314results about How to "High removal rate" patented technology

The invention discloses an application of a metal-organic framework functional material, and belongs to the technical field of water processing. A metal-organic framework material is subjected to pre-modification and post-modification, and a series of different functional groups are introduced to an organic ligand or an inorganic metal cluster of the material. The metal-organic framework functional material is used as an adsorbent for removing radioactive ions from nuclear waste. The metal-organic framework material containing sulfate radicals and sulfonate radicals has a preferable adsorption effect on 133Ba<2+>; the maximum removal rate can reach 99.9%; and adsorption equilibrium can be achieved in 5min. By using the functionalized metal-organic framework material, a simple, easy, efficient, and fast novel method is provided for removing 133Ba<2+> from the nuclear waste. The metal-organic framework functional material has significant industrial application value with respect to nuclear pollution management.

A chemical mechanical polishing slurry composition and method for using the slurry composition for polishing copper, barrier material and dielectric material that comprises first and second-step slurries. The first-step slurry has a high removal rate on copper and a low removal rate on barrier material. The second-step slurry has a high removal rate on barrier material and a low removal rate on copper and dielectric material. The first slurry comprises at least an organic polymeric abrasive.

The nitrobacteria culture promoter consists of molasses 100 weight portions, manganese salt 0.2-3.0 weight portions and adsorbent 1-8 weight portions. The manganese salt includes is sulfate or hydrochloride. The adsorbent is zeolite powder, diatomite, powdered active carbon, fly ash or their mixture. The nitrobacteria culture promoter is used in biological nitrification process of eliminating ammonia nitrogen and thrown into sewage directly to promote the propagation and growth of nitrobacteria in sewage. Through combination with sewage temperature regulation, dissolving oxygen, regulating pH, etc, the nitrification may be completed in short period. It has raised ammonia nitrogen eliminating rate and low cost.

Method for purifying a liquid medium, including adsorbing the impurities contained in the liquid medium using a sorbent, separation and removal of the adsorbed impurities, and regeneration of the sorbent, wherein the impurities arc oxidized by mixing the liquid medium with an oxidant using a particulate catalyst impregnated sorbent, the oxides of the impurities are adsorbed, and are separated and removed by washing the particulate catalyst impregnated sorbent with a polar solvent, and the sorbent is regenerated by direct heating or by blowing through with a hot gas.

The invention discloses a disposing method of ammonia nitrogen waste water in the effluent disposal technological domain, which is characterized by the following: sieving heterotrophic nitrobacteria and aerobic denitrobacteria with stronger environment adaptive ability to nitrate and denitrate simultaneously; constructing mud nitrated and denitrated system to dispose waste water with nitrogen simultaneously to satisfy different DO densities.

The invention discloses a method for ultrasonically repairing heavy metal contaminated soil. The method comprises at least following steps: preparation of an extracting agent- citric acid solution; mixing of an extracting agent and polluted soil; mechanical oscillation extraction or ultrasonic-assisted extraction for soil; centrifugal separation and filtration of soil after extraction. According to the method, citric acid is selected as the extracting agent, so that the cost is relatively lower, influence on basic physicochemical property of soil is smaller, secondary pollution cannot be caused, the citric acid is an environment-friendly extracting agent, and four heavy metals including cadmium, copper, lead and zinc in the soil can be effectively removed when the extracting agent and ultrasonic waves are jointly applied to repairing of the heavy metal contaminated soil. The method has the characteristics of good removal effect, small extracting agent dosage and short repairing time.

A method of selectively removing silicon nitride from a substrate comprises providing a substrate having silicon nitride on a surface thereof; and dispensing phosphoric acid and sulfuric acid onto the surface of the substrate as a mixed acid liquid stream at a temperature greater than about 150° C. In this method, water is added to a liquid solution of the mixed acid liquid stream as or after the liquid solution of the mixed acid liquid stream passes through a nozzle.

The invention discloses a treatment method for surfactant-containing wastewater. The treatment method comprises the following steps: collecting the surfactant-containing wastewater, and carrying out detection; adding proper adsorbing material particles, and allowing the adsorbing material particles to adsorb the surfactant; and through a foam flotation process, allowing the surface of a liquid togenerate a large number of bubbles by utilization of a bubbling device, allowing the adsorbing material particles attached with a target surfactant to float with the bubbles, and removing surface foamthrough foam separation so as to achieve the purpose of reducing the concentration of the surfactant in a water body. The treatment process provided by the invention has the advantages of simple device, simple and convenient operation, cheap and easily-available used materials, low cost, good treatment effect, etc.

The invention discloses a method for preparing wrapped nanometer zero-valent iron with modified graphene oxide as a carrier. The method comprises the following steps that firstly, wrapped nanometer zero-valent iron is prepared; secondly, graphene oxide is modified; thirdly, the obtained modified graphene oxide is added to water, graphene oxide suspension liquid is obtained after ultrasonic dispersion is conducted for one to three hours, then the obtained wrapped nanometer zero-valent iron is added to the graphene oxide suspension liquid, filtering, washing and drying are conducted after stirring is conducted sufficiently, and then the wrapped nanometer zero-valent iron adsorbent with the modified graphene oxide as the carrier is obtained. According to the method, cheap and harmless tea polyphenol, agar and water soluble starch are taken as the surface modifier to prepare the wrapped nanometer zero-valent iron, and the target pollutant removal rate is increased; the surface of the graphene oxide is modified by means of covalent bonds, the maximum Cr6+ absorption capacity of the modified graphene oxide is 390 mg/g, and the absorption capacity is greatly improved by one to two times.

The invention discloses a method for reducing heavy metal cadmium in rice by utilizing mixed fermentation of lactobacillus and saccharomycetes. The method comprises the following steps of crushing and sieving a rice sample with the cadmium content exceeding the standard (0.2mg/kg above), adding deionized water, charging mixed fermentation bacterium suspension of lactobacillus plantarum, brewer's yeast and lactobacillus acidophilus, stewing and fermenting at constant temperature, washing and centrifugally dehydrating the fermented rice flour, removing the fractionated heavy metal cadmium ion in rice, then drying the centrifuged wet rice flour residues so as to obtain the rice flour with reduced heavy metal cadmium. By adopting the method, the reduction rate of heavy metal cadmium in the rice sample reaches 85% above; drying the dehydrated rice flour for acting as a feed or for producing fermented rice flour. According to the invention, not only can the content of heavy metal cadmium in rice be reduced effectively, but also the utilization issue of rice with cadmium exceeding the standard is solved effectively.

The invention relates to an enzyme treatment technique of difficult degradation organic sewage, belonging to the sewage treatment technical field. Coupling of an enzyme-reduction cocatalyst is employed at appropriate temperature and pH value, thereby catalyzing oxygen to generate superoxide radical and hydroxyl radical with extremely strong oxidation capacity, so as to remove organism from water. When the sewage is treated by the coupling of the enzyme-reduction cocatalyst, no peroxide is added; and air or oxygen is continuously led in, so as to generate hydroxyl radical with higher oxidation-reduction potential. The enzyme treatment technique is applicable to treatment of difficult degradation organic pollutant other than phenol and aniline in the sewage; in addition, the enzyme treatment technique has high removing efficiency and low treatment cost.

The invention provides a method and device for processing exhaust gas containing high-concentration organic pollutant. A combustion chamber of an integrated RTO (Regenerative Thermo Oxidation) device is modified into two integrated or split type combustion chamber devices, and high temperature exhaust gas in one combustion chamber is led out, and with the combination of an external waste heat recovery device of the combustion chamber, waste heat recovery (capable of recovering superheated steam, saturated steam or hot water) and utilization of redundant heat energy of a second high temperature combustion chamber are achieved; moreover, if an ammonia gas replenishing device is additionally arranged at an exhaust gas inlet, with the combination of the SNCR (Selective Non-Catalytic Reduction) technology, the purpose of purifying NOx pollutants to N2 and H2O can be achieved. Under the premise of keeping the advantages (high heat efficiency, high removal rate, low investment and small occupied area) of the traditional RTO technology, the technology limitation that the traditional RTO technology only can be used for processing low concentration volatile organic pollutant exhaust gas can be overcome.

The present invention relates to aqueous slurry/solution compositions for the Chemical Mechanical Polishing/Planarization (“CMP”) of substrates. In particular, the novel slurries/solutions of the present invention contain a multifunctional activator which provides increased copper removal rate to the aqueous polishing slurry/solution while suppressing isotropic chemical etch and dishing of copper lines.

The sequencing batch active sludge process for eliminating ammonia nitrogen from sewage includes the following steps: 1. settling sewage to eliminate solid impurity, making sewage enter to reaction pond with active sludge, and throwing nitrobacteria culture promoter comprising molasses 100 weight portions, metal salt 0.2-2.5 weight portions and adsorbent 1-8 weight portions, with the metal salt including component A of FeSO4 or FeCl2, and component B of MgSO4 and/or CaCl2, in the molar ratio of 10 to (0.5-5), the adsorbent being zeolite powder, diatomite, powdered active carbon, fly ash or their mixture, the sludge load being 0.05-0.3 kgBOD5/kg.MLVSS, and the nitrobacteria culture promoter throwing amount being 5-20 mg/l; 2. aerobic nitrification reaction at dissolved oxygen concentration of 2-8 mg/l for 3-6 hr; 3. anaerobic nitrification reaction for 2-4 hr; and 4.letting sewage standing to settle sludge and exhausting supernatant.

The invention relates to an application of palygorskite clay serving as an adsorbent in treatment of picric acid waste water, belonging to the technical field of wastewater treatment. The palygorskite clay serving as the adsorbent can be powder obtained after the palygorskite clay raw ore is crushed directly, purified palygorskite clay or palygorskite clay physically modified by utilizing acid treatment or thermal treatment or chemically modified by utilizing a surface active agent or coupling agent. The adsorption test proves that all types of palygorskite clay can favorably adsorb the picric acid in an aqueous phase with low adding amount and low cost. The wastewater treatment result fully meets the requirement of the Detection and Analysis Methods of Water and Wastewater (Fourth Edition) and GB8978-1996. Therefore, palygorskite clay has bright application prospect.

The invention provides a method for treating acid uranium-bearing wastewater by utilizing modified chitosan adsorbents. Aimed at problems of complicated process, high operation cost and raw material cost and the like of uranium-bearing wastewater treatment in the uranium ore metallurgy process, the modified chitosan adsorbents are utilized for treating the acid uranium-bearing wastewater. The modified chitosan adsorbents include one or more of triethylene tetramine, ethidene diamine, diethylene triamine or tetraethylene pentamine modified chitosan adsorbents. The research shows that the modified chitosan adsorbents have good absorption effects on uranium and a high removing rate for uranium in low-concentration uranium-bearing wastewater, and the removing rate is larger than 95%.

The invention belongs to the field of treatment of wastewater in food enterprises and in particular relates to a treating agent of wastewater in monosodium glutamate production enterprises and also relates to a monosodium glutamate production wastewater treatment method. The monosodium glutamate production wastewater treating agent comprises the following components in parts by weight: a physical water purifying agent, a compound microbial agent and an enzymic preparation, wherein the physical water purifying agent comprises 1-5 parts of activated carbon, 1-5 parts of organically modified zeolite and 1-5 parts of polyacrylamide; the compound microbial agent comprises 0.02-0.1 part of konjac acidovorax powder, 0.05-0.2 part of arthrobacter powder, 0.05-0.2 part of bacillus laterosporus powder and 0.04-0.2 part of moraxella powder; and the enzymic preparation comprises 0.05-0.1 part of xylanase, 0.04-0.09 part of glutaminase and 0.01-0.06 part of acid proteinase. By adopting the wastewater treating agent and the wastewater treatment method, complex large-particle organic matters difficult to degrade are hydrolyzed into simple organic matters easy to degrade, thus greatly reducing the content of SS (suspended substance) in the wastewater, and the treated wastewater has high BOD (biochemical oxygen demand) and COD (chemical oxygen demand) removal rates and reaches the specified discharge standard.

The invention relates to a directly oxidizing refining and purifying method for industrial silicon melt, which comprises the following steps: adding melt state industrial silicon into a graphite crucible of a heating converting furnace through a pouring box, keeping the temperature of the silicon melt between 1450 and 1600 DEG C by adopting the intermediate sensing heating way, blowing the gas-solid mixture of compressed air and SiO2-CaO slag oxidant powder into the silicon melt to be oxidized and refined, removing most part of metallic impurity Al, Ca, Ti and the like and a small amount of impurity element B; and then closing the compressed air, blowing oxidized gas H2O steam, removing the residual metallic impurity and non-metallic impurity B; and finally, blowing H2 to remove the impurity element P in silicon. The invention achieves the purposes of reducing metallic impurity in the silicon to be less than 1.0 ppmw, reducing the non-metallic impurities B and P respectively to be less than 0.2 ppmw and 0.5 ppmw, and increasing the t electric resistivity to be larger than 2.5 Omega*cm.

The invention discloses a waste water treatment process which comprises the following steps that 1) waste water enters a primary sedimentation tank through a grid to remove suspended matters; 2) the waste water overflows from the primary sedimentation tank into a regulating tank after the suspended matters are removed, and lime milk is added to adjust the pH value of the waste water to be neutral; 3) the waste water of which the pH value is adjusted to be neutral naturally flows into a neutral aeration tank and is mixed with compressed air in the aeration tank, and Fe<2+> in the waste water is converted to Fe<3+>; 4) the waste water in the aeration tank is injected to a flocculation reaction tank, polyacrylamide flocculant is added to the waste water, and then the waste water is pumped to an inclined tube sedimentation tank; and 5) supernate of the waste water in the inclined tube sedimentation tank overflows into a contact oxidation tank and is mixed with the compressed air filled into the contact oxidation tank, organic matters in the waste water are subjected to oxygenolysis, and the waste water in the contact oxidation tank is deposited through a sedimentation tank and then overflows into a clean water tank. After being treated by the waste water treatment process, the waste water can reach the standard of Integrated Waste Water Discharge Standard (GB 8978-1996); and in addition, the operating cost of a waste water treatment system is lower, and the waste water treatment volume is large .

The invention discloses an air filter material containing active carbon and a production method thereof. The filter material is at least composed of an upper non-woven fabric layer, a lower non-woven fabric layer and an intermediate sandwiched active carbon layer, wherein the active carbon layer contains more than 5 wt% of active carbon particles treated by acidic and/or alkali substances. The air filter material containing active carbon in the invention has a high removal rate in removal of acidic and alkaline gas and composite gas thereof, maintains good removal efficiency in removal of organic gas at the same time and can be used in filtration fields like automobiles, household purifiers, clean rooms, etc.

The invention provides a method for producing chloride-based compound fertilizer and co-producing gypsum through decomposing phosphorite with hydrochloric acid, belonging to the technical field of compound fertilizer production. The method comprises the following steps: after the phosphorite is decomposed by using the hydrochloric acid, filtering and removing acid-insoluble substances and organic suspended matters; adding industrial ammonium sulfate in the purified acidolysis solution for decalcification; filtering so as to obtain the decalcified byproduct high-purity gypsum; and producing a nitrate-and-chloride-based compound fertilizer by using the decalcified acidolysis solution. After the phosphorite is decomposed, the calcium in the acidolysis solution generated is removed by using the ammonium sulfate, and other impurity ions are not added; and as a nutrient, the ammonia in the ammonium sulfate is remained in a finished product when the calcium is removed by using the ammonium sulfate. The removal rate of the calcium in the acidolysis solution is up to above 95%.

The invention discloses a composite microbial preparation capable of efficiently degrading organic waste and application thereof. The composite microbial preparation contains white-rot fungus, penicillium diversum, pseudomonas putida, alcaligenes faecalis, bacillus subtilis and bacillus thuringlensis, wherein the bacterial count of the white-rot fungus accounts for 20-40% of the total bacterial count of the composite microbial preparation, the bacterial count of the penicillium diversum accounts for 5-15% of the total bacterial count, the bacterial count of the pseudomonas putida accounts for 10-20% of the total bacterial count, the bacterial count of the alcaligenes faecalis accounts for 5-15% of the total bacterial count, the bacterial count of the bacillus subtilis accounts for 10-20% of the total bacterial count, and the bacterial count of the bacillus thuringlensis accounts for 10-20% of the total bacterial count. The invention also provides the application of the composite preparation in sewage treatment. The composite microbial preparation has the advantages of being capable of rapidly decomposing organic waste, effectively inhibiting the growth of harmful microbes, enabling suspended matters in sewage to flocculate, reducing aeration rate, effectively improving sewage chromaticity and turbidity, eliminating stink and reducing sludge discharge.

The invention relates to a method for reducing ammonium content in paper-making reconstituted tobacco, belongs to the technical field of the paper-making reconstituted tobacco and is an improvement of an existing method for producing paper-making reconstituted tobacco. The improvement refers to that an electrodialysis ammonium removing process composed of a tobacco raw material extracting solution pretreating procedure and an electrodialysis ammonium removing procedure is added after a tobacco raw material solid-liquid separation process and before a process of concentrating extracting solution to prepare a coating material, wherein a, the tobacco raw material extracting solution pretreating procedure includes that insoluble solids with granular size larger than 200nm and colloidal substances in an extracting solution are removed by a ceramic membrane microfiltration technology; b, the electrodialysis ammonium removing procedure is finished in an electrodialysis device with a conductivity meter, and a working curve about correlation between a conductivity drop rate and ammonium removing amount after ammonium is removed by light-room raw materials is utilized to control the ammonium removing amount. The method for reducing the ammonium content in the paper-making reconstituted tobacco has the advantages that ammonium ion removing rate is high in the tobacco raw material extracting solution, raw material loss is less, ammonium ion content is convenient to control, cost is low, and an application value is high.

An oscillating blade for use with an oscillating tool comprises a base having a predetermined shape and thickness. The oscillating blade also comprises a cutting edge located on a predetermined portion of the circumferential edge of the base. An abrasive coating layer encapsulates the cutting edge and a predetermined wave form is incorporated into the cutting edge. This may allow for the oscillating blade to more efficiently and quickly remove mortar or grout from in between joints of tile, brick, or the like.

This invention provides a Mg rare earth alloy refinery fusing agent and its production method, the sphere of which mass percentage ratio of its chemical components is : 20-40% CaCl, 10-25% KCl, 10-25% NaCl, 15-25% BaCl, 2-5% CaF 3-10% sodium and 3-10% active rare compound which can be: rare earth chloride, rare earth fluoride or rare earth carbonate. This invention regulates the proportion of Cl and F salts and add the slagging constituent sodium and active rare compound, so the fusing agent has a good fusing point, viscosity and humectants and greatly increase its slag eliminating ability.

The invention publishes a multistage absorbent preparation of the organic wastewater which is high potency and difficult to degrade, and its application method. The preparation method is as follows: 1) at 100 to 200deg.c., under the oxygen deficit condition, the nature biomass is carbonized for 2 to 6 hours, forming the primary absorbent with the part carbonizes; 2) inputting the primary absorbent of the part carbonized in the high potency organic wastewater, the quality volume ratio of the absorbent and the highly concentrated organic wastewater is 1:500 to 1:10000, after the agitation, removeing the organic pollutant which is at the high potency and difficult to degrade in the waste water; after the precipitation, recycling the primary absorbent of the part carbonize which adsorbs the organic pollutant, after drying, under 400 to 700deg.c. carrying on the further carbonize for 2 to 6 hours, preparing the secondary absorbent. The assignment action mechanism pretreats the organic wastewater which has the high potency and difficult to degrade;and simultaneously uses the strong surface adsorption mechanism of the secondary absorbent which is carbonized completely, the multistage absorbent is suitable to the adsorption treatment in polar and non-polar organic wastewater, and especially suitable to the adsorption treatment of high density organic wastewater in agricultural chemicals waste water, coked waste water and printing waste water and so on.

The invention discloses a sewage treatment agent which comprises the following components in parts by weight: 20-60 parts of polyacrylamide, 10-30 parts of organic amine, 10-20 parts of sodium hypochlorite, 2-10 parts of a composite antisludging agent, 1-8 parts of an inorganic corrosion inhibitor and 1-10 parts of acetic acid. Compared with the prior art, the sewage treatment agent has the benefits that the formula comprises a flocculant, an adsorbent, a sterilizing agent, the antisludging agent, the corrosion inhibitor and a disincrustant, so that the water is comprehensively treated. The sewage treatment agent has the advantages that (1) the treatment scope is wide and the removal rate is remarkably increased; (2) the treatment effect is excellent, and the removal rate of suspended solids is up to be more than 90%; (3) the dewatering of the sludge is easy, a flocculating constituent is dense and is settled rapidly because of the used unique material, and the produced sludge is dewatered easily; (4) the cost of the materials is low, the sources of the materials are wide, the amount of the material used is low, and the advantage of low cost is achieved; (5) the sewage treatment agent is non-toxic, harmless, and easy to store.

The invention relates to a regeneration method of waste sulfuric acid, in particular to a regeneration method of alkylated waste sulfuric acid. Waste sulfuric acid is in contact with hydrogen peroxide under redox conditions; organic matters or tiny carbon granules in the waste sulfuric acid react with hydrogen peroxide and are translated into carbon dioxide, nitrogen and water; and steam-stripping removing is performed, so as to obtain regenerated sulfuric acid. The regeneration method of alkylated waste sulfuric acid has the advantages that the required reaction temperature is comparatively low, the operation is simple, and the maintenance cost of a device is low.

The invention belongs to the technical field of catalysts and discloses a method for preparing special automobile exhaust purification photocatalysis coating for tunnels. The method includes: taking nano titanium oxide which is a photocatalytic material as a matrix material, taking ferric nitrate as a modifying agent, preparing iron ion doped nano titanium oxide particles by a sol-gel process, adding the prepared nano titanium oxide particles into a coating base material, well mixing, and adding a flatting agent and a thickening agent to obtain the special automobile exhaust purification photocatalysis coating for the tunnels. According to examples, the special automobile exhaust purification photocatalysis coating for the tunnels not only guarantees driving safety due to harmlessness to the environment and human bodies but also is remarkable in removal efficiency, and the removal rate of harmful emissions in automobile exhaust in the tunnels is higher than 85%.

The invention discloses a method for pretreatment and recovery of ammonia nitrogen in acrylic fiber wastewater, which uses struvite to remove ammonia nitrogen in the wastewater produced in the dimethylacetamide (DMCA) production section of the wet acrylic fiber production process, including struvite Steps for generating fecal lite crystallization, struvite pyrolysis regeneration and ammonia nitrogen recovery steps, recycling steps after regeneration, etc. It has the characteristics of simple process, convenient operation, no influence of climate, high ammonia nitrogen removal rate, and can recover ammonia nitrogen resources, and the generated struvite can be used as fertilizer, which has good social and economic benefits.