54 results about "Organic matter mineralization" patented technology

The invention provides a method for increasing the utilization efficiency of ozone and reducing the COD of wastewater. According to the method, a chemical agent for removing a hydroxyl radical capture agent generated in base catalysis ozone advanced oxidation is added into the wastewater so as to achieve the purposes. Calcium ions, barium ions and the like are added into a base catalysis ozone oxidation system, so that the hydroxyl radical capture agent becomes precipitate to be separated from the water and loses the capacity for capturing hydroxyl radicals, and accordingly the utilization efficiency of ozone is improved. In addition, part of organic acid generated by the calcium ions, the barium ions and the like and the ozone oxidation wastewater precipitates to be separated from the water, so that the consumption of ozone is reduced, and the utilization efficiency of the ozone treatment wastewater is indirectly improved. By means of the method, the reaction rate of ozone can be obviously increased, the utilization efficiency of ozone can be obviously improved, reaction time can be shortened, cost can be reduced, organic matter in the wastewater can be thoroughly mineralized, and the COD and the total phosphorus content of the wastewater can be significantly reduced.

The invention discloses a processing device and a processing method of nitrogen pollutant in secondary tail water of a sewage treatment plant, which belong to devices and methods for advanced sewage treatment. The processing device is vertically provided with a gas water mixing area, a main reaction area and a precipitation disinfection area from low to high. The volume ratio of the three areas is 1: 4.5-6.5: 1.5-2.5. First, air and the secondary tail water of the sewage treatment plate are pumped into the gas water mixing area for quick mixing, and then enter the main reaction area and form inner circulation current. Biological denitrification, mineralization of organics hard to degrade and the organic removing process are achieved in the main reaction area. Finally, water flows out from the main reaction area, precipitation and ultraviolet disinfection are conducted in the precipitation disinfection area, and the water is discharged from the device. Surplus sludge in the precipitation disinfection area is discharged at regular intervals from a sludge discharge port. The processing method has the advantage that the processing method is used for the denitrification process of water with low C/N ratio like the secondary tail water in the sewage treatment plant. The ammonia nitrogen removing rate can reach 35.2% to 47.8%, the total nitrogen removing rate achieves 55.2% to 72.8%,COD removing rate achieves 37.2% to 55.4% when a high resolution timer (HRT) goes from 5h-8h.

The invention discloses a method for producing hydrogen by using a dye-sensitized photocatalytic fuel cell (PFC) and degrading organic dye wastewater simultaneously. The method comprises the following steps of: introducing the organic dye wastewater into a PFC optical anode chamber, exciting organic dyes under the action of the irradiation of visible light and electro-catalysis, mineralizing organic matters of the optical anode chamber, and degrading the organic matters to form harmless substances such as CO2 and H2O. According to the method, electrons generated in the degradation process are enriched on the surface of an optical anode and are driven to a cathode electrode by an external circuit; and H<+> generated by the optical anode enters a cathode solution through a proton conductor and receives the electrons from a cathode to generate the hydrogen, so that the hydrogen is produced while the organic dye wastewater is degraded. According to the method, a PFC hydrogen production technology and a technology of degrading the organic dye wastewater are combined, and a dye-sensitized optical anode structure is adopted, so that the organic dye wastewater is degraded and the hydrogen is produced under visible light, and the feasible basis is provided for the actual application of completing solar decontamination and solar hydrogen production synchronously by the PFC in future.

The invention discloses preparation and application of a Sb-Ni-Nd co-doping SnO2 high catalytic activity positive electrode, and belongs to the technical field of electrochemical water treatment. A micropore titanium (mp-Ti) plate is used as a matrix, and a SnO2-Sb-Ni-Nd composite oxide coating is immobilized on the mp-Ti plate. (1) A modified sol using citric acid and ethylene glycol as matrixes and containing SnCl4, SbCl3, NiSO4 and NdCl3 is prepared; (2) after pretreatment of the mp-Ti plate, the mp-Ti plate is impregnated in the modified sol of the step (1), brushed and dried, then is calcined at high temperature, finally is rinsed with water, and dried for stand-by use. The Sb-Ni-Nd co-doping SnO2 high catalytic activity positive electrode is used for electrocatalytic oxidation of phenol which is a pollutant difficult to biodegrade in water, results show that the remove phenol ability is strong, and the organic matter mineralization rate is significantly higher than that of electrodes in the prior art. The prepred Sb-Ni-Nd co-doping SnO2 high catalytic activity electrode is high in catalytic activity and good in stability, and has a good industrial application prospect.

A caprolactam sewage advanced treatment method using an ozone catalytic oxidation technology is characterized in that the process flow of the method comprises the following steps: 1, pretreated caprolactam sewage is elevated through an inlet water elevator pump and enters a filter 3; 2, water discharged from the filter 3 automatically flows into an ozone catalytic oxidation tank 4, and ozone is introduced into the ozone catalytic oxidation tank 4 through an ozone generator 7 in order to carry out an ozone catalytic oxidation reaction; and 3, oxidized outlet water automatically flows into a clear water pool 5, air is pressed in through using a compressed air pump 8, and a backwash pump 6 backwashes clear water flowing from the ozone catalytic oxidation tank into the clear water pool 5 to the ozone catalytic oxidation tank 4 in order to accelerate oxidation. A metal ion supported catalyst is adopted in the invention, catalyzes generation of hydroxy free radicals from ozone, and reduces the activation energy of the oxidation reaction of the hydroxy free radicals, so organic matters difficult to degrade in the caprolactam sewage are mineralized and removed, or are directly oxidized and decomposed to form H2O and CO2.

The invention discloses a water treatment process by using tourmaline as the catalyst, using hydrogen dioxide as oxidation agent, wherein the weight volumetric ratio of the tourmaline and the water to be treated is 0.5-4g : 100ml, the volumetric ratio of the 30% hydrogen peroxide solution and the water to be treated is 0.1-4g : 100ml, the treatment temperature being 25-60 deg. C.

The invention provides a Ni-doped TiO2 microporous anode, a preparation method and an application, and belongs to the technical field of electrochemical water treatment. Sb-Sn-Ni is directly composited and deposited on a microporous Ti (mp-Ti) plate used as the substrate in a pulse composite electrodeposition manner, then the deposited material is calcined under a muffle for 2 hours, and the Ti/Sb-SnO2-Ni electrocatalytic electrode is prepared. The electrode is used for electrocatalytic oxidation of phenol in water. Results show than the electrode has high phenol removal capacity and high organic matter mineralization rate. The prepared electrode has high catalytic activity, good stability and long service life, thereby having better application prospect.

The invention discloses a train sealed-type toilet urinal fecal sewage integrated treater and a treating method thereof, which relate to sewage integrated treatment and is particularlly suitable for treating fecal sewage in train sealed-type toilet urinals. The invention aims to solve the problems of complex treatment process, high cost and difficulty in discharge after reaching standards in the passenger train sealed-type toilet urinals. The invention integrates the electric assisted oxidation treatment, internal circulation anaerobic treatment and electrocatalysis coupling aeration biological contact tank, so that fecal sewage is firstly electrochemically combusted by a electric assisted oxidation pond to mineralize organic substances; then, the discharged water enters the internal circulation anaerobic treatment for denitrification; the discharged water is biodegraded through the electrocatalysis coupling aeration biological contact tank to remove the organic substances COD and NH3-N; and finally, the discharged water is sterilized by ozone, thereby reaching the first-grade emission standard GB8978-1996. The invention is used for treating fecal sewage in cities, high concentration organic waste water and train sealed-type toilet urinal fecal sewage.

The invention discloses a treatment process for near-zero discharge of industrial wastewater; according to the process, a part of suspended substances and macromolecular colloids are removed from thewastewater by an ultrafiltration system, then the wastewater enters a primary reverse osmosis system and is desalted, and produced water is reused; the obtained concentrated water is softened by a medicament, then enters multiple media and has the suspended substances in the wastewater filtered and removed, and effluent enters cation exchange resin and is softened; after the hardness is reduced, the effluent enters an ozone catalytic oxidation unit, and a part of organic matters are mineralized; the effluent enters a primary activated carbon adsorption unit, has the content of organic mattersreduced and then is subjected to high pressure reverse osmosis desalination; produced water is subjected to primary reverse osmosis deep desalination, concentrated water enters a secondary activated carbon adsorption unit and is treated, and effluent is up to standard and is discharged; powered activated carbon and the produced water are separated by a membrane separation way, the residence time of activated carbon in a pool is prolonged, the adsorption capacity of activated carbon to the organic matters is increased by 30% compared with a one-off stirring and mixing reaction pool, and the activated carbon flows from low-concentration wastewater to high-concentration wastewater, the adsorption capacity of the activated carbon is fully utilized, the addition amount is saved and the cost isreduced.

The invention discloses an electro-catalytic oxidation device and method for sewage treatment. The device comprises a transparent tank body and a plurality of electrode groups arranged in the tank body in sequence in a criss-cross manner from bottom to top; each electrode group comprises a plurality of electrodes horizontally arranged in parallel; each electrode is fixed on the side wall of the tank body through an electrode support; the part between the tank body and the electrodes is filled with a filler which comprises activated carbon, lanthanum ferrite, silicon dioxide and titanium dioxide which are uniformly mixed. The method comprises the steps of pH regulation, electro-catalytic oxidation and activated carbon filtration which are carried out in sequence. According to the electro-catalytic oxidation device and method disclosed by the invention, as the mixed filler of the activated carbon, the lanthanum ferrite, the silicon dioxide and the titanium dioxide is arranged in the tank body, on one hand, the current efficiency of electro-catalytic oxidation is improved, and the electricity consumption is reduced; on the other hand, by utilizing the light sensitivity of the lanthanum ferrite, visible light transmits through the tank body to irradiate to absorb and decompose macromolecular organic matters; moreover, the waste heat effect of silicon dioxide, titanium dioxide and electro catalytic oxidation reaction is realized, and the mineralization of the organic matters in sewage is accelerated.

The invention discloses a bamboo filament biological membrane seriously polluted riverway water restoring device and method and belongs to the field of polluted water ecological restoration. The bamboo filament biological membrane seriously polluted riverway water restoring device is sequentially provided with a gas-water mixing zone, a main reaction zone and a sedimentation zone in longitudinal direction from bottom to top, wherein volume ratio of the gas-water mixing zone to the main reaction zone and the sedimentation zone is 1:(2.5-4.5):(1.2-2). The bamboo filament biological membrane seriously polluted riverway water restoring method comprises that firstly the air and raw water are quickly mixed in the mixing zone; then a mixture of the air and raw water enters into the main reaction zone and internal circulation is formed, mineralizing and removal on refractory organics as well as nitrification and denitrification are realized in the main reaction zone; finally effluent of the main reaction zone is discharged outside after being sedimented in the sedimentation zone; residual sludge of the residual zone is periodically discharged from a sludge discharging hole. Removal rates of CODMn, CODcr, ammonia nitrogen, total nitrogen and turbidity can respectively reach 10.57-74.34%, 56.3-88.9%, 12.30-86.67%, 49.38-70.93% and 20.01-100%.

The invention discloses a method for treating washing wastewater of coal chemical industry. The method comprises the following steps: firstly, carrying out partial removal on tar, suspended impuritiesand other macromolecular substances in the wastewater through a magnetic flocculation precipitation strengthening flocculation effect, then carrying out ultraviolet activated persulfate oxidation toexcite generation of sulfate radicals, effectively carrying out ring opening on refractory organic matters such as pyridine and quinoline to be decomposed into easily degradable substances such as allyl alcohol and acetamide, and thus improving the removal rate of the refractory organic matters and improving the biodegradability of the wastewater; reusing an photoelectric-Fenton oxidation method,producing a Fenton reagent by using an electrochemical method to treat the wastewater, and meanwhile, introducing ultraviolet light, wherein the ultraviolet light and Fe<2+> have a synergistic effecton the catalytic decomposition of H2O2, so that the decomposition rate is greatly improved, the refractory organic matters can be effectively treated, the degree of mineralization is high, secondary pollution cannot be generated, the operation is simple, the control parameters are only voltage and current, and the automatic control can be conveniently realized.

The invention belongs to the field of hazardous waste treatment and disposal, and concretely discloses a method for harmlessness and resource utilization of waste salts in the chemical industry, usingsodium chloride as a main component. The method concretely comprises the following steps: a certain amount of chemical waste salts is taken, is placed in water, and is fully dissolved under the combined action of ultrasonication and stirring in order to obtain a salt solution A which is nearly saturated; the salt solution A is filtered to remove insoluble impurities in the salt solution A in order to obtain a salt solution B; the salt solution B is subjected to catalytic oxidation treatment to mineralize or decompose organic matters in the salt solution B into small molecular organic matters;the salt solution B is precisely filtered to obtain a salt solution C; and the salt solution C is spray-dried to make the small molecular organic matters in the salt solution C enter the gas phase with water vapor, and the obtained material is purified and discharged to obtain a dried sodium salt product. The method of the invention realize the harmlessness of the hazardous wastes such as chemical waste salts, and also allows the sodium salt byproduct which meets the quality requirements of the industrial product in order to achieve the harmlessness and resource utilization of the chemical waste salts.

The invention relates to a photocatalysis portable water quality total organic carbon detection device and a detection method and belongs to the technical field of environmental protection monitoring.The detection device comprises a sample injection module, a photocatalytic reaction module and a carbon dioxide detection module which are connected in sequence, wherein the photocatalytic reaction module comprises a reaction chamber and a photocatalytic sheet, the photocatalytic sheet can catalyze organic matters in a water sample to generate carbon dioxide under the irradiation of ultraviolet light, and the carbon dioxide detection module detects the concentration of the carbon dioxide generated in the photocatalytic reaction module so that the content of total organic carbon in the water sample is calculated. The detection device is advantaged in that the detection device can be used for detecting a TOC value of the water sample in a certain time period at a certain place in a portableand real-time manner, is different from a combustion method of a traditional TOC detector, and the efficient photocatalysis technology is utilized to mineralize the organic matters into carbon dioxide for detection in a short time, and has great significance in the aspects of energy conservation and environmental protection.

The invention relates to a preparation method of a photocatalyst, in particular to a preparation method of a polyacid intercalation 3D-LDHs photo-Fenton catalyst, belongs to the technical field of preparation of environment materials and aims to solve the technical problems that existing photocatalytic materials require harsh preparation conditions such as nitrogen atmosphere protection and CO2 removed deionized water and the mineralization degree of organic matter is incomplete in the organic pollutant removal process. The method comprises the steps as follows: Co(NO3)2.6H2O or Ni(NO3)2.6H2O,Fe(NO3)3.9H2O, urea, NH4F and a Tris solution are subjected to a reaction in an autoclave, obtained gel is re-dispersed in a Na2CO3 solution, and washing and drying are performed to obtain a sample;the prepared sample is dispersed in a PMo10 or CoW12 solution, and filtration, washing and drying are performed to obtain the catalyst. The catalyst prepared under the condition of no nitrogen protection and no CO2 removal has the degradation rates of 90% or above and mineralization rates of 73% or above for persistent organic pollutants including azo dyes (methylene blue and methyl orange) and 1-chloronaphthalene within 50 min under the synergistic effect of photocatalysis and Fenton catalytic oxidation.

The invention discloses a rhizo-spherical beneficial microorganism-charcoal composite organic fertilizer and a preparation method thereof. The rhizo-spherical beneficial microorganism-charcoal composite organic fertilizer comprises the following steps that 1, organic matter and charcoal are mixed to obtain a premix; 2, composting fermentation the premix in the step 1; 3, rhizo-spherical microorganisms are added in the fermentation product in the step 2 to obtain the rhizo-spherical beneficial microorganism-charcoal composite organic fertilizer. Plant sourced and animal sourced organic matter are subjected to mixed fermentation, the raw materials are innocently treated to form charcoal, the charcoal effect of the charcoal is played, and the clean organic fertilizer is produced. The rhizo-spherical microorganisms promoting plant growth are added in the fermentation product, the organic matter degradation and mineralization process is catalyzed, the fertilizer still has activity after being applied to soil, and the organic matter mineralization efficiency and soil phosphate degradation are improved.

The invention discloses a split type electro-Fenton device and a method for efficiently processing coal chemical industry wastewater through the device. The split type electro-Fenton device comprisesa preprocessing tank, an electrolytic reaction tank, a precipitation tank and a power unit. The preprocessing tank comprises a filtering tank and an oil and sulphur removal cavity. A hydrocyclone andan annular oil collecting pipe are arranged in the oil and sulphur removal cavity. The electrolytic reaction tank comprises an electrolysis cavity and a Fenton reaction cavity. An electrode plate is arranged in the electrolysis cavity. A pH detecting device and a stirring device are arranged in the Fenton reaction cavity. The power unit provides power for the hydrocyclone, the pH detecting deviceand the stirring device. The split type electro-Fenton device is simple in structure, high in organic matter mineralization degree, low in energy consumption and good in decomposition and removal effect on pyridine and heterocycle type organic pollutants.

The invention discloses a multi-dimensional advanced oxidation organic wastewater advanced treatment method and system. The treatment method comprises the following steps: carrying out reaction on pretreated wastewater and advanced oxidation gas under a multi-dimensional advanced oxidation condition, so as to realize purification treatment on the wastewater, wherein the advanced oxidizing gas is O2, O3, ClO2 or Cl2, and the multi-dimensional advanced oxidation conditions are 1) or 2): 1) advanced oxidation gas, ultraviolet light and a catalyst; and 2) carrying out electrocatalytic oxidation and/or photocatalytic oxidation by using advanced oxidizing gas, ultraviolet light and a catalyst. The method and the system have the following advantages: ozone is an excellent oxidant, is easy to prepare, can be quickly decomposed in water, and has no secondary pollution; various advanced oxidation technologies are coupled, so that the degradation efficiency is improved, the degradation time is saved, and the method is suitable for various organic wastewater; a pretreatment system is added, so that energy consumption is reduced, and the operation cost is reduced; and the method is green and environment-friendly, simple in process, free of high temperature and high pressure and low in equipment cost.

The invention discloses a device for treating phosphorus-containing organic wastewater by using an A/O soil percolation system. A centrifuge guides layered discharged water into the A/O soil percolation system; the A/O soil percolation system comprises an anaerobic soil percolation area and an aerobic soil percolation area, respectively; and water discharged from the centrifuge is guided into the bottom in the anaerobic soil percolation area by a water inlet pipe; water discharged from the A/O soil percolation systems is sprayed into a surface turbulent flow screening and filtering device, so that viruses and heavy metals in the water are removed, and organic matters are mineralized or decomposed; then the water enters a rotary sand removal device to carry out sand removal, and finally clean water reaching the standard is discharged. According to the invention, an A/O process is used in a soil percolation system, and the soil percolation system is improved by using the A/O process and an alternate vertical flow concept, so that the cost and expense of deep treatment of sewage are reduced, the production of secondary pollution in the treatment process is avoided, and the effluent water quality of sewage is enhanced.

The invention discloses a technology for removing organic matters in reverse osmosis concentrated water. The technology is characterized in that one part of organic matter is mineralized and removed by oxidization reaction, and then the organic matter is further removed by adsorption via activated carbon. The technology has the advantages that one part of organic matter is mineralized and removedby the composite oxidization type, and then the organic matter is further removed by adsorption via activated carbon, so that the organic pollutants in the wastewater can be effectively removed, the wastewater can be drained after the wastewater reaches standard, and the content of COD (chemical oxygen demand) in drained water is lower than 80mg/L; meanwhile, the activated carbon after adsorptioncan be regenerated by an organic solvent, and be recycled, so that the cost is reduced; both of environmental benefit and economic benefit can be realized.

The invention relates to water quality stabilization bricks, which comprise a meshed shell, high polymer porous medium carriers, porous media carriers with large specific gravity and flukes, wherein the high polymer porous medium carriers and the porous medium carriers are arranged on upper and lower parts in the meshed shell respectively; at least two flukes are arranged at the bottom end of the meshed shell; the high polymer porous medium carriers are made of polyurethane blasting foaming fillers with a specific gravity of less than 1; and the porous medium carriers are made of volcanic, zeolite or porous baked bricks. The water quality stabilization bricks have the advantage that high polymer porous media are taken as the carriers to generate a large number of anaerobic bacteria and facultative bacteria epiphytically, so that an anaerobic reaction zone is formed in specific water bodies in a certain distribution way (normally at the bottom of water bodies). Microorganisms perform a metabolic reaction under the condition of an anaerobic reaction, so that high polymer organic matters are degraded to form micro-molecular organic matters, and the generated micro-molecular organic matters can be degraded metabolically by aerobic microorganisms to achieve the aim of mineralizing the organic matters. In addition, anaerobic microorganisms generate a large number of organic acid substances in the metabolic process to play a role in reducing the pH of the water bodies and provide the stable living environment for the survival of living beings.

The invention relates to a constructed wetland-plasma coupling system and a high-efficiency wastewater treatment method, is suitable for a deep treatment technology of nitrogen, phosphorus and organic polluted wastewater, and belongs to the field of water pollution control. The plasma discharge battery is suitable for an advanced treatment area of a sewage treatment plant, sewage flows through the plasma discharge battery, and macromolecular organic matters are mineralized into micromolecular matters by plasmas. The treated sewage flows into a wetland surface layer water distribution pipe through a water outlet of the plasma discharge battery so as to be uniformly distributed in a wetland system, small molecular organic matters are easy to biodegrade, and a carbon source is provided for the denitrification process, so that the nitrogen and phosphorus removal effect is improved. According to the invention, a discharge plasma technology and an artificial wetland technology are combined, macromolecular organic matters which are difficult to degrade in sewage are mineralized into micromolecular matters through plasmas, the biodegradability of organic micropollutants is improved, the removal of nitrogen in the artificial wetland is promoted, the sewage purification efficiency is effectively improved, and meanwhile, the blockage of a wetland system can be delayed.