57results about How to "Strong impact load resistance" patented technology

The invention belongs to the technical field of sewage treatment, and relates to a rural domestic sewage biological treatment system, particularly a rural domestic sewage biological treatment system which has the advantages of low capital construction and operating cost, small occupied room, convenient operation and management, high sewage treatment efficiency and discharge after reaching the standard. The rural domestic sewage biological treatment system provided by the invention is connected with a rural domestic sewage discharge pipeline. The rural domestic sewage biological treatment system is characterized by comprising an ecological open septic tank, a microaeration oxidation pond, a suspended substance biological filter, an artificial wetland and a scenic pond, wherein the ecological open septic tank, microaeration oxidation pond, suspended substance biological filter, artificial wetland and scenic pond are arranged from high to low and communicated through a pipeline or ditch; the sewage flows under the gravity; and the water inlet of the ecological open septic tank is connected with the rural domestic sewage discharge pipeline. The rural domestic sewage biological treatment system provided by the invention solves the problem of large occupied area, high investment and maintenance cost and the like in other rural sewage treatment methods.

The invention relates to a real-time automatically back-flushing control system of a denitrification filter pool and a running method. The system comprises an online water turbidity sensor, a nitrate sensor, a turbidity tester and a nitrate tester, and further comprises a process controller and an industrial personal computer. The online water turbidity sensor, the nitrate sensor, the turbidity tester and the nitrate tester are arranged in the denitrification filter pool. The process controller is provided with a plurality of relays of a water feeding pump relay, an intake valve relay and the like, and the relays are sequentially and respectively connected with corresponding pumps and valves in a control manner. A clean water tank is further provided with a water discharging pipe and a mud storage tank, the water discharging pipe is communicated with the upper part of a filter material layer of the denitrification filter pool, and the mud storage tank is communicated with the upper part of the denitrification filter pool. The running method of the back-flushing control system comprises the following steps of: 1, control system starting; 2, parameter treatment judgment; 3, drainage process; 4, single gas back-flushing; 5, gas-water combined back-flushing; and 6, single water back-flushing. The invention is suitable for the urban sewage advanced treatment and the nitrogenous industrial wastewater treatment, and has the advantages of perfected structure, convenience of operation, high efficiency and good effect.

The invention discloses a real-time control method for denitrification by an enhanced circulating activated sludge method, which belongs to the field of biological denitrification of sewage and is suitable for advanced treatment of urban sewage. The effect of circulating activated sludge method on nitrogen and phosphorus removal is not ideal. The steps of the present invention: open the agitator in the main reaction zone at the same time as entering the water, and carry out the denitrification process under the anoxic condition, and stop stirring when a maximum value appears on the pH value curve and an inflection point appears on the ORP curve; Oxygen is supplied to the mixed solution to degrade organic matter and nitrify nitrogenous compounds, and stop aeration when a minimum value appears on the pH curve; repeat the above steps until the end of the water inflow stage, and react with the aerobic aeration stage end of period. The following process is similar to the traditional CAST method. It enters the sedimentation, drainage, and idle stages in turn, repeating all steps in turn and discharging sludge regularly. The whole process is completed by a real-time control system, which is easy to operate, low in cost, strong in impact load resistance, and not prone to sludge bulking.

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

The invention relates to a method for realizing nitrogenous wastewater biological treatment process, particularly to a method for realizing short distance deep denitrogenation. The inventive method includes a short distance deep denitrogenation starting-up stage, a stabilizing stage and a cooling stage; and comprises the steps of feeding water, aerating, denitrifying, settling, draining, sludge discharging, and idle running. In the short distance deep denitrogenation starting-up stage, the system temperature is 25 DEG C, the mean sludge retention time is 15 days, and the number of operating periods is 90-95; in the stabilizing stage, the system temperature is 25 DEG C, the sludge retention time is 15 days, and the number of operating periods is 60-65; and in the cooling stage, the system temperature is adjusted to 18 DEG C, the sludge retention time is 15 days, and after 30-35 operating periods, the temperature is adjusted to 11 DEG C, and the sludge retention time is 20 days. The inventive method has the advantages of good denitrogenation effect, high degree of automation, low energy consumption, and capability of stable operation under low temperature conditions.

The invention discloses a combined electrolysis reactor and a waste water treatment method thereof, belonging to the technical field of waste water treatment. The combined electrolysis reactor comprises a reactor and a reactor base, wherein a power supply chamber, a multidimensional electrode chamber, an iron-carbon micro-electrolysis chamber, a water distribution aeration chamber and an equipment chamber are sequentially inside the reactor from top to bottom; the power supply chamber is arranged in the top cover of the reactor and is provided with two power supply controllers; the multidimensional electrode chamber is arranged below the top cover of the reactor and consists of four electrode plates which are sequentially electrode plates a, b, d and c from left to right, wherein the electrode plates a and d are main anodes, the electrode plates b and c are main cathodes, and carbon packing fills in the gaps among the electrode plates; the iron-carbon micro-electrolysis chamber is positioned at the lower part of the multidimensional electrode chamber and is internally filled with iron-carbon packing; the water distribution aeration chamber is positioned at the lower part of the iron-carbon micro-electrolysis chamber and respectively carries out water distribution and aeration through a water distribution pump and an aeration pump in the equipment chamber. According to the combined electrolysis reactor, the treatment efficiency can be effectively improved, and the occurrence of passivation and hardening can be reduced.

The invention relates to a landfill leachate high-performance denitrification system and denitrification process thereof. A movable bed membrane bio-reactor is combined with a denitrification pool ofthe active sludge membrane bio-reactor. For the landfill leachate with sufficient carbon source on the front end, the landfill leachate high-performance denitrification system comprises a core structure of the denitrification pool combined with the movable bed membrane bio-reactor, the denitrification pool and a hyperfiltration membrane; for the landfill leachate with insufficient carbon source onthe front end, the landfill leachate high-performance denitrification system comprises a primary denitrification pool, the denitrification pool combined with the movable bed membrane bio-reactor, a secondary dentrification pool and a hyperfiltration membrane; and for the landfill leachate with high denitrification requirement, the landfill leachate high-performance denitrification system comprises a core structure of a front-mounted denitrification pool, a primary denitrification pool, a rear-mounted denitrification pool combined with the movable bed membrane bio-reactor, a secondary denitrification pool and a hyperfiltration membrane. By sufficiently utilizing the existing carbon source, the ammonium nitrogen and total nitrogen can be significantly removed, the operation expense can be reduced, an effect of continuity, stability, high performance and low operation cost can be achieved, and the landfill leachate high-performance denitrification system and denitrification process thereof are suitable for treating high-ammonium-nitrogen waste water of the landfill leachate.

The invention relates to a method and a device for joint denitrifying by denitrification and anaerobic ammonia oxidation embedding particles, and belongs to the field of sewage. The method comprises the following steps of respectively embedding a WPU (water-borne polyurethane) material by separated denitrification bacteria and anaerobic ammonia oxidation bacteria, putting the denitrification embedding particles into a flow-separated ball, putting anaerobic ammonia oxidation embedding particles into a Pall ring or into water in a floating state, and setting the denitrification embedding particles and the anaerobic ammonia oxidation embedding particles into an incomplete mixing state. The device comprises a water bath constant-temperature system, a sealing device, the flow-separated ball, the Pall ring and the like. The method and the device have the advantages that after embedding of the denitrification bacteria and anaerobic ammonia oxidation bacteria, the influence to the activity is avoided, the amounts of the denitrification bacteria and the anaerobic ammonia oxidation bacteria in the system are increased, the loss of bacteria amounts is reduced, the problems of slow growth of the anaerobic ammonia oxidation bacteria and stricter growth environment requirement in an anaerobic ammonia oxidation technology are solved, and the denitrifying efficiency of the system is improved by combining a nitrifying mode; the two types of embedding are set into the incomplete mixing state in the device, and respective feeding ratios can be flexibly adjusted according to the water quality.

The invention discloses a step-feed CAST nitrite denitrifying phosphorus removal method and a process control device thereof and belongs to the technical field of SBR and modified process sewage biologic denitrification thereof. The device comprises a selector, a main reaction area, a water inlet pump, a stirrer, a submersible mixer, a return sludge pump, an aerator, an air compressor, a water decanter, a drain valve, a mud valve and a real-time control system. By adopting integration of a multiple-water inlet running mode and a real-time control system, an organic carbon source in the original sewage is furthest utilized and furthermore, the ammoxidation, denitrifying dephosphatation and phosphorus release time in each stage is scientifically and reasonably distributed. The anaerobic stirring time is increased and operation based on a variable-duration anoxic / aerobic mode is adopted, the anoxic phosphorus uptake effect of the selector in the aerobiotic time and the anoxic phosphorus uptake effect of the main reaction area in the anoxic time are reinforced, and the anaerobic stirring time and the aerobic aerating time are controlled by a real-time process control strategy.

The invention provides a comprehensive deep treatment method for wastewater. The method comprises steps of: (1) feeding mixed wastewater into a regulating tank and performing aeration and stirring to make the water quality and the water mount of the mixed waste water uniform; (2) piping the wastewater in the step (1) into a hydrolytic acidification-anaerobic-aerobic biological treatment system and performing biochemical treatment; and (3) subjecting discharged water of an oxidation ditch to a biochar reaction to perform deep treatment, and discharging after filtration by a biochar filtering tank. Organic matters, ammonia nitrogen, and the like which are difficult to biodegrade are absorbed by the biochar filtering tank and degraded slowly. According to the method, a sulfate reducing bacteria and a hydrolytic acidification bacteria are successfully cultured in a primary anaerobic reactor under a condition that COD / SO<4><2-> is smaller than 0.5, thus achieving partial removal of the SO<4><2-> and degradation of the macro-molecule organic matters and reducing the COD.

The invention discloses a pesticide wastewater treatment process and a treatment device thereof. A process system comprises a Fenton oxidation tank, a regulating tank, a hydrolysis acidification tank,a pre-anoxic tank, a CASS tank, an efficient sedimentation tank, an ozone catalytic oxidation treatment unit, a biological aerated filter and a disinfection tank. The invention aims at the characteristics of high organic matter concentration, complex components, high chromaticity, strong toxicity, extremely poor biodegradability and the like of pesticide wastewater. A combined process combining anovel advanced oxidation technology, a traditional physical and chemical process and a biological technology is adopted, the removal effect on refractory organics is good, the deodorization and decoloration capacity is high, and effluent can meet the first-grade A emission standard of Discharge Standard of Pollutants for Municipal Wastewater Treatment Plant GB18918-2002 and is discharged into a receiving water body.

The invention relates to a control device and a method of a CAST segmental inflow and synchronous denitrification and dephosphorization reinforcement process, which belongs to the technical field of SBR and variant process spent water biological denitrification. The denitrification and dephosphorization effect of the currently used CAST technique is not desirable. The device comprises a selector, a main reaction zone, an inlet pump, a stirrer, a diving stirrer, a return sludge pump, an aerator, an air compressor, a decant machine, a drain valve, a mud valve, a real-time controlling system and a sensor. The real-time controlling system is used for controlling a time-delay device which is connected with the inlet pump, the stirrer, the diving stirrer, the return sludge pump, the air compressor, the decant machine, the drain valve and the mud valve, a computer, and a data collecting card connected on the computer. By the processes of inflow anoxia stirring, inflow anaerobism stirring, aeration, sedimentation, drainage and leaving unused, the synchronous denitrification and dephosphorization is realized. The device and the method have the advantages of good denitrification and dephosphorization effect, low operation cost, and being capable of realizing intelligent control, and the like.

The invention discloses a refuse leachate treatment method. The refuse leachate is pretreated preliminarily by using an adsorption column filled with fillers of natural zeolite and boron mud so that the concentration of ammonia nitrogen in the refuse leachate is reduced, then the treated refuse leachate is subjected to two-stage aerobic aeration and anoxia stirring by using a water injecting delaying sequencing batch reactor, and finally the treated refuse leachate is treated deeply by using constructed wetland to reach the standard before being discharged. The refuse leachate treatment method disclosed by the invention has the advantages of high removal efficiency of ammonia nitrogen and organic matters, low treatment cost, stable quality of treated refuse leachate and strong impact load resisting capacity. In addition, the generated surplus sludge can be recovered and used as a feed or compost, the harm of the refuse leachate to the human health can be prevented effectively, the problems that the existing refuse leachate treatment process is low in nitrogen removal efficiency, high in treatment cost and poor in stability and can not adapt to the quality change of the refuse leachate flexibly can be solved. The refuse leachate treatment method disclosed by the invention can be widely popularized and applied to the treatment of refuse leachate in the refuse landfill.

The invention discloses an oily sewage treatment method which is characterized by comprising the following steps: treating oily sewage by using activated sludge; treating the treated oily sewage by using a biological membrane. The invention also discloses an oily sewage treatment system which is characterized by comprising a biochemical pool which is filled with activated sludge and is used for carrying out activated sludge treatment on oily sewage; a biological filter tank which contains a biological membrane and is used for carrying out biological membrane treatment on the oily sewage; a biochemical tank which is communicated with the biological filter tank. The invention also discloses a construction method of the oily sewage treatment system, which is characterized by comprising the following steps: domesticating activated sludge; preparation of biofilms. According to the treatment method, the yield of the sludge is greatly reduced while efficient and advanced treatment of the oily sewage is guaranteed, the water quality is stable, and the method belongs to a green and environment-friendly treatment method.

The invention provides an internal-mixing anaerobic reaction tank. A tank body is of a column shape, and a cone-shaped sludge bulking region, a reaction region, a gas-solid-liquid separation region and a precipitation separation effluent region are sequentially arranged in the tank body from bottom to top; and the cone-shaped sludge bulking region is a cone-shaped cover, an effluent weir is arranged above the precipitation separation effluent region, an automatic return-flow system is arranged at the top of the tank body and comprises an air lifting pipe, an air-water separation tank and a return pipe, the air lifting pipe is connected with the cone-shaped sludge bulking region and the air-water separation tank, the return pipe stretches into the lower part of the reaction region, a sewage gas pipe is connected between the air-water separation tank and the gas-solid-liquid separation region, and a sewage gas circulating pipe is connected between the air-water separation tank and a water distribution pipe. The internal-mixing anaerobic reaction tank has the advantages that the tank body is low in height, the tank can be started quickly by flocculent sludge with high shock load resistance, the requirement on a Ph value of inflow water is low, granule sludge increases quickly, the processing energy consumption is low, the processing efficiency is high, the effluent quality is stable, and the tank is suitable for processing of organic pollutants in various concentrations, simple to operate and convenience to run.

The invention relates to a printing and dyeing wastewater treatment technique. The printing and dyeing wastewater treatment technique includes: feeding desizing wastewater into an adjusting pool prior to lifting to an anaerobic reactor through a pump, and allowing supernatant to flow into a settling pool after the desizing wastewater is treated in the anaerobic reactor; allowing comprehensive wastewater to enter the adjusting pool for settling via a pipeline, lifting the supernatant to the anaerobic reactor via the pump, and allowing the wastewater subjected to treatment of the anaerobic reactor to flow into an A / O pool via a primary settling pool; allowing the wastewater to flow into a secondary settling pool via the A / O pool, arranging a micro-electrolytic reactor in a water outlet of the secondary settling pool, allowing the treated wastewater to flow into a dosing pool and then into a tertiary pool via the dosing pool, sending sludge in the tertiary pool into the adjusting settling pool, and allowing the supernatant to enter an integrated XHOC pool, then a wastewater end settling pool prior to a sand filter tank via an oxidation pond, wherein treated water flowing from the sand filter tank is standard discharge water. The printing and dyeing wastewater treatment technique has the advantages of low energy consumption, high efficiency and stable effluent quality, and the technique is suitable for treatment of organic pollutants with various concentrations, simple in operation and convenient in running.

The invention relates to a culture method and a culture device for aerobic granular sludge. The culture method for the aerobic granular sludge particularly comprises the following steps of inoculatingactive sludge in a reactor, adding PAC (Polyaluminum Chloride) and sepiolite, and mixing the active sludge; pumping artificial synthetic wastewater into the reactor by utilizing a water intake device, and culturing the aerobic granular sludge through an SBR (Sequencing Batch Reactor) treatment process. The culture device is used for solving problems that the start time is long, the running is unstable, the impact load resisting ability is weak and sludge is easily disintegrated, and the like, in a culture procedure of the aerobic granular sludge, can be used for enhancing biological phosphorus removal, and has advantages of synchronous denitrogenation and phosphorus removal function, stable running, wide raw material source, simple operation and the like.

The invention discloses a small modular integrated device for rural sewage treatment. The device comprises a water inlet pipe, a biochemical reaction pool, a sedimentation pool, a rotating bracket, a water outlet pipe, aeration elements, packing elements, a sludge discharging channel and drive equipment, wherein the biochemical reaction pool and the sedimentation pool are arranged adjacent to each other and share the same pool wall, and a return sewage port and a water outlet are formed in the bottom of the same pool wall from bottom to top respectively; the driving equipment is in driving connection with a central rotating shaft of the rotating bracket, and the rotating bracket is erected on the biochemical reaction pool through the rotating shaft, the packing elements and the aeration elements parallel to the horizontal plane respectively are arranged uniformly on the rotating bracket from the inner ring to the outer ring sequentially; the water inlet pipe and the sludge discharging channel respectively communicate with the biochemical reaction pool, and the water outlet pipe communicates with the sedimentation pool. The device adopts advantages of a biofilm process, couples technologies of a biological rotating disc, activated sludge and mechanical aeration, occupies small area, operates efficiently and stably and is high in economic efficiency, simple in structure and convenient to operate and maintain.

The invention discloses a power supply circuit based on multiple parallel input power supplies and a power supply control method. The power supply circuit comprises multiple parallel input power supplies and a control circuit, wherein each input power supply is connected to a low-voltage power supply capacitor decoupling circuit through a one-to-one corresponding BOOST circuit, the low-voltage power supply capacitor decoupling circuit is connected to a push-pull boost circuit, the push-pull boost circuit is connected to an output support circuit, and the output support circuit is used for supplying power to a load; and the control circuit is respectively connected with each BOOST circuit and the push-pull boost circuit. According to the invention, multiple different types of input power supplies are allowed to work simultaneously and support dynamic adjustment, that is, different input power supplies adopt corresponding closed-loop control modes, and bus voltage parameters are automatically adjusted. The power supply circuit has the advantages of being capable of adapting to input power supplies with different voltage parameters, optimizing the energy conversion efficiency, and being compatible with common household power storage and generation devices.

The invention discloses an acid pickling and phosphating production wastewater treatment device which comprises a grid, an adjusting tank, a Fenton oxidation integrated treatment device, a neutralization and coagulation integrated treatment device, a hydrolysis and denitrification integrated treatment device and an A / O biochemical integrated treatment device, wherein the grid, the adjusting tank,the Fenton oxidation integrated treatment device, the neutralization and coagulation integrated treatment device, the hydrolysis and denitrification integrated treatment device and the A / O biochemicalintegrated treatment device are connected in sequence. The acid pickling and phosphating production wastewater treatment device has the advantages of strong impact load resistance, high treatment efficiency, low investment cost and low operating cost.

The invention discloses an integral efficient sewage treatment system. The integral efficient sewage treatment system comprises a residual separation lifting tank, an efficient denitrification reactor, a high-load bioreactor, a dephosphorization tank and a filtering and disinfection tank. The integral efficient sewage treatment system is low in construction cost, low in operating cost, high in domestic sewage treatment efficiency and small in floor space, effluent quality stably reaches the first level A standard or above, and problems of high investment cost, high operating cost, large floorspace, low domestic sewage treatment efficiency and quality instability of treated wastewater in the prior art are solved.

The invention discloses a high-efficiency combined anaerobic biological treatment system for treating high-concentration organic waste water, comprising a plurality of combined anaerobic biological treatment reactors. Each reactor comprises a fluidization area and a biological film treatment area; the fluidization area which is cylindrical is arranged in the center of a biological treatment tank; the bottom of the biological treatment tank is provided with a flow-reflecting hopper; stuffing is arranged in the biological treatment tank, and the top of the stuffing is provided with an inclined plate separation area; the biological treatment tank is encircled around a fluidization bed and comprises an inner ring and an outer ring on the plane; and separation walls are circularly and vertically arranged along the tank body in either circular treatment area and divide the tank body into a plurality of grids which are filled with combined stuffing. The invention has the advantages of strong shockproof loading capacity, high treatment efficiency, strong stability, flexible operation (by connection in series or parallel), strong suitability for the variation of water quality, water quantity and temperature, small floor area, little investment, convenient management, and the like.

The invention discloses a stripping tower, which comprises a reaction column, wherein a filler is filled in the middle of the reaction column; a sprayer is arranged at the top of the reaction column and is connected with a submersible pump inside a water tank; a gas inlet is additionally arranged in the middle of the reaction column and is connected with a gas pump through a gas flowmeter; and a water outlet is arranged at the bottom of the reaction column. According to the invention, the stripping tower is small in occupied area, simple in structure, strong in resistance to compact load and convenient in assembly; and high-concentration ammonia nitrogen in toxic wastewater of garbage leachate can be effectively removed in a short time, so as to provide a reliable technology for a standard treatment for the ammonia nitrogen of the wastewater.

The invention discloses a waste transfer station leachate treatment integral facility which comprises a treatment zone and an equipment room, wherein the treatment zone comprises a multi-stage anaerobic pool, an anoxic pond, an aerobiotic pond, a membrane biological reaction tank and a settling pond which are sequentially arranged in a communicated manner according to treatment procedures; a membrane biological reactor is arranged in the membrane biological reaction tank; a lifting pump, a backflow pump, a water generation tank, a water generation pump, an electric control cabinet, a cleaningfilter, a chemical tank, a dosing pump, a backwash pump, a fan for aerating the aerobiotic pond and the membrane biological reaction tank, and a temperature adjusting device for controlling temperatures in the treatment zone are arranged in the equipment room. By adopting the facility, the problems of insufficient floor spaces in a residual community and unstable water amounts can be avoided; dueto adoption an integral treatment process, leachate can be deeply treated, requirements of up-to-standard emission of effluents can be met, and the facility has the advantages of being low in operation energy consumption and high in treatment efficiency.

The invention discloses an industrial wastewater treatment system for a thermal power plant. The industrial wastewater treatment system is characterized by comprising a wastewater storage basin, a wastewater delivery pump, a PH regulating tank, a reaction trough, a solid contact clarifying basin, an efficient quick sand filter, a neutralization basin and a drain basin which are sequentially communicated with one another, wherein the bottom of the solid contact clarifying basin is communicated with a sludge treatment system. The advanced solid contact clarifying basin and the efficient quick sand filter are adopted to perform dual removal on suspended substances, so that suspended substances in the treated wastewater are not greater than 10ppm, so that the treated wastewater is recyclable. The efficient quick sand filter adopted in the system is of high-tech environment-friendly product with a unique design; the up-flow fluid bed filtration theory and a single homogeneous filtering material are adopted, filtration and elutriation are performed at the same time, flushing or back flushing can be realized without halt; a traditional high-power back flushing system is replaced by smart sand extraction and elutriation structure, so that not only can the energy consumption be greatly reduced, but also auxiliary valves and pipeline systems of the system are greatly reduced, so that the running and operating maintenance is relatively simple.

The invention relates to urea-containing printing and dyeing wastewater processing equipment and its processing method. The equipment comprises a regulating tank, an oxidation reaction tank, a primary sedimentation tank, a hydrolysis acidification tank, an oxidation ditch and a secondary sedimentation tank. The regulating tank, the oxidation reaction tank, the primary sedimentation tank, the hydrolysis acidification tank, the oxidation ditch and the secondary sedimentation tank are successively connected to form integrated processing equipment. The urea-containing printing and dyeing wastewater processing equipment and its processing method combine advantages of coagulation, decoloration and nitrogen removal processing. After printing and dyeing mother liquor wastewater is treated by the processing method, ammonia nitrogen, chroma and COD can be effectively degraded. Processing can meet the requirement of discharging into a pipe network. The equipment and the method have low processing cost and are simple to operate and easy to control.

In the invention, dissolved oxygen DO, redox potential ORP and pH value is used as fuzzy parameters to keep realized short range nitrofy denitrify processing, not only the phenomenon that short range nitrofy transfers to total range nitrofy produced by long time aeration is avoided, but also has advantages of complete nitrofy and denitrofy. The other characteristic is to combine short range nitrofy denitrofy processing and SBR together.

The invention discloses a high-ammonia-nitrogen waste liquid purification process. A purification system for the process mainly comprises a grating, a sedimentation tank, a heat exchanger, a stripping tower and an absorption tower. The purification method comprises the following steps of: (1) pretreating the high-ammonia-nitrogen waste liquid through the grating and the sedimentation tank to separate impurities in the waste liquid, and then adding alkali to adjust the pH value; (2) heating the waste liquid in the step (1) in the heat exchanger; (3) enabling the waste liquid heated in the step (2) to enter the stripping tower to be in contact with circulating gas for mass transfer, efficiently stripping NH3 under a high-temperature condition, enabling the stripped waste liquid to enter the bottom of the tower to be discharged, or recycling the waste liquid after deep treatment; (4) enabling the circulating gas rich in ammonia nitrogen in the step (3) to enter the lower part of an absorption tower, transferring NH3 in the gas from a gas phase into sprayed absorption liquid under a gas-liquid phase balance condition, and reacting with acid in the absorption liquid to generate ammonium salt; and meanwhile, enabling the circulating gas becoming clean again to enter the stripping tower to be recycled; and (5) discharging the absorption liquid from the bottom of the tower, crystallizing, dehydrating and drying to obtain a solid product, thereby completing the recovery of ammonia nitrogen resources.

The invention discloses a small and medium-sized continuously-enhanced short-process low-energy-consumption decontamination system comprising processes of first-stage A / O, second-stage A / O, disinfection and sludge drying. Compared with an existing decontamination system, the decontamination system disclosed by the invention has relative large changes in structures, processes, application and utility range. The decontamination system comprises the following processes: performing pre-treatment (grille tank-adjustment grit chamber) on sewage to remove scums, performing dephosphorization, nitrification and bio-film reaction on a first-stage A / O part (anaerobic tank-first-stage biological contact oxidation tank), performing denitrification and bio-film reaction on a second-stage A / O part (anoxic tank-second-stage biological contact oxidation tank), and finally precipitating, disinfecting and discharging on standards, wherein sludge is discharged by virtue of unpowered hydrostatic pressure. The system disclosed by the invention is small in floor area, low in investment, less in running management cost, simple in maintenance and strong in impact load bearing capacity, can adopt modular construction, is short in construction period, and reliable in engineering quality; and the effluent is stable, and can exceed the first-grade standard B of Discharge Standard of Pollutants for Municipal Wastewater Treatment Plant (GB18918-2002).

The invention discloses a culture method of denitrification granular sludge for wastewater treatment. The method comprises the following steps: inoculating denitrificationflocculent sludge domesticated by a sewage treatment plant into a denitrification granular sludge reactor, controlling the ratio of COD concentration to NO3-N concentration by taking simulated wastewater as inlet water, culturingunder anaerobic conditions, meanwhile, monitoring the effluent condition of NO3-N, on the premise that the removal rate of NO3-N is kept at 80% or above, continuously increasing the concentration ofCOD and NO3-N in inflow water till the concentration of COD and NO3-N reaches a certain value, and when the removal rate of NO3-N reaches 90% or above, adjusting the retention time of the reactor until the removal rate of NO3-N in effluent reaches 95% or above so as to obtain the denitrification granular sludge for wastewater treatment. The denitrification granular sludge cultured by the method has the advantages of good settling performance, high biological concentration, low operation cost and energy consumption, high impact load resistance, strong anti-toxicity effect and the like, the operation cost and energy consumption of a reactor are reduced, and the cultured granular sludge can be used for treating high-COD and high-NO3-N wastewater.