33results about How to "SS low" patented technology

The invention discloses a garbage leachate advanced treatment method and a Fenton reaction tower. The advanced treatment method comprises the following steps: (1) treating garbage leachate in a membrane bioreactor; (2) sending effluent water treated by the step (1) into a Fenton reaction tower, and carrying out advanced oxidation treatment; (3) sending the effluent water treated by the step (2) into a precipitation tank; (4) sending the effluent water treated by the step (3) into an anaerobic aeration biofilter; and (5) sending the effluent water treated by the step (4) into an aerobic aeration biofilter, and discharging the effluent water after reaching the standard. The method is simple to operate and low in operating cost, does not generate any concentrated solution, can implement energy saving and emission reduction in deed.

The invention relates to an integrated biological reactor for treatment of industrial wastewater and domestic sewage. The integrated biological reactor comprises an anaerobic tank, an anoxic tank, an aerobic tank and a sedimentation tank, wherein the integrated biological reactor is shaped like a barrel as a whole, the cross section of the integrated biological reactor comprises three concentric circles, the interior of an outmost circular ring which is surrounded by the outmost two circles is divided into the anoxic tank and the aerobic tank through a partition plate, and the height of the partition plate is lower than that of a barrel body of the reactor; a middle circular ring surrounded by the innermost two circles is the sedimentation tank, and the anaerobic tank is arranged in the innermost circle; and the anaerobic tank is connected with the anoxic tank through a pipeline, and the aerobic tank is connected with the sedimentation tank through the pipeline. An aeration device is mounted at the bottom of the aerobic tank, and aeration is generally performed through a Roots blower. A sludge discharge pipe is arranged at the bottom of the sedimentation tank. The anaerobic-anoxic-aerobic-sedimentation tanks are integrally arranged and built, thus the problem of large occupied area in a traditional mode can be solved.

The invention relates to a treatment device and method for simultaneously removing high-concentration SS, fluoride, sulfate, arsenate and COD in desulfurization waste water. The treatment device is characterized in that an overflowing port of a settling pond is connected with a first delivery pump through a pipeline, a first-level defecator stirring device is installed on a first-level defecator, and a second delivery pump is connected with a third reaction tank through a pipeline. The treatment method includes the steps that the desulfurization waste water enters the settling pond for primary settling, and then outlet water sequentially enters a first reaction tank and a second reaction tank to be subjected to a chemical-coagulating sedimentation reaction and then enters the first-level defecator for solid-liquid separation; supernate is introduced into the third reaction tank, mixed liquid after the reaction sequentially enters a flocculation tank to be subjected to a flocculation reaction and a second-level defecator to be defecated and concentrated; the supernate is introduced into a filtering device to be filtered, and the pH value of output water is adjusted to be 6-9. The high-concentration SS, fluoride, sulfate, arsenate and COD in the desulfurization waste water are effectively and simultaneously removed.

The invention discloses a low-energy self-circulation treatment method for rural sewage, which is characterized in that the treatment method comprises the steps of adopting an aerobiotic adherent biological filter method, allowing microorganisms to be adhered onto the surface of a filtering material in an aerobiotic manner, forming a biological film, adsorbing and degrading organics, mixing inflow sewage and filter liquor for dilution, allowing the treated sewage to be continuously circulated and filtered in a device and contacted with the biological film continuously, and achieving a purification purpose. The treatment method has the prominent characteristics that the inflow sewage is filtered for many times through the circulation, and the shock load of a sewage amount is resisted effectively. According to the treatment method, no worker is required for watching; the technological process is simple; a system can completely automatically treat the sewage; and the only power source is an immersible pump located in a pond.

The invention discloses a coupling type biological denitrification method which comprises the following steps: enabling sewage to enter a front-end anoxic pool, mixing with returned sludge and mixed liquid and carrying out denitrification reaction; entering an aerobic pool, removing an organic matter through aeration, realizing the nitration reaction and synchronizing the nitration reaction and the denitrification reaction; entering a rear anoxic pool and carrying out denitrification reaction again; and alternately entering a first SBR (Sequencing Batch Reactor) pool and a second SBR pool, treating a surplus carbon source generated in the denitrification or deeply nitrating and simultaneously carrying out sludge return. The invention also provides a coupling type biological denitrification system. The coupling type biological denitrification method and the coupling type biological denitrification system have the beneficial effects that pre-denitrification plus aerobic denitrification and CODcr degrading plus post-denitrification plus sequencing batch aerobic reaction are adopted to overcome the influence of an excessive denitrification carbon source on outlet water, the nitrogen removal efficiency is greatly improved, the nitrogen removal effect is remarkable, and the coupling type biological denitrification system is suitable for degrading high ammonia nitrogen and high COD (Chemical Oxygen Demand) wastewater and particularly has an remarkable effect on coal chemical industry wastewater treatment.

The invention provides a method for comprehensively treating and utilizing cassava vinasse waste water and industrial sludge. The method includes: pumping original cassava vinasse waste water into an anaerobic fermentation tank to perform whole-tank high-temperature anaerobic treatment so as to produce biogas; concentrating sludge discharged by the anaerobic fermentation tank, then delivering into a plate-and-frame filter press, and filtering with the plate-and-frame filter press to obtain anaerobic sludge and filtered clear liquid; using a precision filter to perform multistage purification on the filtered clear liquid to obtain first-level plain water and concentrated discharge water, processing the first-level plain water with a membrane biological processing device to obtain second-level plain water which can reach the indexes of production water, and recycling the plain water; mixing the obtained concentrated discharge water and anaerobic sludge with other industrial sludge, dewatering with a dewatering machine, and then conveying to a pyrolyzing furnace for pyrolysis so as to produce combustible gas. The method has the advantages that after the cassava vinasse waste water is subjected to anaerobic fermentation to produce the biogas, self-balancing of energy production and power consumption can be achieved, the water produced after the treatment by the precision filter and a membrane biological reactor can be recycled, resource utilization is achieved, and production cost is lowered.

The invention relates to a coking wastewater optimizing treatment process and device. The process is as follows: light oil and heavy oil contained in the coking wastewater are firstly removed in an oil separator; then air flotation treatment is carried out to reduce ammonia nitrogen; water distribution is carried out in a regulating tank; after water distribution, 70% of the coking wastewater is introduced into an aerobic tank 1, and 30% of the coking wastewater is introduced into an anaerobic tank; after the coking wastewater is subjected to treatments in the aerobic tank 1, a sedimentation tank I, the anaerobic tank, an aerobic tank 2, a sedimentation tank II, a coagulative precipitation tank and a deep treatment tank in sequence, the quality of the final effluent is as follows: COD is lower than 80 mg / L, ammonia nitrogen is lower than 10 mg / L, volatile phenol is lower than 0.3 mg / L, cyanogen is lower than 0.2 mg / L, oil and suspended solids are basically removed, and water quality indicators meet the discharge standards. According to the invention, the process route is short, the equipment investment cost is low, the processing efficiency is high, the effect is stable, energy conservation and cost reduction are achieved, and economic and social benefits are remarkable.

The invention provides a separation type combined stereo constructed wetland system and a sewage processing method. The system comprises a wetland bed body with water separation function, and a stable surface flow pool and a subsurface flow pool which are constructed in the internal space of the wetland bed body; water-purification plants are grown on the surface flow pool, and also the stable surface flow pool is provided with a water inlet device; the stable surface flow pool and the subsurface flow pool are in connection via a reclaimed-water collection distribution device; and the subsurface flow pool is provided with a clean-water discharge device. A separation plate is horizontally arranged in the wetland body, and divides the space into an upper part and a lower part. The upper part is the stable surface flow pool, and the lower part is the subsurface flow pool. The stable surface flow pool and the subsurface flow pool are respectively filled with a stable surface flow pool matrix and a subsurface flow pool matrix, so that the stable surface flow pool and the subsurface flow pool are respectively formed. The provided sewage processing method employs the above wetland for purifying sewage. The advantages of small land occupation area, good discharged water quality and the like are provided.

The invention relates to a wastewater treatment method and discloses a process control method of a modified sequencing batch reactor (MSBR) system. The process control method includes that sequencing batch reactor (SBR) reaction tanks are operated alternately and intermittently and correspondingly regulate the process control method according to ambient temperatures or inflow water quality conditions. The process control method of the MSBR system has the advantages of being concise in operation modes, sufficient in aeration time and pre-setting time and capable of facilitating sediment and reducing suspended substance (SS) in discharged water, and the whole system performs continuous water inflow and continuous backflow to guarantee full mixing of backflow sludge and inflow water, so that automatic control and daily production management are facilitated; and the process control method is capable of achieving the best treatment effect under conditions of different temperatures and different inflow water qualities.

The invention provides an advanced sewage treatment device, which comprises a shell, a filtering material, a filtering material supporting plate, a water collection tank, a water distributor, a water distributor fixing frame, a water outlet pipe, a water inlet pipe, a chemical feed pipe and a dredge pipe, wherein the filtering material is arranged in the shell; the water distributor is connected with the water inlet pipe; the water outlet pipe is arranged on the shell; the water inlet pipe is arranged at an upper opening end of the shell; the dredge pipe is arranged at the bottom of the shell; the advanced sewage treatment device is characterized in that the filtering material is arranged on the upper part in the shell and is supported by the filtering material supporting plate; an oblique plate and an oblique plate supporting frame are arranged below the filtering material; the bottom of the oblique plate is positioned on the oblique plate supporting frame; a chlorine dioxide pipe vertically and downwardly leads into and penetrates through the filtering material from the upper part of the shell; the lower end of the chlorine dioxide pipe is connected with a perforated pipe; and the perforated pipe is positioned between the oblique plate and the filtering material. According to the advanced sewage treatment device, coagulation, oblique plate sedimentation, chlorine dioxide oxidation, filtration and adsorption effects are finished in a same tank; and the advanced sewage treatment device has the advantages of rational and compact structure, good effluent quality, high treatment efficiency, low operation cost, high adaptability and easiness in operation and management.

The invention discloses a biogas slurry solid-liquid separation treatment method. A conditioner is adopted to transfer part of polar insoluble substances in biogas slurry from a solid-liquid phase toan organic phase, so that the stability of an original colloid system of the biogas slurry is reduced, and the solid-liquid separation performance of sludge is improved. Furthermore, the conditioner is effectively recycled and cyclically utilized. The method comprises the following steps: mixing biogas slurry with a conditioner, and carrying out stirring extraction reaction; and carrying out solid-liquid separation on biogas slurry through mechanical centrifugation. Effective recovery of the conditioner in supernatant and biogas residues after centrifugation is achieved, and then cyclic utilization of the conditioner is completed while the solid content of the biogas residues is increased and the SS of effluent is reduced. Finally, the SS of the effluent is lower than 600mg / L, the solventrecovery rate is higher than 90%, and the moisture content of the mud cake is lower than 60%. According to the method, the consumption of a coagulation / flocculation conditioning agent in a traditionalbiogas slurry solid-liquid separation process is reduced, the energy consumption in the biogas residue incineration treatment process is also reduced, and the method has important social and environmental benefits and wide market application prospects.

The invention relates to an efficient contact type anaerobic reactor and a method for treating wastewater, the reactor comprises an anaerobic reactor body, the anaerobic reactor body comprises a reaction zone located at the front end and a separation zone located at the rear end, the reaction zone and the separation zone are connected through a water passing zone, and the reaction zone is formed by connecting more than one reaction chamber in series; the separation zone is provided with a built-in secondary mud-water separation zone through a support, the lower part of the separation zone is provided with a primary mud collection zone, the lower part of the built-in secondary mud-water separation zone is provided with a secondary mud collection zone, and the side wall of the lower part of the built-in secondary mud-water separation zone is provided with a water distribution port; two support frames, a water outlet tank, a water outlet and a drainage tank are sequentially arranged at the upper part of the built-in secondary mud-water separation zone along the water outlet direction, a three-phase separator and a filler are arranged on the support frames, and the primary mud collection zone and the secondary mud collection zone are connected with a sludge pump. Inlet water SS is allowed in a large range, operation is easy, the adaptive capacity is high, operation is stable, and suspended solids in outlet water of the system can be greatly reduced.

The invention provides a double-sludge biologically enhanced sewage treatment device, which is cylindrical and includes an anoxic zone formed by a central partition, an aerobic / sedimentation zone surrounding the anoxic zone, and the aerobic / sedimentation zone It includes an anoxic zone with a water inlet opening, a sedimentation zone on the upper part of the anoxic zone, the sedimentation zone is formed on the outside of the inner compartment with an annular guide plate, and the direction of the annular guide plate of the inner compartment and the annular mud guide cone The inclined parts inside the device are relatively spaced apart, and the mud passage formed connects the sedimentation zone and the aerobic zone. The device provided by the invention overcomes the traditional biochemical technology with low sludge concentration, poor biochemical effect and large floor area by adding powder carrier in the central aerobic zone and increasing the attachment area of ​​the activated sludge method in the aerobic zone , the disadvantage of many single structures. Each reaction unit is closely combined in space, the pool body is built together, the head loss is small, and it has the advantages of high sludge concentration, good treatment effect and small device volume.

The invention provides a method for comprehensively treating and utilizing cassava vinasse waste water and industrial sludge. The method includes: pumping original cassava vinasse waste water into an anaerobic fermentation tank to perform whole-tank high-temperature anaerobic treatment so as to produce biogas; concentrating sludge discharged by the anaerobic fermentation tank, then delivering into a plate-and-frame filter press, and filtering with the plate-and-frame filter press to obtain anaerobic sludge and filtered clear liquid; using a precision filter to perform multistage purification on the filtered clear liquid to obtain first-level plain water and concentrated discharge water, processing the first-level plain water with a membrane biological processing device to obtain second-level plain water which can reach the indexes of production water, and recycling the plain water; mixing the obtained concentrated discharge water and anaerobic sludge with other industrial sludge, dewatering with a dewatering machine, and then conveying to a pyrolyzing furnace for pyrolysis so as to produce combustible gas. The method has the advantages that after the cassava vinasse waste water is subjected to anaerobic fermentation to produce the biogas, self-balancing of energy production and power consumption can be achieved, the water produced after the treatment by the precision filter and a membrane biological reactor can be recycled, resource utilization is achieved, and production cost is lowered.

The invention provides a separation type combined stereo constructed wetland system and a sewage processing method. The system comprises a wetland bed body with water separation function, and a stable surface flow pool and a subsurface flow pool which are constructed in the internal space of the wetland bed body; water-purification plants are grown on the surface flow pool, and also the stable surface flow pool is provided with a water inlet device; the stable surface flow pool and the subsurface flow pool are in connection via a reclaimed-water collection distribution device; and the subsurface flow pool is provided with a clean-water discharge device. A separation plate is horizontally arranged in the wetland body, and divides the space into an upper part and a lower part. The upper part is the stable surface flow pool, and the lower part is the subsurface flow pool. The stable surface flow pool and the subsurface flow pool are respectively filled with a stable surface flow pool matrix and a subsurface flow pool matrix, so that the stable surface flow pool and the subsurface flow pool are respectively formed. The provided sewage processing method employs the above wetland for purifying sewage. The advantages of small land occupation area, good discharged water quality and the like are provided.

The invention relates to a coking wastewater optimizing treatment process and device. The process is as follows: light oil and heavy oil contained in the coking wastewater are firstly removed in an oil separator; then air flotation treatment is carried out to reduce ammonia nitrogen; water distribution is carried out in a regulating tank; after water distribution, 70% of the coking wastewater is introduced into an aerobic tank 1, and 30% of the coking wastewater is introduced into an anaerobic tank; after the coking wastewater is subjected to treatments in the aerobic tank 1, a sedimentation tank I, the anaerobic tank, an aerobic tank 2, a sedimentation tank II, a coagulative precipitation tank and a deep treatment tank in sequence, the quality of the final effluent is as follows: COD is lower than 80 mg / L, ammonia nitrogen is lower than 10 mg / L, volatile phenol is lower than 0.3 mg / L, cyanogen is lower than 0.2 mg / L, oil and suspended solids are basically removed, and water quality indicators meet the discharge standards. According to the invention, the process route is short, the equipment investment cost is low, the processing efficiency is high, the effect is stable, energy conservation and cost reduction are achieved, and economic and social benefits are remarkable.

The invention relates to a device for treating sewage by an aeration tank. The device comprises a grille, a grit chamber and a primary settling tank, and is characterized by also comprising a first aeration tank, a second aeration tank and a third aeration tank, wherein the first aeration tank, the second aeration tank and the third aeration tank are sequentially connected; the bottoms of the three aeration tanks are connected; a reverse flushing water outlet buffer tank is arranged; sludge in the buffer tank flows back to the primary settling tank; sewage in the third aeration tank flows back to the first aeration tank to perform denitrification; final sewage treated by the third aeration tank is discharged out through a reverse flushing storage tank. The device provided by the invention has the advantages that in the device, through the self interception effect of the filling material per se and the bioflocculation effects of surface biomembranes, the outlet water SS is very low and does not exceeds 10mg / L generally; due to the periodical reverse flushing, the biomembranes can be effectively updated; for specific performance, the biomembranes are thinner; the activity is higher.

A sedimentation tank for sewage treatment comprises an aerobic tank and a sedimentation tank body, the sedimentation tank body is arranged in the aerobic tank and is divided into a water inlet flow guide area and a sedimentation separation area, the sedimentation separation area is divided into a concentration area, a buffer area and a clear water area from bottom to top, and a water collecting tank is arranged in the clear water area, discharges water through a water outlet pipe and is controlled by a water outlet control valve to be opened and closed. A filler filtering layer is arranged atthe upper part of the buffer area, a sludge outlet is formed in the bottom of the concentration area, the bottom of the sedimentation tank is communicated with the bottom of the secondary aerobic tank, and a reflux treatment device for refluxing to other tanks in the sewage treatment device is arranged at the bottom of the secondary aerobic tank. The sedimentation tank has the advantages that 1) sludge backflow and mixed liquid backflow can be simplified into one path of mixed liquid backflow, biochemical reaction and mud-water separation are synchronously carried out, sludge backflow naturally flows back into a biochemical area only by virtue of gravity, an independent sludge backflow system is not needed, and relatively high activated sludge concentration of the aerobic tank can be maintained; and 2) the sedimentation tank disclosed by the invention has sludge sedimentation and effluent filtering functions at the same time.

The invention discloses a fortified straight-flow biological contact oxidation pond and an operation method thereof. The oxidation pond comprises a pond body, the cross section of the pond body is rectangular, the length-width ratio is (1:1)-(2:1), the pond body is internally sequentially provided with an aeration area, a packing layer and a water stabilization layer from bottom to top, and the height ratio of the aeration area, the packing layer and the water stabilization layer is 1:4:1.2; the outer side of the pond body is provided with a water inlet pipe at the aeration area and provided with a water outlet pipe at the water stabilization layer, and the bottom of the pond body is provided with a blowdown pipe; an aerator is arranged in the aeration area; a packing frame fixed on the inner wall of the pond body is arranged in the packing layer, and packing is hung on the packing frame; and a plant growth frame fixed on the inner wall of the pond body is arranged in the water stabilization layer. When the oxidation pond is operating, aquatic plants are planted on the plant growth frame in the water stabilization layer so as to form plant fortification, therefore, the sewage purification effect is enhanced, the SS of effluent water can be significantly reduced, a situation that the effluent water is turbid is avoided, the sewage retention time is reduced, and the purification efficiency is improved; and the oxidation pond is small in occupied space, convenient to operate and maintain, and low in investment and operation costs.

The invention relates to a method for improving the separation efficiency of a sludge gravity concentration tank. According to the method, spoilers are arranged through optimized coagulant adding positions and a pipeline mixer. According to the sludge gravity concentration tank, a sludge inlet pipe is connected with a coagulant dosing device; the coagulant dosing device comprises a coagulant dosing pump, a coagulant dosing pipe and the pipeline mixer; the pipeline mixer comprises a mixer barrel and the spoilers, the spoilers are evenly distributed on the inner wall of the cylindrical mixer barrel, the mixer barrel is fixedly connected with the sludge inlet pipe, an inlet of the mixer barrel is connected with the coagulant feeding pipe, and the coagulant feeding pipe is connected with the coagulant feeding pump. The beneficial effects are that the contact time of a coagulant and sludge is prolonged, the utilization rate of the coagulant is increased, and the coagulation reaction effectis enhanced through the optimized coagulant adding positions and the arranged spoilers.

The invention discloses an energy-saving low-consumption membrane-free aeration bioreactor, which comprises a box body, a porous filler, a feeding pump, an air compressor and a micro-nano aeration disc. The equipment is simple in structure, easy to assemble and manufacture and low in investment; compared with a traditional aeration tank, the energy consumption is low and the treatment efficiency is high; compared with MBR, the investment is low, and the energy consumption is low; the micro-nano bubbles can increase the content of dissolved organic matters in the sewage and improve the biodegradability of the sewage, so that the advantage of the sewage treatment agent in the aspect of degrading refractory organic matters is improved; a hydrophilic porous filler can quickly and uniformly diffuse micro-nano bubbles, so that the effective utilization rate of the micro-nano bubbles is improved; meanwhile, particulate matters can be filtered by the hydrophilic porous filler, and the SS content of an effluent is extremely low; the use effect of the bioreactor can be changed by adjusting the oxygen supply amount operation parameters, so that the bioreactor is suitable for different water treatment processes; the occupied area is greatly saved, the bioreactor can be conveniently added into an old water treatment process, and COD and ammonia nitrogen are effectively reduced.

The papermaking waste water treating process includes first grate filtering waste water to eliminate floated matter, treating in regulating pond, pumping into No. 1 and No. 2 transfer line reactor, depositing in the depositing pond, dewatering sludge in a belt pressure filter, coke filtering of the clear water from the upper layer of the depositing pond inside the filtering coke tower. The key points of the papermaking waste water treating process includes adding 2-10 wt% concentration sewage treating agent comprising aluminum sulfate, ferric sulfate, magnesium sulfate and lithopone into waste water in the No. 1 transfer line reactor, and adding 0.05-0.2 wt% concentration polyacrylamide solution into waste water in the No. 2 transfer line reactor, with the added amount of the sewage treating agent and the polyacrylamide solution each being 0.03 % waste water weight. The present invention may be used widely in various kinds of papermaking waste water.

The invention provides an integrated composite stereo constructed wetland system and a sewage processing method. The system comprises a wetland bed body possessing water-resisting function, and a surface flow pool and a subsurface flow pool which are constructed in the internal space of the wetland bed body; water-purification plants are grown on the surface flow pool, and also the surface flow pool is provided with a water inlet device; the surface flow pool and the subsurface flow pool are in connection via a reclaimed-water collection distribution device; and the subsurface flow pool is provided with a clean-water discharge device. The upper part of the internal space of the wetland bed body is the surface flow pool, and the lower part is the subsurface flow pool. The surface flow pool and the subsurface flow pool are respectively filled with a surface-flow pool matrix and a subsurface-flow pool matrix, the surface-flow pool matrix is used to fix the root of the water-purification plant and adsorb aerobic and facultative microbes, and the subsurface-flow pool matrix is used to adsorb hypoxic and anaerobic microbes and denitrifying bacteria. The provided sewage processing method employs the above wetland system for purifying sewage. The wetland system possesses the advantages of being small in land occupation area, good in discharged water quality and the like.

The invention provides a powder carrier-enhanced biochemical treatment integrated device, the device is separated by an inner compartment and an outer compartment to form the upper half of the aerobic zone, and the device is cylindrical, including a central cylindrical aerobic zone, surrounded by The anoxic / sedimentation zone of the above-mentioned aerobic zone, the anoxic / sedimentation zone includes an anoxic zone with a water inlet, a sedimentation zone located on the upper part of the anoxic zone, and a bottom pass connecting the anoxic zone and the aerobic zone. The sewage nitrification liquid in the orifice and the aerobic zone is returned to the submerged internal return pump in the anoxic zone. The device provided by the invention overcomes the traditional biochemical technology with low sludge concentration, poor biochemical effect and large floor area by adding powder carrier in the central aerobic zone and increasing the attachment area of ​​the activated sludge method in the aerobic zone , the disadvantage of many single structures. Each reaction unit is closely combined in space, the pool body is built together, the head loss is small, and it has the advantages of high sludge concentration, good treatment effect and small device volume.

The invention provides an advanced sewage treatment device, which comprises a shell, a filtering material, a filtering material supporting plate, a water collection tank, a water distributor, a water distributor fixing frame, a water outlet pipe, a water inlet pipe, a chemical feed pipe and a dredge pipe, wherein the filtering material is arranged in the shell; the water distributor is connected with the water inlet pipe; the water outlet pipe is arranged on the shell; the water inlet pipe is arranged at an upper opening end of the shell; the dredge pipe is arranged at the bottom of the shell; the advanced sewage treatment device is characterized in that the filtering material is arranged on the upper part in the shell and is supported by the filtering material supporting plate; an oblique plate and an oblique plate supporting frame are arranged below the filtering material; the bottom of the oblique plate is positioned on the oblique plate supporting frame; a chlorine dioxide pipe vertically and downwardly leads into and penetrates through the filtering material from the upper part of the shell; the lower end of the chlorine dioxide pipe is connected with a perforated pipe; and the perforated pipe is positioned between the oblique plate and the filtering material. According to the advanced sewage treatment device, coagulation, oblique plate sedimentation, chlorine dioxide oxidation, filtration and adsorption effects are finished in a same tank; and the advanced sewage treatment device has the advantages of rational and compact structure, good effluent quality, high treatment efficiency, low operation cost, high adaptability and easiness in operation and management.

The invention discloses a coupling type biological denitrification method which comprises the following steps: enabling sewage to enter a front-end anoxic pool, mixing with returned sludge and mixed liquid and carrying out denitrification reaction; entering an aerobic pool, removing an organic matter through aeration, realizing the nitration reaction and synchronizing the nitration reaction and the denitrification reaction; entering a rear anoxic pool and carrying out denitrification reaction again; and alternately entering a first SBR (Sequencing Batch Reactor) pool and a second SBR pool, treating a surplus carbon source generated in the denitrification or deeply nitrating and simultaneously carrying out sludge return. The invention also provides a coupling type biological denitrification system. The coupling type biological denitrification method and the coupling type biological denitrification system have the beneficial effects that pre-denitrification plus aerobic denitrification and CODcr degrading plus post-denitrification plus sequencing batch aerobic reaction are adopted to overcome the influence of an excessive denitrification carbon source on outlet water, the nitrogen removal efficiency is greatly improved, the nitrogen removal effect is remarkable, and the coupling type biological denitrification system is suitable for degrading high ammonia nitrogen and high COD (Chemical Oxygen Demand) wastewater and particularly has an remarkable effect on coal chemical industry wastewater treatment.

The invention relates to a treatment device and a treatment method for simultaneously removing high-concentration SS, fluoride, sulfate, arsenate and COD in desulfurization wastewater. The characteristics of the treatment device are: the overflow port of the sedimentation tank is connected to the No. 1 delivery pump through a pipeline, the stirring device of the primary clarifier is installed on the primary clarifier, and the No. 2 delivery pump is connected to the third reaction tank through a pipeline. The steps of the treatment method are as follows: after desulfurization wastewater enters the sedimentation tank for primary precipitation, the effluent enters the first reaction box and the second reaction box for chemical-coagulation sedimentation reaction in turn, and then enters the primary clarifier for solid-liquid separation; the supernatant liquid Introduced into the third reaction box, and the reacted mixed liquid then entered the flocculation box and the secondary clarifier in turn, respectively for flocculation reaction and clarification and concentration; the supernatant liquid was introduced into the filtration device for filtration, and the pH of the effluent was adjusted to 6-9. The present invention simultaneously removes high concentrations of SS, fluoride, sulfate, arsenate and COD in desulfurization wastewater economically and effectively.

The invention relates to a wastewater treatment method and discloses a process control method of a modified sequencing batch reactor (MSBR) system. The process control method includes that sequencing batch reactor (SBR) reaction tanks are operated alternately and intermittently and correspondingly regulate the process control method according to ambient temperatures or inflow water quality conditions. The process control method of the MSBR system has the advantages of being concise in operation modes, sufficient in aeration time and pre-setting time and capable of facilitating sediment and reducing suspended substance (SS) in discharged water, and the whole system performs continuous water inflow and continuous backflow to guarantee full mixing of backflow sludge and inflow water, so that automatic control and daily production management are facilitated; and the process control method is capable of achieving the best treatment effect under conditions of different temperatures and different inflow water qualities.