54results about How to "High COD removal rate" patented technology

The invention discloses a preparing method of an ozone oxidation catalysis catalyst for degrading organic wastewater. The catalyst is a multi-component-loaded catalyst and comprises a catalysis carrier and catalytic active components, wherein the catalytic active components are multi-component metal oxides. The catalyst has high catalysis efficiency and stability in the process of ozone catalysistreatment on the high-chlorine organic wastewater, the active components of the catalyst have a good synergistic effect, the advanced treatment efficiency for the high-chlorine organic wastewater is improved, and meanwhile, the compressive strength of the catalyst is high; after the high-chlorine organic wastewater with the COD of 70-120 mg/L and the chlorine ion content not larger than 8,000 mg/Lis subjected to catalytic treatment, the COD content can reach the national grade-one sewage discharge standard; meanwhile, the preparing method of the catalyst is simple, the load quantity of the active components is precisely controlled, the active components are uniformly dispersed, no waste slags or wastewater is generated in the preparing process, and the preparing method is free of pollution and environmentally friendly.

The invention provides a method for treating polyether polyol wastewater and relates to the technical field of treatment of refractory organic wastewater. The method particularly comprises the following steps of: carrying out high-efficiency catalytic oxidation pretreatment on the polyether polyol wastewater; and entering the polyether polyol wastewater to enter a biochemical stage, wherein the biochemical stage is divided into a biochemical strengthening stage and an aerobic treatment stage. Most dissolved micromolecule organic poisons in the polyether polyol wastewater are removed by high-efficiency catalytic oxidation; the biotoxicity of the polyether polyol wastewater is greatly reduced; a B/C ratio (the B/C ratio is improved to the range of 0.42 to 0.65) of high-efficiency catalytic oxidation pretreatment effluent is obviously improved; the biochemical treatment load is reduced; and the biochemical treatment effluent is ensured stable and is ensured to reach the standard. The treatment method disclosed by the invention has the characteristics that the treatment method is efficient and rapid, has low cost, is safe and reliable, is easy to realize the large-scale industrial application and the like.

The invention relates to the technical field of water treatment, and concretely relates to a catalytic ozonation catalyst as well as a preparation method and application thereof. The preparation method of the catalytic ozonation catalyst comprises the following steps of grinding raw material coal, adding active components, forming, carbonizing and activating to obtain the catalytic ozonation catalyst. The active components are prepared from one or more of a transition metal compound, a rare earth metal compound, an alkali metal compound and an alkaline-earth metal compound. According to the preparation method, an activation reaction mechanism is changed, so that a pore structure of the catalyst is changed, and a double-pore distribution structure with coexistence of mesopores and micropores is prepared; the catalyst has high catalytic activity, and the removal rate of COD (Chemical Oxygen Demand) can be greatly improved; the catalyst is developed in mesopores, larger in pore volume, and beneficial to enabling pollutants to enter pores of the catalyst so as to fully contact with an active center; the micropores exist at the same time, so that the catalytic activity can be effectively improved.

The invention discloses a deep treatment method of high-concentration organic wastewater. The method comprises the following steps: step one, coagulating and precipitating; step two, carrying out ultraviolet-ozone-ultrasound combined reaction stage; step three, carrying out electrolysis treatment through three dimension electrodes; step four, recycling heavy metals; and step five, carrying out ultrafiltration-electrodialysis coupled desalinization. The deep treatment method of high-concentration organic wastewater is free of biological treatment processes, free of pretreatment, high in desalinization rate, simple to operate, high in efficiency, free of secondary pollution and low in cost, and is capable of completely removing organic matters, recycling the heavy metals and recycling the high-concentration organic wastewater.

The invention provides a novel process for pretreating carbendazim wastewater, which relates to a pretreatment technique of carbendazim pesticide production wastewater. The process comprises the following steps: 1, adjusting the pH value of concentrated wastewater to 11 by lye in a neutralization tank; 2, blowing out ammonia in a stripping tower by using compressed air; 3, blowing the ammonia to afalling film recovery tower and an aqua ammonia circulating tower for recycling; 4, feeding the residual wastewater in a wastewater storage tank; 5, feeding the wastewater in an extraction kettle, and extracting the wastewater by hydrochloric acid and extracting agent; 6, separating a solid carbendazim complex by a centrifugal machine; and 7, sending the wastewater to an environment-friendly workshop for a biochemical treatment. The process ensures that the COD removal rate, the ammonia nitrogen removal rate and the wastewater removal rate of the wastewater treatment process are improved greatly.

The invention discloses a high performance flocculant for wastewater treatment. The flocculant comprises the raw material in parts by weight as follows: 30-55 parts of montmorillonite, 35-45 parts of steel slag, 5-7 parts of electrolytic aluminum slag, 45-70 parts of magnesium ore, and 15-25 parts of red mud. The flocculant with the magnesium ore, the red mud, the montmorillonite, the steel slag and the electrolytic aluminum slag prepared by industrial hydrochloric acid contains various flocculating and decoloring effective components such as aluminum, iron and magnesium, so that the flocculant has better decoloring effect on reactive dye, vat dye and acid dye, and specially has better decoloring effect and higher COD (Chemical Oxygen Demand) removal rate to alkaline printing and dyeing wastewater. According to the high performance flocculant for wastewater treatment provided by the invention, waste residue produced by industrial production is adequately utilized to treat waste with waste, so that the high performance flocculant for wastewater treatment has the advantage of wide material source, low cost and good accessibility, low production and use cost, simple processing and preparation, wide range of application, good wastewater treatment effect, treatment of waste by waste and high environment-friendly benefit, and can be used as a flocculant for treating wastewater containing suspended solids.

The invention discloses a novel waste emulsion treatment process. Innocent treatment of waste emulsions can be achieved through the process flows of demulsification and micro-nano air flotation deoiling, MVR evaporation treatment, ozone micro-nano bubble catalyzed oxidation, nano-ferrum mediated ultrasonic catalyzed oxidation, efficient biochemical treatment and deep purified recycling/emission, the treated waste emulsions can be directly discharged or recycled, the treatment effect is efficient and rapid, and the COD removal rate is high; and the process does not have selectivity and can be extensively applicable to treatment on all classes of waste emulsions.

The invention discloses a method for treating dicumyl peroxide condensed wastewater. By taking N-N-di(1-methylheptyl)acetamide as an extracting agent, the method comprises the following steps of: step 1, preparing 5-15% of N-N-di(1-methylheptyl)acetamide to a solvent by cumin as an extracting agent; step 2, mixing the dicumyl peroxide condensed wastewater by acidic wastewater, and adjusting a pH value of the mixed liquid to 1-6; step 3, carrying out three-level or four-level reverse extraction on the mixed liquid so as to obtain extract liquor; step 4, separating the extracted wastewater into a normal pressure distillation tower, condensing and recycling the distillate, and detecting a COD (Chemical Oxygen Demand) value and the phenol content; and step 5, washing the extract liquor by sodium hydroxide solution to obtain the extracting agent for recycling. After the extracting agent system is recycled, the extracting agent is repeatedly used; after the dicumyl peroxide condensed wastewater is subjected to three-level or four-level reverse extraction, the phenol removal rate of the recycled distillate is up to more than 99.5%, and the removal rate of the COD after distillation is high.

The invention relates to a preparing method of a composite coagulant used for treating printing and dyeing waste water.The method comprises the steps that an industrial by-product waste hydrochloric acid and aluminum profile industry aluminum-containing waste residues are added into a reaction kettle sequentially, stirring is carried out in a heat-preserving mode at normal pressure, and aluminum residue water with AlCl3 as an effective ingredient is obtained; a liquid heavy metal capture agent is put into the aluminum residue water, stirring is carried out, and plate-frame pressure filtration is carried out to obtain faint yellow clear aluminum-containing liquid; industrial-grade CaCl2 is put into the aluminum-containing liquid, and stirring is carried out; the stirring reaction is carried out in a heat-preserving mode at the normal pressure, and supernatant liquid subjected to natural sedimentation is the liquid composite coagulant.The preparing method has the advantages that the preparation technology of the composite coagulant is simple, the raw materials are wide in source, and cost is low; the product performance is stable, the added amount of chemical is small, floc is compact, and the sedimentation speed is high; the composite coagulant has good decoloration performance and a high COD removal rate, and the actual printing and dyeing waste water chroma removing rate and the COD removal rate can be 10-15% higher than those of PAC sold in the market.

The invention relates to a preparation method of a polyaluminium sulfate zinc composite flocculant, and belongs to the field of synthesis of flocculants for environmental protection engineering. The preparation method of the polyaluminium sulfate zinc composite flocculant comprises the following steps: respectively preparing aluminium salt and zinc salt into solutions with certain concentrations at a room temperature, mixing according to a certain zinc-aluminium mass percent, slowly dropwise adding a pH conditioning agent solution with a certain concentration on a magnetic heating stirrer, stirring for 15-30 minutes so as to obtain a stable clear colorless polyaluminium sulfate zinc composite flocculant, and drying at 50 DEG C, thus obtaining hypocrystalline white solids. The polyaluminium sulfate zinc composite flocculant has the advantages of low dosage, large and dense alumen ustum, fast settling velocity and few aluminium metal ion residues and can stabilize for one year. The polyaluminium sulfate zinc composite flocculant prepared by the method can be used for treating drinking water, raw water and wastewater and has no toxic or side effect. The preparation method of the polyaluminium sulfate zinc composite flocculant has the advantages of simple production process, simple production equipment, low production cost, good flocculation effect, low investment cost and the like.

The invention discloses a sewage treatment system using LNG cold energy. The system uses the LNG cold energy to directly and/or indirectly treat sewage; the indirect treatment mode is characterized inthat impurities are removed from the sewage through supercritical carbon dioxide extraction, and the corresponding system comprises a supercritical carbon dioxide sewage treatment device (12), an extract separator (13), an air separation system (9) and an oxygen-rich combustion system (10); and the direct treatment mode is characterized in that the sewage is treated through a freezing process, and the corresponding system comprises a freezing process sewage treatment device (4). The structure, the arrangement mode and the corresponding cold energy utilization mode of the key assemblies of thesystem are improved, the problem of limited sewage treatment using natural cold energy in the prior art is effectively solved, and the sewage treatment system also can be used together with an oxygen-rich combustion assembly, and has the advantages of full utilization of the LNG cold energy, realization of zero discharge of carbon, and good environmental protection effect.

The invention provides a production technology of a high-stability magnesium-ferrous composite flocculating agent. The flocculating agent comprises 100 weight parts of brine, 5 to 20 weight parts of industrial grade ferrous sulfate heptahydrate, and 0.2 to 5 weight parts of hydrochloric acid. The production technology comprises the following steps of: putting the industrial grade ferrous sulfate heptahydrate into an anticorrosive tank, and adding the industrial hydrochloric acid which is diluted by 2 to 5 times through the brine for complexing and curing; slowly adding the brine into the cured solution with stirring; regulating the pH value of the solution to be between 1 and 3 by using a salt or a weakly alkaline substance; putting micro iron powder which attracts a magnet and is used as a stabilizer into the solution, performing reduction reaction, and quickly regulating the proportion of divalent iron to trivalent iron; and sealing and preserving the solution. The flocculating agent is high in stability, and can overcome the defects that the solution is foamed and overflows a reactor when the iron powder is added for oxidation resistance and the residue blocks a conveying pipeline in the prior art.

The invention discloses a Fenton oxidation treatment method for wastewater. The addition of hydrogen peroxide and ferrous sulphate can be determined to remove COD in wastewater according to the COD ofthe wastewater. The advantages of the method are as follows: the removing rate of the COD in the wastewater can reach more than 80% by determining the addition of the hydrogen peroxide and the ferrous sulphate according to the COD of the wastewater, so that high removing rate of the COD of the wastewater can be achieved; and the method is low in hydrogen peroxide and ferrous sulphate price, abundant in source and low wastewater treatment cost.

The invention provides a catalyst and a preparation method thereof, and the method comprises the following steps: providing an organic polymer solution, and dipping a carrier into the organic polymersolution so that an organic polymer is loaded on the carrier; functionalizing the organic polymer loaded on the carrier by using a complexing agent to obtain a first precursor; preparing a transitionmetal-rare earth mixed solution, and soaking the first precursor in the mixed solution to obtain a second precursor; and drying and roasting the second precursor to obtain the catalyst. Through the concept, according to the invention, the organic polymer and the complexing agent are introduced, so that an organic polymer metal complex is formed in the preparation process of the catalyst; accordingto the preparation method, a part of transition metal ions are embedded into the crystal structure of the rare earth oxide in the roasting process to form a solid solution, so that the influence of the surface tension and solvation effect of the impregnation liquid on the dispersion of the active component is overcome, the dispersity of the active component on the carrier is improved, and the catalytic performance of the catalyst is improved.

The invention discloses a treatment system and a treatment method for antibiotic fermented wastewater. The system comprises a coagulation reaction pond, a first settling pond, a first neutralization pond, an anaerobic pool, an aerobic pond, a second settling pond, an acid adjusting pond, a Fenton reaction pond, a second neutralization pond, a third settling pond and an oxidizing pond which are connected, wherein stirrers are arranged in the first neutralization pond, the second neutralization pond and the Fenton reaction pond; a first coagulation stirring device is arranged in the coagulation reaction pond; and suspended carriers are arranged in the anaerobic pool and the aerobic pond, and the aerobic pond is connected to an aerating device. The system and method disclosed by the invention can effectively reduce COD in pharmaceutical wastewater, improves the biodegradability of a wastewater effluent, and is good in wastewater treatment effect; and the equipment is good in impact resisting effect, can be suitable for relatively large water fluctuation generated by the pharmaceutical wastewater, and is long in service life.

The invention discloses a nano ferroferric oxide loaded activated carbon carrier, a preparation method and application thereof in Fenton fluidized bed treatment, and belongs to the field of preparation and application of composite materials. Polymeric aluminum chloride forms micelle in a solution, nano ferroferric oxide particles are polymerized on the surface of granular activated carbon, the carrier is applied to a Fenton fluidized bed, generated Fe3+ can be crystallized and attached to the surface of the carrier, firm Fe(OOH) crystals are formed, therefore the amount of generated iron mud can be greatly reduced, meanwhile, the biodegradability of the wastewater is improved, and the COD (Chemical Oxygen Demand) removal rate and the residual antibiotic degradation rate of the wastewater are obviously improved.

The invention discloses a novel sewage treatment composite flocculant which is synthesized by compounding oxide with chitosan. The oxide comprises a Fe2O3 base and TiO2-IrO2 active sites, wherein theTiO2-IrO2 active sites are distributed on the surface of the Fe2O3 base and in pores of the Fe2O3 base. Compared with an existing chitosan flocculant, the prepared flocculant has the advantages that COD (chemical oxygen demand) removal rate, turbidity removal rate and Pb<2+> concentration reduction rate are remarkably increased, settling time is shortened as compared with that of the chitosan flocculant, and sewage purification effects are remarkably optimized.

A biological microbial agent for removing COD of industrial sewage consists of Bacillus megaterium, Pseudomonas citronellolis, yeast, a nutrient accounting for 12% of the weight of the total solution,and water. The content of Bacillus megaterium is 5000/ml; the content of Pseudomonas citronellolis is 1100 /ml; and the content of yeast is 250 /ml. The beneficial effects of the invention are as follows: the biological microbial agent of the invention belongs to the compound bacterial population, can quickly start, repair and strengthen a biochemical system of a sewage treatment system and effectively improve the COD removal rate of a sewage treatment device, and has obvious effects of sewage treatment and bioremediation.

A chemical engineering wastewater treatment device is disclosed and relates to the technical field of wastewater treatment. The device includes a water feeding tank, a microelectrolysis tank, an ozoneoxidation tank and a neutralization tank which are connected in order through a pipeline. The water feeding tank includes a water storage case used for storing wastewater and a water feeding case below the water storage case. The bottom of the water storage case is in the water feeding case and is provided with a water inlet provided with a baffle plate. A drive mechanism is disposed in the waterfeeding case. The water feeding tank is connected to the microelectrolysis treatment tank through the pipeline. A microelectrolysis filler is disposed in the microelectrolysis tank. An ozone generator is disposed in the ozone oxidation tank. An output end of the ozone generator is connected to a micropore diffuser. A pH sensor and a pH adjuster are disposed in the neutralization tank. A large amount of wastewater is continuously treated repeatedly, wastewater treatment quality in each time is ensured, and treated wastewater can completely meet the emission standard.

The invention relates to a modified polyurethane hollow fiber membrane for industrial water treatment. The membrane comprises a water inlet surface layer and a water outlet surface layer. The water inlet surface layer comprises the following raw materials: polycarbonate type polyurethane resin, chloroprene, aminopropyltriethoxysilane, polyurethane, triethanolamine, dibutyl phthalate, glass fibre, polyoxyethylene fatty acid, and dodecylbenzene sulphonic acid. The water outlet surface layer comprises the following raw materials: polycarbonate type polyurethane resin, hydroxypropyl methyl cellulose, maleate, hydroxyl terminated thermoplastic polyester, montmorillonite, polyethylene glycol, triisopropanolamine, polyethylene glycol dilaurate, and ethylene glycol monobutyl ether acetate. The modified polyurethane hollow fiber membrane for industrial water treatment improves retention rate for macro-molecule organic matters, changes electrostatic interaction on surface of the membrane, prevents adsorption of pollutants on the surface of the membrane, increases micropore quantity of the membrane and connectivity, and improves elasticity of the membrane; the membrane with high elasticity is suitable for impact of high water flow.