41results about How to "Increase resistance to poisoning" patented technology

Disclosed is a technique for processing organic waste water, including the following steps: (a) preprocession: pour the waste water into the micro electrolytic reducing pool where the iron-carbon micro electrolytic reaction occurs under the agtatering effect, add hydrogen peroxide into it to have. Fento oxidation, then the water enters into coagulation pool into which add NaOH and PAM; (b) anaerobe hydrolysis oxidation procession: power the organic waste water preprocessed into high effective anaerobe hydrolysis oxidation pool in which add into the TCBS reactor in which add into high effective compound microbe, making the water mix with the flowing-back mud with high density after denitrification. The invention can increase the biochemical of organic waste water, strengthen its resistance to poison and impact as well as the biological denitrification funcation, and making the waste water reach the national environment protection requirement by reducing the polluting load by steps.

An anti-impact multiplying combination coking wastewater treatment technique relates to a treatment method of coking wastewater. The coking wastewater is first qualified by a physical-chemical pretreatment to improve biodegradable property of wastewater; the composite technology of a biological carrier of active sludge is adopted to do anaerobic/hypoxia/aerobic decarbonization/aerobic nitrification biochemical combination treatment; suspended or floating folding ball-shaped fillings are arranged in biochemical reactors and when micro organism traits are abnormal or a great amount of foams existing in the reactor, micro organism active incentive agents are added to the reactor in interval to improve active sludge traits and organism film quantity; finally the water is treated by a physical-chemical advanced treatment to reach a top grade standard. The invention not only strengthens the removal of COD, ammonia-nitrogen, volatile phenol and other pollutants in the coking wastewater by biochemical treatment but also resists serious water quality impact and has the advantages of quick system startup, less foams in an aeration tank, small occupying space, low operation cost and stable and effective treatment to coking wastewater.

The invention provides a method for treating nitrobenzene and aniline waste water. The invention treats waste water mainly through immobilized microorganisms - an anaerobic biofilter (I-AF) and immobilized microorganisms - a biological aerated filter (I-BAF); wherein: the waste water is homogenized through a regulating tank and then enters a sedimentation tank to remove suspended substances (SS) in the waste water by putting into polymeric iron or polymeric aluminum for coagulation reaction; and the yielding water reach the up-to-standard discharge after entering a three-grade I-AF reactor and a four-grade I-BAF reactor for the further treatment. For detailed method and steps, please see the description. The method has advantages that the biological treatment improves the toxin immunity of microorganisms by adopting the immobilized microorganism technique, thereby realizing the high efficient biologic removal to poisonous harmful substances such as high concentration nitrobenzene and aniline, reducing the treatment costs and realizing the up-to-standard discharge of waste water. The purposes of the invention are applied to the treatment of wastewater containing nitrobenzene and aniline, as well as the treatment to high concentration organic waste water and the like.

The invention provides a method for treating 2,4,6-trinitrotoluene (TNT for short) waste water. In the invention, waste water is mainly treated by immobilized microorganisms, an anaerobic biological filter (I-AF) and immobilized microorganisms and a biological aerated filter (I-BAF), wherein the waste water enters a collecting tank, is lifted by a pump to enter a regulating tank and enters a setting tank after being homogenized and neutralized by the regulating tank so as to remove suspended substances (SS) in the waste water; the effluent is discharged after reaching standards after enteringthree-stage I-AF and five-stage I-BAF for further treatment. The specific steps of the method are shown in the specification. The invention has the advantages that biological treatment adopts an immobilized microorganism technology, which improves the poison resistance of the microorganisms, realizes the high-efficiency removal on toxic and harmful substances of nitrobenzene and the like, reducesthe treatment cost and realizes the standard-reaching discharge of the waste water. The application of the invention is not only suitable for treating the TNT waste water but also is applied to treating nitrobenzene and aniline contained pollutants and organic waste water thereof.

The invention discloses a water resistant catalyst for aldol condensation. The water resistant catalyst comprises a main active ingredient, an active agent and a carrier, wherein the main active ingredient is one or more selected from oxides or salts of Cs; the active agent is one or more selected from oxides or salts of Sb, Nb, Ag, Al and Zr; the carrier comprises SiO2 and a carrier aid; the carrier aid is one or more selected from Al2O3, ZrO2, diatomite and kaolin; the SiO2 is hydrophobic nano SiO2; or (2) the catalyst is subjected to water-resistant treatment. The water resistant catalyst is used for aldol condensation, has the characteristics of high activity, high selectivity and long service life, is especially used for synthesizing methyl methacrylate through formaldehyde and methyl propionate. With calculation of methyl propionate, the selectivity of methyl methacrylate is 94 percent, and the single service life of the catalyst is over 400 hours. The catalyst is simple in preparation method and is suitable for industrial application.

The invention discloses a method of treating high-concentration metaformaldehyde waste water into reuse water, relating to a treatment technology of high-concentration metaformaldehyde waste water. The pH of metaformaldehyde waste water of which the formaldehyde content is 4000mg/L into 3.0-4.0, then metaformaldehyde waste water is sent into an anaerobic hydrolysis composite reactor combining activated sludge with biomembrane and an aerobic composite reactor; at last, a double-membrane method is adopted to treat to ensure that effluent reaches the standard of urban wastewater recycling industrial water quality, thus serving as recirculated cooling water. The invention strengthens removal of high-concentration formaldehyde, COD, trioxymethylene, divinylene oxide and other pollutants in high-concentration metaformaldehyde waste water by biological treatment, can effectively resist impact from violent water yield and water quality, and has the advantages of high system starting speed, small foam of the aerobic composite reactor, low operation cost, stable and effective treatment and zero discharge of waste water.

The invention discloses a graphene/molecular sieve/metal oxide composite catalyst and a preparation method thereof. The catalyst comprises graphene, molecular sieve and metal oxide. The weight ratio of the three materials is 3-38% of the graphene, 40-91% of molecular sieve and 4-37% of metal oxide. The prepared composite material has quasi -2D laminated structure. The metal oxide particle size is 10-20 nanometers. The preparation method comprises the steps of 1, mixing the graphene, silicon source, aluminum source and surface active agent, separating the part containing graphene, conducting crystallization, at last conducting purification and removing the surface active agent to acquire the graphene/molecular sieve composite material, 2, loading the metal oxide on the graphene/molecular sieve. The three element composite material can be used for the methanol electro-catalysis and oxidation, oxygen reduction (ORR), OER, CO2 electro-catalysis reduction, and exert very good catalytic activity. The stability and the poison resistance are enormously elevated, thus having promising application prospect.

The invention relates to a method for treating dye wastewater with high concentration by using a technology combining ultrasound wave with enzyme, comprising the following steps of: feeding the treated active carbon in a sonochemical reactor; attaching enzyme to the surface of the active carbon and holes; filtering and removing large-particle suspended substances in the dye wastewater; introducing the large-particle suspended substances into the sonochemical reactor; under the aeration condition, radiating the fluidized state active carbon to which the enzyme is attached by using ultrasound wave with the frequency 40kHz and the power of 40W; generating a hydroxyl free radical with extremely-strong oxidation capacity and adsorption and decolorization reaction of the active carbon by using the coupling action of ultrasound-enzyme technology, thereby improving the biochemical property of the wastewater; and enabling the treated dye wastewater flowing out of the sonochemical reactor and then entering a bioreactor for further degrading. The invention has remarkable decolorization effect of the wastewater and greatly improves the biochemical property when being used as a pretreatment method of the dye wastewater with high concentration.

The invention relates to a nitrogen-doped graphene hollow microsphere (NGHM) preparation method. Polystyrene microspheres as templates, graphene as a carbon source and melamine as a nitrogen source are calcined to form NGHM. The prepared NGHM has good oxygen reduction reaction (ORR) catalytic performances. Compared with the commercial Pt/C catalyst, the NGHM has slightly lower OPP onset potential and the same ORR limiting current density. Compared with Pt/C, the NGHM has higher stability and toxicity resistance and has a lower cost. The prepared NGHM can completely replace the commercial Pt/C.

The invention discloses an efficient and deep treatment process for high-concentration waste water in a natural gas industry. High-concentration industrial wastewater is subjected to physicochemical pretreatment to improve the biodegradability of the wastewater, and toxic and harmful substances in the wastewater are eliminated simultaneously, medium and low-concentration gas-field wastewater and domestic wastewater are mixed, and biochemical treatment is performed, accordingly, the biochemical treatment efficiency is improved, poison and impact resistances of a system are enhanced, and the denitrification function is strengthened. The technological process is simple, the operation is stable, the removal rate is high, investments and operation costs are saved, the process can be fully applied to treat industrial wastewater of various gas fields, and discharged water can achieve environment friendly emission standards required by the country.

The invention relates to a treatment process of glycine condensation wastewater, which specifically comprises the following steps: spraying the glycine condensation wastewater down from a first-level deamination tower; absorbing in air from the bottom of the first-level deamination tower in which the air is absorbed by sulfuric acid to generate ammonium sulfate, recycling the ammonium sulfate, conveying the rest wastewater to a second-level deamination tower by a second-level lift pump, and spraying the wastewater down from the second-level deamination tower to realize free flow; absorbing in air from the bottom of the second-level deamination tower in which the air is absorbed by sulfuric acid to generate ammonium sulfate, recycling the ammonium sulfate, and conveying the rest wastewater to a first-level EGSB anaerobic reactor by a first-level anaerobic lift pump; conveying the wastewater in a first-level anaerobic water collection tank to a second-level EGSB anaerobic reactor by a second-level anaerobic lift pump; and discharging the wastewater from the upper part of a second-level anaerobic sedimentation tank and conveying to an aerobic tank by an aerobic lift pump, wherein the bottom of the second-level anaerobic sedimentation tank is connected with an EGSB reflux pump. The total operation cost of the system is 3-4 yuan/m<3>, the high-concentration water can be diluted by 10-30 times through the three reflux systems, and the tolerance of an anaerobic system to the toxicity of high-concentration wastewater is improved to a relatively great degree.

The invention provides a dehalogenation degradation method for a halogenated pyridine compound. The halogenated pyridine compound is adopted as a raw material, alcohol is adopted as a hydrogen source, water is adopted as a solvent, reacting is carried out for 3-10 h under normal pressure at the temperature of 20 DEG C to 120 DEG C under the action of a supported catalyst, and the halogenated pyridine compound is subjected to dehalogenation degradation in situ through water phase hydrogen production. A pyridine ring of the halogenated pyridine compound at least contains an F or Cl or Br or I substituent group. The supported catalyst is composed of an active component and a carrier, the active component is composed of a mixture of transition metal and other metal, the transition metal is one of Rh, Pd, Pt and Ni, and other metal is one of Se, Ca, Ba, La and Ce. The carrier is one of activated carbon, kieselguhr, zeolite, gamma-Al2O3, AlF3 and MgO. H2 is not directly used as a reduction agent, activated hydrogen is prepared through in-situ catalysis to directly participate in reacting, the advantages of being high in reaction activity, high in selectivity, high in safety, environmentally friendly and the like are achieved, and good application prospects are achieved.

The invention discloses a preparation method for a wet oxidation catalyst. The preparation method includes the following steps: (1) processing active carbon by adopting carbohydrate, and performing pulping; (2) dissolving a copper source precursor into a solution; (2) dissolving a cerium source precursor into a solution; (4) mixing materials prepared by the step (1), (2) and (3), adjusting pH values to form deposition, and performing filtering, washing and drying, and roasting in an inert gas environment so that a powder material can be formed; and (5) mixing the powder material of the step (4) with a manganese source precursor solution into slurry, and adding a pore forming agent after stirring, performing seal standing to form the mixture into a clover shape through extruding after secondary stirring, coating nanometer zirconia after drying, and performing roasting in an inert gas environment to form a wet oxidation catalyst. The prepared wet oxidation catalyst can be used for high concentration organic wastewater, and has characteristics of large specific surface areas, strong sulfur tolerance and stable catalytic activity, etc.

The invention belongs to the field of industrial waster water treatment, and more particularly relates to the technical field of waste water treatment of mixed waste water containing pollutant such as nitramines, nitrobenzenes and anilines and the like in the explosive and polyurethane industry by using pretreatment in combination with a biochemistry method. A mixed treatment method of explosive waste water and nitrobenzene and aniline waster water is characterized in that the waste water reaches the recycling standard after being subjected to procedures, such as activated carbon adsorption, neutralization with limestone and caustic soda liquid, flocculation settling, biochemical treatment with an up-flow anaerobic sludge blanket (UASB)/AF (Anaerobic filter) and activated sludge, processing with a ceramisite biological aerated filter (BAF), filtration and adsorption, waste activated carbon and sludge after-treatment. The mixed treatment method disclosed by the invention has the advantages of stable and reliable equipment operation, qualified effluent continuity, small excess sludge amount, low energy consumption, reasonable process, strong applicability and relatively good shock resistance and operability.

The invention provides a treatment method of nitro-nitrate-based explosive wastewater, and belongs to the technical field of explosive wastewater treatment. The treatment method comprises the following steps: homogenizing and averaging the nitro-nitrate-based explosive wastewater, adjusting the pH value to 4-5, and then mixing with nutrient substances to obtain wastewater to be biochemically treated; sequentially carrying out anaerobic treatment, denitrifying treatment and aerobic treatment on the wastewater to be biochemically treated, and enabling the aerobically treated effluent to pass through an MBR (membrane bioreactor) to obtain biochemically treated wastewater; and precipitating the biochemical treatment wastewater, and performing activated carbon adsorption to obtain purified water. Physicochemical and biological treatment technologies are combined, the process is reasonable, the operation is safe, the operation cost is low, the impact resistance and the operability are good,and the problems of high COD concentration, high treatment difficulty, high operation cost and high operation labor intensity of the nitro-nitrate explosive wastewater are effectively solved.

The invention discloses a hydrogen sulfide sensor with a black phospho-TiO2 nanotube/Ti sensitive electrode. The sensor comprises a sensor shell and a membrane electrode arranged in the sensor shell,an air chamber is arranged between the sensor shell and the membrane electrode, a gas reaction chamber is arranged in the membrane electrode, and the membrane electrode comprises a cathode diffusion layer, a cathode catalyst layer, a Nafion membrane and a black phospho-TiO2 nanotube/Ti sensitive electrode from outside to inside; the cathode diffusion layer is connected with the sensor shell through a welding point to form a cathode output end, the black phospho-TiO2 nanotube/Ti sensitive electrode is connected with the sensor shell through a welding point to form an anode output end, and a gasfiltering cap with diffusion holes is arranged at a top end of the gas reaction chamber to allow hydrogen sulfide gas to be detected to pass through; an air circulation hole cover communicated with the air chamber is arranged on the sensor shell, a water discharge hole is formed in the bottom of the air chamber, and an SO2 discharge hole is formed in the bottom of the black phospho-TiO2 nanotube/Ti sensitive electrode. The sensor provided by the invention has good selectivity on hydrogen sulfide gas and strong anti-poisoning and anti-interference capabilities.