97 results about "Wastewater" patented technology

The invention discloses an alcaligenes faecalis and application thereof. The alcaligenes faecalis is named alcaligenes faecalis (Alcaligenesfaecalis) NR and is stored in the China General Microbiological Culture Collection Center (CGMCC) with CGMCCNo.7543 on April 28, 2013. The alcaligenes faecalis is applicable to the treatment of nitrogen-containing organic wastewater and can be used for synchronously removing nitrogen and organic carbon in the wastewater. The alcaligenesfaecalis NR has both functions of denitriding and removing the organic carbon synchronously, only needs one aerobic stage to realize the synchronous removal of the organic carbon and nitrogen, and has the removal rate of about 80 to 90% for the organic ratio, and the removal rate of about 78 to 88% for TN (Total Nitrogen).

The invention relates to a method for disposing organic wastewater by photocatalysis of double rotating table photocell liquid film reactor in the technical field of environmental catalysis. TiO2 photocatalyst is loaded on the base and is used as photo anode, which is fixed together with the cathode on the rotating shaft for forming a double rotating table, the lower half of the double rotating table is immerged in wastewater, and the double rotating table is connected with the carbon brush connecting with the rotating shaft by leads. The motor is started, and the rotate speed of the double rotating table is controlled, thus a layer of liquid film is formed on the surface of the double rotating table. An uviol lamp is taken as the excitation light source, the photoinduced electrons on the surface of the photo anode of the TiO2 film rotating table is transferred to the surface of the cathode of the rotating table, the photoinduced electrons react with the saturated dissolved oxygen on the surface of the cathode rotating table so as to generate H2O2, and the indirect oxidation to organic matter and the direct oxidation to organic matter by photo cavity on the surface of TiO2 film photo anode rotating table improve the degradation efficiency; and the rotation of the rotating table speeds up exchange and update of electrode surface and bulk solution substance, mass transfer is strengthened, and higher effect thereof can be realized.

The invention relates to a micro-electrolytic filler containing a catalyst, which comprises ferrum and carbon and is added with a catalyst. The mass percents of ferrum, carbon and catalyst in the filler are 45-55%, 40-50% and 1-5%, respectively. The catalyst is one or more of the following elements: copper, vanadium, molybdenum and antimony. The invention has the advantages that, firstly, the COD de-electrolyzing rate in wastewater which has large concentration of organic matters, high poisonousness and high chromaticity and is hard to treat biochemically is improved by 10-20%, the COD removing rate is about 35-60%, the chromaticity can be removed by 60-90% and meanwhile the B/C value is improved by 0.1-0.3 and biodegradability of the wastewater is improved; secondly, the cylindrical cellular structure of the filler is beneficial to ensure adequate contract reaction of the filler and water to reduce the flowing resistance of the water; and thirdly, the carbon bed is not easy to passivate and harden and be blocked by iron mud, and the amount of sludge is reduced.

A water evaporation system and method for disposing of excess water left over from oil or gas drilling, fracturing, and production operations and from other wastewater producing operations. The system comprises a pumping system for pumping the wastewater from a pond through a filtration system and then to one or more nozzle arrays attached to cables suspended over the pond.

The invention discloses a scale advanced treatment method for livestock and poultry farming waste water. The method of the invention comprises the following steps: (1) adding acid to the livestock and poultry farming waste water after biological treatment, and regulating the pH value of the waste water to be less than or equal to 5.0; (2) adding H2O2 and soluble ferrite to the waste water to carry out oxidation reaction, wherein the mol ratio of the H2O2 to the Fe<2+> in the soluble ferrite is between 1:1 to 2:1; and (3) after carrying out reaction for not less than 10 minutes, adding alkali to reaction liquid, regulating the pH of the reaction liquid to be greater than or equal to 6.0, carrying out flocculating and depositing, and then discharging deposit and waste water according with the discharge standard. By controlling the pH value of the reaction system, the adding proportion of the H2O2 to the FeSO4, and the running time, the invention achieves the treatment effect and optimization of energy consumption. The process effectively oxidizes and decomposes the trace organic pollutants (incretion interferents, antibiotics and the like), simultaneously removes various heavy metals and phosphorus by coagulating sedimentation, inactivates pathogenic bacteria in the waste water, and realizes integrated high-efficiency reinforcement treatment of the livestock and poultry farming waste water.

The invention discloses a method for refining rice bran oil by using short distance distillation. The method is implemented by putting crude rice bran oil in a buffer pot directly, transferring into a primary film evaporator by a pump for dehydration and desaeration, performing primary dehydration and desaeration under conditions of temperature being 60-120 DEG C and pressure being negative 0.8MPa to negative 0.95MPa; pumping the dehydrated and desaerated rice bran oil into a secondary short distance evaporator for deacidification with temperature controlled at 100-200 DEG C and pressure at 100-0.1Pa to obtain oleic acid with high acid value and rice bran oil with low acid value. The invention avoids heavy pollution processes of alkali refining and neutralizing chemical process for obtaining soda soap and process discharging waste water of washing when processing rice bran oil, the procedure is simple, high value oleic acid and low acid value rice bran oil can be distilled and separated, and the separation process is a physical process, the rice bran oil has no loss and the yield is very high.

The invention discloses a method for removing phenol in phenol contained wastewater by using a hollow fiber membrane. The method comprises the following steps of: mixing a carrier and a diluent to prepare an extractant, wherein the adopted extractant carrier is tributyl phosphate, and the adopted diluent is coal oil or benzene; stirring and fully mixing the extractant and a stripping agent to prepare treating fluid; removing the phenol out of the phenol contained wastewater by using a hollow fiber membrane device; and after pretreating the hollow fiber membrane device, injecting the treating fluid into a tube pass of a membrane component, and injecting the phenol contained wastewater into a shell pass of the hollow fiber membrane component, wherein the wastewater can be treated through the same membrane component or a plurality of serial membrane components in a circular manner for many times; after the wastewater is subjected to two-stage treatment, the phenol concentration is less than 100mg/L; and after the wastewater is subjected to five-stage treatment, the phenol concentration is less than 5mg/L, the removal rate reaches up to 99.8 percent, and the wastewater reaches the national emission standard.

The invention discloses a water pollution online analysis and quick source tracing method used for strengthening supervision of wastewater discharged by enterprises in the industries of printing and dyeing, coking, electroplating, electronic manufacturing, papermaking, pharmacy, metal manufacturing and the like. According to the method, a multi-channel laser Raman online analysis and multi-channelelectrochemical online analysis combined technology is adopted to perform online analysis and monitoring on multiple types of pollutants possibly occurring in a monitored water area, and the online analyzed and monitored water pollution data is analyzed automatically by utilizing a pre-constructed pollution source database, source tracing software and a data analysis platform so as to realize online water pollution source tracing. By adopting measures such as multiple test channels, a wide-electrochemical potential window three-dimensional bismuth film alloy electrode, a modulation asymmetricsquare wave test method, a surface enhanced Raman accessory and the like, the test rate, the detection capability and the monitoring resolution capability of online analyzing and testing various types of pollutants are ensured.

The invention relates to the field of photocatalysis, and particularly relates to a visible-light-driven photocatalyst for degrading dye in wastewater, and preparation and application thereof. The visible-light-driven photocatalyst for degrading dye in wastewater is characterized in that mesoporous silicon dioxide of which the framework contains Ti atoms is used as a carrier, the mesoporous silicon dioxide carrier carries graphitic carbon nitride, and bivalent Cu ions are doped on the graphitic carbon nitride, wherein the graphitic carbon nitride with the doped cupric ions serves as a main catalyst, and the element Ti serves as a cocatalyst. The Ti atoms contained in the framework of the mesoporous silicon dioxide directly react with H2O2 in a photo-Fenton-like system to produce hydroxyl free radicals, thereby obviously improving the photo-Fenton-like reaction activity. The photocatalyst provided by the invention catalyzes degradation of methyl orange and/or rhodamine B in wastewater, and degradation can be performed at room temperature under the irradiation of visible light, thereby enabling the photocatalyst to have the advantages of mild reaction conditions, low cost and easy implementation; and the photocatalyst can be easily regenerated, and still has excellent photocatalytic performance after being regenerated many times.

The invention relates to a polymer composite material filled with industrial lignin as well as a preparation method and an application thereof. The polymer composite material is characterized in that substances forming the polymer composite material comprise rubber A, lignin and a third constituent, wherein the ratio of the oven dry parts by weight of the substances in the polymer composite material is 100:(10-300):(0-100); the rubber A is natural rubber or synthetic rubber produced by an emulsion polymerization method; the lignin is hydroxymethylation modified lignin produced from alkali lignin or black liquor; in a technical scheme in which the oven dry part by weight of the third constituent is greater than 0, the third constituent is one or the combination of more than two of other rubbers or plastics except the rubber A, or a plasticizer or operating oil, or argil, montmorillonoid, kaolin, kieselguhr or calcium carbonate, or papermaking pulp taking calcium carbonate as a main ingredient, or alkali-preparing waste, namely, white clay; the polymer composite material filled with the industrial lignin is of a block form or a powder form. According to the polymer composite material filled with the industrial lignin as well as the preparation method and the application thereof disclosed by the invention, the manufacturing cost is further decreased, and wastewater generated during the production process is further reduced.

The invention discloses a double-alkali neutralization treatment method of heavy metal-containing acidic wastewater. According to the double-alkali neutralization treatment method, sodium hydroxide is mainly used for adjusting a pH value so that metal ions in acidic wastewater form precipitates, the precipitates are recovered, the recovered metal sludge is treated and then can be used as metal oxides for next use, through lime use, fluorine ions in the wastewater form precipitates, and the precipitates do not contain heavy metals and can be treated by a common sludge treatment method. The sludge treated by the double-alkali neutralization treatment method is not used as dangerous waste or can be used as a fluorite-like accessory material, and the rest of the wastewater satisfies discharge standards by slight treatment.

The invention discloses a coagulating agent for use in the treatment of wastewater containing fluorine and an application process thereof. The coagulating agent for use in the treatment of water containing fluorine is a composite coagulating agent prepared by adding a polymer organic additive during the synthesis of aluminium polychlorid; the polymer organic additive is a cationic polyacrylamide having a 10 to 30 percent amination degree and a 5 to 8 million molecular weight; and the mass of the added polymer organic additive is 1 to 10 percent of that of AlCl3.H20. The application process comprises: adding a modifier of lime milk into the wastewater containing fluorine to adjust the pH value of the wastewater containing fluorine to between 6 and 9; and adding the coagulating agent for use in the treatment of wastewater containing fluorine into the wastewater containing fluorine for coagulation in an amount of 900 to 1,500 milligrams of coagulating agent for use in the treatment of wastewater containing fluorine per liter of wastewater containing fluorine. The coagulating agent for use in the treatment of wastewater containing fluorine is low in raw material price and production cost, and the application process is simple, high in removal efficiency and low in investment cost and has the advantages of high efficiency and economy.

The invention provides preparation and application of nano zeolite reinforced xanthan gum composite hydrogel functional microspheres. The method selects a nanoscale zeolite molecular sieve which is synthesized by a template-free and low-cost manner, then premixes the nanoscale zeolite molecular sieve into a xanthan gum-sodium alga acid binary natural polysaccharide aqueous solution to prepare nano zeolite molecular sieve reinforced organic-inorganic composite hydrogel functional microspheres. Corresponding nano zeolite has a clear synergetic heavy metal adsorbing behavior; meanwhile, a corresponding xanthan gum-sodium alga acid binary polysaccharide cross-linking matrix has a richer micro three-dimensional network structure, thus micro channels of the nano zeolite, which are evenly distributed, directionally interact with polysaccharide molecular characteristic functional groups. The prepared microspheres have satisfactory effects of absorbing and removing cobalt ions and nickel ions in simulation nuclear industry wastewater.

The invention relates to a process of preparing industrial high- purity water. The invention is characterized in that it comprises process of first- level hyper-filteration of pre- treated wastewater, second- level hyper-filtration, and preparation of high- purity water in continuous electric deion desalt apparatus. The advantages of this invention are: small device occupation area, low energy consumption, reduced investment, no contact of water produced in second- level hyper-filteration with air and high- quality purified water.

A method for anaerobic digestion of easily acidified wastewater (substance) to produce methane comprises the following steps: (1) directly adding the easily acidified wastewater into a fully mixed anaerobic digestion reactor as a fermentation substrate; (2) adding the inoculum into a fully mixed anaerobic digestion reactor; (3) adding granular activated carbon into a fully mix anaerobic digestionreactor; (4) carrying out anaerobic digestion reaction, and before that reaction proceeds, introducing nitrogen gas into the reactor to ensure that there is no oxygen in the system; Then at the speedof 100r/min and the temperature of 30-50 DEG C, carrying out reation. During the process of the reaction, the pH value does not need to be adjusted, and the time of anaerobic digestion is controlled to be 5-20 days. Methanogenesis of easily acidified wastewater (substance) was realized by adding granular activated carbon into digested substrate, which was produced in food processing industry, vegetable processing industry and catering industry, and then the acidified wastewater (substance) was digested.

The invention discloses a leather industry chromium-containing wastewater recycling treatment process system. The process system comprises a pretreatment system, a membrane separation system and a chromium recovery system which are sequentially communicated; the pretreatment system is used for the pretreatment of leather chromium-containing wastewater before membrane separation; the membrane separation system performs freshwater separation and chromium solution concentration treatment on the pretreated chromium-containing wastewater; and the chromium recovery system recycles chromium from a concentrated chromium solution obtained in the membrane separation system in order to obtain chromium powder with the chromium content being greater than 5%. The chromium-containing wastewater discharged from a leather tanning workshop is filtered and finely filtered by the pretreatment system, and then enters the membrane separation system composed of a nanofiltration device and an electrodialysisdevice to produce freshwater for direct reuse, obtained concentrated water undergoes electrodialysis desalination to prepare strong brine, and the remaining concentrated chromium solution enters the chromium recovery system and undergoes spray drying to obtain the chromium powder. The process system greatly saves precious water resources, and also realizes the recycling of chromium resources in order to achieve the recycling of the leather industry chromium-containing wastewater.

The invention provides efficient wastewater-treatment purifying equipment. The efficient wastewater-treatment purifying equipment comprises a machine body, and the machine body is sequentially dividedby partition plates into a mixing layer, a treatment purifying layer and a driving layer from top to bottom; a water inlet pipe is fixedly connected to the upper portion of the left surface of the machine body, a mixing pipe is arranged on the right side of the water inlet pipe, a water outlet pipe is fixedly connected to the lower portion of the mixing pipe, a chemical box is fixedly connected to the middle of the upper portion of the machine body, a motor is arranged on the lower surface of the machine body, a driving gear is fixedly connected to the upper portion of the motor through a primary rotating shaft, driven gears are arranged on the two sides of the driving gear, centrifuging drums are fixedly connected to the upper portions of the driven gears through secondary rotating shafts, active-carbon filtering nets are fixedly connected outside the centrifuging drums, and a water draining pipe is fixedly connected to the lower portion of the right surface of the machine body. According to the efficient wastewater-treatment purifying equipment, the defects in the prior art are overcome, designing is reasonable, the structure is compact, and through the mixing pipe, the centrifuging drums and the active-carbon filtering nets of a U-shaped structure, the efficient wastewater-treatment purifying capacity is achieved.

The present invention relates to a papermaking wet strengthening agent preparation method, and belongs to the field of pulping papermaking. The papermaking wet strengthening agent preparation method comprises: dissolving diethylenetriamine in water to prepare a solution with a mass percent concentration of 30%; adding adipic acid to the solution, wherein the temperature of the solution is automatically increased at this time, water volatilizes along with the temperature increase, and the solution temperature can achieve 110-120 DEG C; adding a modifier M to the obtained solution, and continuously heating under stirring to achieve a temperature of 140-180 DEG C; and finally slowly adding water to the solution so as to cool the solution to achieve a temperature of 70 DEG C to produce an intermediate polyamide polyamine, continuously adding epichlorohydrin to the intermediate solution, carrying out a reaction for about 2 h, maintaining the pH value of the reaction system at 7.5-8.5, and stopping the reaction to obtain the wet strengthening agent. The prepared modified PAE wet strengthening agent can be directly added to the pulp, provides a better enhancing effect compared with other enhancing agents, and has characteristics of low price, wastewater pollution reduction, and weakening of corrosion on papermaking equipment.