75results about How to "Reduce pool capacity" patented technology

The invention discloses a device which can realize the shortcut nitrification of sludge-digestion liquid through the combined control of FA and FNA. The device is provided with a raw water box, a shortcut nitrification reactor, a sedimentation tank and a water tank; the shortcut nitrification reactor is divided into a hypoxia stirring area and an aerobic zone, and a DO / pH online controller is arranged in the aerobic zone; an air-blast-head is arranged at the bottom of the reactor; a method utilizing the device to realize the shortcut nitrification comprises the following steps: firstly, a system is started; and secondly, the adjustment is carried out in running; the invention is applicable to the nitrification of the sludge-digestion liquid of a sewage treatment plant, the structure of the device is simple, the process of the method is simple, the operation is convenient, a plurality of carbon sources are saved, the nitrification speed is fast, and the effect is good.

The invention relates to a bioaugmentation treatment technology of the high ammonia nitrogen wastewater. The treatment technology is characterized in that under the condition that dissolved oxygen exists in the high ammonia nitrogen wastewater, an aerobic pool, an aerobic filter and a membrane pool are established, wherein by utilizing the metabolism of the aerobic microorganism, high concentration of organic substances are degraded, the organic substances with high molecular weight and energy are converted to substances with low molecular weight and energy; the aerobic pool adopts internal circulation and large-scale external circulation hydraulic agitation; and the aerobic filter is filled with novel fixed enzyme-floating filler and immobilized microorganism and microporous aeration and jet aeration are combined for aeration, thus the flow pattern of the nitrification filter is improved. Compared with the prior art, the system of the invention has high sludge concentration and the corresponding volume loading is also high, thus the floor space is small and the capital cost is low; the conversion rate and utilization rate of atmospheric oxygen is high, the effect of mass transfer is good, the anti-shock loading capability of the system is high, the effluent quality is stable; the operating cost is low; the density is increased relatively, the solid-liquid separating effect is good and the yield of excess sludge is low.

The invention discloses a sewage autotrophic nitrogen removal treatment method and device. The sewage is introduced into a pre-denitration reactor to remove dissolved oxygen; a part of the effluent is introduced into a shortcut nitrification reactor to convert NH4<+>-N into NO2<->-N; the other part of the effluent and the effluent from the shortcut nitrification reactor are simultaneously introduced into an anaerobic ammonia oxidation reactor to carry out anaerobic ammonia oxidation to remove nitrogen; a part of the effluent from the anaerobic ammonia oxidation reactor is discharged outside and the other part of the effluent from the anaerobic ammonia oxidation reactor flows back to the pre-denitration reactor to further remove nitrogen. According to the method and device disclosed by the invention, by combining the shortcut nitrification reactor and the anaerobic ammonia oxidation reactor, the urban sewage is treated, an efficient, low-consumption, low-cost and stable sewage treatment device for treating low-ammonia-nitrogen sewage is provided and the quality of the effluent is far superior to the requirements of national standard level A.

The invention discloses kitchen waste filtrate treatment equipment and method. The treatment method comprises the steps that the kitchen filtrate firstly enters an oil separation tank used for separating oil substances from water substances; the water after separation is converged into a regulating tank and the water quality and quantity are regulated; the effluent enters a reaction tank, PAC (polyaluminium chloride) and PAM (polyacrylamide) are added to the effluent, so that fine particles in the water form a plenty of alum flocs, and then the alum flocs precipitate to be separated in a precipitation tank, thus removing most oil and scum; the effluent from the precipitation tank automatically flows into a neutralization tank, the pH value is regulated to neutral and then the effluent enters a pressure dissolved air floatation tank used for removing the scum formed by the flocculated suspended matter particles or oil particles brought on the water surface from the wastewater; then the pollutants such as organic matters, ammonia nitrogen and the like are removed by the pretreatment+anaerobic+aerobic precipitation+sand filtration technology of an exclusively added backflow sludge contact reactor; finally the wastewater reaches discharge standard.

The invention discloses a device and a method for realizing sludge digestion fluid short-cut nitrification of continuous flow suspending media. The device is provided with a raw water tank, a denitrification filtering column, a suspending media reactor, a secondary basin and a water outlet tank, wherein the raw water tank is an open casing, the denitrification filtering column is a cylindrical tube, cubic suspending sponge filling materials are filled in the denitrification filtering column, the suspending media reactor is an open basin body with inner cavity divided into a plurality of grid chambers, cubic suspending sponge filling materials are filled in the grid chambers, further the suspending media reactor is equipped with a gas pump, a gas flow meter and an aerated conduit, the secondary basin is a column, and the water outlet tank is a open casing. The method for realizing sludge digestion fluid short-cut nitrification comprises starting the system and adjusting operation in running. The device and the method can save a large amount of denitrification carbon sources, increase denitrogenation efficiency of sewage disposal plants, and achieve the purpose of saving energy and lowering energy consumption.

The invention discloses an efficient AOAS integrated sewage treatment device and a process thereof. The efficient AOAS integrated sewage treatment device comprises a main body treatment facility, an aeration system and an automatic control system, wherein the main body treatment facility comprises an water feed pump at an inlet, and an anaerobic hydrolysis tank, a first stage reaction sedimentation tank, a second stage reaction sedimentation tank and an efficient flocculation and sedimentation tank, which are communicated in sequence through water flow; the aeration system comprises a blower, an air supply connecting pipeline and aeration plates respectively arranged at the bottoms of the first stage reaction sedimentation tank and the second stage reaction sedimentation tank. According to the device and the process disclosed by the invention, intermittent aeration, continuous water inflow, alternative aerobic environment and anaerobic environment are applied to a biochemical pool, thus the denitrification is obvious in the anaerobic environment; a reaction area and a sedimentation area are integrated in the biochemical pool and are divided by a division plate, so that no sedimentation tank needs to be additionally constructed, and no sludge reflux device is arranged; the biochemical reaction and sedimentation are integrated in the same pool structure, which breaks the inherent mode that two sedimentation tanks are separate from the biochemical pool, and thus the building is simpler; the operation of the inclined tube sedimentation tank is more stable.

The invention discloses an A / O reactor capable of achieving reflux without a pump. The A / O reactor comprises an anoxic tank, an aerobic tank, and a precipitation tank. A micropore aerator is arranged on the bottom of the aerobic tank; the bottoms of the anoxic tank and the aerobic tank are communicated with each other; the bottoms of the aerobic tank and the precipitation tank are communicated with each other; the precipitation tank can be divided into a precipitation buffer area and a precipitation area, the bottoms of the precipitation buffer area and the precipitation area are communicated with each other; an inclined cover plate is arranged on the aerobic tank, the end part of the higher end of the cover plate stretches out the anoxic tank and is provided with an overflow weir slot, and a water discharge weir plate is arranged in the middle of the cover plate. The provide self-circle A / O reactor utilizes the air lifting effect during the aeration process in the aerobic tank to bring the mixed liquid in the aerobic tank back to the anoxic tank so as to achieve the circulation of mixed liquid without a pump. At the same time, the bottoms of the precipitation tank and the aerobic tank are communicated, so that the sludge in the sludge hopper will be sucked into the aerobic tank when the mixed liquid in the aerobic tank is lifted up by the gas during the aeration process, thus the sludge reflux can be achieved without a pump, the energy is saved, and the nitrogen removal efficiency is improved.

The invention discloses an advanced wastewater treatment technology for sewage treatment and upgrading and reconstruction. The advanced wastewater treatment technology is a combined technology of an efficient settling basin and a riser fiber filter cloth filter tank added between a secondary sedimentation tank and a disinfecting tank of the original process of a sewage treatment plant; an efficient sedimentation tank is composed of two modules of a quick mixing region and an efficient sedimentation region; a FeCl3 chemical is fed to the quick mixing region so as to be agitated to react with sewage; the adding amount of the FeCl3 chemical is 5-8mg / L; the standing time of the quick mixing region is 1.5-2 minutes; the standing time of the efficient sedimentation region is 15-20 minutes; the standing time of the riser fiber filter cloth filter tank is 8-12 minutes; effluent of the secondary sedimentation tank is firstly processed by the efficient sedimentation tank, and then processed by the riser fiber filter cloth filter tank, finally achieves the first level A of discharge standard for sewage treatment after passing through the disinfecting tank. By adopting the advanced wastewater treatment technology, the problems that the efficient sedimentation tank process is independently used, so that effluent SS is unstable, and the filter cloth filter tank is independently used and thus phosphorus cannot be removed are effectively solved, a flocculating agent does not need to be excessively fed again, the dosing cost is greatly reduced, and fouling on an online monitoring instrument probe caused by feeding polyacrylamide (PAM) is avoided.

The invention provides a slack coal pressure gasification wastewater resourceful treatment method. The treatment method sequentially comprises the following steps of: (1) performing oil-water separation on the wastewater to obtain wastewater after the oil-water separation treatment; (2) treating the wastewater obtained by the step (1) by use of active sludge, and performing mud-water separation to obtain wastewater after the active sludge treatment; (3) adding an adsorbent into the wastewater obtained by the step (2), and performing solid-liquid separation to obtain wastewater after the adsorption separation treatment; (4) adding a flocculating agent and / or flocculation aid into the wastewater obtained by the step (3), and precipitating to obtain wastewater after the coagulation clarifying treatment; and (5) treating the wastewater obtained by the step (4) by use of a filter material loaded with microorganisms to obtain dischargeable / recyclable water. The invention also provides a system for the method to realize resourceful treatment on the wastewater, and application of the treatment method or treatment system in treating slack coal pressure gasification wastewater.

The invention relates to a reinforced-denitrification MBR (membrane bioreactor) sewage treatment method which comprises steps as follows: (1) pretreated town sewage enters an anoxic tank together with 300-400% of reflux precipitation tank sludge and 200-400% of reflux membrane tank nitrification solution, and denitrifying bacteria reduce nitrate nitrogen carried by reflux into nitrogen by using a carbon source in the sewage; (2) the effluent of the anoxic tank enters a precipitation tank to be subjected to sludge-water separation together with the refluxed membrane tank nitrification solution, part of the precipitated sludge refluxes to the anoxic tank, and the rest of sludge is discharged; and (3) the effluent of the precipitation tank enters a membrane tank to be nitrified so as to oxidize ammonia nitrogen into nitrate nitrogen, a pump extracts water from the membrane tank via the intervals of the membrane, and the effluent water is discharged or reused. The invention sufficiently combines the inherent characteristics of the MBR and MBBR (moving bed biofilm reactor) techniques, reduces the influence of the biological denitrification influencing factor, and has the characteristics of high denitrification efficiency, high denitrification stability, simple process and the like.

The invention relates to a compound functional primary settling tank. The compound functional primary settling tank is circular, the slope of the bottom of the compound functional primary settling tank is 0.01-0.02, the center of the bottom of the compound is connected with a water inlet pipe, a submersible water impeller is arranged at the bottom of the compound functional primary settling tank; a reflowing sludge pipe is arranged on the wall of the compound functional primary settling tank. According to the compound functional primary settling tank, through reconstructing a structure of the compound functional primary settling tank and regulating a treatment process, the primary settling tank can run according to manners of common settling, hydrolytic acidification, anaerobic phosphorus release and anoxic denitrification to adapt to changes of water temperatures and water quality, so that the treating effect of organic matter and nitrogen and phosphorus is improved. According to a system provided by the invention, the integral tank volume of a sewage plant can be reduced, and the operating energy consumption is reduced. Aerobic and anaerobic sections of a biological tank can be fully mixed so that SS concentrations of a mud-water mixture are basically consistent in all points in the tank. The compound functional primary settling tank is built by adopting a tank volume varying manner, the total biological treatment operating tank volume is determined according to the water quality condition and the operation need, so that the compound functional primary settling tank runs at a minimum tank volume; when no biological treatment is required, the compound functional primary settling tank runs according to a primary settling or hydrolysis manner with relatively low energy consumption, so that the electricity consumption is reduced.

The invention discloses an anaerobic-oxic (AO) high-efficiency nitrogen and phosphorus removal system. The AO high-efficiency nitrogen and phosphorus removal system is provided with a secondary sedimentation tank which is communicated with a sewage outflow end of a biological tank, wherein a first-level anoxic zone, an anaerobic zone, a first-level oxic zone, a second-level anoxic zone, a second-level oxic zone, a third-level anoxic zone, a third-level oxic zone, a fourth-level anoxic zone and a fourth-level oxic zone are arranged in the biological tank from sewage inflow to sewage outflow inturn; the secondary sedimentation tank comprises a sewage outflow port and a sludge reflux pipe; the sludge reflux pipe is communicated with the first-level anoxic zone in the biological tank, and isused for injecting reflux sludge into the first-level anoxic zone; sewage is injected from the upper sides of the first-level anoxic zone, the second-level anoxic zone, the third-level anoxic zone and the fourth-level anoxic zone from a sewage inflow port through pipelines respectively; stirrers which ensure that sediments are not generated in mixed liquid are arranged in the anoxic zones and theanaerobic zone from the first level to the fourth level; and the amount of the sewage which is injected into the first-level anoxic zone, the second-level anoxic zone, the third-level anoxic zone andthe fourth-level anoxic zone is 0 to 40 percent of inflow rate. By the AO high-efficiency nitrogen and phosphorus removal system, the concentration of the sludge in the subsequent levels is improved,the volume of the biological tank is reduced, and engineering investment is saved.

The invention relates to an environmentally friendly technology for treating printing and dyeing wastewater through a contact oxidation process. The technology concretely includes the following steps: printing and dyeing wastewater goes through a grid to remove large suspensions and floating substances, obtained wastewater enters an equalizing tank and undergoes water flow adjustment and quality balancing, obtained wastewater is lifted to a hydrolysis acidification tank through a pump, and the tank is only controlled in an acidic fermentation stage in order to improve the biodegradability of wastewater; hydrolysis acidification effluent self-flows to a contact oxidation tank and is acted by microbes in the contact oxidation tank to remove most organic matters and chroma, obtained water enters a sedimentation tank, and sludge in the sedimentation tank returns to the hydrolysis acidification tank; and an elastic stereo filler is arranged in the tank to control the dissolved oxygen (DO) in a range of 0-0.5mg / L. Compared with traditional technologies, the technology provided by the invention has the advantages of better treatment effect, low energy consumption, less mud production, and direct dehydration of residual sludge. A coagulation sedimentation tank and a decolorization oxidation tank are arranged behind the sedimentation tank to realize three stage treatment in order to obtain water with good quality, and parts of the outlet water can be reused in production. The combination technology improves the treatment effect of the printing and dyeing wastewater, and is practical.

The invention relates to technology for treating refractory organic wastewater, which comprises: performing oil and slag removal pretreatment on the organic wastewater; radiating the organic wastewater by microwaves, and generating micromolecules from macromolecules of organic molecules in the organic wastewater through chain fracture under the action of the microwaves; and performing biochemical treatment and ultrafiltration membrane separation on the organic wastewater which is subjected to microwave radiation treatment by adoption of a membrane bioreactor MBR, and obtaining water which can reach the emission standard. Compared with the prior biochemical technology, the technology can greatly reduce the capacity of a sewage biochemical tank, shorten the retention time of the biochemical treatment, and reduce the floor space and the construction investment of a project.

The invention discloses a stacked biological denitrification sewage treatment technology and device. The sewage passes through a primary sedimentation tank and is distributed by a water distribution system to the head ends of anoxic tanks in a stacked system consisting of multiple groups of anoxic tanks and aerobic tanks in cross series connection; the sewage sequentially flows through the anoxic tanks and aerobic tanks, and finally flows into a secondary sedimentation tank from the water outlets of the last group of aerobic tanks; after sludge-water separation in the secondary sedimentation tank, the water is discharged to the water outlets; one part of the sludge flows back to the head ends of the first group of anoxic tanks through a sludge backflow system; and the remaining sludge is discharged to a sludge drying treatment system through a sludge discharge system. Through the invention, an organic carbon source in the raw sludge is sufficiently used, the backflow facility in nitrification liquid and the energy are saved, the tank capacity is reduced, and the capital construction cost is lowered; and moreover, with high denitrification efficiency, the technology and device disclosed by the invention are suitable for the newly-built and rebuilt and expanded high-ammonia nitrogen sewage and municipal sewage treatment projects, and can reduce the sludge scouring caused by peak discharge, enhance the anti-impact load ability of the system, save the capital construction and operation cost and improve the total nitrogen removal efficiency.

The invention discloses an A2O (anaerobic-anoxic-oxic)-MBR (membrane bioreactor) sewage treatment device which comprises an anaerobic pool, an anoxic pool, an oxic pool and a membrane pool which are sequentially and mutually communicated, and the anaerobic pool and membrane pool are communicated. The invention also discloses a sewage treatment method as follows: pretreated sewage respectively flows into the anaerobic pool and the anoxic pool; the sewage flowed into the anaerobic pool is fully mixed with the mixed liquid flowed back from the anoxic pool for biochemical reaction; the mixed liquid passing through the anaerobic pool sequentially enters into the anoxic pool, and is fully mixed with the flowed-in pretreated sewage and the mixed liquid flowed back from the oxic pool; the mixed liquid passing through the anoxic pool respectively flows into the oxic pool and the membrane pool; the membrane pool mixed liquid partly flows back into a first corridor of the oxic pool for fully mixing with the mixed liquid flowed from the anoxic pool, then is pushed to flow into other corridors of the oxic pool, and then flows into the membrane pool. The A2O-MBR sewage treatment device organically combines A2O and MBR processes, better solves the defects existing in traditional A2O and MBR processes to improve effluent water quality, greatly reduces the system operating energy consumption, reduces the cost of sewage treatment, and achieves energy-saving emission reduction.

The invention relates to integrated wastewater treatment equipment of an IBR (integral biological reactor) and a treatment process. The integrated wastewater treatment equipment comprises four parts, i.e., an A / O biochemical tank, a reaction and gas release tank and a sedimentation tank, wherein the sedimentation tank is arranged between an A tank and an O tank, a pipeline communicating with the O tank is arranged at the bottom of the A tank, a mixed solution reflux and air-lift pump and a stirrer are arranged in the A tank, an aerator pipe and a reaction and gas release tank water intake and air lift pump are arranged in the O tank, a metering weir is arranged at a water inlet of the O tank, a water outlet of the reaction and gas release tank is connected with a water inlet of the sedimentation tank, the bottom of the sedimentation tank is provided with a sludge refluxing hole and a remaining sludge discharge pipe, and a water outlet of the sedimentation tank is formed in the top. The treatment process comprises six steps, i.e., carrying out A tank wastewater treatment, carrying out O tank wastewater treatment, refluxing a mixed solution to the A tank for treatment, carrying out reaction and gas release tank treatment, refluxing sludge to the A tank through the sedimentation tank, and carrying out sludge-water separation through the sedimentation tank. The integrated wastewater treatment equipment and the treatment process have the advantages that the design that multiple tanks are integrated and liquid level is increased in two steps is adopted, the number of power equipment is small, the floor area is small, and the operating cost is low.

The invention discloses an advanced wastewater treatment technology for sewage treatment and upgrading and reconstruction. The advanced wastewater treatment technology is a combined technology of an efficient settling basin and a riser fiber filter cloth filter tank added between a secondary sedimentation tank and a disinfecting tank of the original process of a sewage treatment plant; an efficient sedimentation tank is composed of two modules of a quick mixing region and an efficient sedimentation region; a FeCl3 chemical is fed to the quick mixing region so as to be agitated to react with sewage; the adding amount of the FeCl3 chemical is 5-8mg / L; the standing time of the quick mixing region is 1.5-2 minutes; the standing time of the efficient sedimentation region is 15-20 minutes; the standing time of the riser fiber filter cloth filter tank is 8-12 minutes; effluent of the secondary sedimentation tank is firstly processed by the efficient sedimentation tank, and then processed by the riser fiber filter cloth filter tank, finally achieves the first level A of discharge standard for sewage treatment after passing through the disinfecting tank. By adopting the advanced wastewater treatment technology, the problems that the efficient sedimentation tank process is independently used, so that effluent SS is unstable, and the filter cloth filter tank is independently used and thus phosphorus cannot be removed are effectively solved, a flocculating agent does not need to be excessively fed again, the dosing cost is greatly reduced, and fouling on an online monitoring instrument probe caused by feeding polyacrylamide (PAM) is avoided.

The invention relates to an environmental protection method for treating printing and dyeing wastewater. The method specially includes the following steps that after large suspended substances and floating substances are removed through gratings, the printing and dyeing wastewater enters a first treating column to conduct oxydative degradation on hazardous substances; a coagulant aid is added intothe printing and dyeing wastewater after oxidation treatment to conduct secondary biochemical treatment on the printing and dyeing wastewater, the wastewater after oxydative degradation is conveyed to a regulating pool, regulating of water volume and balance of water quality are conducted in the regulating pool, then the wastewater is lifted to a hydrolysis acidification pool by using a pump, yielding water of hydrolytic acidification automatically flows into a contact oxidation pool, after most of organic matter and chroma are removed in the contact oxidation pool through microbial action, and water flows into a sedimentation pool where elastic space packing is placed, wherein the contact oxidation pool is used in the principal process of printing and dyeing wastewater treatment, the elastic space packing and semi-flexible combined packing are placed in the contact oxidation pool, and the bottom of the contact oxidation pool is aired by adopting micro holes; for the printing and dyeing wastewater, after coagulation sedimentation treatment is conducted on the printing and dyeing wastewater containing sulfur dyes and naphthol dyes, if yielding water still has dark color, further decoloration has to be conducted.

The invention discloses an adjustable biological aerated filter. The adjustable biological aerated filter comprises a tank body, wherein a precise filter board, a filter material layer and a filter material layer adjusting control board are arranged on the tank body from bottom to top in sequence, so that the tank body is divided into a water distributing region below the precise filter board and a clear water region above the filter material layer adjusting control board; the water distributing region is communicated with a water inlet tube; a water outlet slot is arranged on the upper part of the clear water region; the water outlet slot is communicated with a water outlet tube; nanometer microcrystal filter material is placed in the filter material layer. The adjustable biological aerated filter can be used for controlling and adjusting the height of the filter material layer by adopting the filter material layer, so that the reaction region height can be adjusted according to inlet water ammonia-nitrogen change, and therefore, the adjustable biological aerated filter has stable outlet water quality.

The invention provides a discoloration process for dyeing and weaving wastewater treatment. The discoloration process for treatment comprises steps as follows: S1, production wastewater is introducedinto an adjusting tank, and sewage is homogenized and averaged through the adjusting tank; S2, a homogenized and averaged waste liquid is introduced into an anaerobic oxidation channel for hydrolyticacidification; S3, the hydrolyzed waste liquid is introduced into a primary settling tank for sludge-water separation; S4, a supernatant liquid in the primary settling tank is sent into an aerobic oxidation channel for organic matter decomposition; S5, the treated mixed liquid is introduced into a secondary settling tank for secondary sludge-water separation; S6, a supernatant liquid in the secondary settling tank is sent into a final sedimentation tank, and a treating agent is added for coagulating sedimentation until the liquid meets the discharge standard. Through hydrolysis and acidification action of anaerobes in the tank, part of macromolecular organic matter in water is degraded into micromolecular organic matter, the biodegradability of the sewage is improved, chromophoric groups of some dye molecules are broken through, and the chromaticity of the sewage is reduced.

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

The biological sewage treating process by means of fiber membrane fixed organism includes the following steps: 1. weaving fibrous biological membrane carrier with Dacron filament and attaching active microbial sludge for sewage treatment to the surface of the fiber; and 2. setting the fibrous biological membrane carrier in anaerobic or aerobic reactor, and soaking the carrier in industrial sewage over aerator and basic device so that the ascending bubble can provide organism with sufficient oxygen. The present invention has high sewage treating efficiency, stable performance, low power consumption, long service life and other advantages.

The invention belongs to the technical field of environment protection and particularly relates to an environment-friendly method for treating printing and dyeing wastewater. The method specifically comprises the following steps that printing and dyeing wastewater passes through gratings to remove large suspended solids and flotage, then enters a regulating pool and then is lifted to a hydrolysis acidification pool with a pump; effluent obtained after hydrolysis acidification automatically flows into a contact oxidation pool, most organic substances and the color scale are removed in the contact oxidation pool through the microbial action, and then the effluent enters a settling pool; organic substances are removed, the contact oxidation pool serves as the body process of printing and dyeing wastewater treatment, elastic stereo filling and semi-soft combined filler is put in the pool, and the color scale is removed; after the printing and dyeing wastewater is treated through coagulating settling, further decoloring is needed if the effluent is still dark in color, and the method is used for solving the problem that the standard is difficult to meet with the current treatment technology.

The invention discloses a rural domestic sewage composite ecological purification system, which comprises a water inlet well, a primary sedimentation tank and an aeration regulating tank, wherein a grid is obliquely arranged in the primary sedimentation tank, the water outlet of the aeration regulating tank is respectively connected with an artificial subsurface flow wetland and buried integratedsewage treatment equipment in parallel, the sludge outlets of the artificial subsurface flow wetland and the buried integrated sewage treatment equipment are connected with a sludge tank, the water outlet of the buried integrated sewage treatment equipment is communicated with an integrated equipment produced water treatment system, and the water outlet of the integrated equipment produced water treatment system and the water outlet of the artificial subsurface flow wetland are respectively communicated with big pits. According to the invention, a stable purification effect can be exerted throughout the year, the problem that existing rural constructed wetlands do not reach the standard in winter treatment or are difficult to operate and manage is solved, the system can be communicated with a matched sewage collection pipe network in a village, the problem that rural domestic sewage discharge does not reach the standard is solved, treated water reaches the standard and is discharged into nearby drainage ditches or used for farmland irrigation, water resources are fully utilized, and meanwhile ecological and ecological benefits are remarkable.

The invention discloses a shallow aeration biological filter basin which comprises a basin. The basin is sequentially provided with a perforated water distribution plate, a supporting layer and a filter material layer from bottom to top, so that the basin is divided into a water distribution zone and a clear water zone, the water distribution zone is positioned below the water distribution plate, and the clear water zone is positioned above the filter material layer; the water distribution zone is communicated with a water inlet pipe; a water outlet groove is formed in the upper portion of the clear water zone; the water outlet groove is communicated with a water outlet pipe; nano-micro-crystal compound filter materials are arranged in the filter material layer; the total height of the basin is 3-4.5 meters; the supporting layer is provided with nano-micro-crystal compound filter materials, and the diameters of the nano-micro-crystal compound filter materials of the supporting layer are larger than the diameters of the nano-micro-crystal compound filter materials of the filter material layer. The shallow aeration biological filter basin has the advantages that the nano-micro-crystal compound filter materials have abundant inherent pores and are reasonable in pore diameter distribution, accordingly, biological membranes are quite firm after being formed and are difficult to damage due to backwash, the biological treatment stability can be guaranteed, the shallow aeration biological filter basin is bravely designed, the construction cost can be greatly reduced, enhancement can be omitted, and energy consumption can be reduced to a great extent.

The invention discloses NISS (No Inner circumference with Stepfeed System) phosphorus and nitrogen removal automatic control device and process, belonging to the technical of deep biological phosphorus and nitrogen removal from sewage. A touch screen PLC (Programmable Logic Controller) automatic control cabinet of the device is connected with a water feed pump, an online COD (Chemical Oxygen Demand) analyzer and the like in the NISS phosphorus and nitrogen removal device, the feed water concentration and related parameters in the phosphorus and nitrogen removal system are effectively controller, and unmanned operation is realized in the treatment process. The carbon source in original water is utilized to the maximum extent by feeding water in two steps, so that the biological phosphorus and nitrogen removal of sewage can be realized without adding extra carbon sources, and the cost is reduced. Because online monitoring is adopted, the parameters of water feed quantity and the like can be automatically adjusted, so that the impact and load resistance of the entire system is improved. By automatically adjusting the current of a matched air blower for controlling the concentration of dissolved oxygen, the wastage of electrical energy under the condition of low water feed quantity is avoided, the operating cost of water plants is effectively lowered, and meanwhile, the effects of saving energy and reducing consumption are achieved.

The invention discloses an A2N-SBR (anaerobic / anoxic / nitrification-sequencing batch reactor) improved deep denitrification and dephosphorization technology of sewage and belongs to the technical field of biological sewage treatment. The technology comprises the steps: performing anaerobic reaction on the domestic sewage in an A2 / O-SBR, adding nitrification liquid into the A2 / O-SBR (anaerobic / anoxic / oxic-sequencing batch reactor) for denitrification and dephosphorization reaction under an oxygen deficient condition, after transitory aerobic treatment, standing for layering, discharging supernate, putting the supernate in an N-SBR with polypropylene suspension filling for shortcut nitration reaction under an aerobic condition, then standing, and obtaining supernatant, namely the nitrification liquid. According to the technology, granule sludge is coupled with a shortcut denitrification and dephosphorization technique in the A2N-SBR; the tank capacity is reduced; the reaction time is shortened; the floor area is saved; and at the same time, economical and high-efficiency deep denitrification and dephosphorization are achieved. The technology is applicable to the treatment of the nitrogenous and phosphorous municipal domestic sewage.

The invention discloses an anti-cavitation microaerobic denitrification reactor, which comprises a denitrification reactor and a secondary sedimentation tank. A microporous aeration device and a water distribution pipe network are arranged at the bottom part of the denitrification reactor; a water inlet pipe is externally connected to the water distribution pipe network; a circulating water pipe is arranged outside the denitrification reactor; a circulating pump is arranged on the circulating water pipe; one end of the circulating water pipe is connected into the denitrification reactor; the other end of the circulating water pipe is connected to the water inlet pipe; a baffle plate for blocking air bubbles is arranged at a connecting position of the circulating water pipe and the denitrification reactor; a second water outlet is formed in the top part of the secondary sedimentation tank; a sludge recirculatory pipe is arranged between the denitrification reactor and the secondary sedimentation tank; one end of the sludge recirculatory pipe is connected to the bottom part of the secondary sedimentation tank; the other end of the sludge recirculatory pipe is connected into the denitrification reactor. The technical scheme is used for solving the problem that a carbon source and alkalinity need to be additionally supplemented due to a complex technological process in an existing sewage denitrification process.