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551 results about "Organic substance degradation" patented technology
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Catalysis and micro-electrolysis combined technology for high-concentration refractory organic wastewater
InactiveCN101665311AReduce processing loadEasy to handleTreatment with aerobic and anaerobic processesMultistage water/sewage treatmentHigh concentrationElectrolysis
The invention relates to a catalysis and micro-electrolysis combined technology for high-concentration refractory organic wastewater; the organic wastewater is collected to an adjusting tank and enters an air floatation tank for air floatation treatment to remove part of the organic matters after the adjustment of water volume and water quality; the scruff is collected or recovered; the wastewatergoes through Ph adjustment and then enters a catalytic iron-carbon and micro-electrolysis unit to improve the biochemical quality; the effluent goes through Ph adjustment and then enters a sedimentation tank; the effluent of the sedimentation tank adopts anoxic-aerobic biochemistry treatment to remove the organic matters and ammonia nitrogen and then is emitted after reaching the standard; and the filler of the catalytic iron-carbon and micro-electrolysis unit comprises iron, carbon and a catalyst, wherein the mass ratio of the iron, carbon and catalyst is 1: (0.3-1.5): (0.01-0.5). The invention can effectively improve the micro-electrolysis electrochemical reaction efficiency and the degrading capability to the organic matters, and reduce the wastewater treatment cost with convenient technological operation.
Owner:CENT SOUTH UNIV
Industrial Wastewater Microwave Electrodeless UV Photocatalysis-Double Membrane Separation Coupling Treatment Device
InactiveCN102260003AAchieve coolingShort wavelengthWater/sewage treatment by irradiationWaste water treatment from animal husbandryIndustrial waste waterDecomposition
The present invention is an industrial waste water microwave electrodeless ultraviolet photocatalysis-dual membrane separation coupling treatment device, the device mainly consists of a reactor (1), a membrane separation system (2), a microwave electrodeless ultraviolet light source system (4), an aeration system, and an ozone tail gas decomposition device (7) connected to the reactor, and an inlet and outlet water system, wherein: the upper and lower parts of the reactor are respectively the reaction zone and the aeration zone, which are separated by a water distribution plate (5); the membrane separation system The microwave electrodeless ultraviolet light source system is located in the reaction zone and is separated by a corrugated partition (3); the aeration system is composed of a microporous aeration head (6) and a blower (8), and the microporous aeration head is located in the aeration At the bottom of the zone, the blower sends air to the aeration zone through the air duct. The invention has the characteristics of high reaction rate, complete degradation of organic matter, long-term operation and the like, and has strong operability and high safety. It is suitable for the treatment of refractory organic industrial wastewater, and it is also suitable for sterilization and disinfection in the field of water supply.
Owner:WUHAN TEXTILE UNIV
SBR alternant aerobic/anaerobic technology for biological denitrification and real time control device and method thereof
InactiveCN1569690AIncrease speedShort reaction timeTreatment with aerobic and anaerobic processesSludgeTime control
The invention discloses a SBR alternant aerobic / anaerobic technology for biological denitrification and real time control device and method thereof which consists of, dividing the waste water to be treated into three portions, loading each portion into a reactor, alternatively carrying out the operating mode of aerobic aeration and anoxybiotic agitating under real time procedure control, so as to realize the organics degradation and nitrogen-containing compound removal.
Owner:BEIJING TANSI ENVIRONMENTAL PROTECTION TECHCO
A kind of method for treating chlorine-containing organic wastewater by heterogeneous fenton-like reaction
InactiveCN102295341AEfficient removalQuick removalMetal/metal-oxides/metal-hydroxide catalystsWater/sewage treatment by oxidationFenton reactionSoil organic matter
The invention discloses a method for treating chlorine-containing organic waste water by a heterogeneous phase Fenton-like reaction, which belongs to the technical field of environment protection. The method adopts nanometer FeO, nanometer Fe3O4 or a mixture of nanometer FeO / Fe3O4 as a Fenton-like catalyst, and allows chlorine-containing organic waste water to react in the presence of both the Fenton-like catalyst and H2O2 so as to degrade chloro-substituted organic matter in the waste water. The invention has simple equipment, convenient operations, easily available reagents, can efficiently remove chlorine-containing organic matter in waste water within a wide pH range (Ph 2.0-6.3), and has great application prospects.
Owner:TSINGHUA UNIV
Method and apparatus for treating aqueous medium
InactiveUS6572759B1From normal temperature solutionsLiquid separation by electricityElectricityElectrolysis
An object of the present invention is to provide a process and an apparatus for treating an aqueous medium at low running costs with a decreased electricity required for hydrothermal electrolytic reaction. The present invention proposes a two-step process comprising a first step of performing a conventional hydrothermal reaction or a conventional electrolytic reaction prior to hydrothermal electrolytic reaction to degrade readily degradable substances or ammonia or various electrolytically degradable organics and then a second step of performing hydrothermal electrolytic reaction to degrade the remaining organics, whereby the electricity consumed by hydrothermal electrolytic reaction in the second step can be greatly reduced.
Owner:EBARA CORP
Regenerable heterogeneous Fenton catalyst, and preparation method and application thereof
ActiveCN105478155AImprove stabilityGood regeneration performanceMolecular sieve catalystsWater treatment compoundsPhenolPollution
The invention specifically relates to a regenerable heterogeneous Fenton catalyst, and a preparation method and application thereof, which belongs to the technical field of industrial catalysts. The catalyst provided by the invention uses commercial zeolite as a carrier and is prepared through the following steps: surface modification of the carrier with a high polymer; loading of an active component Fe or Co; and roasting so as to form an iron or cobalt compound-valence oxide on the surface of zeolite. The catalyst shows high-efficiency degradability to industrial intractable organic waste water containing phenols, dyes or the like, and the degradation rate of organic matters in waste water is up to more than 90% at room temperature (less than 30 DEG C) under an almost neutral condition (wherein a pH value is in a range of 6 to 8); and the catalyst has good regeneration performance. According to the method, the heterogeneous Fenton catalyst is used for oxidation removal of organic matters like phenols and dyes in waste water, so cost is low and no secondary pollution is produced; and a process for treating waste water with the Fenton catalyst is a promising organic waste water treatment process.
Owner:FUDAN UNIV
Sewage treatment system
InactiveCN104761100AComprehensivenessAdvantages FlexibilityMultistage water/sewage treatmentNitrogen removalWater quality
The invention relates to a sewage treatment system comprising: a pre-anoxic tank which is connected to a sewage inlet pipeline and is used for an anoxic denitrification reaction of returned sludge and the sewage; an anaerobic tank which is connected to the sewage inlet pipeline and communicated with the pre-anoxic tank and is used for anaerobic phosphorus releasing during biochemical dephosphorization; an anoxic tank which is connected to the sewage inlet pipeline and communicated with the anaerobic tank and is used for nitrogen removal by denitrification; an aerobic tank which is communicated with the anoxic tank and is used for degrading organic substances, nitrating organic nitrogen and ammonic nitrogen and absorbing phosphorus; a post-anoxia tank which is communicated with the aerobic tank and is used for performing nitration and denitrification at the same time; and a sequencing batch sloping plate sedimentation tank which is communicated with the post-anoxia tank and is used for separating muddy water and concentrating the returned sludge, herein the returned sludge is flown back to the pre-anoxic tank. The sewage treatment system is excellent in comprehensiveness and flexibility and can flexibly fit various water quality and treatment requirements generally.
Owner:DONGGUAN ZHIHUI WATER TECH
Method and device for treating domestic sewage by earthworm strengthened artificial wet land
InactiveCN101121570AIncrease concentrationGood removal effectMultistage water/sewage treatmentSustainable biological treatmentConstructed wetlandResource utilization
The present invention discloses a sewage treatment method and device by the angleworm strengthening with manual everglade; the method is to put one type of angleworm with sewage treatment effect into the wet soil of the device in order to improve the oxygen-distribution situation in the existing manual everglade treatment technical; the method can overcome the shortcoming that: the existing sewage treatment is easy to be blocked and the effect for de-nitrogen and de-phosphor is much worse. The method can enhance the effect of organic substance separating and de-nitrogen and de-phosphor and prolong the everglade filling and exchanging period. The sewage after being treated can reach the drainage standard and realize the resource utilization requirement.
Owner:SOUTHEAST UNIV +2
Method and equipment for treating high-concentration refractory chemical wastewater
InactiveCN103992013AGood processing effectMultistage water/sewage treatmentHigh concentrationInorganic salts
The invention discloses a method and equipment for treating high-concentration refractory chemical wastewater. The method is formed by organically combining an efficient inorganic salt and organic salt separation technology, an improved organic matter degradation technology and an efficient organic matter filtration removal technology. The method is relatively low in treatment cost, relatively high in efficiency, relatively good in effect and capable of enhancing the biological reduction of refractory organisms and reducing environment pollution caused by chemical wastewater.
Owner:LIYANG SHENGTAI HEAVY MACHINERY
Preparation of Ni<2+> doped geopolymer catalyst and its application in organic matter degradation
InactiveCN102430419ASimple processRealize large-scale preparationWater/sewage treatment by irradiationWater contaminantsSlagIon exchange
The invention discloses preparation of a Ni<2+> doped geopolymer catalyst and application of the catalyst in organic matter degradation. The preparation method utilizes industrial solid waste fly ash or mineral slag or steel slag as the raw material, which, excited by a chemical exciting agent sodium silicate, can generate a fly ash or mineral slag or steel slag based geopolymer respectively. Then through NH4<+> and Ni<2+> ion exchange reactions in order, a Ni<2+> doped geopolymer catalyst can be generated. The catalyst can be used for degradation reaction of methylene blue in industrial wastewater and has a degradation rate up to 77.29%. The preparation and organic matter degradation processes have the advantages of simplicity and practicability, no need for heating, energy saving and environmental protection, thus being able to realize large scale preparation and application.
Owner:XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
Method for treating organic polluted soil
ActiveCN102513345AImprove biodegradabilityRemove completelyContaminated soil reclamationPollution soilPollution
The invention relates to a method for treating organic polluted soil. The method comprises the following steps of: performing ozone oxidation treatment on the organic polluted soil, and then performing biodegradation treatment on the soil subjected to the ozone oxidation treatment. Non-degradable organic substances in the soil are degraded into small molecular degradable organic substances by using the strong oxidation effect of ozone, so that the biodegradability of the substances is improved, and a good foundation is laid for the next biological treatment. The biodegradation method adopted after the ozone treatment is low in cost and most obvious in effect and does not cause the problem of secondary pollution. Further, based on the ozone oxidation treatment and the biodegradation treatment, vetiveria zizanioides is planted, and microbes can be successfully distributed in the polluted soil by using the well-developed root system of the vetiveria zizanioides, so that the pollutants inthe soil are thoroughly removed. Compared with the prior art, the invention has the advantages that: the method is easy and convenient to operate, economic and practical; and by the method, the medium organic substance polluted soil can meet the requirements of related standards after only 5 to 8 months of treatment.
Owner:苏州市环境科学研究所
Mycobacterium 16F for efficiently degrading polycyclic aromatic hydrocarbons and benzene organic matters and application thereof
ActiveCN102899271AEfficient degradationDegradation safetyBacteriaMicrobiological testing/measurementKanamycinM-Xylene
The invention provides a strain of Mycobacterium sp.16F for efficiently degrading polycyclic aromatic hydrocarbon and benzene organic matters, which has a preservation number of CGMCC No.6367. The mycobacterium 16F can efficiently, safely and rapidly degrade polycyclic aromatic hydrocarbons and benzene organic matters, can grow and degrade by using fluorene, naphthalene, anthracene, acenaphthene, phenanthrene, pyrene and benzopyrene as the sole carbon source and energy in aerobic condition, and can utilize benzene, m-xylene, toluene, salicylic acid, catechol and other multiple aromatic organic matters. The mycobacterium 16F is sensitive to streptomycin, rifampin, tetracycline, kanamycins and other antibiotics, has good degradation effects to mixed polycyclic aromatic hydrocarbons in aging soils and monocyclic benzene organic matters in water bodies, can be used for restoring and purifying the water-soil environment combinedly polluted by aromatic hydrocarbon organic matters, is important for promoting sustainable development, and has a wide application prospect.
Owner:ENVIRONMENTAL PROTECTION RES INST OF LIGHT IND
Composite purifying agent used for purifying sewage in river channel
ActiveCN102583600AImprove adsorption removal effectEasy to handleWater/sewage treatment by flocculation/precipitationWater/sewage treatment by sorptionChemical oxygen demandTurbidity
The invention relates to a composite purifying agent used for purifying sewage in a river channel, which comprises the following components by weight: 40% to 90% of benzalkonium chloride, 5% to 25% of polymerization ferric sulfate, 4% to 15% of polyacrylamide, 0.5% to 10% of activated carbon and 0.5% to 10% of effervescent disintegrant. The composite purifying agent further comprises an organic matter degradation agent occupying 0.5-5wt% of the total dose of the composite purifying agent. The composite purifying agent is easy to decompose, fewer in dosage, free of residual, free of secondarypollution, simple and convenient in operation, short in time required to purify water, capable of effectively removing bacteria and algae, degrading organic matter, precipitating floating floc and the like, capable of effectively removing chemical oxygen demand, total nitrogen, total phosphorus and the like, remarkable in turbidity and capable of effectively improving PH and chromaticity of waterbody, thereby being an effective water purifying agent of water bodies such as river channels, lakes and the like.
Owner:浙江一清环保工程有限公司
Artificial wetland coupling microbial fuel cell (MFC) system and method for improving removal efficiency of organic matters
InactiveCN102351387AExpand pathways for degradationImprove power generation performanceMultistage water/sewage treatmentConductive materialsWetland
The invention discloses an artificial wetland coupling microbial fuel cell (MFC) system. The system is characterized by consisting of an artificial wetland loaded with an MFC and is provided with a coarse grit layer, an activated carbon layer, an insulation grit layer, a top conducting material layer and plants from bottom to top, wherein the cathode of the MFC is formed by the activated carbon layer; the anode of the MFC is formed by the top conducting material layer; and an anode electrode and a cathode electrode are led out through conducting wires and connected with an external circuit respectively. The invention also discloses a method for improving the removal efficiency of organic matters by using the artificial wetland coupling MFC system. By the artificial wetland coupling MFC system, the degradation way of the organic matters is expanded, the removal efficiency of the organic matters, particularly organic matters which are difficult to degrade are substantially improved, andthe electricity production performance of the MFC is improved at the same time; electric energy is acquired while wastewater is promoted to degrade; and the system and the method are effective ways for relieving the current energy crisis and solving environmental problems, and have immeasurable development potential.
Owner:SOUTHEAST UNIV
Rare-earth doped titanium-base SnO2 electrolytic electrode and its preparation
ActiveCN1896320AHigh oxygen evolution potentialPromote degradationElectrodesRare-earth elementTitanium electrode
A rare earth-doped Ti-base SnO2 electrocatalytic electrode relates to one type of DSA electrode and its preparing process. The rare earth-doped electrode in this invention is composed of the Titanium substrate and the rare earth-doped SnO2 coat in which the mol ratio of Sn, rare earth elements and Sb is 75-99.8:0.1-10:0.1-15. In this process the Titanium electrode is polished, washed with alkaline and acid, then undergoes delaminated impregnation and gradient temperature rise to realize the formation of the functionally gradient membrane that endows the electrode with relatively high potential of oxygen evolution, strong degrading ability of organic compounds and inert composition without dissolving out. The electrode has strong degrading ability especially of the materials persistent to biodegration or toxic to organisms.
Owner:HARBIN INST OF TECH
Method and device for treating micro-polluted surface water
InactiveCN101580328AIncrease profitImprove throughputTreatment using aerobic processesWater/sewage treatment bu osmosis/dialysisUltrafiltrationSludge
The invention provides a method and a device for treating micro-polluted surface water. The method comprises the following steps: a biological filter, coagulation sedimentation and ultrafiltration are combined; raw water enters the biological filter; microorganisms degrade the ammonia nitrogen and partial low molecular weight organic matters in the inlet water; organic matters which are hard to be degraded by the microorganisms, such as humus, are removed from the outlet water through coagulation sedimentation; finally organic matters, most turbidity, microorganisms and partial viruses are further removed through an external ultrafiltration membrane module; the ultrafiltered outlet water is high quality drinking water after being disinfected and can be transported to users after chlorine supplement and ozonization; ultrafiltered concentrated solution reflows to a coagulation sedimentation pond and solid-liquid separation is realized by discharge of sludge from the sedimentation pond; the ultrafiltration membrane module is backwashed by a membrane backwashing system periodically during ultrafiltration operation. The invention organically combines biodegradation, coagulation and physical interception of ultrafiltration, has good effect on removing ammonia nitrogen, organic matters and the like in the micro-polluted surface water and is a novel drinking water deep purification process.
Owner:TSINGHUA UNIV +1
Bioaugmentation treatment technology of high ammonia nitrogen wastewater
InactiveCN101973678AIncrease the number ofSmall footprintMultistage water/sewage treatmentHigh concentrationSludge
The invention relates to a bioaugmentation treatment technology of the high ammonia nitrogen wastewater. The treatment technology is characterized in that under the condition that dissolved oxygen exists in the high ammonia nitrogen wastewater, an aerobic pool, an aerobic filter and a membrane pool are established, wherein by utilizing the metabolism of the aerobic microorganism, high concentration of organic substances are degraded, the organic substances with high molecular weight and energy are converted to substances with low molecular weight and energy; the aerobic pool adopts internal circulation and large-scale external circulation hydraulic agitation; and the aerobic filter is filled with novel fixed enzyme-floating filler and immobilized microorganism and microporous aeration and jet aeration are combined for aeration, thus the flow pattern of the nitrification filter is improved. Compared with the prior art, the system of the invention has high sludge concentration and the corresponding volume loading is also high, thus the floor space is small and the capital cost is low; the conversion rate and utilization rate of atmospheric oxygen is high, the effect of mass transfer is good, the anti-shock loading capability of the system is high, the effluent quality is stable; the operating cost is low; the density is increased relatively, the solid-liquid separating effect is good and the yield of excess sludge is low.
Owner:SHANGHAI HONESS ENVIRONMENTAL TECH CORP
Preparation method of solid acid Fenton catalyst for processing methyl orange waste water
InactiveCN102228832AIncrease consumptionGreen and efficient degradationWaste water treatment from textile industryMetal/metal-oxides/metal-hydroxide catalystsPtru catalystCyclodextrin
The invention discloses a preparation method of a solid acid Fenton catalyst for processing methyl orange waste water, comprising the following steps: a, using granular starch, glucose or beta-cyclodextrin as raw material, adding concentrated sulfuric acid for carbonization at the temperature of 120 DEG C; b, cooling the carbonized material to room temperature, then washing; c, drying and grinding; d, adding active components for dipping, then washing; e, drying the obtained solid for 8-10h at the temperature of 110 DEG C; and f, after drying, roasting at the temperature of 300-700 DEG C, cooling to room temperature to obtain the corresponding solid acid heterogeneous Fenton catalyst. The prepared catalyst solves the problems of loss of active components, large liquid acid consumption, low utilization rate of H2O2, equipment corrosion, environmental pollution seriously and the like in traditional heterogeneous Fenton catalytic oxidation process, and is a green and high effective organic substance degraded Fenton catalyst.
Owner:CHONGQING UNIV OF TECH
Visible-light response type photocatalysis wastewater fuel cell, manufacture method thereof and application thereof
InactiveCN103367759AImprove utilization efficiencyImprove battery efficiencyWater/sewage treatment by irradiationCell electrodesOxygenSodium sulfate
Owner:SHANGHAI JIAO TONG UNIV
Anaerobic-aerobic integrated microbial fuel cell wastewater treatment system
ActiveCN102276064ABiochemical fuel cellsTreatment with aerobic and anaerobic processesResource utilizationOperation mode
The invention relates to an anaerobic-aerobic integrated microbial fuel cell wastewater treatment system. Facultative power-generating bacteria and facultative degrading bacteria are constructed in an anode chamber of a microbial fuel cell and the alternate anaerobic-aerobic operation mode is adopted, thus the aim of utilizing the anaerobic power generation of the organic matter and realizing aerobic degradation can be achieved. By adopting the system, the problem that when the past microbial fuel cell system utilizes organic wastewater to generate power, the degradation of the organic matter is not complete, can be overcome and the resource utilization and harmless emission of organic wastewater can be realized. The system has the following specific characteristics: the fuel cell system comprises a cathode chamber, the anode chamber, an anode in the anode chamber, a cathode in the cathode chamber, a diaphragm between the cathode and the anode and aeration headers arranged in the cathode chamber and the anode chamber; the facultative power-generating microorganisms are attached to the anode of the anode chamber, the facultative degrading microorganisms exist in the solution of the anode chamber; and the alternate anaerobic-aerobic operation mode is adopted to realize wastewater power generation under the anaerobic condition and the rapid degradation of the organic matter under the aerobic condition.
Owner:BEIJING NORMAL UNIVERSITY
Method for degrading organic matters in water by activated persulfate coupling system
InactiveCN106955708ACompletely degradedReduce secondary pollutionWater/sewage treatment by irradiationWater contaminantsUltraviolet lightsDissolution
The invention discloses a method for degrading organic matters in water by an activated persulfate coupling system, and is realized through the following steps: firstly, preparing TiO2 porous microspheres; then, preparing FeCo / TiO2; finally, fully mixing the FeCo / TiO2 with aqueous solution which contains organic matters, adding the persulfate, meanwhile, irradiating by ultraviolet rays, and activating to generate SO4<->. and.OH under the synergistic effect of the FeCo / TiO2 and ultraviolet light so as to degrade most parts of organic pollutants in wastewater. The method has a simple processing technology, the organic wastewater can be subjected to up-to-standard emission only through one-step reaction, cobalt ion and iron ion dissolution rates are extremely low, environment pollution is lightened, organic matter degradation efficiency in the wastewater is higher under acidic, neutral and alkaline conditions, and the stable treatment of the organic wastewater under a situation of various pH (Potential of Hydrogen) values is realized.
Owner:XIAN UNIV OF SCI & TECH
Process of treating glyphosate mother solution by catalytic air oxidation method
ActiveCN102795734ACompletely degradedRaw material cleaningDispersed particle separationWater/sewage treatment bu osmosis/dialysisSolution treatmentPhosphate
The invention relates to a glyphosate mother solution treatment process by means of a catalytic air oxidation method. Aiming to solve the problem of incomplete degradation of phosphorus-containing organics in treatment of a glyphosate mother solution by an oxidation method, the invention provides a process of treating a glyphosate mother solution by a catalytic air oxidation method. The process includes the steps of: first using a heat exchanger to heat the glyphosate mother solution to a temperature of 110-120DEG C, then bringing the glyphosate mother solution into a reactor in which a catalyst and a heating electric furnace are disposed, controlling the reaction temperature at 200-300DEG C, the reaction pressure at 5-9Mpa, as well as the mother solution and air in a ratio of 1:120-200(g / l), carrying out reaction for 5-15min, then performing crystallization separation, and recycling the obtained phosphate and salt. The process has a low treatment cost, the oxidizing agent is clean, inexpensive, and easily available, and organics can be degraded more completely.
Owner:福华通达化学股份公司
Constant water level sequencing batch active sludge process and system for treating sewage
ActiveCN1986455ASmall footprintEasy maintenanceTreatment with aerobic and anaerobic processesSettling basinSmall footprint
The present invention is constant water level sequencing batch active sludge process for treating sewage, and belongs to the field of sewage treating technology. The process includes pre-treating sewage in grille and settling basin, treating partial sewage in the anoxia pond and the other in the anaerobic pond with sludge, treating in the aerobic pond to degrade organic matter, eliminate ammonia nitrogen and absorb phosphorus from sewage, and final flowing into the sequencing batch pond for exhausting water reaching the drainage standard. The present invention has the advantages of high treating efficiency, stable running, high apparatus utilization rate, low power consumption, etc.
Owner:THUNIP CORP LTD
Dry fermentation device and dry fermentation method to prepare biogas through high-concentration solid raw materials
ActiveCN103131631AImprove distributionInoculate evenlyGas production bioreactorsWaste based fuelHigh concentrationOrganic matter
The invention discloses a dry fermentation device and a dry fermentation method to prepare biogas through high-concentration solid raw materials. The raw materials are reasonably distributed, inoculation is uniform, acidification is not prone to occurrence, organic matter degradation is sufficient, the materials are discharged easily, a function of solid-liquid separation is provided, secondary pollution is avoided, biogas residue can be converted into fertilizer, and therefore the dry fermentation device and the dry fermentation method to prepare the biogas through the high-concentration solid raw materials become an important choice for efficiently (high content of solid) processing fermentable organic waste in the fields of industry and agriculture.
Owner:GUANGZHOU INST OF ENERGY CONVERSION - CHINESE ACAD OF SCI
Processing method of Cu(II)-EDTA (Ethylene Diamine Tetraacetic Acid) wastewater
InactiveCN102910762AHigh mineralization rateImprove recycling ratesMultistage water/sewage treatmentCopper oxides/halidesEthylene diamineEconomic benefits
The invention discloses a processing method of Cu(II)-EDTA (Ethylene Diamine Tetraacetic Acid) wastewater, for solving the problems that the conventional wastewater processing method is high in cost and easily causes secondary pollution and has a trivial process. The processing method comprises the following steps of: measuring the concentration of COD and Cu<2+> in the Cu(II)-EDTA wastewater before processing; adjusting the pH value of Cu(II)-EDTA wastewater in a reaction tank I to 3-6, adding catalysts and an oxidant into the reaction tank I, and stirring and reacting for 0.5 hour to 3 hours, thus obtaining the reacted Cu(II)-EDTA wastewater; and standing the reacted Cu(II)-EDTA wastewater, discharging supernatant liquor of the wastewater into a reaction tank II, adding NaOH into the supernatant liquor of the wastewater to adjust the pH value of the supernatant liquor to 11-12, standing for getting sediments, and filtering, washing and calcining the sediments to obtain copper oxide, wherein sediments in the reaction tank I are recycled as the catalysts after being dried. The processing method has the advantages of degrading organic matter and recycling copper, and has environment-friendly and economic benefits.
Owner:HANGZHOU DIANZI UNIV
Synthesis method of surface hydrophobicity bismuth orthovanadate with performance of catalyzing and degrading pollutant by visible light
InactiveCN101811040AHydrophobicImprove adsorption capacityVanadium compoundsBismuth compoundsSurface-active agentsPhotochemistry
The invention relates to a synthesis method of surface hydrophobicity bismuth orthovanadate with the performance of catalyzing and degrading pollutant by visible light. The synthesis method comprises the steps of: mixing solid bismuth nitrate compound and solid vanadium-containing compound according to the molar ratio between bismuth and vanadium of 1:1; then, adding the mixture into the solutionof distilled water and surface active agent, stirring for 72-120h by magnetic force, filtering, respectively washing by the distilled water and absolute ethyl alcohol, drying and then grinding into powder, and obtaining bismuth orthovanadate precursor; putting the bismuth orthovanadate precursor into a reaction kettle, carrying out heat treatment for 24h in water at 140-200 DEG C, cooling and then filtering, respectively washing by the distilled water and the absolute ethyl alcohol, drying and then grinding into powder, and obtaining the surface hydrophobicity bismuth orthovanadate. The method has simple operation, mild condition, uniform prepared bismuth orthovanadate powder granules and a surface with hydrophobicity, and is beneficial to absorbing organic matter on the surface when being used for degrading the organic matter under the irradiation of the visible light so as to enhance the catalytic activity.
Owner:QINGDAO UNIV
Method for producing big Clitocybe by using mulberry stems, sugarcane bagasse and silkworm excrement
InactiveCN106034742AEasy to makePromote formationMagnesium fertilisersAlkali orthophosphate fertiliserFiberBombyx mori
The invention relates to a method for producing big Clitocybe by using mulberry stems, sugarcane bagasse and silkworm excrement. The mulberry stems and sugarcane bagasse are common agricultural residue in Guangxi; the mulberry stems, the sugarcane bagasse and the silkworm excrement are prepared into a cultivation material; fermentation is performed on the cultivation material through mixed bacteria, degradation of organic matters of the raw materials can be accelerated, and conversion of the organic matters is fast; degradation of organic matters is promoted, crude fiber of the mulberry stems and the sugarcane bagasse can be fully utilized to improve the nutriment content of the cultivation material, and high yield of the big Clitocybe can be achieved; and the quality of the big Clitocybe can be improved through organic nutriments of the silkworm excrement, and the economic benefits can be increased.
Owner:广西南宁北部湾现代农业有限公司
Supercritical water oxidation treatment system and supercritical water oxidation treatment system process for high-concentration dyeing sludge
InactiveCN105293856AChange trafficPrecise regulation of pressure dropSludge treatment by oxidationHigh concentrationTransformer
The invention provides a supercritical water oxidation treatment system and a supercritical water oxidation treatment system process for high-concentration dyeing sludge. After the high-concentration dyeing sludge is ground, the particle sizes of insoluble particles are reduced, and high-flow-speed suspension conveying can be realized; the sludge is further subjected to pyrohydrolysis, cell walls are broken and the viscosity is remarkably reduced; the sludge can be stably conveyed through a high-pressure diaphragm pump and enters into a heat exchanger for preheating, so that the required temperature is reached; subsequently, the sludge and oxygen jointly enter into an inlet in the upper part of a reactor, materials completely react in the up-down flowing process, organic matters are degraded and inorganic salts are separated out; the inorganic salts are secondarily dissolved by the cooling of a small amount of reacted clean fluid introduced from an inlet in the upper part of a third heat exchanger and sludge at the inner pipe side of a fourth heat exchanger; materials flow out of a cone base at the lower part of the reactor for heating soften water to generate steam and preheating the materials; cooled and reacted fluid is decompressed through coarse adjustment of a capillary step-down transformer and fine conditions of flow; decompressed fluid is separated through a pipeline filter to obtain a solid which is finally collected into a liquid collecting tank.
Owner:山川丽(苏州)环保科技有限公司
Distribution treatment combination technological method for domestic sewage of small-sized towns
ActiveCN102603116APrevent eutrophicationAchieve recyclingMultistage water/sewage treatmentConstructed wetlandParticulates
The invention discloses a distribution treatment combination technological method for domestic sewage of small-sized towns. The distribution treatment combination technological method includes steps: S1, water collection regulation treatment: leading the sewage to enter a water collecting and regulating tank and lifting the sewage by a submersible pump after solid residues in the sewage is removed by a porous grating pipe; S2: integral biological treatment: sequentially carrying out a primary sedimentation process, an anoxia process, a rotary biological treatment process and a secondary sedimentation process; S3, treatment by the aid of an artificial wetland: feeding the sewage to the subsurface artificial wetland; and S4, disinfection. In the primary sedimentation process, parts of suspended matters and inorganic particulate matters are absorbed and settled, and simultaneously, parts of organic matters are removed; a denitrification process is complete din the anoxia process; organicmatters which are not removed are degraded in the rotary biological treatment process; and in the secondary sedimentation process, suspended matters in the sewage are settled, and the sewage is clarified. The combination technological method has the advantages of fine denitrification effect, low excess sludge quantity, high standards of treated yielded water, low energy consumption and running cost and simplicity in management and maintenance, and is suitable for popularization and application in the small-sized towns.
Owner:EVERBRIGHT ENVIRONMENTAL PROTECTION TECHCAL DEV BEIJING +1
Aluminium-oxide-supported iron oxides catalyst, preparation method and application thereof to organic wastewater processing
InactiveCN105289610ACompletely degradedIncrease reaction rateMetal/metal-oxides/metal-hydroxide catalystsWater/sewage treatment by oxidationIron saltsWater processing
The invention discloses a preparation method for an aluminium-oxide-supported iron oxides catalyst, and application of the catalyst to organic wastewater processing. The preparation method comprises the following steps: (1) firstly cleaning an aluminium oxide particle with clean water, and then modifying the aluminium oxide particle by using a low-pressure plasma, so as to obtain modified aluminium oxide; (2) fully dipping the modified aluminium oxide obtained in the step (1) in an iron salt solution, and then drying, so as to obtain iron-loaded aluminium oxide; and (3) calcining the iron-loaded aluminium oxide obtained in the step (2), so as to obtain the aluminium-oxide-supported iron oxides catalyst after calcining is finished. The aluminium-oxide-supported iron oxides catalys obtained by employing the preparation method possesses the advantages of being fast in reaction speed, relatively thorough in organics degradation, high in ozone utilization rate and the like during organic waste water processing.
Owner:建德市环保科技创新创业中心有限公司 +1
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