Patents
Literature
Hiro is an intelligent assistant for R&D personnel, combined with Patent DNA, to facilitate innovative research.
Hiro

49results about How to "High accumulation rate" patented technology

Device and method for strengthening multistage A/O process biological nitrogen removal

ActiveCN103896398AEnhancing the SND phenomenonIncrease accumulation rateTreatment with aerobic and anaerobic processesChemistrySewage treatment
The invention provides a device and a method for strengthening multistage A / O process biological nitrogen removal, and belongs to the technical field of sewage treatment. The multistage A / O process is a three-stage A / O process, namely an anoxic zone A-I, an aerobic zone O-I-I, an aerobic zone O-I-II, an anoxic zone A-II, an aerobic zone O-II-I, an aerobic zone O-II-II, an anoxic zone A-III, an aerobic zone O-III-I and an aerobic zone O-III-II in sequence, and the volume ratio of each aerobic zone to each anoxic zone is (0.8-1): 1. Float glass balls are respectively filled in the A-I, O-I-II, A-II, O-II-II, A-III and the O-III-II; three-dimensional sponge fillers are respectively filled in the O-I-I, O-II-I and the O-III-I; the device is used for feeding water into the aerobic zones in three segments in parallel, and nitrification liquid flows back to the anoxic zone A-I from the aerobic zone O-III-II. The device and the method provided by the invention can be used for reducing the sludge, and meanwhile strengthening the SND phenomenon, improving the accumulation rate of nitrous oxide, saving a denitrification carbon source and improving the removal rate of total nitrogen.
Owner:BEIJING UNIV OF TECH

Method and apparatus for realizing heterotrophic and autotrophic coupling advanced nitrogen removal and simultaneous sludge reduction aoa-sbr

A method for realizing heterotrophic and autotrophic coupling advanced nitrogen removal and simultaneous sludge reduction in an anaerobic-aerobic-anoxic sequencing batch reactor (AOA-SBR) is disclosed. Municipal sewage and sludge fermentation mixture is allowed to simultaneously enter into the AOA-SBR; in the anaerobic stage, the organic matter in the sewage and sludge fermentation mixture is converted into polyhydroxyalkanoates (PHA) and stored in the body; in the aerobic stage, the dissolved oxygen (DO) at 0.5˜1 mg / L is maintained by a real-time control, the aeration time is set for 1˜3 h, and when the mass concentration ratio of NO2−—N to NH4+—N is in a range from 1.5 to 2.0, the aeration is stopped, that is, ammonia-nitrogen is partially converted into nitrite-nitrogen through short-cut nitrification; in the anoxic stage, the remaining ammonia-nitrogen and nitrite-nitrogen undergo anaerobic ammonia oxidation (anammox), and meanwhile the remaining nitrite-nitrogen and nitrate-nitrogen generated by anammox is reduced by denitrifying bacteria to nitrogen to achieve advanced nitrogen removal. A related apparatus is also provided, which simultaneously realizes advanced nitrogen removal of sewage and reduction of sludge.
Owner:BEIJING UNIV OF TECH

Device and method for treating municipal wastewater with low C/N ratio through silicon source adsorption/nitrification/partial denitrification/anaerobic ammonia oxidation coupling process

The invention provide a device and method for treating municipal wastewater with a low C / N ratio through a silicon source adsorption / nitrification / partial denitrification / anaerobic ammonia oxidation coupling process, and belongs to the field of wastewater treatment. According to the method, municipal domestic wastewater enters an adsorption tank at first, and most organic substances in the wastewater are adsorbed by activated sludge through mixed aeration; after precipitation, a supernatant enters a nitrification / partial denitrification / anaerobic ammonia oxidation reactor, and part of the sludge enters a fermentation tank; low-oxygen aeration is carried out after the supernatant enters a nitrification / partial denitrification / anaerobic ammonia oxidation reactor, and then short-cut nitrification and anaerobic ammonia oxidation are carried out synchronously; short-cut nitrification is not strictly controlled, so that part of ammonia nitrogen is subjected to complete nitrification; after the reaction is finished, the content of nitrate nitrogen in the nitrification / partial denitrification / anaerobic ammonia oxidation reactor is very high, and meanwhile the fermented supernatant is pumped for anoxic stirring; by use of a silicon source in a fermentation solution, nitrate nitrogen is reduced to nitrite nitrogen for an anaerobic ammonia oxidation reaction with ammonia nitrogen in the fermentation solution, so that total nitrogen in the municipal domestic wastewater can be efficiently removed.
Owner:BEIJING UNIV OF TECH

Device and method for enhancing advanced nitrogen and phosphorus removal from municipal wastewater by using excess sludge anaerobic fermentation mixture through two stages of SBRs (sequencing batch reactors)

The invention discloses a device and a method for enhancing advanced nitrogen and phosphorus removal from municipal wastewater by using an excess sludge anaerobic fermentation mixture through two stages of SBRs (sequencing batch reactors), and belongs to the field of biochemical treatment of wastewater. The device comprises an excess sludge fermentation tank, a sludge storage tank, a raw water tank, an intermediate water tank, the two SBRs, an air compressor and a peristaltic pump. The method comprises the steps that a domestic wastewater and excess sludge fermentation mixture enter the first SBR firstly for anaerobic phosphorus release, shortcut nitrification and anoxic denitrifying phosphorus accumulation; drained water from the first SBR enters the intermediate water tank and then enters the second SBR, NH4<+>-N and NO2<->-N, which are not nitrified and produced through fermentation of hydrolytic acidification organisms, in the drained water are continuously subjected to further nitrification, meanwhile, phosphorus-accumulating organisms accumulate phosphorus sufficiently, and finally, advanced nitrogen and phosphorus removal from the domestic wastewater is realized. The device and the method are applicable to enhanced nitrogen and phosphorus removal from the municipal wastewater with low C/N and C/P, carbon sources are saved, the nitrogen and phosphorus removal efficiency is increased, and sludge reduction treatment is realized.
Owner:BEIJING UNIV OF TECH

Device and method for treating low-C/N municipal sewage by pre-positioned short-range denitrification-anaerobic ammonia oxidation

The invention provides a device and a method for treating low-C / N municipal sewage by pre-positioned short-range denitrification-anaerobic ammonia oxidation and belongs to the technical field of biological sewage treatment. The device provided by the invention comprises a raw water tank, a pre-positioned short-range denitrification reactor, an intermediate water tank and an anaerobic ammonia oxidation reactor. The method comprises the following steps: firstly, enabling the municipal sewage to enter the pre-positioned short-range denitrification reactor and carrying out short-range denitrification by utilizing organic matters in domestic sewage and nitric nitrogen which is remained on the last period; secondly, enabling the sewage into an anaerobic ammonia oxidation reactor and carrying out autotrophic nitrogen removal; meanwhile, draining water from the pre-positioned short-range denitrification reactor and carrying out aerobic aeration to generate the nitric nitrogen. According to the device and the method, provided by the invention, a carbon source in domestic sewage can be sufficiently utilized for carrying out the short-range denitrification and the ratio of an anaerobic ammonia oxidation substrate is controlled through a water draining ratio, so that energy sources are saved; the device and the method are easy to control and high in stability, and an effective way is provided for application of a mainstream anaerobic ammonia oxidation technology and deep denitrification of the low-C / N municipal sewage.
Owner:BEIJING UNIV OF TECH

Device and method for deep denitrification of domestic sewage through combination of intermittent-aeration-mode simultaneous nitrification and denitrification with short-range denitrification-anaerobic ammonium oxidation

The invention provides a device and method for deep denitrification of domestic sewage through the combination of intermittent-aeration-mode simultaneous nitrification and denitrification with short-range denitrification anaerobic ammonium oxidation, belonging to the field of biological treatment of sewage. The device comprises an excess sludge fermentation cylinder, a sludge-water separator, a raw water tank, an intermediate water tank, two sequencing batch SBR reactors, an air compressor, a peristaltic pump, and the like. The method comprises the following steps: add domestic sewage into thefirst sequencing batch reactor, and removing all the ammonia nitrogen and the most of total nitrogen through simultaneous nitrification and denitrification in an intermittent aeration mode; and allowing discharge water of the previous step and sludge fermentation broth obtained after sludge-water separation to enter the second sequencing batch reactor, and removing left nitrite and nitrate nitrogen through coupled short-range denitrification-anaerobic ammonium oxidation so as to eventually realize deep denitrification of domestic sewage. The device and method of the invention are applicable to low-C / N urban domestic sewage, and can reduce aeration amount and energy consumption, homogenize the concentrations of organic matters in the domestic sewage, slow down the consumption speed of organic matters, improve nitrogen removal efficiency and realize recycling of excess sludge.
Owner:BEIJING UNIV OF TECH

Synchronous nitrosation-Anammox device for low-temperature low-ammonia-nitrogen sewage based on magnetic induction heat effect and application thereof

The invention relates to a synchronous nitrosation-Anammox device for low-temperature low-ammonia-nitrogen sewage based on a magnetic induction heat effect, which comprises a sewage treatment container, a composite filler in the sewage treatment container and a magnetic field generation device outside the sewage treatment container. A metal conductor is arranged in the composite filler, a protective layer is arranged on the middle layer, a porous adsorption carrier layer is arranged on the outer layer, and anaerobic ammonia oxidizing bacteria and nitrite bacteria grow in the porous adsorption carrier layer and on the surface of the porous adsorption carrier layer. The device adopts a one-stage Canon process, local high temperature is generated through an external alternating magnetic field and the magnetic induction heat effect of the metal conductor in the composite filler, meanwhile, the outer adsorption carrier selectively adsorbs ammonia nitrogen to create a local high-nitrogen-carbon-ratio environment, anaerobic ammonia oxidizing bacteria and nitrite bacteria are efficiently screened, and competitive advantages of the anaerobic ammonia oxidizing bacteria and the nitrite bacteria are kept. The biological activity is efficiently improved with low consumption, the denitrification capacity of the nitrosation-Anammox process on low-temperature and low-ammonia-nitrogen urban sewage is remarkably improved, and the capital construction and operation cost for sewage treatment is greatly reduced.
Owner:南京富磁科技有限公司

Low-temperature low-ammonia-nitrogen sewage denitrification device based on magnetocaloric effect coupling carrier

The invention relates to a low-temperature low-ammonia-nitrogen sewage denitrification device based on a magnetocaloric effect coupling carrier. The low-temperature low-ammonia-nitrogen sewage denitrification device comprises a sewage treatment container, the magnetocaloric carrier in the sewage treatment container and a magnetic field generation device outside the sewage treatment container, wherein the magnetocaloric carrier is nano Fe3O4-loaded zeolite, and anaerobic ammonia oxidizing bacteria and nitrite bacteria grow in the magnetocaloric carrier and on the surface of the magnetocaloric carrier. According to the device, a one-stage Canon process is adopted, precise local controllable temperature rise can be realized through a magnetocaloric effect generated by an external medium-high frequency alternating magnetic field and zeolite-loaded nano Fe3O4, zeolite selectively adsorbs ammonia nitrogen to create a local high-nitrogen-carbon-ratio environment, and the device has targeted advantages for solving the problem of low-temperature low-ammonia-nitrogen sewage denitrification treatment, anaerobic ammonia oxidizing bacteria and nitrite bacteria are efficiently screened, the competitive advantages of the bacteria are kept, the microbial activity is efficiently improved with low consumption, and the capital construction and operation cost for sewage treatment is greatly reduced.
Owner:南京富磁科技有限公司

Method of stacking horizontal rib on unequal-height section through laser cladding operation

The invention relates to a method of stacking a horizontal rib on an unequal-height section through laser cladding operation. The method comprises the following steps that the unequal-height section and a laser cladding device are provided, the stacking position is determined on the unequal-height section, and the length of the rib on the unequal-height section is determined according to the stacking position; and the lowest portion of the stacking position serves as the head segment of the rib, the highest portion of the stacking position serves as the tail segment of the rib, the number of segments of the rib is determined according to the length and the height of each segment of the rib in the vertical direction, the cladding speed of each segment of the rib is determined according to the relationship of the cladding height of each segment of the rib and the scanning speed under the condition of a certain parameters, and the laser cladding operation is conducted, so that the horizontal rib is obtained. According to the method, a segmentation speed changing method is adopted to conduct segmentation on the rib on the unequal-height section, and the rib obtained through the cladding operation can be of a horizontal structure by use of the influence of the change of the scanning speed on the height of the cladding layer.
Owner:SUZHOU UNIV

Method for rapidly starting short-cut nitrification of domestic sewage

A method for quickly starting short-cut nitrification of domestic sewage comprises the following steps: (1) inoculating nitrification sludge into a short-cut nitrification system of the domestic sewage to enable the sludge concentration to be 2500-3500 mg / L; (2) recovering the metabolic activity of the inoculated sludge in a domestic sewage short-cut nitrification system under a low-temperature condition to complete activity recovery; (3) mixing the ferric oxide nano-particles or ferric trichloride with the domestic sewage under a low-temperature condition to enter a domestic sewage short-cut nitrification system, and starting and operating the system; (4) carrying out sequencing batch reaction, carrying out aeration after water feeding is finished, and respectively adding the ferric oxide nanoparticles or ferric trichloride according to a certain adding frequency; and (5) monitoring the nitrite accumulation rate of the effluent, and when the nitrite accumulation rate reaches 75% or above and stable operation is carried out for 7 days or above, considering that the short-cut nitrification system is successfully started. The sludge settling performance can be remarkably improved, the process control condition is simple, the operation cost is low, the operability is high, and the operation effect is stable.
Owner:QINGDAO TECHNOLOGICAL UNIVERSITY

Apparatus and method for the treatment of low c/n urban sewage by pre-short-range denitrification-anammox

The invention provides a device and a method for treating low-C / N municipal sewage by pre-positioned short-range denitrification-anaerobic ammonia oxidation and belongs to the technical field of biological sewage treatment. The device provided by the invention comprises a raw water tank, a pre-positioned short-range denitrification reactor, an intermediate water tank and an anaerobic ammonia oxidation reactor. The method comprises the following steps: firstly, enabling the municipal sewage to enter the pre-positioned short-range denitrification reactor and carrying out short-range denitrification by utilizing organic matters in domestic sewage and nitric nitrogen which is remained on the last period; secondly, enabling the sewage into an anaerobic ammonia oxidation reactor and carrying out autotrophic nitrogen removal; meanwhile, draining water from the pre-positioned short-range denitrification reactor and carrying out aerobic aeration to generate the nitric nitrogen. According to the device and the method, provided by the invention, a carbon source in domestic sewage can be sufficiently utilized for carrying out the short-range denitrification and the ratio of an anaerobic ammonia oxidation substrate is controlled through a water draining ratio, so that energy sources are saved; the device and the method are easy to control and high in stability, and an effective way is provided for application of a mainstream anaerobic ammonia oxidation technology and deep denitrification of the low-C / N municipal sewage.
Owner:BEIJING UNIV OF TECH

Device and method for intermittent aeration and simultaneous nitrification and denitrification combined with short-range denitrification and anammox to achieve deep denitrification of domestic sewage

ActiveCN109019862BContinuous and stable synchronous nitrification and denitrification reactionImprove total nitrogen removal rateWater contaminantsTreatment with aerobic and anaerobic processesSequencing batch reactorPeristaltic pump
The invention relates to a device and a method for realizing deep denitrification of domestic sewage by synchronous nitrification and denitrification combined with short-range denitrification and anammox with intermittent aeration, and belongs to the field of sewage biological treatment. The device includes excess sludge fermentation tank, mud-water separator, raw water tank, intermediate water tank, two sequencing batch SBR reactors, air compressor, peristaltic pump, etc. The method is to add domestic sewage into the first sequence batch reactor, and remove all ammonia nitrogen and most of the total nitrogen through synchronous nitrification and denitrification under the intermittent aeration mode; In the second-sequence batch reactor, the remaining nitrite and nitrate are removed through short-range denitrification coupled with anaerobic ammonium oxidation, and finally realize the deep denitrification of domestic sewage. The invention is suitable for low C / N urban domestic sewage, can reduce aeration, reduce energy consumption, homogenize the concentration of organic matter in domestic sewage, slow down the consumption speed of organic matter, improve the efficiency of denitrification, and realize resource utilization of excess sludge at the same time.
Owner:BEIJING UNIV OF TECH

High-efficiency denitrification device and method capable of releasing self-reinforced solid carbon source

The invention discloses a high-efficiency denitrification device and method capable of self-strengthening release of a solid carbon source. The device comprises a water distribution and sludge discharge device, a reaction device and a three-phase separation device which are sequentially communicated from bottom to top, an anaerobic ammonia oxidation zone, an inner three-phase separation zone, an inner water distribution zone and a short-range denitrification zone are sequentially arranged in the reaction device from bottom to top. Ammonia nitrogen and nitrite nitrogen in wastewater are removed through the anaerobic ammonia oxidation zone, then the wastewater is separated in the inner three-phase separation zone, gas is accumulated through the gas collection device and then is subjected to pulse gas release in the short-cut denitrification zone, and liquid enters the short-cut denitrification zone through the inner water distribution zone; the short-cut denitrification zone is provided with a solid carbon source, and power generated by pulse gas release can promote flow state disturbance and release of the solid carbon source; nitrate nitrogen of the wastewater is converted into nitrite nitrogen through the short-cut denitrification region, and the nitrite nitrogen flows back to the anaerobic ammonia oxidation region. According to the invention, all reaction characteristics are fully utilized, the release efficiency of the solid carbon source is enhanced by adopting self-produced gas disturbance, the function cooperation of short-cut denitrification and anaerobic ammonia oxidation processes is improved, and efficient and economic biological denitrification is realized.
Owner:ZHEJIANG UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products