55results about How to "Achieve short-cut nitrification" patented technology

The invention discloses a system and method for treating municipal sewage through short-cut denitrification-anaerobic ammonia oxidation after short-cut nitrification-anaerobic ammonia oxidation and belongs to the field of sewage biological treatment. The system comprises a raw water tank, an organic matter removal and dephosphorization SBR reactor, a short-cut nitrification SBR reactor, an anaerobic ammonia oxidation granular sludge UASB reactor, a second regulating water tank and a short-cut denitrification-anaerobic ammonia oxidation UASB reactor. All functional floras are subjected to advantageous culture in different reactors according to respective growth characteristics, so that a sludge age contradiction between denitrification and dephosphorization is solved, and stability of the treatment system is enhanced; real-time control is applied to the short-cut nitrification SBR reactor to solve the problem that short-cut nitrification with a low ammonia and nitrogen level is hard to maintain stably; water discharged from the short-cut nitrification reactor and water discharged from the organic matter removal reactor are mixed to solve the problem that continuous flow half short-cut nitrification is hard to maintain; short-cut denitrification-anaerobic ammonia oxidation is used for further treatment of water discharged from the anaerobic ammonia oxidation reactor to solve the problem that nitrate nitrogen is generated during anaerobic ammonia oxidation.

The invention relates to a method for realizing short-cut nitrification of municipal sewage by virtue of a sludge double-reflux AOA process and belongs to the sewage treatment field. A device mainly comprises a sewage raw water tank, a sludge double-reflux AOA reactor and a sedimentation tank, wherein the sludge double-reflux AOA reactor is formed by anaerobic/anoxic/aerobic grids. The device mainly comprises a raw water tank and the sludge double-reflux AOA reactor. According to the method, the sludge double-reflux AOA reactor is sequentially divided into an anaerobic section, an aerobic section and an anoxic section, wherein the anaerobic section is used for synthesizing an internal carbon source PHAs by virtue of COD in sanitary sewage and simultaneously carrying out anaerobic phosphor release; then a mixed liquid enters the aerobic section to generate short-cut nitrification; and finally, the mixed liquid enters the anoxic section to generate internal carbon source denitrification reaction. The ammonia nitrogen load in inflow water is gradually increased, and NOB is subjected to starvation treatment by virtue of long-term anaerobic/anoxic treatment, so that the internal source denitrification reaction of the short-cut nitrification of the municipal sewage is realized, and the deep nitrogen and phosphor removal purposes are achieved. The method is workable, and the problem that the short-cut nitrification of continuous flow is difficultly realized can be solved.

The invention discloses a device and a method for strengthening sludge fermentation by FNA and realizing short-distance nitrogen and phosphorus removal of wastewater, and belongs to the field of wastewater and sludge treatment. The device comprises a raw water tank, an SBR reactor, an intermediate water tank, a UASB reactor, a sludge treatment reactor, and a sludge fermentation tank. According tothe method, FNA is used for inhibiting nitrite oxidizing bacteria to achieve short-cut nitrification and taken as sludge fermentation pretreatment step to promote the combination of hydrolysis and acidification, a part of sludge discharged by a short-range nitrification reactor is returned after being treated by FNA, and the other part of the sludge enters into the sludge fermentation tank. The SBR reactor firstly performs anoxic denitrification to remove excessive nitrite in the upper cycle, then anaerobic phosphorus release, aerobic phosphorus absorption and partial short-range nitrification, effluent enters UASB together with sludge fermentation broth, a part of ammonia nitrogen and nitrite are subjected to autotrophic nitrogen removal through anaerobic ammonia oxidizing bacteria, and residual nitrite and produced nitrate nitrogen are removed by denitrification of organic matters in the sludge fermentation broth. According to the invention, FNA is used for promoting the developmentof an internal carbon sources and realizing nitrogen and phosphorus removal of municipal wastewater, and the amount of the sludge is reduced, and the energy consumption of wastewater treatment is reduced.

The invention relates to an urban sewage treatment device and method for quick realization of partial nitrification based on free nitrous acid inhibition and belongs to the field of sewage treatment. The method comprises the steps that an FNA treatment unit is arranged in parallel in the sludge backflow process of a traditional A2/O technology secondary sedimentation tank, the growth activity of nitrite oxidizing bacteria (NOB) is partially inhibited by using the selective bacterium inhibiting effect of FNA on ammonia oxidizing bacteria (AOB) and NOB under the anoxic condition, sludge then flows back to a main flow A2/O reactor, NOB in active sludge are gradually elutriated under the effect of sludge age control, and thus partial nitrification of the urban sewage is quickly achieved in the main flow A2/O reactor. The method is simple, heating or real-time control is not needed, and a good sedimentation effect is achieved; in addition, phosphate removal and nitrogen removal are carried out simultaneously, the phosphate removal effect is not affected by addition of the FNA treatment unit, the efficient and simultaneous phosphate removal and nitrogen removal effect of the low-carbon source urban sewage is achieved, and the urban sewage treatment device and method for quick realization of partial nitrification based on free nitrous acid inhibition are suitable for upgrading transformation of existing urban sewage plants.

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 a device and method for realizing deep nitrogen and phosphorus removal of urban sewage through sludge double reflux AOA and belongs to the field of sewage treatment. The device mainly comprises a raw sewage tank, a sludge double reflux AOA reactor composed of anaerobic/anoxic/aerobic grids and a sedimentation tank. The device mainly comprises the raw sewage tank and the sludge double reflux AOA reactor. The sludge double reflux AOA reactor is orderly divided into an anaerobic section, an anoxic section and an aerobic section. In the anaerobic section, COD in domestic sewage is used for synthesis of an internal carbon source PFAs and simultaneously, anaerobic phosphorus release is carried out. The mixed solution obtained by the anaerobic section enters the aerobic section and undergoes a shortcut nitrification reaction. The reaction product enters the anoxic section and undergoes an internal carbon source denitrification reaction. The NOB is subjected to starvation treatment by gradually increasing the load of ammonia and nitrogen in inlet water and the long-term anaerobic/anoxic treatment so that urban sewage short-range nitrification internal source denitrification is realized and deep nitrogen and phosphorus removal are realized. The device and method are practicable and can solve the problem that the continuous flow short-range nitrification is difficult.

The invention discloses a device and a method for synergistic inhibition of nitrifying bacteria activity to achieve partial nitrification employing free ammonia and free nitrous acid, and belongs to the field of biological nitrification of continuous flow process wastewater. The device mainly comprises a raw water tank, an intake pump, an intake pipe, an aerobic nitrification pond, a pH determinator, a pH sensor, a blast blower, an aerator tube, an air diffuser, a sludge reflux pipe, a sludge reflux pump, an aerobic nitrification pond drain pipe, a settling pond, a settling pond drain pipe, and a residue sludge discharge pipe. On the basis of the synergistic inhibition mechanism of the free ammonia (FA) and free nitrous acid (FNA) on activity of nitrite-oxidizing bacteria, rapid start and stable maintaining of partial nitrification at normal temperature are achieved by controlling the FA concentration inside the aerobic nitrification pond at 5.9-63.1mg/L, the problem of a bottleneck of partial nitrification of the continuous process is solved, and the device has the characteristics of being high in nitrification efficiency, rapid in reaction rate, and the like, the operation cost is saved, and excellent water is obtained.

The invention provides a device and a method for realizing synchronous short-process nitrification and denitrification dephosphorization to treat urban sewage on the basis of hydroxylamine, and belongs to the field of urban domestic sewage biological treatment. The domestic sewage enters a synchronous short-process nitrification and denitrification dephosphorization reactor through a water inlet pump. In the synchronous short-process nitrification and denitrification dephosphorization reactor, during anaerobic stirring, phosphorus-accumulating bacteria sufficiently utilize carbon source release phosphorus in raw water; during the aerobiotic treatment, the stable short-process nitrification is realized through addition of hydroxylamine; under the anoxic condition, denitrifying phosphorus-accumulating bacteria use nitrite nitrogen as electron acceptors to absorb phosphorus in the water; nitrite nitrogen is reduced into nitrogen gas. Compared with a conventional denitrification dephosphorization process, the process has the advantages that the carbon source is saved; the aeration quantity is reduced.

The invention discloses a method for rapidly starting normal-temperature short-cut nitrification of municipal sewage by benzethonium chloride, and belongs to the technical field of biological sewage treatment; through primary soaking treatment on activated sludge through benzethonium chloride, AOB and NOB are inhibited to a certain extent, but the activity of the AOB can be preferentially recovered, ammonia nitrogen is not converted into nitrate nitrogen any more after ammonia nitrogen is converted into nitrite nitrogen, and short-cut nitrification is successfully realized. The method comprises the steps: inoculating activated sludge subjected to whole-course nitrification into a sequencing batch biochemical reactor, and carrying out benzethonium chloride soaking treatment on the activatedsludge after aeration is finished, wherein the benzethonium chloride concentration is 50-80 mg/L, and the soaking time is 12-24 h. The activated sludge is only soaked once, the reactor returns to normal operation, and when the nitrite accumulation rate (NAR) reaches 90% or above, normal-temperature short-cut nitrification of the municipal sewage is formally started. Short-cut nitrification is realized by a new inhibitor, and the inhibitor can quickly start normal-temperature short-cut nitrification of the municipal sewage.

The invention relates to an apparatus for realizing short-cut nitrification by a membrane bioreactor and method thereof, the apparatus is provided with an anoxic pool, an aerobic pool and an aeration apparatus consisting of an aerator and a blower, a membrane pool and a membrane pool backflow apparatus consisting of a water pump and pipelines, an online dissolved oxygen meter is provided with the aerobic pool, a controllable electric valve and an aeration controller are provided in the aeration apparatus; a backflow controller and a reflux water-locator are provided in the membrane pool backflow apparatus and the membrane pool backflow apparatus is performed a signal connection with an online dissolved oxygen densimeter. The method for realizing the short-cut nitrification comprises: determining a control data through an actual test, setting data; self-operating under an online control. The present invention can be used for wastewater treatment plants and applied to treat nitrogen containing organic industrial wastewater from aquaculture wastewater, monosodium glutamate wastewater, coking wastewater and the like. On the basis of reaching better effect for treating sewage, the apparatus for realizing short-cut nitrification by membrane bioreactor can reduce the aeration energy consumption and add the external carbon sources.

The invention discloses preparation and an application of an ammonia oxidizing bacteria immobilized bioactive filler based on a polyurethane carrier, and belongs to the technical field of water treatment. The bioactive filler comprises two parts: an embedding body and the polyurethane carrier; a porous structure of the polyurethane foam carrier adsorbs a bacteria-containing embedding liquid, wherein the embedding liquid is prepared by mixing an ammonia oxidizing bacteria concentrated solution and a polyvinyl alcohol solution; a whole sheet of polyurethane foam is used as the embedding carrier, the embedding liquid is immersed to the interior of the polyurethane foam by a squeezing way, the embedding body is formed after boric acid secondary cross-linking and is combined with the polyurethane carrier to obtain a filler shape meeting requirements, and thus the ammonia oxidizing bacteria bioactive filler is obtained. The prepared ammonia oxidizing bacteria immobilized bioactive filler not only solves the problems that ammonia oxidizing bacteria are difficult in advantage establishment, easy to lose and the like, but also improves the processing ability of a reactor, shortens the start-up time, and has broad application prospects.

The invention discloses ammonia oxidizing bacteria fixed-type bioactive fillers, and preparation and an application thereof, and belongs to the technical field of water treatment. Bioactive fillers are each composed of a carrier and an embedding body loaded with ammonia oxidizing bacteria, and the fillers are fixed on a prefabricated frame to form the fixed-type bioactive fillers; each carrier is prepared by sewing multiple layers of polyvinyl alcohol non-woven fabrics and one layer of textile fabric; each embedding body is formed by boric acid cross-linking immobilization of an embedding liquid; the embedding liquid is formed by mixing an ammonia oxidizing bacteria concentrated solution and a polyvinyl alcohol solution. Each carrier is soaked in the embedding liquid, through boric acid secondary cross-linking, the non-woven fabrics and the embedding body are firmly bound together, the embedding body penetrates through textile fabric meshes to form an overall riveting fixing structure and does not easily fall off, and the good tensile property of the textile fabric improves the overall stability of the bioactive filler. The prepared ammonia oxidizing bacteria fixed-type bioactive fillers not only solve the problems that the ammonia oxidizing bacteria are difficult in advantage establishment, easy to lose and the like, but also improve the processing ability of a reactor, and have a good application prospect.

The invention discloses a method for rapidly starting and stably maintaining normal-temperature short-cut nitrification of municipal sewage by using phenacetin, and belongs to the technical field of biological sewage treatment. The method comprises the following steps: inoculating the whole-process nitrification activated sludge into a sequencing batch biochemical reactor, and soaking the activated sludge in the reactor with phenacetin with the concentration of 4-20 mg/L for 12-30 hours. The whole-process nitrification activated sludge is soaked in phenacetin, the ammonia oxidation activity of the reactor can be quickly recovered, the nitrite oxidation activity can be continuously inhibited, and when the ammonia nitrogen degradation rate (ARE) reaches 90% or above and the nitrite accumulation rate (NAR) reaches 80% or above, normal-temperature short-cut nitrification of the municipal sewage is formally started.

The invention discloses a treatment technology of livestock and poultry breeding wastewater. The technology comprises steps as follows: sewage is pretreated and then sequentially passes through a primary sedimentation tank, a biological tank and a secondary sedimentation tank for treatment, wherein the biological tank comprises an aerobic zone and an anoxic zone; effluent of the primary sedimentation tank passes through a distribution well and flows into the aerobic zone and the anoxic zone simultaneously, effluent of the aerobic zone enters the anoxic zone for treatment, part of effluent of the anoxic zone flows back to the aerobic zone, the rest of effluent enters the secondary sedimentation tank for precipitation separation, and effluent is discharged from a discharge port; bentonite and grapestone tannin are added to the aerobic zone, and a weight ratio of bentonite to grapestone tannin is (1-3):(0.5-1.8). With the adoption of the technology, ammonia nitrogen in sewage can be rapidly and effectively removed.

The invention discloses a sewage shortcut nitrification system. The sewage shortcut nitrification system comprises a nitrification reactor and an automatic control system, wherein an ammonia nitrogen sensor, a solid concentration sensor and a dissolved oxygen sensor are arranged in the nitrification reactor, the ammonia nitrogen sensor, the solid concentration sensor and the dissolved oxygen sensor are respectively connected to the automatic control system; one side of the nitrification reactor is connected with a water inlet pump, the other side of the nitrification reactor is connected with sedimentation equipment, and an aeration system is arranged at the bottom of the nitrification reactor; and the sedimentation equipment is respectively connected to a sludge reflux pump and a sludge discharging pump, and the sludge reflux pump is connected to the nitrification reactor. The sewage shortcut nitrification system has the advantages that shortcut nitrification can be realized by controlling concentration of ammonia nitrogen and solids in mixed liquor under the condition of relatively high dissolved oxygen concentration, an ammonia nitrogen load can be increased, and greenhouse gas emission can be reduced; the growth rate of ammonia oxidizing bacteria (AOB) is relatively high, relatively high reaction efficiency can be obtained, and an ammonia nitrogen treatment load is increased.

The invention discloses an ammonia oxidizing bacteria immobilized star-shaped bioactive filler based on a reticulate carrier, and preparation and an application thereof, and belongs to the technical field of water treatment. The star-shaped bioactive filler comprises two parts: an embedding body and the carrier; the carrier is a star-shaped reticulate carrier formed by taking polyethylene or polypropylene as a main material, adding a polyvinyl alcohol hydrophilic material and carrying out hot melting or plate hot pressing; with a reticulate structure of the carrier, the embedding body can be allowed to penetrate through meshes to form a riveting fixing structure so as to increase the filler overall stability; an embedding liquid is formed by mixing an ammonia oxidizing bacteria concentrated solution and a polyvinyl alcohol solution; the reticulate carrier is evenly coated with the embedding liquid, and the embedding body is formed after boric acid secondary cross-linking and is combined with the reticulate carrier to obtain the ammonia oxidizing bacteria bioactive filler. The prepared ammonia oxidizing bacteria immobilized star-shaped bioactive filler not only solves the problems that ammonia oxidizing bacteria are difficult in advantage establishment, easy to lose and the like, but also improves the processing ability of a reactor, shortens the start-up time, and has broad application prospects.

The invention discloses preparation and an application of an ammonia oxidizing bacteria sandwich-type multilayer immobilized bioactive filler, and belongs to the technical field of water treatment. The ammonia oxidizing bacteria bioactive filler is composed of two parts: embedding bodies loaded with ammonia oxidizing bacteria and non-woven carriers; the embedding bodies and the non-woven carriers are alternatively arranged; fiber yarns of the non-woven carriers and the embedding bodies are combined into a stable organic whole, an embedding liquid prepared by mixing an ammonia oxidizing bacteria concentrated solution and a polyvinyl alcohol solution evenly coats the non-woven carriers, and multiple layers of carriers are overlaid together, after boric acid secondary cross-linking, the embedding liquid is cured to form the embedding bodies, and the embedding bodies are combined with the non-woven carriers to form a layered filler having a sandwich-like structure, and then the ammonia oxidizing bacteria granular bioactive filler is prepared through cutting the layered filler. The problems that the ammonia oxidizing bacteria are difficult in advantage establishment and are easy to lose are solved, the processing ability of a reactor is improved, and moreover, the sandwich-like layered structure formed by the non-woven fabrics and the embedding bodies improves the stability of the bioactive filler.

The invention discloses a disposable butyronitrile glove production wastewater treatment method. The method comprises the following steps: collecting incoming water through an adjusting tank; removing slag through a coagulation air flotation machine 1; cooling through a cooling tower; enabling the wastewater to pass through a hydrolysis acidification tank and a biological selection tank, and sequentially pass through a first-stage A reaction tank, a first-stage O reaction tank, a second-stage A reaction tank and a second-stage O reaction tank for treatment; separating the sludge from water through an MBR membrane tank; and sterilizing the sewage, carrying out deslagging and discharged, and pressing the sludge into sludge cakes to be transported outwards. The invention relates to a disposable butyronitrile glove production reuse water treatment process, which comprises: filtering incoming water through a multi-medium filter; pumping to a reverse osmosis device, and treating the generated concentrated water through a catalytic ozonation tower and a two-stage A/O tank; and feeding the sewage enters a Fenton reaction tank to be treated. According to the present invention, after the two-stage RO filtration concentration, 70% of the purified water is reused for production, and 30% of the concentrated water is further deeply treated to achieve the emission requirement and then is discharged.