially arranged along the flow direction of wastewater, the Fenton catalytic oxidation device comprises an oxidation pond; the physicochemical reaction precipitation device comprises a reaction tank, a coagulation tank and a precipitation tank whichare sequentially arranged in the flow direction of the wastewater, an inlet of the reaction tank is communicated with an outlet of the oxidation tank, and an outlet of the precipitation tank is communicated with an inlet of the temporary storage tank to collect precipitated a supernatant; the resin adsorption device comprises a sand filter tower, an activated carbon tower, a precision filter, ananion exchange resin tower and a chelating ion exchange resin tower which are sequentially arranged along the flow direction of the wastewater; and an inlet of the sand filter tower is communicated with an outlet of the temporary storage tank. The concentration of mercury ions passing through the treatment system can be stably lower than 0.1 mg / l. The invention also provides a method for treatingwastewater by adopting the imidazole-containing chemical silver plating wastewater treatment system.

The invention discloses a liquid level adjustable type biological rotating disc system, and belongs to the field of sewage treatment equipment. The system comprises a liquid level adjusting water storage tank, a hydraulic level control valve and a biological rotating disc device, wherein a water outlet of the liquid level adjusting water storage tank is communicated with a water inlet of a reaction tank of the biological rotating disc device through a pipeline and the hydraulic level control valve arranged on the pipeline; the hydraulic level control valve is arranged in the reaction tank of the biological rotating disc device; the position of the liquid level adjusting water storage tank is higher than that of the reaction tank of the biological rotating disc device; and the volume of the liquid level adjusting water storage tank is larger than or equal to that of the reaction tank of the biological rotating disc device. According to the system, the liquid level adjusting water storage tank and the hydraulic control valve are matched to adjust the liquid level of the reaction tank of the biological rotating disc so as to control a submergence ratio of the biological rotating disc, then, the biological rotating disc is adjusted from half submergence to full submergence, and the problem that the biological rotating disc is difficult to start again after shut down is solved.

The invention provides a nitrogen removal and phosphorus recovery sewage treatment system which comprises a pretreatment system, a biological treatment system, an advanced treatment system, a sludge treatment system and a phosphorus recovery system which are connected in sequence, and the pretreatment system comprises a coarse screen, a fine screen, an aerated grit chamber and a fine screen tank which are connected in sequence; the biological treatment system comprises an AO treatment unit and a secondary sedimentation tank unit which are connected in sequence; the deep treatment system comprises a denitrification filter tank, an air floatation tank and a contact disinfection tank which are connected in sequence; the sludge treatment system comprises a sludge thickening tank unit, a sludge conditioning tank and a sludge dewatering machine room which are connected in sequence; the phosphorus recovery system comprises a phosphorus slag stirring tank, a phosphorus slag concentration tank and a phosphorus slag dehydration workshop which are connected in sequence. According to the sewage treatment system, the technological process is simple, all functional sections are reasonably arranged, the pretreatment system removes large suspended solids and inorganic sand grains, the biological treatment system strengthens removal of total nitrogen and organic matter, and the deep treatment system further removes TN and TP.

The invention relates to denitrification biofilter reactor and a method for treating sewage utilizing the same, and particularly discloses a denitrification biofilter reactor utilizing corncob as a bio-carrier and a method for treating sewage by the denitrification biofilter reactor, aiming to solve the problem that the effluent TN is lower than the national primary A standard, expensive carbon sources in a great quantity are needed additionally and treatment cost is high in conventional sewage treatment process. The denitrification biofilter reactor utilizing corncob as a bio-carrier comprises a reactor body, a water feeding tank, a water feeding pipe, a plurality of water discharging pipes and a backwashing inlet pipe. The method for treating sewage is that sewage is fed into the reactorbody, remains in the reactor body for 60-70 minutes, and is discharged from the water discharging pipes, thus, sewage treatment is completed. The denitrification biofilter reactor and the method areapplicable to treatment of sewage.

The invention relates to a hospital wastewater treatment method and system. Wastewater is firstly treated by a grating and then sequentially passes through an adjusting tank, a coagulative precipitation tank, an electrocatalytic oxidation device, an MBBR biochemical tank, a precipitation tank, a biochar tower, a precision filter and a disinfection tank to reach the reuse standard and the discharge standard; and sludge generated by the coagulative precipitation tank, the MBBR biochemical tank and the biological activated carbon tower is discharged into a sludge concentration tank, the sludge treated by the sludge concentration tank is dewatered, the dewatered sludge is transported out for final treatment, and sewage flows back to the regulating tank. According to the invention, through mutual cooperation of all the steps and synergistic effect of all the treatment devices, the effluent quality of the treated hospital wastewater can easily reach the discharge standard, and the treatment method has the advantages of reliable process, strong stability, high pollutant removal rate, stable and standard effluent quality, low operation cost and the like, and is suitable for treatment of the hospital wastewater.

The invention discloses an intelligent control method for a sewage plant based on a mutation inversion effluent prediction model. Intelligent sensing module preprocesses data acquired by equipment, inputs the data into a mutation inversion model to predict an effluent quality parameter; the predicted effluent quality parameter is input into an intelligent control module to obtain a corresponding equipment control instruction transmitted to corresponding equipment, so as to realize automatic operation; meanwhile, a database records effluent quality data, predicted effluent quality data and thecorresponding control instruction, automatically corrects model parameters and realizes an intelligent closed loop. The intelligent control method can predict the quality of the current effluent in real time, and solve the problem of time lag of an effluent quality detection sensor. Compared with a traditional model, the intelligent control method simplifies a solving process, improves the model precision and effectively ensures that the quality of the effluent meets the standard stably.

The invention discloses a filter backwashing control method, and belongs to the field of filter backwashing. The method comprises the following steps: S1, collecting a first state parameter of a filter tank, and optimizing the first state parameter to obtain an optimized filter period; S2, acquiring a second state parameter of the filter tank and a corresponding backwashing parameter group, and optimizing the second state parameter and the backwashing parameter group to obtain an optimized backwashing parameter group; and S3, carrying out backwashing control on the filter tank according to the optimized filter period and backwashing parameter group. The method has the beneficial effects that: the filtering period and backwashing parameters of the filter tank are optimized, so that the backwashing process of the filter tank is optimized and controlled, the water yield is further improved, the energy consumption and the production cost are reduced, and the refined control of the filtering link is realized.

The invention relates to the technical field of wastewater treatment, in particular to a water curtain spraying room circulating wastewater treatment and recycling system and method in the automobile paint spraying treatment process. The optimized advanced treatment recycling system and recycling method are provided for water curtain spraying room circulating discharge waste water in the automobile paint spraying treatment process of an automobile manufacturing plant, toxic and harmful substances and organic pollutants in the waste water are greatly reduced through coagulating sedimentation treatment, and the waste water is recycled. In the subsequent treatment process, evaporation concentration treatment and three-stage advanced oxidation device treatment are adopted, refractory organics in the water body can be removed to a great extent, and the water body is recycled after passing through an ultrafiltration device, a reverse osmosis device, a sterilization device and a constant-pressure water supply device. The treated reuse water can be used for recycling of a water curtain spraying room paint mist capturing system, the water consumption is greatly reduced, and the discharge amount of industrial wastewater is reduced to the maximum extent.

The invention relates to the field of sewage treatment, in particular to a combined filter material biological aerated filter system, which comprises a filter body, an aeration system and a carbon source storage tank, and is characterized in that the filter body internally comprises a non-aeration area and an aeration area, and a retaining wall is arranged between the aeration area and the non-aeration area; a plurality of layers of filter material frames are fixed in the aeration area and the non-aeration area, and filter materials are filled in the filter material frames to form a filler layer; one side, close to the non-aeration area, of the filter tank body is communicated with a water inlet pipe, and one side, close to the aeration area, of the filter tank body is communicated with awater outlet pipe; the aeration system comprises air supply equipment and an aeration pipe arranged in the aeration area, and the air supply equipment is communicated with the aeration pipe through anair guide pipe; and a carbon source storage tank is communicated with the water inlet pipe through a carbon source feeding pipe. The system can improve the water quality treatment efficiency and effect, reduce the operation management difficulty, reduce the operation cost, simplify the structure in the pool and improve the maintenance efficiency, and has lower requirements on water inlet SS.

The invention discloses an automatic control system and an automatic control method for treating heavy metal wastewater based on an ion-exchange resin method, wherein the system comprises an image collector, a color difference identifier, a first transmitter, a controller, a second transmitter, a relay and an upper computer; the image collector is used for collecting color images of the ion-exchange resin and transfers the color images to the color difference identifier, the color difference identifier extracts characteristics from the transferred color images and transmits the extracted characteristic values to the controller, the controller is used for carrying out comparative analysis on the received characteristic values and given reference contrast color characteristics, the analysis result is concluded and output through the transmitter, and finally, whether the resin needs to be regenerated is displayed on the upper computer and a regeneration program is executed through a valve which is controlled by the relay. The automatic control system and the automatic control method are capable of overcoming the problem that effluent exceeds standard due to lag of monitoring on the ion-exchange resin effluent, caused by an artificial reason; the computer is used for identifying the color change of the ion-exchange resin to determine an automatic saturation point, and therefore, stable and up-to-standard effluent quality is guaranteed.

The invention discloses a landfill leachate treatment system and process. The landfill leachate treatment system comprises a plurality of treatment units which are sequentially arranged, wherein the treatment units comprise an adjusting tank, a denitrification system, a nitrification system, an ultrafiltration system, a first iron-carbon oxidation catalysis system, a first coagulative precipitation tank, a second iron-carbon oxidation catalysis system, a second coagulative precipitation tank and a filter tank, a leachate inlet is formed in the adjusting tank, and the water inlet of any treatment unit excluding the adjusting tank is communicated with the water outlet of the previous treatment unit. The landfill leachate treatment process is realized through the system. The landfill leachatetreatment system disclosed by the invention has the advantages of high treatment efficiency, stable and up-to-standard effluent quality, relatively low energy consumption and low investment and operation cost. The landfill leachate treatment process disclosed by the invention has the advantages of simple flow, low final effluent quality parameter content, no generation of a concentrated solutionand good leachate treatment effect.

The invention discloses a denitrification and energy self-integration system for high-carbon-nitrogen-ratio wastewater. The system comprises a water inflow pump, a synchronous denitrification methanation device, an integrated anaerobic ammonia oxidation device and a composite ozone catalytic device which are sequentially connected through a pipeline; the synchronous denitrification methanation device is an upflow anaerobic sludge bed; the integrated anaerobic ammonia oxidation device comprises a homogenizing compartment, a plurality of reaction compartments and a precipitation compartment which are sequentially arranged and communicated with one another from one end to the other end; the synchronous denitrification methanation device is communicated with the homogenizing compartment through a first water outflow pipe; the composite ozone catalytic device comprises a plurality of electrocatalytic tubes which are connected in parallel; each electrocatalytic tube is communicated with an outlet in the top end of the precipitation compartment; an annular carbon cathode plate and an anode aerator arranged in the annular carbon cathode plate in a penetrating manner are arranged in each electrocatalytic tube; each anode aerator is connected with a second air compressor through an air inflow pipe; and the second air compressor is communicated with an air source. According to the systemof the invention, the treatment efficiency of the high-carbon-nitrogen-ratio wastewater is improved.

The invention relates to a secondary trickling filter system for treating domestic sewage of villages and small towns and a trickling filter process thereof, aiming to provide a secondary trickling filter system for treating domestic sewage of villages and small towns and a trickling filter process thereof, with low investment, low operating expense and energy consumption and stable and standard outlet water quality. The secondary trickling filter system for treating domestic sewage of villages and small towns is characterized by comprising an anaerobic pond treatment subsystem, a trickling filter treatment subsystem and a land percolation subsystem which are sequentially connected through a pipeline, wherein an outlet water lifting well is arranged between the trickling filter treatment subsystem and the land percolation subsystem, and the trickling filter treatment subsystem is formed by connecting two stages of trickling filter treatment units in series. The treatment process comprises the following steps of: (1) carrying anaerobic treatment; (2) carrying trickling filter treatment; and (3) refluxing a part of sewage, ensuring that a part of sewage enters the land percolation subsystem for deep treatment and then draining. The invention is mainly used for treating the domestic sewage of villages and small towns.

The invention provides a fluorine-containing industrial wastewater treatment system and a treatment method thereof. The method comprises the steps of pH adjustment, primary fluorine removal, secondary fluorine removal, precipitation clarification, resin fluorine removal and sludge treatment. According to the defluorination treatment method, the treated high-concentration fluorine-containing wastewater is stable in effluent and can reach the discharge standard of less than 10mg / L, and the treated wastewater can be recycled and also can be directly discharged.

The invention discloses a method for deeply removing organic phosphorus in waste water. The method comprises: under the condition that the pH value is 7.0-9.0 and a catalyst exists, adding ozone into the waste water, optionally adding a pro-oxidant to carry out an oxidation reaction; then adding a phosphorus removal agent to carry out coagulation and precipitation. According to the method of the present invention, the reaction is carried out in the range of pH 7.0-9.0, the reaction conditions are mild, and the operating cost is low; the organic phosphorus-containing wastewater is oxidized by using a strong oxidant to effectively remove the organic phosphorus in the wastewater, and then combined with With the addition of phosphorus removal agents, the removal rate of organic phosphorus is greater than 99%, which can reduce the total phosphorus in wastewater to below 0.3mg / L; it solves the problem that it is difficult to completely remove organic phosphorus and the total phosphorus cannot meet the standard, and can be widely used in various In the standard treatment of organic phosphorus-containing wastewater.

The invention discloses an enhanced nitrification process based on coupled demolding, and belongs to the technical field of sewage treatment. In the sewage nitrification process, under a condition ofkeeping a certain content of dissolved oxygen in a system, extrusion treatments are carried out on an elastic filler so as to generate different deformation degrees, in each extrusion treatment, deepextrusion and shallow extrusion are coupled; deep extrusion is carried out when the system load decreases, the effluent quality is close to an index value, or the system resistance exceeds a designedinflow water distribution pressure; and shallow extrusion is carried out when the system load is stable. Through the combination of deep extrusion and shallow extrusion, on one hand, demolding and redistribution of a bio-membrane filler can be realized, the mass transfer efficiency is improved, on the other hand, dissolved oxygen inside and outside the bio-membrane filler can be distributed more uniformly, through the synergistic effect of deep extrusion and shallow extrusion, the nitrification reaction is enhanced, the sewage treatment efficiency is improved, and the effluent quality is recovered.

The invention discloses a method for reducing and recycling sludge, which is characterized by comprising the following steps: 1. periodically discharging surplus sludge in a precipitation tank to a sludge concentration tank, and carrying out sludge concentration; 2. periodically extracting the sludge in the sludge concentration tank to an anaerobic digestion tank, and carrying out anaerobic mesophilic digestion; and 3. periodically sucking the anaerobic sludge acclimatized by the anaerobic digestion tank into a UASB (upflow anaerobic sludge blanket) tank as a supplemented sludge source, and dehydrating and discharging the rest digested sludge. The invention also discloses a sludge treatment system with sludge reduction and recycling functions. The method can reduce the sludge by 30-50%, reduces the discharge amount of the surplus sludge, lowers the sludge treatment cost, protects the surrounding environment, is beneficial to enhancing the treatment rate of the UASB tank, lowers the energy consumption of the aerobic unit, is especially suitable for low-nitrogen / phosphorus-content sewage which can not satisfy the biochemical requirements and needs to add additional nitrogen and phosphorus, can reduce the nitrogen / phosphorus consumption of the sewage plant, and can discharge stable water after reaching the standard.

The invention relates to a treatment system and method for hexogen production wastewater, belonging to the field of wastewater treatment. The treatment system for hexogen production wastewater comprises a pH regulating tank, an anoxic tank, an anaerobic reactor, a contact oxidation tank, a sedimentation tank, a biological activated carbon tank and a sand filter. In the invention, the wastewater pH is increased by use of the organic matters and nitrate nitrogen in the wastewater, and the addition of alkali for neutralizing is greatly reduced. Most organic pollutants can be removed by the anaerobic reactor, and some biorefractory pollutants are transformed into substances easily utilized by microorganism. The wastewater is subjected to two-level aerobic treatment, advanced treatment is performed on the effluent of the contact oxidation tank by a biological activated carbon technology, and stable and up-to-standard effluent quality is guaranteed.