773 results about "Water pollutants" patented technology

The invention supplies a new type adsorbent--mixed oxide of iron and manganese / diatomite preparation, use and regeneration method, belongs to the treatment of technology. The method used the soluble ferrous permanganate and salt as raw materials, respectively prepared the solutions, after adequate lye into permanganate solution, mixed two salt solutions, by adding diatomite particles, full oscillation, standing aging, neutralize, washing and drying to get the manganese oxide / silicon algae absorbent. The adsorbent is larger than the surface area and good adsorption properties can be used to remove arsenic in water pollutants (especially tervalence arsenic), and the adsorption surface activity of the saturated absorption of pollutants can be directly passed to load manganese oxide compound to regeneration.

The invention relates to a magnetic nano cerium dioxide ozone catalyst, which comprises nano ferroferric oxide core, an silica interface layer wrapped the nano ferroferric oxide core and a cerium dioxide active ingredient loaded on the silica interface layer; in the magnetic nano cerium dioxide ozone catalyst, the mass ratio of ferroferric oxide to silica to cerium dioxide is 1: 0.3-0.8: 3-5. The invention also discloses a preparation method and an application of the cerium dioxide ozone catalyst in the process of ozone catalysis and organic waste water degradation. The magnetic nano cerium dioxide ozone catalyst can rapidly degrade the organic pollutant in waste water, and is easy to magnetically recovery, and the magnetic nano cerium dioxide ozone catalyst has good continuous usability and low metal ion leaching rate, and provides a rapid and effective processing method for enhancing ozone technology, removing organic waste water pollutant and industrial application.

The invention relates to a way to remove the pollutant in water by water treatment chemical together with the microray. It is a kind of water treating method which solved the problem of long reacting time and large dosage of oxide in treating the water pollutant. It's realized by the following steps: (1)determine the content of the pollutant; (2) the ratio of the water treatment chemical to the pollutant is 1-10:1; (3) adjust the Ph value of the water; (4) treat the polluted water with water treatment chemical as well as microray; (5) separate the solid substance from water to get purified water. Compared to the traditional method, the dosage of the oxide is 30% less in the invention, the removal rate of ammonia nitrogen is 10-60% higher in the invention than the treatment with only ferri-salt; the degradation rate of the natural organic humic acid has been increased by 20-40%; the hard-to-degrade organics (such as nitrobenzene) removal rate has been increased by 30-50%; the invention has many advantages such as low cost and reliable operation it has extensive applying prospect in water treatment domain.

The invention discloses a composite photoelectric catalyst as well as preparation and applications. A graphene thin film layer is deposited on the outer surface of a titanium oxide nanotube array and the opening of a nanotube array, and semiconductor nanoparticles are deposited on the surface of the graphene thin film layer and the inner surface of the nanotubes of the titanium oxide nanotube array. The catalyst has an excellent performance in the aspect of treating water pollutants.

The invention discloses a method for high-efficiency combined treatment of printing and dyeing wastewater, which belongs to the field of the organic wastewater treatment. The method comprises the following steps: pumping printing and dyeing wastewater to a hydrolysis pool for hydrolysis and acidification treatments; pumping the wastewater to an A/O (PACT) bioaugmentation reaction tank for biological treatment after hydrolysis and acidification treatments; subjecting the biologically-treated wastewater to the coagulation sedimentation; filtering after the coagulation sedimentation; and discharging. With the treatment method, the water quality of the effluent can meet the strictest effluent discharge standard of China, 'Discharge Standard of Main Water Pollutants for Municipal Wastewater Treatment Plant and Key Industries of Taihu Area' (DB32/T1072-2007). The method has the advantages of less occupied area, low sludge discharge, stable treatment effect and low running cost; achieves the effect of efficient treatment of printing and dyeing wastewater, and overcomes the problem of high-efficiency treatment of printing and dyeing wastewater in the prior art.

The invention discloses a treatment method and system of nickel-containing wastewater conforming to Water Pollutant Table III Discharge Standard. The method comprises the following steps: sending nickel-containing wastewater into a wastewater collecting tank, and pumping into a nickel reaction tank by a water pump to perform pretreatment; regulating the pH value, adding a heavy metal capturing agent, thoroughly mixing to react, adding a coagulant aid and a flocculant, sufficiently and uniformly stirring, and standing to precipitate or sending into a solid-liquid separation device; sending into an intermediate water tank, and adding a sulfuric acid solution to regulate the pH value to 7-8; and pumping water in the intermediate water tank into a heavy metal scavenger by a filtering machine, and treating to achieve the Table III Limit Discharge Standard. The method and system solve the problem that the existing nickel-containing wastewater in electroplating industry can not satisfy the Table III Discharge Standard in Water Pollutant Special Limits, so that the electroplating nickel-containing wastewater can stably satisfy the discharge requirements.

The invention provides a method for treating livestock and poultry breeding waste water. The method mainly comprises the following steps of solid-liquid separation treatment, efficient nitrogen-phosphorus biochemical circulation treatment, modified oxidation ditch treatment, sludge reflux treatment, filtration and sterilization treatment and the like. The invention aims to provide the method for treating the livestock and poultry breeding waste water, which is high in capability of removing ammonia nitrogen, total nitrogen and total phosphorus and low in investment cost and running cost, and is easier to manage. The waste water treated by adopting the method provided by the invention can meet the requirement of the national Discharge standard of water pollutants for livestock and poultry breeding GB18596-2001; not only can the up-to-standard discharge requirement in the waste water treatment of the livestock and poultry breeding industry be effectively met, but also the difficult problem of removing the ammonia nitrogen while an organic matter is degraded is also solved; and the method is suitable for the waste water treatment of breeding farms on different breeding scales, similarly, is also suitable for the treatment of municipal domestic waste water and waste water with a high COD (chemical oxygen demand) or high ammonia nitrogen characteristic, and is wide in application prospect.

A method for evaluating underground water pollution source intensity comprises the steps of determining pollution source characteristic indexes according to underground water pollutant types, characteristics and positions and the like; determining vadose zone characteristic indexes according to vadose zone mediums, underground water depth and permeability coefficient and the like; determining an underground water pollution source intensity evaluation index system in combination with pollution source characteristic indexes and vadose zone characteristic indexes; causing the system to analyze underground water pollution source intensity evaluation indexes, establishing a hierarchical structure matrix, and utilizing an analytic hierarchy process to perform weight assignment on the underground water pollution source intensity evaluation indexes; establishing an underground water pollution source intensity grading evaluation method, and evaluating the underground water pollution source intensity. According to the evaluating method, pollution source characteristics and vadose zone characteristics are considered comprehensively, the underground water pollution source intensity is reflected accurately, underground water is protected; the scientific basis can be provided, and the underground water protection and management are more scientific and more rational.

The invention discloses a method for treating recycled printing and dyeing sewage, which is applicable to the treatment and reutilization of sewage of printing and dyeing of fabrics such as wool fabrics, silk fabrics, cotton, linen, chemical fiber fabrics and the like. The method aims to overcome the disadvantages of sewage treatment of the prior printing and dyeing mills and ensure that the sewage reaches the national discharge standard of water pollutants for dyeing and finishing. The method adopts treatment technology of physicochemical-biochemical, precipitation and filtration, which comprises the following process flow: the sewage, a collecting basin, an anaerobic tank, an aerobic tan, a dosing tank, a sedimentation tank, a filter tank, and the discharge or recycling of water which achieves the standard. In addition, complex enzyme is also added; the complex enzyme has a catalytic function, and can strengthen the activation of microorganisms; the method has good treatment effect on the sewage; and the adding of the complex enzyme can strengthen the activity of the microorganisms, improve the effect of sewage treatment, can also save electric energy, reduce the loss of medicaments, and save the cost. The sewage is recycled after the filtration through a microstrainer, which saves the resource, reduces the cost once again, and truly achieves the aims of energy conservation and discharge reduction.

The invention discloses a method for detecting water pollutant biotoxicity by paper-based micro-fluidic chip anode current. The method is characterized in that a paper-based micro-fluidic chip is prepared and then water pollutant biotoxicity is determined by the paper-based micro-fluidic chip. According to a microbial respiratory chain-based BQ system electrochemical detection principle, on the paper-based micro-fluidic chip of a screen printing PDMS hydrophilic microchannel and carbon paste three-electrode system, a steam trap of the hydrophilic microchannel is dredged by a small piece of a cellulose membrane so that liquid flow release time and flowing time are controlled and separation and cleaning of a nutrient solution and cells and cell incubation by pollutants are realized and thus the interference produced by current signal detection device anode current-based quantitative determination of pollutant toxicity is reduced. The method has the advantages of light quality, carrying convenience, low cost, one-step analysis, small sample volume and fast analysis speed and is suitable for biotoxicity detection in occasions of a remote area, field on-site water pollution, soil pollution, food safety and space carrying.

The invention discloses a method for processing effluent by two-stage electrolysis and a device thereof. The invention is characterized in that a first electrolytic tank and a second electrolytic tank are respectively arranged; in the first electrolytic tank, a positive electrode is made of titanium mesh plated with ruthenium and a negative electrode is made of stainless steel mesh; in the second electrolytic tank, a positive electrode is made of aluminum mesh and a negative electrode is made of stainless steel mesh; working power supply of the two electrolytic tanks is pulsed DC power supply; at first, electrolytic oxidation or reduction reaction is carried out on the effluent to be processed in the first electrolytic tank; then the effluent is injected into the second electrolytic tank for condensation processing suspended substance and colloid in the water; meanwhile, micro-bubbles generated at the positive electrode and the negative electrode in both the first electrolytic tank and the second electrolytic tank, capture and adhere impurity particles and organic matter in the water and bring them to the water surface. The invention separates the impurity particles and the organic matter in the water by means of electrolytic flotation, which greatly improves the efficiency of processing water pollutants by electrolysis.

The invention discloses a treatment method for wastewater containing high-concentration organic phosphorus against the wastewater produced by a water treatment agent enterprise, which contains dozens of organic phosphorus scale inhibitors and corrosion inhibitors. Outlet water can stably achieve the requirements of a water pollutant comprehensive emission standard through the following design: the wastewater with high-concentration organic phosphorus firstly passes through 'a coagulation and sedimentation tank 1, a fenton oxidation tank and a coagulation and sedimentation tank 2' for pretreatment, further enters 'anaerobic, anoxic, aerobic and sedimentation tank' biochemical treatment systems and finally passes through 'coagulation and sedimentation tank 3, biological activated carbon powder tank, sedimentation tank, reverse mineral sand filter tank and clear water tank' post-treatment systems. The treatment method disclosed by the invention solves the industrial difficult problem that the treatment of the wastewater containing high-concentration organic phosphorus, which has complex components and high content of organic phosphorus, does not achieve the standard; furthermore, the treatment effect of the method is stable, and the operation cost is economic and reasonable; and in addition, a precipitate taking calcium phosphate as a main component, which is produced in the coagulation and sedimentation tank, can be sent into a phosphate fertilizer plant as a raw material for producing a phosphate fertilizer.

The invention belongs to the technical field of membrane engineering and relates to a monovalent salt mixed solution nanofiltration separation method. Besides, the invention also relates to a pigment wastewater desalinating and recycling method. The monovalent salt mixed solution nanofiltration separation method successfully achieves separation of CH3COO- and Cl- in solution through nanofiltration membranes and has the advantage of being good in separating effects. The monovalent salt mixed solution nanofiltration separation method can achieve treatment and recycling of pigment wastewater. The pigment wastewater is processed through decoloration, solid-liquid separation, adsorption and oxidation, then the pH of the processed pigment wastewater is regulated to be alkaline, the reacted water is processed through ultrafiltration membranes, ultrafiltration membrane concentrate water returns to a pH regulating tank, and fresh water flows into the nanofiltration membranes for treatment; fresh water processed through the nanofiltration membranes enters reverse osmosis membranes, and produced concentrate water are concentrated for recycling; reverse osmosis membrane concentrate water enters an electrodialyzer, electrodialytic fresh water flows back and serves as reverse osmosis membrane inflow water, electrodialytic concentrate water is evaporated in an evaporator, solid obtained from evaporation and concentration can serve as industrial salt; the entire separation process has no water pollutant discharge.

The invention discloses a method for processing agricultural running water pollution by utilizing bank and a compound system for processing running water pollution. A multi-level infiltration bed is constructed at the lower end of an agricultural running water converging channel along the bank from top to bottom, and consists of aquatic plants at the upper part and fillers at the lower part, a sand settling-buffering tank is arranged in front of each level of infiltration bed for settling sand, after the sand settling process, running water enters the infiltration bed for infiltration process, and the running water processed by a multi-level sand settling-infiltrating system is finally discharged into soil or water body by a water outlet area at the tail part of the system. In the invention, the bank is fully utilized for buffering water flow impact, water inlet quality is homogenized, and the purifying effect of running water pollutant is improved. Besides the traditional advantages of simple construction, convenience in operation and management, low cost and the like, the invention also has the advantages of no energy consumption, difficult blockage, small investment, convenience in operation and management, and strong anti-impact and anti-load capability.

The invention discloses a system and a method for treating the high-concentration landfill leachate in an aerobic composting site. The system comprises a hydraulic screen, a regulation pool, an anoxic and anaerobic pool, an upflow anaerobic pool, an anoxic pool, a first aerobic pool, a second aerobic pool, a secondary sedimentation pools, an immobilized microorganism aerating biological filtering pool, an MBR (membrane biological reaction) pool, a nanofiltration system, a decolourising pool and a charcoal canister which are connected in sequence. The raw landfill leachate is treated by the hydraulic screen, the regulation pool, the anoxic and anaerobic pool, the upflow anaerobic pool, the anoxic pool, the first aerobic pool, the second aerobic pool, the secondary sedimentation pools, the immobilized microorganism aerating biological filtering pool, the MBR pool, the nanofiltration system, the decolourising pool and the charcoal canister of the system in sequence so that the effluent can be recovered. The effluent can meet the requirement for the limit of the discharge concentration of the water pollutant in the special region in the Domestic Waste Landfill Site Pollution Control Standard GB16889-2008.

A heterojunction composite material consisting of one-dimensional In₂O₃ hollow nanotube and two-dimensional ZnFe₂O₄ nanosheets and its application are disclosed. When using this material for catalytic reactions, the hollow cavity and two-dimensional nanosheets of hollow nanomaterials can not only reduce the migration distance to accelerate the electron-hole separation, but also provide a large surface area and rich active sites to promote pollution adsorption and surface catalysis. At the same time, multiple light scattering or reflection in the hollow cavity of the hollow nanomaterials can increase light absorption and utilization. In addition, the heterojunction photocatalyst constructed by growing two-dimensional semiconductor nanosheets on a tubular substrate can promote the effective separation of photogenerated electrons and photogenerated holes, thereby improving the catalytic efficiency. In terms of catalytic performance, In₂O₃ @ ZnFe₂O₄ shows effective degradation of tetracycline, and due to its ferromagnetism, it shows convenient and good separation effect and has good recycling performance.

The invention discloses an intelligent measurement method for the total emission of the water pollutants. In a sampling period Delta t ranging from 5 minutes to 30 minutes, sewage is continuously and automatically sampled in regular time and uniformly mixed according to flux Qi; 24 hours (or 48 hours) are taken as an analysis period Delta T, the consistency of the pollutants is detected by a pollutant online measurement instrument as shown in formula (III), and the total emission of the pollutants in the analysis period can be worked out as shown in formula (I) and formula (II). The intelligent measurement method of the invention can improve the real-time of sampling and the science and accuracy of the monitoring result, can reduce the detection times of relative indexes, and effectively reduce the monitoring cost. When the intelligent measurement method of the invention is used for improving the existing pollutant total quantity monitoring system, the problems of overproof emission by stealth, excessive emission, and unscientific calculation of the total emission of the enterprise pollutants, etc., which exist in some current enterprises can be solved, and the environmental protection monitoring and the law enforcement level can be effectively improved.

The invention relates to a TiO2 fiber supporting CdS and MoS2 and a preparation method thereof. The preparation method includes the steps of: preparing fibrous TiO2 fibers through high voltage electrostatic spinning; supporting the CdS through a hydrothermal method to form CdS nano particles, which are very small in size, on the surface of the fibers; and supporting sheet MoS2 through the hydrothermal method to finally preparing the TiO2 nano fiber supporting CdS and MoS2. The method is simple and the product is homogeneous and stable and is easy to separate and recycle from the reaction system. The TiO2 fiber supporting CdS and MoS2 can be applied in the fields of photo-catalytic water pollutant degradation, hydrogen producing, electro-catalysis, and sensors.

The invention discloses an early warning device for identifying sudden water pollution based on a biotic pollution module. The early warning device comprises a biotic population placing unit (1), a biotic population monitoring unit and an alarming unit (27). The biotic population placing unit is a group of parallel module type series-connection water tanks; the biotic population monitoring unit comprises three sets of independent devices, namely a fish monitoring device, a demersal invertebrate monitoring device and a protist monitoring device. The invention further provides a method for identifying the sudden water pollution based on the biotic pollution module in a quantitative mode. The early warning device and method for identifying the sudden water pollution based on the biotic pollution module overcome the defects that an existing water quality biology early warning technology can only early warn whether water pollution exists or not in a qualitative mode, but cannot early warn the severity of water pollution in a quantitative mode. The early warning device and method for identifying the sudden water pollution based on the biotic pollution module meanwhile overcome the defects that the existing water quality biology early warning technology can only early warn limited varieties of pollutants, but cannot meanwhile early warn various water pollutants. Thus, the monitoring range is wider, sensitivity is higher and accuracy is better.

The invention relates to a preparation and application method of a polyvinyl chloride (PVC) resin terminator, belonging to the technical field of chemical products. The invention particularly relates to a liquid antioxidant product, which mainly comprises 2,6-di-bert-butyl-4-(1-phenylethyl)phenol and is obtained by carrying out catalytic alkylation reaction on 2,6-di-bert-butyl phenol and styrene as raw materials. An organic solvent is added into the liquid antioxidant product which mainly comprises the 2,6-di-bert-butyl-4-(1-phenylethyl)phenol, and is sufficiently stirred to obtain the liquid antioxidant product HKY-10. The HKY-10 is compounded with a benzofuran ketone antioxidant and a phosphite ester antioxidant to obtain an oil-soluble compound liquid terminator product as a terminator for a general-purpose PVC resin product preparation process by a suspension method; and the liquid terminator is added in a polymerization reaction process to obtain a PVC resin product with stable properties, thereby enhancing the aging whiteness of the PVC resin product. The PVC resin terminator has the characteristics of no toxicity and environmental protection, and does not generate water pollutants.