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1685 results about "Nitrate nitrogen" patented technology
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Nitrate Nitrogen. The concentration of nitrates is commonly expressed as N03-. ... The term "nitrate nitrogen" is used to refer to the nitrogen present which is combined in the nitrate ion. This nomenclature is used to differentiate nitrate nitrogen from nitrogen in the form of ammonia (ammonia nitrogen), from nitrogen in the form of nitrite (nitrite nitrogen), etc.
Pseudomonas stutzeri YZN-001 for removing ammoniacal nitrogen, nitrate nitrogen and nitrous nitrogen in water body and application
The invention belongs to the technical filed of agricultural microorganisms, particularly relating to separate and screen Pseudomonas stutzeri YZN-001 for degrading ammoniacal nitrogen, nitrate nitrogen and nitrous nitrogen in water body and application. The screened Pseudomonas stutzeri YZN-001 of the invention is preserved in China Center for Type Culture Collection (CCTCC), with the preservation number being CCTCC NO:M 209107. The strain can effectively degrade ammoniacal nitrogen, nitrate nitrogen and nitrous nitrogen in water body within the range of 20-37 DEG C, has no toxicity to chub, has good degradation function on ammoniacal nitrogen in water body at normal temperature, the microorganism of the invention is inoculated for 72 hours, the degrading ratios to ammoniacal nitrogen in domestic sewage and aquaculture wastewater are respectively up to 83.10% and 61.38%.
Owner:HUAZHONG AGRI UNIV
Aerobic denitrifying Paracoccus denitrificans and application thereof
ActiveCN102465104ABiologically active and stableImprove denitrification effectBacteriaTreatment with aerobic and anaerobic processesSynechococcusPyrococcus
The invention relates to aerobic denitrifying paracoccus denitrificans and application thereof. A bacterial strain provided in the invention is paracoccus denitrificans DN-3CGMCC No. 3658; the Paracoccus denitrificans can carry out aerobic denitrification by using nitrate nitrogen under both aerobic and oxygen-limited conditions and can also carry out heterotrophic nitrification-aerobic denitrification by using ammonia-N, and a total nitrogen removal rate on above mentioned occasions is greater than 90%. The paracoccus denitrificans provided in the invention has stable hereditary features, isapplicable to treatment of a variety of nitrogen-containing waste water and produces a good nitrogen removal effect.
Owner:CHINA PETROLEUM & CHEM CORP +1
Wastewater treatment process
InactiveUS6113788AImprove efficiencyFacilitated releaseTreatment using aerobic processesSeparation devicesSludgePhosphate
A wastewater treatment process having improved solids separation characteristics and reduced biochemical oxygen demand (BOD) in the purified wastewater comprising the steps of: passing wastewater through a main aerobic biological oxidation zone and therein oxidizing a portion of the BOD a portion of the ammonia nitrogen content (NH3-N); passing the effluent from said aerobic biological oxidation zone to an aerobic / mixing zone and therein mixing said effluent with effluent from the anoxic / anaerobic zone; passing the effluent from said aerobic / mixing zone to a settling zone and therein separating purified wastewater having reduced BOD and suspended solids, and sludge containing suspended solids; passing a portion of the sludge formed in the settling zone and volatile acids to an anoxic / anaerobic zone and therein increasing the extracellular polymer content of said sludge, the release of phosphorus into solution and the reduction of nitrate nitrogen to molecular nitrogen gas; and recycling an effective amount of the effluent from said anoxic / anaerobic zone to said aerobic / mixing zone. In an alternative embodiment, a volatile acid is added to a zone to which no additional oxygen has been added that is in the flow path from the main aerobic biological oxidation zone or, alternatively, it may be added to the anoxic / anaerobic zone and the thus-treated effluent is passed to the aerobic / mixing zone wherein phosphate is removed from the effluent.
Owner:POLYTECHNIC INST OF NEW YORK
Carbon-based fertilizer potentiating agent and application thereof
InactiveCN102675001ASimple production processRaw materials are easy to getClimate change adaptationFertilising methodsNitrification inhibitorsPollution
Owner:SHENYANG AGRI UNIV
Wastewater treatment process
InactiveUS20010045390A1Improve efficiencyTreatment using aerobic processesTreatment with aerobic and anaerobic processesActivated sludgeVolatile fatty acids
Owner:KIM SUNGTAI +2
Method for removing nitrate nitrogen from aquaculture water
InactiveCN101200332AImprove effluent qualityEasy working condition controlTreatment with anaerobic digestion processesDevice formBiodegradable polymer
The invention relates to a method of removing nitrate in aquaculture water, relating to treat aquaculture water. The invention comprises a sulfur autotrophic denitrification and biodegradation polymer carbon source heterotrophic denitrification device, the invention is characterized in that: the sulfur autotrophic denitrification section and the biodegradation polymer carbon source heterotrophic section are series-connected from up to down according to the proportion of 1:1 to form a denitrifying device; after the integrated denitrifying device forms film, the aquaculture water enters from the water inlet of the lower part of the integrated denitrifying device, and flows through the filling layer of the sulfur autotrophic denitrification section from up to down to remove partial nitrate, the remained nitrate in the aquaculture water and the sulfate anion generated in the process of the sulfur autotrophic denitrification section enter the filling layer of the biodegradation polymer carbon source heterotrophic section, so as to remove the remained nitrate in the aquaculture water and also generate gaseous nitrogen, the reducing bacteria of the sulfate reduces the sulfate anion to hydrogen sulfur; the treated aquaculture water flows out from the water outlet of the lower part of the integrated denitrifying device; the gaseous nitrogen and hydrogen sulfur are exhausted from exhaust opening.
Owner:SHANGHAI FISHERIES UNIV
Siderite-based nitrogen and phosphorus removal material and application method thereof
ActiveCN103801254AWith strengthHigh porosityOther chemical processesTreatment with aerobic and anaerobic processesPorosityPhosphate
The invention discloses a preparation method and applications of a siderite-based nitrogen and phosphorus removal material. The preparation method is implemented through steps of crushing siderite ores, enabling the obtained ores to pass through a 40-mesh sieve, and adding a foaming agent into siderite ore powder in an appropriate proportion of the siderite ore powder, a binder and a pore-foaming agent or in an appropriate proportion of the siderite ore powder and a binder so as to obtain a porous granular material taking the siderite ore powder as a main body; and the porous granular material has the characteristics of high particle strength, high porosity, large specific surface area, large microbial load, and the like. The material is a microbial carrier, an anaerobic microorganism electron donor and a phosphorus removal adsorbent. The material is fed in a fixed bed to treat wastewater by way of filtering, and vaccinates nitrate-depended iron-oxidizing-bacteria-based anaerobic strain liquid, and under anaerobic conditions, microorganisms reduce nitrates into nitrogen by taking ferrous irons in siderite as electron donors, and the adsorption effect on phosphorus is enhanced. The material is mainly used for synchronously removing nitrate nitrogen and phosphates in wastewater.
Owner:HEFEI UNIV OF TECH
Natural pyrrhotite biological filter and method for synchronously removing nitrate nitrogen and phosphorus out of water by using natural pyrrhotite biological filter
ActiveCN103626293ASync removalEasy to handleWater treatment parameter controlWater treatment compoundsElectron donorBiological filter
The invention discloses a natural pyrrhotite biological filter and a method for synchronously removing nitrate nitrogen and phosphorus out of water by using the natural pyrrhotite biological filter, which belongs to the field of advanced wastewater treatment. The method comprises the following steps: (1) preparing and constructing biological filter fillers; (2) starting the biological filter; and (3) operating the biological filter. Pyrrhotite is used as an electron donor of sulfur autotrophic denitrification bacteria to reduce nitrate in the water to nitrogen so as to remove nitrate nitrogen out of the water; and the pyrrhotite and an oxidative product of the pyrrhotite remove phosphorus in such manners as adsorption and chemical precipitation so as to synchronously remove nitrate nitrogen and phosphorus out of the water. The biological filter disclosed by the invention is simple to construct, convenient to start, stable to operate, high in nitrogen and phosphorus removal efficiency and free of auxiliary materials, and the biological filter is applied to advanced wastewater treatment.
Owner:NANJING UNIV
Integrated pre-denitrification and denitrogenation biological filter sewerage treatment process
InactiveCN101525207AImprove denitrification effectHigh processing loadTreatment with aerobic and anaerobic processesMultistage water/sewage treatmentDenitrifying bacteriaBiological filter
The invention discloses an integrated pre-denitrification and denitrogenation biological filter sewerage treatment process. The integrated process is characterized in that: the process is realized by combining an anoxic denitrification biological filter and an aerobic nitrification biological filter in tandem, first, sewage with organic substances and ammonia nitrogen is mixed with part of effluent water of the aerobic nitrification biological filter which flows back to a water inlet end, then the sewage and the effluent water pass the anoxic denitrification biological filter together, and the organic substances in the sewage are taken as a carbon source by denitrifying bacteria adhesively growing on bio-ceramsite in the anoxic denitrification biological filter to reduce nitrate nitrogen from the return water of the aerobic nitrification biological filter into nitrogen gas, thus realizing denitrification function; and the effluent water of the anoxic denitrification biological filter flows to the aerobic nitrification biological filter, and a filter material in the aerobic nitrification biological filter is adhered with special growing aerobic decarbonization microbes and the growing denitrifying bacteria which further degrade the organic substances and the ammonia nitrogen from the anoxic denitrification biological filter, thus causing content indicators of the organic substances, the ammonia nitrogen, total nitrogen and the like in the effluent water of the aerobic nitrification biological filter to meet the discharge requirement.
Owner:郑俊
Nitrogen-containing sewage treatment process and device for synchronously producing electricity and recovering nitrogen element
InactiveCN102372398ARealize resource processingSimple structureFinal product manufactureBiochemical fuel cellsAnaerobic decompositionHigh concentration
The invention belongs to the technical field of water treatment, and in particular relates to a nitrogen-containing sewage treatment process and device for synchronously producing electricity and recovering a nitrogen element. The device comprises a bioelectrochemical system and a membrane distillation system, wherein the bioelectrochemical system comprises six parts, namely a positive electrode chamber, a positive membrane, a recovery chamber, a negative membrane, a negative electrode chamber, an outer circuit. The process comprises the following steps: entering nitrogen-containing sewage into the positive electrode chamber, carrying out microorganism anaerobic decomposition on pollutants and transferring electrons to a positive electrode, and further transferring the electrons to a negative electrode through the outer circuit so as to achieve electricity production; entering the nitrogen-containing sewage into the negative chamber for aerobic treatment, thus converting ammonia nitrogen into nitrate nitrogen; respectively entering ammonium radical in the positive electrode chamber and nitrate radical in the negative electrode chamber into the recovery chamber through the positivemembrane and the negative membrane under the driving of potential difference; and treating water in the recovery chamber with the membrane distillation system, and refluxing percolate to the recoverychamber, wherein a concentrated liquid is a solution containing high-concentration ammonium nitrate and the like, thereby achieving the recovery of the nitrogen element. The process provided by the invention is simple and has high efficiency and good economic benefits; and the treatment device is simple in structure, and is convenient for practical application.
Owner:INST OF URBAN ENVIRONMENT CHINESE ACAD OF SCI
Device and method for nitrogen and phosphorus removal treatment by denitrification on high-ammonia nitrogen anaerobic ammonia oxidation effluent and domestic sewage
ActiveCN103539317AReduce outputLess oxygen consumptionMultistage water/sewage treatmentNitrifying bacteriaSedimentation
The invention discloses a device and method for nitrogen and phosphorus removal treatment by denitrification on high-ammonia nitrogen anaerobic ammonia oxidation effluent and domestic sewage, belonging to the field of biological sewage treatment. The device comprises a high-ammonia nitrogen inflow water tank, an integrated partial nitrification and anaerobic ammonia oxidation reactor, a sedimentation tank, a domestic sewage inflow water tank, a denitrification nitrogen and phosphorus removal reactor and an effluent water tank sequentially connected in series. The method comprises the following steps: in the integrated reactor, effectively removing nitrogen of the high-ammonia nitrogen wastewater through the effect of partial nitrification and anaerobic ammonia oxidation; in the denitrification nitrogen and phosphorus removal reactor, performing anaerobic phosphorus release by phosphorus-accumulating bacteria by use of an organic carbon source in the domestic sewage, and performing hypoxia denitrification phosphorus removal by use of nitrate nitrogen in the anaerobic ammonia oxidation effluent; and finally, further absorbing phosphorus at the aerobic zone in accompany with the nitrification effect generated by the nitrification bacteria. According to the method, the nitrogen removal by anaerobic ammonia oxidation and phosphorus removal by denitrification are coupled into a biological nitrogen and phosphorus removal system for sewage, the nitrate nitrogen generated in the anaerobic ammonia oxidation process is effectively utilized, and the oxygen consumption and energy consumption are greatly reduced.
Owner:BEIJING UNIV OF TECH
Neural network based sewage disposal process optimal control method
ActiveCN103809557AResolve imprecisionTotal factory controlProgramme total factory controlOptimal controlNitrate nitrogen
The invention provides a neural network based sewage disposal process optimal control method and aims to solve the problem of excessive energy consumption during a sewage disposal process. The sewage disposal process is a highly non-linear, time-varying and complicated process, and on the premise that effluent qualities meet the standard, reduction of operation energy consumption is much challenging. The method mainly includes two neural networks, wherein one neural network is used for establishing a sewage disposal process prediction model so as to achieve prediction of performance indexes, and the other neural network is used for real-timely optimizing control variable set values according to system states and predicted performance indexes. Finally, optimal control of dissolved oxygen concentration and nitrate nitrogen concentration is achieved, so that requirements of effluent qualities can met, and meanwhile, operation costs of the sewage disposal process can be effectively reduced.
Owner:BEIJING UNIV OF TECH
Sewage processing process dynamic multi-target optimization control method
ActiveCN105404151AHigh energy consumptionImprove water quality indicatorsAdaptive controlProcess dynamicsNerve network
The invention discloses a sewage processing process dynamic multi-target optimization control method, belongs to the field of water research and also belongs to the field of intelligent control, for simultaneously optimizing energy consumption and water quality indexes under the condition that the water quality reaches the standard. First of all, a sewage processing process multi-target optimization model is constructed through a nerve network online modeling method for solving the problem of lack of accurate mathematic description between an optimization variable and a performance index; secondly, based on the established optimization model, a Pareto optimal solution of the problem is obtained through a multi-target optimization algorithm, and according to decision information, one satisfactory optimization solution is determined from a Pareto solution set, i.e., optimization set values of a dissolved oxygen concentration and a nitrate nitrogen concentration; and finally, a bottom controller realizes a tracking task of the optimization set value. The method provided by the invention can effectively reduce the energy consumption and the operation cost of a sewage processing process under the condition that the water quality reaches the standard.
Owner:BEIJING UNIV OF TECH
Method for producing high-water solubility nitrophosphate fertilizer by phosphorite nitrolysis and calcium nitrate freezing
InactiveCN102351590APromote absorptionImprove qualityCalcium/strontium/barium carbonatesFertilizer mixturesSolubilityChemical industry
The invention discloses a method for producing high-water solubility nitrophosphate fertilizer by phosphorite nitrolysis and calcium nitrate freezing. The high-water solubility nitrophosphate fertilizer is prepared from the processes of phosphorite nitrolysis, fluorine removal, calcium nitrate freezing separation, further removal of calcium in ammonium sulfate, ammonia liquor neutralization and deposition removal of impurities, and evaporation concentration and crystallization. Specially, the method for producing high-water solubility nitrophosphate fertilizer by phosphorite nitrolysis and calcium nitrate freezing comprises the following steps of 1, acidolysis, 2, fluorine removal, 3, calcium nitrate freezing crystallization, 4, double decomposition removal of calcium in ammonium sulfate,5, neutralization and deposition removal of impurities, 6, evaporation concentration and crystallization, and 7, phosphogypsum transformation. The high-water solubility nitrophosphate fertilizer prepared by the method has a dissolution rate great than or equal to 99.9% in water, wherein nitrate nitrogen is easy for be absorbed by drops, satisfies requirements of a few commercial crops, has a highutilization rate, and improves a crop yield by 8 to 25% and crop quality. The method reduces waste discharge, is environmentally friendly, can be utilized for structure adjustment and product upgradeand update of the traditional phosphorus chemical industry, and has good economic and environmental benefits.
Owner:GUIZHOU RES INST OF CHEM IND
Application of salt-tolerant nitrogen and phosphorus removing bacillus alitudinis to wastewater treatment
ActiveCN102703350AAchieve removalRealize synchronous removalBacteriaWater contaminantsNitrate nitrogenSewage
The invention relates to a high salt-tolerant bacillus alitudinis with functions of heterotrophic nitrification-aerobic denitrification and phosphorous removal and application thereof to wastewater treatment. The bacillus alitudinis has strong high salt environment tolerance, grows well under a high-salt condition, and can metabolize by taking organic carbon as one and only carbon source and ammonia nitrogen as one and only nitrogen source; through the heterotrophic nitrification-aerobic denitrification, the ammonia nitrogen is directly converted into a gaseous product so as to achieve a denitrifying purpose; the bacillus alitudinis can also take nitrate nitrogen as one and only nitrogen source, the nitrate nitrogen is converted into a gaseous product through the aerobic denitrification; and under aerobic conditions inorganic phosphorus can be taken into a body and converted into a component of the body so as to realize a purpose of removing phosphorus in sewage. The bacillus alitudinis is applied to high-salt wastewater treatment, can achieve synchronization removal of nitrogen and phosphorus under a single aerobic condition, and provides a new way for solving a problem of biological removal of the nitrogen and phosphorus under the high-salt condition.
Owner:北京大学科技开发有限公司
Magnetic microsphere resin for removing nitrate nitrogen selectively, and preparation method thereof
ActiveCN102430433AHigh base exchange capacityAccelerated settlementWater/sewage treatment by ion-exchangeAnion exchangersOil phaseStructural formula
The invention discloses magnetic microsphere resin for removing nitrate nitrogen selectively, and a preparation method thereof, and belongs to the field of ion exchange resin. The resin consists of a resin skeleton, and magnetic granules wrapped in the resin skeleton; and the resin skeleton has a basic structural formula shown in the specification, wherein B is a quaternary ammonium salt group for adsorbing the nitrate nitrogen selectively, the saturation magnetization intensity of the quaternary ammonium salt group is between 5 and 30 emu / g, the exchange capacity of strong base is between 3.0 and 4.5 mmol / g, the exchange capacity of weak base is between 0.5 and 1.5 mmol / g, and the average grain diameter of the resin is between 50 and 500 micrometers. The resin is synthesized by a suspension polymerization method; acrylate monomers are mixed with a pore-forming agent and an initiator to form an oil phase; after being mixed with the magnetic granules uniformly, the mixture is subjectedto suspension polymerization with an aqueous phase mixed with a dispersing agent to form the magnetic polymer granules, and the magnetic polymer granules are subjected to aminolysis and alkylation toform the resin serving as a finished product. The resin can adsorb negative ions such as nitrates, nitrites and the like in a water body selectively, so the magnetic microsphere resin has a bright application prospect in fields of drinking water treatment, groundwater remediation and the advanced treatment of urban domestic sewage.
Owner:NANJING UNIV +1
System and method for treating municipal sewage through short-cut denitrification-anaerobic ammonia oxidation after short-cut nitrification-anaerobic ammonia oxidation
ActiveCN105461178AReduce oxygen consumptionAvoid influenceWater treatment parameter controlMultistage water/sewage treatmentContinuous flowOxidative treatment
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.
Owner:BEIJING UNIV OF TECH
Sewage double-biomembrane deep treatment technology
InactiveCN101591065AFulfil requirementsGood denitrification and phosphorus removalTreatment with aerobic and anaerobic processesSludgeBiological filter
The invention relates to a sewage double-biomembrane deep treatment technology comprising the steps: sewage enters an anaerobic tank, an anoxic tank and an oxygen maintaining tank after being pretreated by a grid and settled sand, and mud releases phosphorus in the anaerobic tank; the sewage is denitrified in a denitrification mode in the anoxic tank so as to remove most of organic matters; cilium biological fillers are arranged in the oxygen maintaining tank, biomembranes are attached to the cilium, absorb the phosphorus in excess and degrade the partial organic matters; the sewage enters a secondary sedimentation tank to carry out sedimentation treatment through the oxygen maintaining tank and then enters an aeration biological filter tank; granule biological fillers are arranged in the aeration biological filter tank, and the biomembranes are attached to granules, degrade the residual organic matters in the sewage and convert ammonia nitrogen into nitrate nitrogen; one part of the discharged water of the aeration biological filter tank flows back into the anoxic tank, and the other part is discharged; one part of the mud generated by the secondary sedimentation tank back flows into the anoxic tank, and the other part of the mud is discharged out of a system. The sewage double-biomembrane deep treatment technology has the advantages of investment saving, low operation cost, little land occupation and good treatment effect.
Owner:宋乾武 +2
Self-sustaining type landscape restoration ecological floating island device
InactiveCN102531192APromote repairIncrease dissolved oxygenEnergy based wastewater treatmentBiological water/sewage treatmentSelf purificationNitrogen gas
The invention relates to an environmental engineering and water treatment technology and aims to provide a self-sustaining type landscape restoration ecological floating island device. The device comprises floating beds, floating islands which consist of aquatic plants planted between the floating beds, photocatalysis ribbons, and aeration devices which supply power by using solar systems; and each photocatalysis ribbon comprises a horizontal loading main body which is submerged below a water surface, a plurality of holes for circulating water bodies are distributed at the bottom of each photocatalysis ribbon, a carrier material loaded with a photochemical catalyst is fixed on the surface of each photocatalysis ribbon, and an overflow weir is arranged at the periphery of each photocatalysis ribbon. Each aeration device comprises an aeration pipeline and a motor. The organic matter and nitrogen and phosphorus are removed from eutrophic water by combining a photocatalysis technology, an ecological floating island technology and a solar energy technology; nitrate nitrogen and ammonia nitrogen are converted into nitrogen by the photocatalysis technology simultaneously; the accumulation of nitrogen pollutants is reduced, and nitrate is prevented from being converted into nitrite or ammonium; and dissolved oxygen in the water body is increased by using the aeration devices, and the self-purification capacity of the water body is improved, so the aim of restoring the eutrophic water well is fulfilled.
Owner:ZHEJIANG UNIV
Denitrified biological denitrificaion equipment of intensified internal source, and method
ActiveCN101003405AReduce aerationReduce hydraulic retention timeTreatment with aerobic and anaerobic processesSludgeHydrolysis
This invention discloses apparatus and method for biological denitrification of wastewater by reinforced inner source reverse nitrification. The method solves the problem of low denitrification efficiency, high operation energy consumption, large floor area, and high sludge productivity faced by present wastewater treatment techniques. The method comprises: introducing wastewater from inlet pipe into grid and sand-settlement pool for treatment, mixing with returned sludge from the precipitation pool, and sending into a hydrolysis and acidification pool to reduce sludge and raise wastewater biochemical capacity. The hydrolysis and acidification liquid is used as the carbon source for anaerobic pool denitrification to reinforce the inner source reverse nitrification process in the anaerobic pool. Organic matters in wastewater are completely removed in the aerobic pool, and ammonia and nitrogen are completely converted into nitrate nitrogen by nitrobacteria. Sludge and water are separated in the precipitation pool, the supernatant is discharged via the outlet pipe, and residual sludge is returned to the hydrolysis and acidification pool. The whole system discharges sludge from the hydrolysis and acidification pool. This invention has such advantages as low energy consumption, high efficiency, low investment.
Owner:CHONGQING KANGDA ENVIRONMENTAL PROTECTION IND GRP
Endophyte and application thereof
ActiveCN103275891APromote absorptionConvert moreBiocidePlant growth regulatorsMicroorganismBacillus megaterium
The invention discloses an endophyte which is classified and named Bacillus megaterium and is completely named Bacillus megaterium SAN1. The endophyte is preserved in the China General Microbiological Culture Collection Center (CGMCC) on March. 11, 2013 and has a preservation number of CGMCC No.7295. The invention also discloses an application of the endophyte in repair of facility soil secondary salinization and Cd combined pollution. The Bacillus megaterium CGMCC 7295 disclosed by the invention can be used for prompting growth of plants, improving physical and chemical properties of soil, promoting the plants to absorb Cd, effectively eliminating Cd pollution in the soil, efficiently converting nitrate nitrogen of soil and alleviating the hazards of secondary salinization; and due to combined action between the Bacillus megaterium CGMCC 7295 and the plants, the facility soil secondary salinization and the heavy metal Cd combined pollution can be repaired.
Owner:ZHEJIANG UNIV
Continuous flow urban sewage partial nitrification and anaerobic ammonia oxidation denitrification method
ActiveCN103086568AHigh recovery rateImprove realized recovery rateMultistage water/sewage treatmentActivated sludgeNitrate nitrogen
The invention discloses a continuous flow urban sewage partial nitrification and anaerobic ammonia oxidation denitrification method and belongs to the field of sewage. The method comprises the following steps of: allowing urban sewage to enter a biological adsorption reactor, adsorbing organic matters in water to activated sludge through the adsorption action of the activated sludge, and carrying out denitrification and anaerobic ammonia oxidation in an anoxic area of a partial nitrification anaerobic ammonia oxidation reactor to remove residual organic matters in water and nitrate nitrogen in return sludge; carrying out the partial nitrification in an aerobic area, and carrying out the anaerobic ammonia oxidation action in the anoxic area; repeating the actions in the aerobic area and the anoxic area; and finally, fulfilling the aim of removing nitrogen from the sludge.
Owner:上海立源生态工程有限公司
Process for treating nitrogen-containing wastewater by ion exchange and reclaiming ammonium nitrate
InactiveCN101891316AAchieve reuseFlexible operation and managementAmmonium nitratesWater/sewage treatment by ion-exchangeHigh concentrationStrong acids
The invention discloses a process for treating nitrogen-containing wastewater by ion exchange and reclaiming ammonium nitrate, and belongs to the technical field of environmental protection and wastewater treatment. The process is characterized in that: a strong acid cation exchanger and a weak alkali anion exchanger are connected in series to realize denitrification of the nitrogen-containing wastewater of a nitrogen fertilizer plant; the process is used for treating the high-concentration ammonia nitrogen and median-concentration nitrate nitrogen containing wastewater of the nitrogen fertilizer plant; strong acid cation exchange resin and weak alkali anion exchange resin are regenerated by adopting nitric acid and aqueous ammonia respectively; and the regenerated waste liquid ammonium nitrate is evaporated and concentrated to reclaim the ammonium nitrate. Compared with the traditional wastewater denitrification method, the process can remove ammonia nitrogen and nitrate nitrogen from the wastewater at the same time, reclaim the ammonium nitrate and recycle production water, does not produce secondary pollution, reclaims products from the pollutants, has obvious environmental benefit and economic benefit, and is a new path for treating the high-concentration ammonia nitrogen and median-concentration nitrate nitrogen containing wastewater of the nitrogen fertilizer plant.
Owner:TAIYUAN UNIV OF TECH
Multi-objective real-time optimization control method for sewage treatment process
ActiveCN106698642ALow running costGuaranteed uptimeWater treatment parameter controlBiological treatment regulationNitrate nitrogenWater quality
In allusion to the characteristics that in a sewage treatment process, the effluent water quality cannot reach the standard, the energy consumption is relatively high and the like, the invention provides a multi-objective real-time optimization control method for the sewage treatment process, by which optimization control over concentrations of dissolved oxygen SO and nitrate nitrogen SNO are achieved in the sewage treatment process. According to the optimization control method, an established energy consumption model and an established effluent water quality model, which are based on radial basis functions, are used as optimized objective functions, the optimized objective functions are treated via a multi-objective particle swarm algorithm to obtain optimized set values of the dissolved oxygen SO and the nitrate nitrogen SNO, and tracking control is performed on the optimized set values of the dissolved oxygen SO and the nitrate nitrogen SNO through a fuzzy neural network. According to the optimization control method, the problem of multi-objective real-time optimization control over the sewage treatment process is solved, the energy consumption is reduced on the basis that the effluent water quality is ensured, and high-efficiency and stable operation of a sewage treatment plant is promoted.
Owner:BEIJING UNIV OF TECH
Metal element improved biochar-based nitrate radical adsorbent and preparation method thereof
InactiveCN104258812AEfficient removalReduce pollutionOther chemical processesWater contaminantsAdsorption equilibriumSorbent
The invention discloses a metal element improved biochar-based nitrate radical adsorbent and a preparation method thereof. Straws are used as raw materials, and metal ions are impregnated, pyrolyzed and washed under certain conditions, so a metal ion improved cbiochar is prepared. According to the metal element improved biochar-based nitrate radical adsorbent and the preparation method thereof disclosed by the invention, by using adsorption research on nitrate radical waste water and comparing the adsorption effect of the biochar before and after improvement, the improved biochar prepared by the preparation method disclosed by the invention has good adsorption effect for potassium nitrate, wherein Mg<2+> improved wheat straw biochar has optimal adsorption effect for nitrate nitrogen; compared with the unmodified biochar, the Mg<2+> improved biochar prepared under the optimizing conditions has the advantages that the adsorption performance is improved by 10 times, and the adsorption equilibrium can be realized in a shorter time. The modified biochar adsorbent is a green adsorbent with application potential and can be used for effectively removing the nitrate nitrogen in a water body; besides, the effects of fixing carbon, reducing discharge and relieving the non-point source pollution are achieved.
Owner:JIANGSU ACADEMY OF AGRICULTURAL SCIENCES
Two-stage backflow simultaneous nitrogen and phosphorus removal device and technology for denitrification phosphorus removal, shortcut nitrification and anaerobic ammonia oxidation of municipal sewage
ActiveCN103588352AAlkalinity balanceEmission reductionMultistage water/sewage treatmentChemical oxygen demandNitration
The invention discloses two-stage backflow simultaneous nitrogen and phosphorus removal device and technology for denitrification phosphorus removal, shortcut nitrification and anaerobic ammonia oxidation of municipal sewage, and belongs to the field of sewage treatment. Municipal sewage enters an anaerobic / anoxic reactor after passing through a regulating reservoir; phosphorus-accumulating bacteria finish storage and phosphorus release of polyhydroxybutyrate (PHB) by using inflow chemical oxygen demand (COD) under an anaerobic condition; phosphorus-rich supernatant enters inside a middle reservoir through a water decanter, and is injected into a moving bed membrane bioreactor by a lift pump after the water quantity is adjusted; autotrophic nitrogen removal of the shortcut nitrification and anaerobic ammonia oxidation is achieved by alternate operation of low-oxygen aeration and anoxic agitation; the processed effluent enters the anaerobic / anoxic reactor again under the action of a suction pump; denitrification phosphorus removal is achieved after phosphorus-accumulating sludge containing the PHB and autotrophic denitrification effluent containing nitrate nitrogen are mixed. Simultaneous nitrogen and phosphorus removal of low-carbon municipal sewage is achieved by using coupling of three functional microorganisms for denitrification phosphorus removal, shortcut nitrification and anaerobic ammonia oxidation, and the two-stage backflow simultaneous nitrogen and phosphorus removal device has the advantages of being high-efficiency and energy-efficient, stable to run, and low in sludge yield.
Owner:贵州筑信水务环境产业有限公司
Polymorphic microorganism aggregate autotrophic nitrogen removal integrated device and operation method
ActiveCN103482763ACompact structureSimple structureWater contaminantsTreatment with anaerobic digestion processesHigh concentrationSludge
The invention discloses a polymorphic microorganism aggregate autotrophic nitrogen removal integrated device which is provided with a reaction tank, wherein the reaction tank is internally filled with microorganism aggregates and is provided with a water decanting device with a vertical push rod, fixed packing, an aerator, an online pH value detector, an online dissolved oxygen detector, an online ammonia nitrogen detector and an online nitrate nitrogen detector; the reaction tank is connected with a water inlet pipeline, a water outlet pipeline, a sludge outlet pipeline, an air pipeline, an overflow pipeline, a water inlet pump, a blast blower and an electrically operated valve; the reaction tank is also provided with an online gas flowmeter and a PLC (Programmable Logic Controller); the online gas flowmeter, the online pH value detector, the online dissolved oxygen detector, the online ammonia nitrogen detector and the online nitrate nitrogen detector are all connected with the PLC through signals. An operation method comprises the steps: (1) inoculating sludge; (2) carrying out habituated culture; (3) starting partial nitrification reaction; (4) inoculating anaerobic ammonium oxidization granular sludge; (5) proliferating the anaerobic ammonium oxidization granular sludge; (6) culturing an anaerobic ammonium oxidization bacterium biological film; (7) stably operating the autotrophic nitrogen removal integrated device. The polymorphic microorganism aggregate autotrophic nitrogen removal integrated device is suitable for denitrification treatment of medium and high concentration ammonia nitrogen sewage, simple in structure, high in degree of automation, good in denitrification effect and low in operation cost.
Owner:北京北排水务设计研究院有限公司 +1
Electrochemical reactor for processing nitrogenous organic wastewater, and application and processing method thereof
InactiveCN103193301AEfficient removalAmmonium Oxide StrongWater contaminantsWater/sewage treatment by magnetic/electric fieldsElectrochemical responseChemical oxygen demand
The invention discloses an electrochemical reactor for processing nitrogenous organic wastewater, and an application and a processing method thereof, and belongs to the field of processing nitrogenous organic wastewater. The device comprises a reaction container, a power supply, a gas outlet pipe, a water outlet pipe, a water outlet pipe valve and a water inlet system, and further comprises a packing material, a negative plate and a positive plate, wherein the packing material is formed by mixing active carbon and magnet particles; the negative plate is connected with the negative electrode of the power supply; the negative plate is a silicon dioxide plate loaded copper-palladium coating electrode, and the coating material consists of Pd and Cu at a mass ratio of 6: 1; and the positive plate is a digital subtraction angiography (DSA) oxide coating electrode Ti / IrO2-PtO2. The reactor is a batch-type operation three-dimensional electrode reactor which adopts a mixture of active carbon particles and magnet particles with similar diameter as the packing material, and has the functions of efficiently removing nitrate nitrogen, ammonia nitrogen and COD (chemical oxygen demand), and is low in energy consumption; and the reactor is capable of achieving a purpose of removing nitrogen and COD in the nitrogenous organic wastewater.
Owner:GUODIAN ENVIRONMENTAL PROTECTION RES INST CO LTD +1
Organic-inorganic mixed fertilizer containing alginic acid and production method thereof
The invention discloses an organic-inorganic mixed fertilizer containing alginic acid and a production method thereof. The organic-inorganic mixed fertilizer containing alginic acid comprises the following raw materials in parts by weight: 45-50 parts of carbamide, 18-20 parts of ammonium phosphate, 16-18 parts of potassium sulphate, 6-8 parts of seaweed fermentation residues, 8-10 parts of a seaweed synergist, 6-8 parts of a humic acid synergist, 3-5 parts of an EDTA chelated-state microelement fertilizer, 5-7 parts of plant ash, 3-5 parts of modified magnesia and 0.2-0.3 part of gibberellins. High-quality and high-effect synergist products are added into the technical field of value addition of the fertilizers, so that the high urease inhibition effect is achieved; the conversion from ammonium nitrogen to nitrate nitrogen is controlled; the utilization rate of the fertilizer is increased; the root growth of the crops is facilitated; the content of nutrient in the fertilizer is almost not influenced; the content of nitrogen in the value-added carbamide is not smaller than 30%; the organic-inorganic mixed fertilizer is obvious in synergistic effect and safe and effective in use; organic components are used for increasing the utilization rate of the fertilizer; inorganic components are used for improving the water-retaining property of the fertilizer; the action time of the fertilizer effect is prolonged; the absorption of nutrients in the crops is facilitated; the quality of agricultural products is improved.
Owner:SHANDONG ENBAO BIOTECH
Method for treating organic nitrogen in sewage
ActiveCN102531300AInorganic nitrogen concentration decreasedReduce eutrophicationWater contaminantsWater/sewage treatment bu osmosis/dialysisFiberFiltration
The invention discloses a method for treating organic nitrogen in sewage. The method comprises the following steps of: treating sewage by using a sequencing batch biofilm reactor, decomposing macromolecular organic nitrogen into micromolecular organic nitrogen under the coexistence of anaerobic, anoxic and aerobic conditions, removing the micromolecular organic nitrogen by using the degradation of microbes, and simultaneously removing ammonia nitrogen and nitrate nitrogen through short-cut nitrification and denitrification and anaerobic ammonium oxidation; and treating by using a coagulation-microfiltration method, precipitating to remove bacteria, suspended solids (SS) and other nitrogen-containing substances by adding a coagulant, and removing refractory macromolecular organic nitrogen such as humic acid, fulvic acid and the like through filtration of a hollow fiber microfiltration membrane to reduce the total amount of the organic nitrogen in the sewage. The invention also discloses a device for implementing the treatment method.
Owner:CHINESE RES ACAD OF ENVIRONMENTAL SCI
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