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335results about How to "Reduce COD" patented technology

Complex heavy-metal waste water emergency quick treatment method

The invention relates to a complex heavy-metal waste water emergency quick treatment method, comprising the following steps of: filtering by a sand filter; mixing by a high-speed pump; carrying out an ultraviolet catalyzing ozone reaction; carrying a microwave catalyzing active carbon reaction; carrying micro-electrolytic reaction; circulating waste water; carrying out a Fenton reaction; carryingout electric flocculation on an aluminum electrode plate; and pressing and filtering sludge. Waster water in a circulating slot is pumped into an iron carbon fluidized bed by a fluidizing pump to be circularly treated; an air compressor is connected with the iron carbon fluidized bed and prevents a filler in the iron carbon fluidized bed from blocking; and the microwave active carbon reactor is an active carbon filling tower, and a microwave emitter is arranged outside the body of the active carbon filling tower. The complex heavy-metal waste water emergency quick treatment method disclosed by the invention is used for treating the complex heavy-metal waste water, associated devices are simple, easy, quick, can meet an emergency, and can update and convert, no various chemical raw materials are fed, and various complex heavy-metal waste water with unknown elements can be quickly treated as long as the current magnitude is regulated, and thus the heavy metal in the waste water and chemical oxygen demand can immediately reach the standard and are discharged.
Owner:东莞市珠江海咸水淡化研究所有限公司

Advanced oxidative coupling device and process for treating organic wastewater difficult to degrade

The invention discloses an advanced oxidative coupling device and process for treating organic wastewater difficult to degrade. A main device body comprises an ozone oxidation-multi-dimensional electro-catalysis/microelectrolysis area, an ozone oxidation-microelectrolysis/Fenton area, a coagulation area and an inclined plate sedimentation area, wherein the ozone oxidation-multi-dimensional electro-catalysis/microelectrolysis area comprises a multi-dimensional electrolysis/microelectrolysis area at the upper part and an ozone oxidation area at the lower part; the ozone oxidation-microelectrolysis/Fenton area comprises a microelectrolysis/Fenton area at the upper part and an ozone oxidation area at the lower part. The device combines four levels of advanced oxidation systems, and electrocatalytic oxidation, ozone oxidation, Fenton oxidation and a microelectrolysis reaction are mutually coupled in function, so that an organic matter difficult to degrade is subjected to multi-level oxidation to realize complete oxidative cracking; when the device is used for treating the organic wastewater difficult to degrade, the yield and the production rate of *OH are increased, the liquid phase transfer process is accelerated, the overall current efficiency of the device is increased, operation expenses are saved, flexible regulation and control of a process unit are realized, and the device can be used for treating various kinds of organic wastewater difficult to degrade.
Owner:AEROSPACE KAITIAN ENVIRONMENTAL TECH CO LTD +1

Productive technology of vanlillin by glyoxylic acid method

The invention discloses a productive technology of vanlillin by a glyoxylic acid method. The productive technology comprises a synthesis process, a fractionation process and a purification process, wherein the synthesis process comprises condensation treatment, oxidation treatment and decarboxylation treatment of methyl catechol and glyoxylic acid. The productive technology particularly comprisesthe following steps: respectively converting the methyl catechol and the glyoxylic acid into guaiacol sodium and sodium glyoxylate in a sodium hydroxide system; carrying out condensation treatment onthe guaiacol sodium and the sodium glyoxylate; after recovering the unreacted methyl catechol in a condensation liquid, carrying out oxidation treatment, namely carrying out catalytic oxidation on anethanol group in 4-hydroxy-3-methoxybenzene sodium glycolate by using copper oxide in the sodium hydroxide system to form a ketone group, thereby generating a corresponding ketonic acid compound; after separating red copper oxide particles from an oxidation liquid, carrying out decarboxylation treatment, namely using sulfuric acid to acidize the oxidation liquid, and simultaneously converting an acid group in the ketonic acid compound into carbon dioxide so as to generate 4-hydroxy-3- methoxybenzaldehyde; and carrying out the fractionation process and the purification process to obtain the vanlillin.
Owner:喜孚狮王龙香料(宁波)有限公司

A surface sizing agent for papermaking, and a papermaking method for improving paper strength and water resistance

The invention discloses a surface sizing agent for papermaking, and a papermaking method for improving paper strength and water resistance. An active component of the surface sizing agent is prepared by a polymer polysaccharide compound and phyllosilicate in a weight ratio of 99.5-5:0.5-95. The papermaking method includes: preparing water-containing fiber papermaking pulp, an aqueous solution of the polymer polysaccharide compound, and a phyllosilicate-containing colloid solution or dispersion, mixing the phyllosilicate-containing colloid solution or dispersion and the aqueous solution of the polymer polysaccharide compound to obtain a surface sizing solution, feeding the water-containing fiber papermaking pulp onto a screen, filtering water to form paper sheets, allowing the paper sheets to pass through a dehydration process and a drying process to obtain base paper, coating the surfaces of the base paper with the surface sizing solution to obtain sized paper sheets, and drying. By using the surface sizing agent to papermaking, tensile strength and compression strength of the prepared paper are obviously enhanced, water-resistant and moisture resistant capabilities are largely improved, and the using amount of traditional chemical sizing agents is obviously reduced.
Owner:RISINGSTAR BIOTECH GUANGZHOU

Compound phosphoric polyferric sulfate flocculant and production method thereof

The invention provides a novel inorganic compound phosphoric polyferric sulfate flocculant and a production technology thereof. The flocculant can be used in both water treatment and sewage treatment thereby being multifunctional. The phosphoric polyferric sulfate of the invention takes the by-products generated in titanium pigment production, such as ferrous sulfate, phosphoric acid and the like for producing titanium pigment as raw materials thereby having the characteristics of utilization of waste products, simple components, low cost and the like. The production technology of the invention is convenient, has simple operation and can be carried out at normal temperature and normal pressure. In the production process, no liquid waste, waste gas and waste residue can be generated, and the production technology belongs to the cleaner production technology. The invention can be widely applied in water treatment and sewage treatment. Especially in water treatment, the phosphoric polyferric sulfate flocculant of the invention is added to effectively remove soluble phosphorus and phosphorus in other forms in water as well as algae in algae waste water, lower chemical oxygen demand (COD), total phosphorus (TP), suspended solid (SS), chlorophyll (chl-a) and the like.
Owner:善水(南通)工业技术有限公司

Treatment method of concentrated solution produced from landfill leachate by membrane method

The invention discloses a treatment method of a concentrated solution produced from landfill leachate by a membrane method. The treatment method comprises the following steps of enabling the concentrated solution produced from the landfill leachate by the membrane method to sequentially pass through a composite softening coagulation and sedimentation pond, an ozone oxidation reactor, a hydrolyzing pond and an anaerobic MBR pond, and enabling effluent water from the anaerobic MBR pond to enter a nanofiltratoin system; enabling a permeation solution obtained through treatment of the effluent water in the nanofiltratoin system to be treated by a pressure contact oxidation reactor, and directly discharging the treated permeation solution, or after filtering the treated permeation solution by a multi-medium filter, discharging the filtered permeation solution; mixing a concentrated solution obtained after treatment by the nanofiltratoin system with the landfill leachate so as to obtain a mixed solution; and performing concentration treatment on the mixed solution by a biochemical method, an MBR method and the membrane method so as to obtain a concentrated solution, enabling the concentrated solution to enter the composite softening coagulation and sedimentation pond, and performing subsequent operations. The treatment method disclosed by the invention not only is suitable for treatment of the concentrated solution produced from the landfill leachate by membrane filtration, but also is suitable for treatment of other membrane concentrated solutions containing high concentration of organic compounds which are difficult to degrade.
Owner:江苏环保产业技术研究院股份公司

Advanced treatment process for fermentation antibiotic wastewater

The invention relates to the technical field of wastewater treatment, in particular to an advanced treatment process for fermentation antibiotic wastewater. The advanced treatment process comprises the following steps: the fermentation antibiotic wastewater subjected to biochemical treatment is sent into a coagulation reaction tank, and a coagulant and a coagulant aid are added for a reaction; effluent of the coagulation reaction tank is subjected to precipitation separation treatment in a coagulative precipitation tank, and floc precipitates obtained after precipitation are sent into a sludge thickener; effluent of the coagulative precipitation tank is sent into a catalytic oxidation reaction tank and subjected to a Fenton catalytic oxidation reaction; effluent of the catalytic oxidation reaction tank is sent into a catalytic oxidation precipitation tank for precipitation separation treatment, flocs in the effluent obtained after an oxidation reaction are precipitated in the precipitation tank, and precipitated flocs enter the sludge thickener; effluent of the catalytic oxidation precipitation tank enters a two-membrane process desalter for desalting treatment, and the fermentation antibiotic wastewater treated with the process is high in quality and can meet the requirement for reuse of reclaimed water.
Owner:华夏碧水环保科技股份有限公司

Treating method of ceftazidime mother liquor

The invention discloses a treating method for concentrating and separating ceftazidime mother liquor by using a membrane separation technology. The treating method mainly comprises the following steps: (1) carrying out pretreatment on the ceftazidime mother liquor to be treated, and removing fine suspended matters in the mother liquor; and (2) under the condition that the operation pressure is 0.5 to 4.0MPa, and the temperature is 10 to 80 DEG C, carrying out concentration and separation to a nanofiltration component for the ceftazidime mother liquor after pretreatment, obtaining concentrated liquor with the mass fraction of ceftazidime of more than 10 percent, collecting and then carrying out crystallization treatment; and the obtained permeate is discharged into a sewage treatment station for treatment. The treating method has the advantages of: effectively concentrating the ceftazidime mother liquor, not only recovering effective ingredient in the mother liquor, namely the ceftazidime, ensuring the quality of the ceftazidime, but also reducing the indexes of COD and BOD and the like discharged by the mother liquor, reducing the pollution and energy consumption, and having obvious economical and social benefits. The treating method can be widely applied in occasions needing to concentrate and recover the ceftazidime.
Owner:UNIV OF JINAN

Eutrophicated river water quality purifying method and purifying device thereof

The invention discloses an eutrophicated river water quality purifying method. The method comprises the following steps of: intercepting eutrophicated river into upstream, midstream and downstream parts; then conveying water of the upper part into an electrolyzing machine to be electrolyzed; then, discharging the electrolyzed water into the midstream part to be subjected to aeration treatment at the midstream part; and finally, flowing the water subjected to the aeration treatment to the downstream part. The eutrophicated river water quality purifying method adopts a method for firstly electrolyzing and secondly aerating, and can effectively inhibit the growth of algae in the water and an anaerobic reaction of a water body; an organic matter is decomposed, and total nitrogen, total phosphorus and chromaticity in the water are reduced and the odor is removed, so as to improve the river water quality and recover a water ecological system in a shorter time. The invention further discloses a river water quality purifying device, comprising a rubber dam, a water pump, the electrolyzing machine and an aeration device. The river water quality purifying device can be directly mounted in a river to directly purify river water; and the river does not need to be specially leaded to a pre-set structure to be treated, and the river water quality purifying device nearly does not change an environment, so that the influences to a natural environment are smaller.
Owner:BOYING XIAMEN SCI & TECH

Treatment methods of landfill leachate and treatment systems thereof

The invention belongs to multiple-stage treatment methods of waste water and treatment systems thereof, and particularly discloses treatment methods of landfill leachate and treatment systems thereof. One of the treatment methods comprises the following steps of: firstly, mixing the landfill leachate and anaerobic sludge to perform complete reaction; secondly, performing electrochemical reaction to obtain flocs and initially depositing effluent water; finally, adjusting the pH value, adding Fenton reagents and mixing the effluent water and aerobic sludge after the complete reaction between the Fenton reagents and the leachate in a later phase. In the other method of the invention, the mixing and reaction between the leachate in the initial phase and the aerobic sludge are performed before the electrochemical reaction and other steps are the same. The invention also provides two different treatment systems for the two different treatment methods. The systems are formed by optimally combining a pre-treatment tank, an anaerobi reaction tank, an electrochemical reaction tank, a deposition tank, an oxidation tank, a regulating tank, a biochemical reaction tank and a sludge concentration tank. The treatment methods have the advantages of wide application range, small influence of environment, low operation cost, good treatment effect and the like.
Owner:CHANGSHA HASKY ENVIRONMENTAL PROTECTION TECH DEV CO LTD
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