67results about How to "Good denitrification effect" patented technology

The invention relates to an aerobic denitrification methylobacterium phyllosphaerae strain and application thereof. The aerobic denitrification strain is methylobacterium phyllosphaerae SDN-3CGMCC No.3660. The strain can be used for carrying out aerobic denitrification by using nitrate nitrogen and can also be used for carrying out hetetrophic nitrification-aerobic denitrification by using ammonia nitrogen, under aerobic and limited-oxygen conditions. The strain is stable in genetic character, and can be used for realizing synchronous nitrification-denitrification and independently completingthe whole process of biological denitrification. The strain is used for treating various nitrogen-containing wastewater by needing only one aerobic stage, the process is simple and the denitrification efficiency is high.

The invention discloses a monolithic cellular catalyst for SCR smoke denitration, which adopts TiO2 powder as a substrate. The catalyst is added with active ingredients and additive at the same time. The active ingredients comprise TiO2, WO3, MoO3, V2O5, ZrO2 and MnO2. The additive comprises water reducer, binder, pore-forming agent, extrusion assistant and glass fiber. The invention further discloses a preparation technology for the monolithic cellular catalyst for SCR smoke denitration, comprising the following steps: dry mixing, kneading and pugging to obtain a mud section with good plasticity and a compact structure; extruding to obtain the blank of the monolithic cellular catalyst; drying and baking to obtain the monolithic cellular catalyst for SCR smoke denitration. The invention has simple preparation technology, greatly reduces the water quantity during the kneading process through adding the water reducer which is adopted as one active ingredient, reduces the maintaining conditions of the catalyst after being formed, and improves the strength, abrasion resistance and yield for forming the catalyst.

The invention discloses an integral multistage internal recycle nitrating-denitrifying biological denitrifying fluid-bed reactor, which comprises the following parts for the open structured case space from downward to upward: fluid reacting zone with anoxic zone, high-density aerobic zone, low-density aerobic zone, three-phased separating zone, wherein the adjacent zones interconnect mutually; the anoxic zone, high-density aerobic zone, low-density aerobic zone of fluid reacting zone is formed by zone baffle on the cylinder body of the reacting zone; each circulating baffle is set each fluid reacting zone to make the interval flow form interval circulation filled with porous polymer macromolecular carrier when operating; three-phased separating zone is composed of separating zone cylinder, upper and lower separating cylinders in the cylinder and water outlet weir between the cylinder and separating cylinder, which discharges the purified water through water outlet weir and the degas into the atmosphere through open.

The invention discloses a device and a method for realizing sludge digestive fluid advanced nitrogen removal by a three-section type short-cut nitrification- anaerobic ammonia oxidation-short-cut denitrification process. Sludge digestive fluid firstly enters a short-cut nitrification reactor, residual nitrite from the last cycle is removed by sufficiently utilizing organic substances in the digestive fluid through anoxic stirring and then aeration is performed to carry out partial nitrification; effluent containing nitrite is mixed with another part of the sludge digestive fluid to obtain a mixture, the mixture enters an anaerobic ammonia oxidation reactor for denitrification, and effluent enters the short-cut denitrification reactor, so that nitrate generated in an anaerobic ammonia oxidation reaction process is converted into nitrite, and the nitrite flows back into the anaerobic ammonia oxidation reactor so as to be further removed together with ammonia nitrogen in raw material. According to the device and the method, excessive nitrate in the effluent of the anaerobic ammonia oxidation reactor is reduced into a substrate nitrite needed for anaerobic ammonia oxidation reaction; and moreover, carbon source consumption is low, sludge yield is low, and a three-section type reactor can beflexibly controlled, and is suitable for advanced nitrogen removal of wastewater with high ammonia nitrogen and a low carbon-nitrogen ratio.

The present invention provides a treatment technics and application to wastewater with high ammonian and low C/N ratio. The technics adopts a compound technics of ''pretreatment plus immobilized microorganism-biological aerated filter''. Firstly, the wastewater enters the S section of the compound technics and most of the suspended substances and part of the COD are removed to prevent the suspended substances in the wastewater from plugging the filter materials in IBAF and guarantee the stable operation of the subsequent IBAF technics. The yielding water of the S section enters the IBAF biological treatment technics to remove most ammonian and COD in the wastewater and the yielding water can be discharged out directly or recycled after a proper depth treatment. Compared with the prior art, the present invention has the advantages of simple S-IBAF technics, good denitriding effect, small area occupancy, low operation cost, low mud output and convenient operation and management. The present invention has the applications that the present invention not only has specific effects on compounding the industrial wastewater of ammonia and nitrogenous fertilizer, the industrial wastewater of the coal combined methanol, the wastewater of leather, the corn deep processing of the food industry, the wastewater treatment and alteration in the monosodium glutamate industry, but is also suitable for other treatment technics and application to wastewater with high ammonian and low C/N ratio.

The invention relates to a water-treatment device. The water-treatment device comprises a grating channel, a grit chamber, a biological rotating disc and a depth treatment system, wherein the grating channel, the grit chamber, the biological rotating disc and the depth treatment system are successively connected in series. The water-treatment device is characterized in that a self-priming pump is arranged outside the grit chamber, a water inlet of the self-priming pump is connected with a flexible pipe, and a water inlet of the flexible pipe is provided with a filtering nozzle; the filtering nozzle is connected with a floating ball, an outlet of the self-priming pump is connected with an inlet of a separation box, and an outlet of the separation box is connected with a water channel of the biological rotating disc through a water carrying pipeline; the biological rotating disc is positioned on the upper part of the water channel, and part of a biological disc piece is soaked in the lower part of a liquid surface of the water channel; a reflux pump is arranged outside the water channel, an inlet of the reflux pump is positioned in the middle of the water channel, and an outlet of the reflux pump is positioned in the bottom of the water channel; an outlet of the water channel is connected with an inlet of the depth treatment system. Compared with the prior art, the water-treatment device provided by the invention has the advantages that the peculiar smell is not generated, mosquitos and flies are not bred, the sludge output is small, the biological disc piece adopts a concave-convex plate, and the biomass is high; the whole denitrification effect is excellent; the total energy consumption is low; a condition that the water quality effluent can steadily achieve a standard is effectively guaranteed; the water-treatment device has the advantages that the structure is compact, and the operation and management are simple and convenient.

Belonging to the technical field of low temperature SCR denitration, the invention discloses an active carbon loaded iron-based low temperature SCR denitration catalyst, a preparation method and application method thereof. The preparation method includes: taking grinded activated carbon as the carrier, using an Fe oxide as the main active component, adding trace Mn or Co as the active assistant respectively, loading the active component on the carrier by impregnation method, then conducting magnetic stirring and drying treatment, and finally performing roasting in air atmosphere, thus obtaining the low temperature SCR denitration catalyst. The low temperature SCR denitration catalyst provided by the invention has the characteristics of convenient production, simple use, and good denitration effect at low temperature, can well solve the problems of low denitration efficiency and slightly high use temperature section in existing denitration catalysts, thus being conducive to prolonging the service life of the catalyst, and saving cost.

The invention discloses a method for enhancing the biological denitrogenation effect of constructed wetland. According to the invention, a carbon source slow-release apparatus is arranged at a front end of the constructed wetland, sewage passes through the carbon source slow-release apparatus, and then is introduced into the constructed wetland; the external part of the carbon source slow-release apparatus is formed by a netted framework structure, and the agricultural waste is provided in the internal part of the carbon source slow-release apparatus. The agricultural waste is placed at the front end of the constructed wetland, by controlling the adding rate of the agricultural waste and blending ratio, the slow release effect of the agricultural waste is used for providing a carbon source for denitrification and nitrogen removal for the constructed wetland, so that the total nitrogen removing rate of the constructed wetland is increased.

The invention relates to high-entropy alloy powder with low nitrogen content as well as a preparation method and application thereof and belongs to the field of additive manufacturing. The preparationmethod comprises the following steps: carrying out first-time smelting and second-time smelting on a material for providing the element of a first element group for high-entropy alloy raw material, adding the material for providing the element of a second element group, carrying out second-time smelting and third-time smelting, and then pouring and atomizing. The first element group comprises atleast two selected from Ta, Co, W, Mo, Fe, Ni, Cr, Cu, Ce, Re and Nb; and the second element group comprises at least one selected from TI, B, Zr, Mn and Al. The preparation method is simple and convenient to operate and easy to realize and has a high denitrification effect. The high-entropy alloy powder obtained through the preparation method is low in nitrogen content and is used for 3D printingto improve the mechanical property and product quality of a formed component.

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 functional biological fixation in-situ remediation method for underground water polluted by nitrogen, belonging to the field of underground water remediation. The method comprises the following steps of: preparing immobilized materials; separately gathering autotrophy denitrifying bacteria; immobilizing microbes; and carrying out embedding and running processing on an immobilized carrier in the well completion process. The immobilized materials are obtained by selecting an optimal carrier material to prepare an adsorbent, and the denitrifying microbes are gathered from a primitive environment, immobilized and then placed into the primitive environment, the bacteria is ensured to exist and propagate in a stratal environment and the reaction residence time is controlled by controlling the water yield of a pumping well, thereby achieving the optimal denitrifying effect; in addition, the invention has obvious demonstration effect on processing the nitrogen-pollution of the underground water and good processing effect and is suitable for being popularized to wide underground water regions polluted by nitrogen.

The invention belongs to the technical field of sewage treatment, and concretely relates to a multilevel compound coupling artificial wetland system and its application. The system comprises a monomer wetland bed subsystem, a hydrodynamic modulation subsystem and a wetland coupling subsystem. A monomer wetland bed is divided into an underflow monomer wetland bed and a surface flow monomer wetland bed, three matrix layers are arranged in the monomer wetland bed, and water plants are planted in matrixes; and the hydrodynamic modulation subsystem comprises a water distribution and collection system. The underflow monomer wetland bed and the surface flow monomer wetland bed form the main body of the coupling subsystem, and different treatment modes comprising series connection, parallel connection, series-parallel connection and the like can be formed through opening different adjustment valves. Different types of sewage treatment units are formed through constructing different types of wetland beds, and the sewage treatment units are optimally combined to form the system, and sewage is treated in a multi-level grading manner to improve the sewage purifying capability of the artificial wetland.

The invention relates to a method for treating kitchen wastes by utilizing photosynthetic bacteria and recycling the kitchen wastes. The method particularly comprises a kitchen waste pretreating method which includes carrying out hydrolysis acidification treatment on the kitchen wastes until the concentration of volatile fatty acid is up to be 5000-15000mg/L to obtain hydrolysis acidification liquid, performing solid and liquid separation on the hydrolysis acidification liquid, adjusting the pH value of the liquid to be 6.5-7.5 to obtain a pretreated material, and a method for culturing the photosynthetic bacteria by using the pretreated material, which comprises the following steps of: inoculating 100-1000mg/L of a photosynthetic bacteria flora in the pretreated material and culturing the photosynthetic bacteria flora for 3-5 days under conditions that the illuminance is 1500-5000lux, the temperature is 25-35 DEG C and the dissolved oxygen concentration is 0-0.8mg/L. A product obtained by using the method can be used for preparing feed additives, water purification agents, ecological organic fertilizers or aquaculture baits. The method is strong in poison resistance capability for treating the kitchen wastes, good in denitrification and high in organic matter removal capability.

The invention discloses a controllable subsurface artificial wetland sewage treatment system with inflowing at the two ends periodically and alternately and a treatment technology thereof. The system comprises a wetland inlet water distribution area, a wetland body part and a wetland outlet water collection area, wherein the water distribution area and the water collection area are positioned at the two ends of the whole system and form a symmetrical structure; the wetland body part is positioned between the wetland inlet water distribution area and the wetland outlet water collection area. Water inlet pipes are embedded in the upper parts of the walls on the side surfaces of the wetland inlet water distribution area and the wetland outlet water collection area, and more than two lines of water out pipes which are parallel with one another are embedded in the walls below the water inlet pipes. The wetland body part comprises a wetland matrix padding positioned at the bottom of the body part and economic plants planted on the wetland matrix padding. The sewage treatment system improves the growth conditions with obvious difference caused by uneven concentrations of nutrients of the plants at the front end and the rear end of a wetland in the traditional wetland system by periodically changing wetland water inlet points, and obtains good economic benefit while realizing the recycling of nitrogen and phosphorus in sewage.

The invention discloses a biomembrane denitrification method for nitrogen containing sewage. A biomembrane denitrification reactor has the structure described as follows: a transversal plate (a), a vertical plate (b), a vertical plate (c) and a transversal plate (d) are arranged in a reactor, wherein the transversal plate (a) divides the reactor into an upper part and a lower part, wherein the lower part is a hydrolytic acidification zone and the upper part is an A/O zone. The A/O zone is divided into three parts by the vertical plate (b) and the vertical plate (c), wherein the three parts successively are an aerobic zone (O), a transition zone and an anaerobic zone (A). The lower end of the vertical plate (b) is sealedly connected to the transversal plate (a). A water passing gap is formed between the upper end and the top of the reactor. The upper end of the vertical plate (c) is sealedly connected to the top of the reactor. A water passing gap is formed between the lower end of the vertical plate (c) and the transversal plate (a). The left end of the transversal plate (d) is sealed connected to the bottom of the vertical plate (c), while the right end is connected to a wall of the reactor. The transition zone is filled with sponge iron deoxidant granules. In sewage treatment, sewage is fed from the bottom of the reactor, and successively passes through the hydrolytic acidification zone, the aerobic zone, the transition zone and the anaerobic zone, and is discharged from the upper part. In the reactor, biomembranes in the zones are cultured independently, so that the biomembranes having special functions can be cultured better. The reactor has high biomembrane forming speed and has good denitrification effect.

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 method for strengthening purification of bottom mud through an iron-carbon positive electrode microbial fuel cell. Pollutants in the bottom mud can be effectively removed, through the further utilization of an online monitoring technology, the microbial fuel cell generates electricity to monitor the condition of water quality, and subsequent monitoring and treatment of the water quality are facilitated. According to the technical scheme, a microbial fuel cell system is utilized, iron-carbon micro-electrolysis filler and a biological negative electrode ribbon are coupled, desilting for a river channel is not needed, the microbial fuel cell is suitable for various water quality conditions, simple in structure and easy to construct, has good effects of removing organic matter in water, removing nitrogen and the like, and is suitable for river channel regulation, secondary pollution caused by the bottom mud is reduced, and the method is an innovation in bottom mud pollution regulation methods.

The invention discloses a moving bed biofilm reactor and its sewage treatment method. The biofilm reactor comprises a tank body, an inlet water barrel, a peristaltic pump, an aeration sand head and an air aeration machine, the tank body is filled with a filler, the filler is a K3 filler, the diameter and the height of the K3 filler are 2.5cm and 1.1cm respectively, the material of the K3 filler is polypropylene, the filling rate of the filler in the tank body is 40%, and the reactor also comprises a time controller in order to control the on/off and the running time of the peristaltic pump, the air aeration machine and a water outlet solenoid valve. Compared with the prior art, the sewage treatment method disclosed in the invention has the advantages of realization of aerobic and anoxic environment in a same reactor, realization of a synchronous nitrification and denitrification process in a single reactor, organic load and aeration rate reduction, capital construction and operation cost reduction, and reaching of a good nitrogen removal effect.

The invention discloses a technology of synchronous removal of nitrogen, phosphorus and suspended solids. The technology comprises the following steps: during the filtration process, raw water is filtered downwards under the action of gravity, sequentially passes through a biological filter material layer, a fine filtration layer, a supporting layer and a filter head, and is discharged from the bottom; during the nitrogen removing process, water inflow is stopped, the liquid level is lowered, backwashing water is distributed through the filter head, the distributed backwashing water is introduced upwards into the biological filter material layer, and the accumulated nitrogen bubbles in the filter material are removed; during the backwashing process, uniform distribution of gas and water is carried out through the filter head, water is introduced into the biological filter material layer, and the biological filter pond is cleaned. The technology has the advantages of being large in hydraulic loading, small in occupied area, good in removing effects of nitrogen and phosphorus and suspended solids, good in effluent quality and simple in operation and maintenance.

The invention relates to a pollution gas treatment system and treatment method based on a chemical looping combustion principle; the pollution gas treatment system includes a first chemical looping combustion reactor, a second chemical looping combustion reactor, gas pipelines and three-way valves; the chemical looping combustion reactors are filled with oxygen carriers; the gas pipelines include a pollution gas pipeline, an air pipeline, a reduction reaction product gas pipeline and an oxidation reaction product gas pipeline; pollution gas contains hydrogen sulfide and other sulfur compounds or ammonia, trimethylamine and other amines. The treatment method includes the following steps: the pollution gas and the oxidation-state oxygen carrier undergo a reduction reaction, oxygen and the reduction-state oxygen carrier or metal sulfides undergo an oxidizing regeneration reaction, when the gas concentration in the two chemical looping combustion reactors reaches a set value, the three-way valves are switched, and treatment goes into a next cycle. The oxygen carriers with suitable oxidation ability are selected, in the process of pollution gas treatment, NOx is not generated, SO2 can be captured, the treatment conditions are easy to control, and the device and the method are more suitable for practical application.

The invention discloses a process method and device for advanced treatment of nitrate nitrogen in water, and belongs to the field of nitrate nitrogen wastewater treatment processes. Nitrate nitrogen wastewater is absorbed through a macromolecular nitrate nitrogen adsorbent to obtain nitrate-removed effluent, and the nitrate-removed effluent is discharged after the nitrate-removed effluent is detected to reach the standard; when the effluent does not reach the standard, a sodium chloride solution with the mass percentage concentration of 35% is added into the macromolecular nitrate nitrogen adsorbent for regeneration, a self-activity denitrification process is conducted after obtained regenerated waste liquid is diluted, and the effluent obtained after the self-activity denitrification process is sequentially subjected to ultrafiltration, reverse osmosis and electrodialysis concentration to serve as fresh regenerated liquid; and both the reverse osmosis fresh water and the electrodialysis fresh water are used as diluents of regenerated waste liquid. The process is high in automation degree, easy to manage, small in equipment investment and low in operation cost. According to the method, the macromolecular nitrate nitrogen adsorbent is adopted to adsorb nitrate nitrogen in the water, the regenerated waste liquid is filtered out through self-activity denitrification, and the method has the advantages that no waste liquid or waste gas is discharged, and the process cleanliness is high.

The invention provides an integrated A/O/MBBR (Moving Bed Biofilm Reactor) reactor with denitriding function. The integrated A/O/MBBR reactor comprises a circular barrel body, a water inlet distributing device, suspension fillers, a submersible centrifugal aerator, suspension fillers and an air inlet pipeline; the circular barrel body is separated into an anoxic area, an aerobic area, a flow guide area, a mud-water separating area and a water collecting area by a plurality of concentric cylindrical partition plates; the water inlet distribution device is arranged at the upper part of the anoxic area; the suspension fillers are arranged in the middle part of the anoxic area; the submersible centrifugal aerator is arranged at the bottom part of the anoxic area; the suspension fillers are arranged in the middle part of the aerobic area; and the air inlet pipeline is connected with an air inlet of the submersible centrifugal aerator.

The invention belongs to the field of microorganism application, and specifically relates to a strain of bacillus megaterium P5-2 and a separation method and application thereof. The bacillus megaterium P5-2 is preserved in the Guangdong Microbial Culture Collection Center on January 7th, 2019, and the preservation number is GDMCC NO.60536. The bacillus megaterium is high in growth speed, denitrification efficiency and environmental adaptability and has no damage to aquatic products, the ammonia nitrogen removal rate under oligotrophic conditions is 60% or above, and ammonia nitrogen in waterand nitrite nitrogen can both be removed. When the bacillus megaterium is used as a nitrogen removal agent, since the bacillus megaterium has no damage to the aquatic products, the bacillus megateriumis particularly suitable for removing nitrogen from the aquaculture water.

The invention relates to the technical field of papermaking flue gas denitration and in particular relates to a denitration system. The denitration system comprises a DCS controller, a urea dissolving tank, a urea solution storage tank, a urea high-pressure pump, a urea regulation valve, a mixer, a spray gun, a return feeder and a chimney, wherein the urea dissolving tank, the urea solution storage tank, the urea high-pressure pump, the urea regulation valve, the mixer, a spray gun, the return feeder and the chimney are sequentially connected with one another; the DCS controller is respectively connected with the urea dissolving tank, the urea solution storage tank, the urea high-pressure pump and the urea regulation valve in a controlling mode; the chimney is internally provided with an oxynitride concentration detection circuit, the oxynitride concentration detection circuit is used for acquiring a concentration signal of oxynitride in flue gas of the chimney in real time and sending the concentration signal of the oxynitride in the flue gas of the chimney to the DCS controller, and the DCS controller is used for controlling the chimney to discharge the flue gas according to the concentration signal of the oxynitride in the flue gas of the chimney. The denitration system has the advantages of ideal denitration effect, high denitration efficiency, small loss in flue gas discharge of a boiler, and low production cost.

The invention relates to an annular flue gas denitrification device for a sandwich hearth, and belongs to the technical field of waste gas treatment. The obtained annular flue gas denitrification device for the sandwich hearth cannot cause the phenomenon of flue gas mixing leakage treatment, flue gas to be treated enters into a denitrification hearth uniformly in all directions from the bottom ofa hearth sandwich and an annular flue gas inlet, the air inlet distribution is uniform, the contact of spiral flue gas and a denitrification catalyst coating is more sufficient, and the contact time is also more sufficient, so that the denitrification effect is obvious, smoke inside flue gas can be oscillated and removed by an oscillation resistance dust filter gauze, and even if a part of smoke dust is not removed, the unremoved smoke dust can be thrown away by rotating centrifugal force after being in contact with a furnace assembly, so that dust deposition blockage cannot occur, the abrasion for the catalyst coating is also low, through an experiment, the denitrification rate of the device for flue gas can reach 90% or more, the content of smoke dust with the grain diameter of greater than 200 meshes in flue gas is lower than 2%, and the device has wide application prospects.

The invention relates to light-driven waste water nitrogen-removal method and equipment. The method is characterized in that a semiconductor photoanode, a resistor and a biological cathode of a nitrogen-removal biomembrane attached with electrodephile breathing are connected in series to form a nitrogen-removal circuit, the method comprises the following steps: introducing the to-be-processed sewage containing nitrate in a cathode chamber of electrochemical equipment; light irradiates the surface of the semiconductor photoanode to generate photo-induced electron; the photo-induced electron is conducted to biological cathode, the nitrogen-removal biomembrane attached with electrodephile breathing is used to complete nitrogen removal. According to the invention, light is taken as the only energy and electron source for microbe nitrogen removal, an electron donor is not added for exogenous part, extra electric energy is not required; the biological cathode is attached with the nitrogen-removal biomembrane attached with electrodephile breathing, microbe is taken as a catalyst for denitrification, and the method has the advantages of low cost, environmental protection and continuous development.

The invention discloses a V-shaped filter tank for deep denitrogenation. The V-shaped filter tank comprises a V-shaped water inflow channel, a back washing drainage channel, a filter tank body, a back washing air inlet pipe, a back washing water inlet pipe and a water outlet pipe, wherein the water inflow channel is arranged at the top of the filter tank body; the filter tank body is filled with a filter material; the bottom of the filter tank body is filled with a bearing layer; filter plates and filter heads are mounted at the bottom of the filter tank body; the back washing air inlet pipe, the back washing water inlet pipe and the water outlet pipe are arranged at the bottom of the filter tank body. The V-shaped filter tank has the advantages that the water power load is low; the occupied area is small; the nitrogen and phosphorus removal effects are high; the suspended matter removing effect is high; the effluent quality is excellent; the running and the maintenance are simple.

The invention provides a system and a method for realizing partial anaerobic ammonia oxidation deep nitrogen and phosphorus removal through biological membrane circulation alternation in mainstream and sidestream regions of an urban sewage treatment plant. The system comprises three main composition units, namely a main flow area (a), a deep treatment area (b) and a side flow area (c), wherein deep nitrogen and phosphorus removal of the whole system is realized through biological membrane circulation alternation, in the main flow area (a), an anaerobic/anoxic area is mainly used for heterotrophic denitrification nitrogen removal and short-cut denitrification/anaerobic ammonia oxidation autotrophic nitrogen removal, and an aerobic area is mainly used for removing organic matters, performingaerobic phosphorus absorption and completing nitration reaction, in a denitrification fluidized bed (8) in the deep treatment area (b), deep treatment is performed on a mixed solution of effluent andraw water in the main flow area to realize heterotrophic denitrification and short-cut denitrification/anaerobic ammonia oxidation autotrophic nitrogen removal, and a high-ammonia-nitrogen anaerobicammonia oxidation denitrification area (7) in the side flow area (c) is used for enriching anaerobic ammonia oxidizing bacteria based on a biological membrane, so that autotrophic denitrification of the side flow high-ammonia-nitrogen wastewater is realized.

The invention relates to a coal water slurry combustion desulfurization and denitration process, which comprises the following steps: carrying out a pretreatment on coal water slurry, and adding a denitration agent to the coal water slurry; paving a bed material media on an air distribution plate, wherein the bed material media comprises quartz sand and has a thickness of 300-500 nm; injecting the obtained coal water slurry into a spraying device, concurrently injecting a liquid desulfurization agent to the spraying device, uniformly spraying the obtained mixture to a combustion chamber after the coal water slurry and the desulfurization agent are mixed in the spraying device; heating primary air from a high pressure fan with an igniter into hot smoke gas when ignition is started; heating the bed material to a temperature of 400-500 DEG C with the hot smoke gas, and blowing up the bed material media and particle groups formed through spraying the coal water slurry with the air distribution plate so as to form a fluidization state; and carrying out rapid water precipitation on the particle groups sprayed on the bed material media under heating of the bed material media at the fluidization state so as to ignite and combust, wherein a combustion temperature achieves 900-1000 DEG C. According to the present invention, the pretreatment is performed on the coal water slurry, the denitration agent is added, a good denitration effect is achieved, a denitration rate is up to 60%, the liquid desulfurization agent is added while the coal water slurry is sprayed, a good desulfurization effect is achieved, and a desulfurization rate is up to 70%.

The invention provides a biological sewage treatment method for enhancing removal of estrogens, which is most suitable for enhancing removal of estrogens in sewage treatment plants with denitrifying and dephosphorizing functions. The method is characterized in that the sewage simultaneously flows into an anaerobic tank, an anoxic tank and an aerobic tank separately in proportion, the anoxic tank is provided with three or more water inlets; the sewage flowing into the anaerobic tank directly undergoes denitrification with the sewage flowing into the anoxic tank and nitrified backflow liquid in the aerobic tank after undergoing anaerobic treatment, then the denitrified product enters into the aerobic tank to directly undergo aeration with the sewage in the aerobic tank, nitrified mixed liquid in the aerobic tank flows back to the anoxic tank to be denitrified, the mixed liquid in the aerobic tank undergoes solid-liquid separation in a secondary sedimentation tank and partial sludge flows back to the anaerobic tank. The method has the characteristics of simple process, good removal effect of estrogens, low operation cost, reasonable carbon source removal approach, stable system operation, high shock load resistance and the like and has strong practicability and operability in the aspect of improving the capability of the sewage treatment process with denitrifying and dephosphorizing functions to remove estrogens.