65results about How to "Improve B/C ratio" patented technology

The invention discloses a pretreatment method for oil-containing waste liquid from machining. The method comprises the following steps: firstly, oil-containing waste liquid from machining passes a grating, in order to remove pollutants of large particles; the waste liquid passes a homogenizing and adjusting pot in order to realize three-phase separation of oil, water and sand; two-stage demulsification is carried out for separated water phase in order to destroy an emulsion, and solid-liquid separation is carried out; supernatant is separated after demulsification, the pH value is adjusted, and fenton oxidation is carried out; after the fenton reaction ends, the pH value is adjusted for deposition, and effluent enters a biochemical system. The oil-containing waste liquid with high COD from machining is directly subjected to simple two-stage demulsification and the fenton oxidation process, COD content is greatly reduced, turbidity is obviously reduced, B / C ratio is obviously increased, and biochemical treatment conditions are created. The method has the advantages of very low treatment cost, and simple operation without secondary pollution.

The invention discloses a multi-core composite carbon source for strengthening nitrogen removal during sewage treatment. A preparation method of the multi-core composite carbon source includes: addingstarch into hot water of 70-100 DEG C, and stirring to enable starch liquid to be fully gelatinized; adding a starch hydrolysis catalyst and acetic acid while stirring, hydrolyzing at 80-100 DEG C for 1-2h, and adding alkali until pH value of a solution is 5.5-7.0; adding microbial prebiotic factor, vitamin and mineral, stirring well, filtering, and decoloring to obtain the multi-core composite carbon source. The multi-core composite carbon source is rich in various carbon sources needed by different microbial flora for metabolism, and weakening of flora diversifying in environment with a single carbon source is avoided; the multi-core composite carbon source is rich in microbial prebiotic factors like various trace elements, organic acid and natural biological hormone, so that microbialactivity of a biochemical system is improved while carbon source supplement is realized, flora diversity is enhanced, and a carbon source which is more efficient is provided for denitrification.

The invention relates to a catalyst for ozone oxidation of organic matters and a preparation method of the catalyst. The catalyst is prepared by the following steps: mixing multi-metal oxide, activated carbon, bentonite, a metal oxide adhesive and an activated carbon adhesive, wherein mass ratio of the multi-metal oxide to the activated carbon to the bentonite is 1:(0.2-5): (0.2-0.5), the mass of the metal oxide adhesive added during the mixing is 0.2%-5% of total mass of the multi-metal oxide, and the mass of the activated carbon adhesive is 0.2%-5% of the total mass of the catalyst; and after the mixing, carrying out mechanical granulation, drying particles, and carrying out microwave radiation, so as to obtain the finished product. The catalyst has the beneficial effects that by utilizing an ozone oxidation process of the organic matters, the ozone oxidation efficiency of the organic matters can be improved; and when the catalyst is applied to wastewater treatment, the wastewater COD removal efficiency of ozone is generally more than 45%, meanwhile, the B / C ratio of the wastewater can be increased, the decolorization ratio of the wastewater can be increased, and the service life of the catalyst is generally more than 5 years.

The invention relates to a pretreatment device and method for treating high-concentration chemical wastewater. The pretreatment device comprises an adjusting tank, a first-stage coagulation reaction tank, a primary sedimentation tank, a sand filter, a first-stage ozone oxidation tank, an electro-catalysis reactor, a second-stage ozone oxidation tank, a second-stage coagulation reaction tank and a secondary sedimentation tank, wherein the adjusting tank, the first-stage coagulation reaction tank, the primary sedimentation tank, the sand filter, the first-stage ozone oxidation tank, the electro-catalysis reactor, the second-stage ozone oxidation tank, the second-stage coagulation reaction tank and the secondary sedimentation tank are connected with one another in sequence to form an integrated treatment device. The pretreatment device and method for treating high-concentration chemical wastewater, provided by the invention, combine the advantages of various coagulation, filtration, oxidation and electro-catalysis reduction, and the wastewater treated by the device can ensure that the chroma and CODcr of the wastewater can be effectively degraded and the B / C ratio and the biochemical property are improved, so that the device and the method have the advantages of being low in treatment cost, simple in operation and easy to control.

The invention relates to a technology for processing wastewater generated in lincomycin antibiotic production. Acidic anaerobic bacteria can degrade biologically degradation-resistant polymer organicsubstances into biologically degradable micromolecular organic substances; the B / C ratio of wastewater can be increased to 0.26-0.30; aerobic bacteria can degrade biologically degradable micromolecular organic substances in wastewater into inorganic substances such as CO2, H2O, etc.; thus COD can be effectively removed; through oxidation of ozone, most of residual organic substances can be oxidized and decomposed into inorganic substances; then the wastewater can be filtered by active carbon so as to remove organic substances and inorganic substances such as heavy metals, ammonia nitrogen, etc. in wastewater through filtering and adsorption; and the COD of effluent is less than 100 mg / L. The provided technology can effectively process wastewater generated in lincomycin antibiotic production; the processing effect is good, the water quality of the effluent is stable; the COD concentration of the effluent is smaller than 100 mg / L, and the operation cost is reasonable.

The invention discloses a non-antibiotic pharmaceutical wastewater treatment process which is characterized by comprising the following steps: I. separating out grease in non-antibiotic pharmaceutical wastewater by virtue of an oil separator so as to obtain grease and wastewater a; II. leading the wastewater a into a collecting tank and preprocessing the wastewater a by virtue of a modified Fe-C microelectrolysis system so as to obtain processed wastewater b; and III. processing the wastewater b through the following processing tanks sequentially: a primary settling tank, a regulating tank, an up-flow anaerobic sludge blanket (UASB) anaerobic tank, an activated sludge tank and a biological contact oxidation tank, and settling sludge by virtue of a secondary settling tank until discharged water reaches a discharge standard. In processing non-antibiotic pharmaceutical wastewater, the process disclosed by the invention can be used for achieving high capacities of pollution resistance and resistance to impact load, avoiding the addition of a flocculating agent and the like and keeping a processing station at a relatively low running cost, and the quality of the discharged water can be kept within a stable range as required; and the wastewater treatment has a broad application prospect.

The invention discloses a method for PMIDA wastewater produced by using an IDA method. The method comprises the following steps: regulating pH of wastewater of PMIDA mother liquid condensate to be 12 by using quick lime and liquid caustic soda; introducing steam and heating to be at 50-60 DEG C; performing alkali condensation and introducing into a biological water distributing tank; regulating pH of secondary washing water to be 1-3 and performing a micro-electrolytic reaction; adding hydrogen peroxide and performing catalytic oxidization in the presence of a surface catalyst; regulating pH to be 7.5-8; pumping wastewater into a biochemical system; using a strain which can be tolerant to 1-3 percent of salinity; degrading organic pollutants by using an ABR anaerobic I / continuous aerobic I / ABR II / continuous aerobic II method and simultaneously turning organophosphorus into orthophosphate; precipitating sludge and transporting outwards; enabling liquid supernatant to flow into a phosphorous removal reaction tank; adding coagulants and lime to be fully subjected to reaction to enable mixed liquid to flow into a phosphorous removal precipitation tank; enabling the liquid supernatant to reach the discharge standard; transporting outwards the sludge. The method is low in operation cost; effluent water is subjected to biochemical treatment so that COD completely reaches the discharge standard; after chemical phosphorous removal, the total phosphorous reaches the discharge standard, so that the pollutants are reduced to the lowest level, the chromaticity is greatly reduced, and the method has a good environmental effect.

The invention discloses a method for improving biodegradability of organic silicon wastewater through two stages of ozone catalytic oxidation. The two stages of ozone catalytic oxidation are adopted for wastewater at different treatment stages, a two-stage biochemical treatment process is adopted, the two stages of ozone catalytic oxidation are set before two stages of biochemical treatment, thusby adopting an ozone catalytic oxidation process before the two stages of biochemical treatment, the biodegradability of the wastewater is improved, the purpose of decreasing effluent COD to 100 mg / lis achieved, the treatment cost is low, and operation is easy.

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 field of wastewater treatment, in particular to a method for synergistically pretreating TDI production wastewater by utilizing chemical waste. The method comprises the following steps: heating hydrogenated wastewater and acidic wastewater in the TDI production process to 70-100 DEG C, mixing the heated hydrogenated wastewater and acidic wastewater with one or more high-temperature wastewater in the TDI production process to obtain mixed wastewater with the pH value of 1-4, adding a catalyst and hydrogen peroxide into the mixed wastewater, and reacting at 130-180 DEG C under the pressure of 0.2-2 MPa for 10-120 min to implement wastewater treatment; or adding a catalyst, the chemical waste containing methylsulfonyl chloride and hydrogen peroxide into the mixedwastewater, and reacting for 10-120 minutes at the temperature of 130-180 DEG C and the pressure of 0.2-2 MPa, so as to realize the treatment of the wastewater. According to the method disclosed by the invention, impurities such as mononitrotoluene and dinitrotoluene in the wastewater do not need to be separated in advance, condensed precipitates, chemical sludge and volatile gas are not generatedin the treatment process, the operation environment is improved, and the operation cost is reduced.

The invention discloses a method for removing chemical oxygen demand of landfill leachate, wherein the method is applied to sewage treatment, and can effectively remove the chemical oxygen demand in water through oxidation effect and flocculation effect of polyferric sulfate. The method comprises the following implementation steps: 1) determining the chemical oxygen demand value of sewage, and adding sodium hypochlorite and sodium chlorate into the sewage according to the proportional relation between the chemical oxygen demand and sodium hypochlorite; 2) adding an alkaline substance solid ora saturated solution, and adjusting the pH value to 10 or above; and 3) adding ferric chloride according to the chemical oxygen demand of the leachate, quickly stirring for several minutes, completelymixing, and precipitating for half an hour; and 4) adding a small amount of polyaluminium chloride, slowly stirring for 10 minutes, and precipitating for 1 hour. The invention discloses a method forremoving the chemical oxygen demand of landfill leachate, wherein the method has the characteristics of low cost, high speed and high application value, and can effectively remove the chemical oxygendemand index of sewage such as landfill leachate.

The invention discloses a black and odorous water body processing agent, which is prepared from following raw materials in parts by weight: 12 to 15 parts of pH adjuster, whose chemical component is buffer salts; 30 to 40 parts of reactant, whose chemical component is persulfate; 10 to 15 parts of zinc powder, 10 to 15 parts of copper powder, a coagulant aid, which is composed of 5 to 25 parts ofSiO2, 15 to 35 parts of CaCO3, and 0.5 to 2.5 parts of calcium chloride, and a micro-electrolysis agent, which contains 30 to 40 parts of iron powder and 10 to 15 parts of active carbon powder. Through iron powder and active carbon powder of the micro-electrolysis agent, countless primary batteries are formed; primary batteries carry out redox, coagulation, flocculation, adsorption, and catalysisreactions with high concentration organic substances in bottom mud of black and odorous water body; macromolecular organic substances are degraded into micromolecular substances, the COD and toxicityare reduced, the bottom mud is converted into anoxic bottom mud, and the environment of bottom mud is improved. The SiO2, CaCO3, and calcium chloride in the coagulant aid can promote the coagulation of black and odorous water body, increases the B / C ratio, and improves the environment of black and odorous water body.

The invention discloses a multi-core composite carbon source for strengthening nitrogen removal during sewage treatment. A preparation method of the multi-core composite carbon source includes: addingstarch into hot water of 70-100 DEG C, and stirring to enable starch liquid to be fully gelatinized; adding a starch hydrolysis catalyst and acetic acid while stirring, hydrolyzing at 80-100 DEG C for 1-2h, and adding alkali until pH value of a solution is 5.5-7.0; adding microbial prebiotic factor, vitamin and mineral, stirring well, filtering, and decoloring to obtain the multi-core composite carbon source. The multi-core composite carbon source is rich in various carbon sources needed by different microbial flora for metabolism, and weakening of flora diversifying in environment with a single carbon source is avoided; the multi-core composite carbon source is rich in microbial prebiotic factors like various trace elements, organic acid and natural biological hormone, so that microbialactivity of a biochemical system is improved while carbon source supplement is realized, flora diversity is enhanced, and a carbon source which is more efficient is provided for denitrification.