58results about "Water/sewage treatment by oxidation" patented technology

The invention discloses a method and a system for modularized combined treatment of high-difficulty organic waste water, and the treatment system comprises: a primary settling tank, an adjusting tank, a reinforced flocculation tank, a precipitation separation tank, a secondary flocculation settling tank, a buffering water tank, a pH adjusting tank, a primary honeycomb microelectrolytic tank, a flocculation settling tank, a secondary honeycomb microelectrolytic tank, an intermediate tank, a heat exchanger, a microwave catalytic oxidation device, a secondary catalytic oxidation pot, and a re-oxidation filter pipe. The treatment method adopts a combined technical scheme of a multistage honeycomb iron carbon microelectrolytic module, a reinforced flocculation module and a microwave electro-catalytic oxidation module; the invention has the characteristics of high applicability, good treatment effect, and unit modularization; the modules can be combined and cascaded freely according to the waste water condition, and thus different waste water treatment effect requirements and waste water quantity requirements are adapted; the operation cost is low; the sludge amount is low; no secondary pollution is caused; and the method is an environment-friendly high-difficulty waste water treatment method.

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.

Treated water with good water quality which can be discharged or reused is obtained by efficiently removing SS, fluorine, cyanogen, selenium, ammonia, and COD components contained in coal gasification wastewater such as gas washing wastewater generated in a coal gasification step. A method of treating coal gasification wastewater comprising steps (1) to (4), wherein the step (1) is performed prior to the step (2): (1) a fluorine removal step in which fluorine is removed by coagulation sedimentation; (2) a cyanogen decomposition step in which cyanogen is decomposed by wet oxidation or thermal hydrolysis; (3) a selenium treatment step in which selenate ions are subjected to a reduction treatment with a metal reductant; and (4) a COD/ammonia removal step in which COD and/or ammonia are/is removed.

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 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 the technical field of water treatment, and particularly relates to and discloses a treatment method for recycling high-hardness and high-salinity waste water. The treatment method comprises the following steps: (1) removing organic matters, softening and removing salt for the first time by using a primary treatment system; (2) removing organic matters, softening and removing salt for the second time by using a secondary treatment system; (3) performing evaporation and freezing crystallization treatment on concentrated liquid. According to the treatment method for recycling high-hardness and high-salinity waste water, a physical and chemical treatment and membrane integrated technology and an evaporation and freezing crystallization technology are combined, high-quality water can be recycled, the resin is softened to regenerate internal supply of an acid and alkali medicament, industrial salt is generated, resources are utilized effectively and comprehensively,long-term effective and stable operation of the system is guaranteed, and the advantages of good treatment effect, stable and reliable operation and capability of completely utilizing resources are achieved.

According to the invention, the porous carbon-coated nano zero-valent iron composite catalyst is prepared by taking a metal skeleton as a precursor, and has excellent catalytic performance in an electro-Fenton process. The synthesis method has the advantages of simplicity and convenience in operation, low equipment requirement, good product performance reproducibility and the like. Due to the synergistic effect of iron and carbon, electron transfer is accelerated, and the catalytic efficiency is remarkably improved. The iron-carbon material has strong magnetism, can be quickly separated in a magnetic field, and is convenient to recover.

A water treatment system is provided including a disinfection system, a filter and a turbine generator. A manual pump is positioned downstream of the filter to create negative pressure to draw water through the filter. The manual pump also creates positive pressure to dispense treated water from the outlet of the system. The movement of the water through the system powers the turbine generator. The power generated can be used to monitor a characteristic of the water treatment system.

The invention provides a method for removing phenol-based substances from water by using an iron-sulfur supported multi-walled carbon nano-tube reinforced persulfate, and relates to a water treatment method. A purpose of the present invention is to solve the technical defects of high cost, poor removal effect and the like of the existing method for removing phenol-based substances from water. The method comprises: 1, mixing a persulfate and pre-treated water; 2, preparing iron-sulfur supported dual-phase composite multi-walled carbon nano-tubes; 3, pouring the iron-sulfur supported dual-phase composite multi-walled carbon nano-tubes; and 4, filtering the treated water so as to complete the method. With the method of the present invention, the removal rate of the phenol-based substances in the water can achieve 87-98%, and the residual phenol-based substance in the water can be removed.

A water disinfection delivery treatment system first filters the supply by a particle and then a carbon filter. The partially treated flow is split in two and a first part passes through a first cutoff valve and is fed into a disinfection (iodine) chamber, filter or feeder via a flow restricter. The chamber output passes through a second solenoid driven cutoff valve. The second part is fed to a third cutoff valve and this valve's output is summed with the second valve's output and then fed into a holding tank. The tank retain's a volume such that the water remains therein for at least a period sufficient to permit a minimum 3 log reduction of pathogenic microbes. A final carbon filter is downstream of the tank as is a meter and dispenser. A method is also provided for delivering potable drinking water.

The process of eliminating pollutant from underground water with combined nanofiltering membrane includes the following steps: 1. pre-treatment and treating with nanofiltering membrane; 2. analyzing the quality of polluted underground water through measuring Fe and Mn content, potassium permanganate index and relative organic matter molecular weight; 3. determining whether to progress to the following steps through water quality analysis; 4. performing the combined process A or B to treat water to reach drinking water standard in condition of potassium permanganate index not lower than 2.0 mg/l, Fe less than 0.2mg/l and Mn less than 0.05 mg/l; and 5. performing the combined process C or D to treat water to reach drinking water standard in condition of potassium permanganate index not lower than 2.0 mg/l, and Fe less than 0.2mg/l and/or Mn less than 0.05 mg/l. The present invention may be applied widely in water supply of city.

The invention relates to a combined process for standard-meeting discharge of garbage percolate treatment, which takes a garbage percolate stock solution or a garbage percolate pretreated by an anaerobic regulating reservoir as a treatment object, and comprises the following steps: step one, the garbage percolate to be treated is treated by a multiple microporous carrier reaction bed film-formed with microorganisms to decompose organic substances in the garbage percolate; step two, the oxidation flocculation treatment is performed; and step three, the multistage filtration treatment is performed, the treatment fluid with CODcr less than 100mg/L is drained, and the multistage filtration comprises micro-filtration, fine filtration and reverse osmosis orderly. The process has low treatment cost, simple process, convenient equipment maintenance, strong anti-load capability, strong internal digestion power of metabolites, and small amount of sludge discharge, is suitable for garbage percolates with different concentrations and different discharge requirements, flexibly adjusts a program of process combination according to percolates, combines multiple high-efficiency single technologies, adopts different combination schemes, and ensures that the advantages of the single technology are better played.

An apparatus for the photocatalyitc oxidation of common industrial effluent contaminants in aqueous solution includes a reactor and a thin film photocatalyst fixed to a support material like Cuddapah stone. The support material is preferably an inert material. The TiO2 preformed does not contain any adsorbent for making the thin film photocatalyst, The catalytic runs were carried out over TiO2 thin film fixed bed reactor. The study is extended to the immobilization of preformed TiO2 with a binder for making thin film using a simple spray technique on inert Cuddapah stone. This method of immobilization require no thermal treatment of the catalyst at high temperatures. The method is applicable for the photocatalytic treatment of industrial effluents at a higher scale. Also it is a method for preparing a photocatalyst adopted for the oxidation of industrial common effluent by simple spray technique. Also it is a method and apparatus for destroying industrial common effluent contaminants in aqueous solution

The invention discloses application of an Mg/Fe oxide modified biochar nano composite material in removing antibiotics, the Mg/Fe oxide modified biochar nano composite material takes biochar as a matrix, and Mg/Fe oxide is loaded on the surface of the biochar; the application method comprises the following steps: mixing the Mg/Fe oxide modified biochar nano composite material with ammonium persulfate and an antibiotic solution, and reacting to complete the removal of the antibiotics. The Mg/Fe oxide modified biochar nano composite material has the advantages of low price, high efficiency, large-scale production, high adsorption capacity, capability of quickly realizing solid-liquid separation, environmental friendliness and the like, is applied to activating persulfate to degrade antibiotic pollution in a water body, and is good in removal effect and high in reaction speed.

The invention discloses a sewage treatment powder agent preparation method, which includes the following specific steps: (1) weighing the following components in parts by weight: 50-55 parts of zeolite, 4-8 parts of polyferric chloride, 12-16 parts of sodium polyacrylate, 6-8 parts of polydimethyldiallylammonium chloride, 12-16 parts of aluminum potassium sulfate, 3-7 parts of manganese dioxide and 5-9 parts of copper chloride; and (2) calcining the zeolite at 800-850 DEG C for 1-3 hours under the protection of nitrogen and pulverizing to obtain zeolite powder; adding the polyferric chloride,the sodium polyacrylate and the polydimethyldiallylammonium chloride into water to prepare a solution, spraying the solution into the zeolite powder, air-drying at 35-50 DEG C, and grinding into a powder material again. The method has the advantages of high sewage treatment efficiency, low sewage treatment cost and easily available raw materials.

The invention relates to an air source ozone injection type multi-pipeline jet flow aeration water body aerator (vessel), which belongs to the field of the application study of a water body disinfection aerating technique for environmentally-friendly water treatment and aquiculture, and is characterized by comprising four parts of a power supply, a water pump, a multi-path water jet flow output pipe connected with the water pump, and a water jet flow gas-water mixed type aerator which is connected with the water jet flow output pipes and uses a multi-path ozone gas generator as gas sources. Asthe first choice, the aerator is arranged on a vessel to work during advancing as the conventional aerating vessel, and also can be used as fixed water treatment equipment. The aerator has the following advantages that: the aerator uses the ozone gas source to replace the air source so as to greatly improve the capacity of oxidizing and degrading toxic substances in the air, has strong functionsof oxidizing, degrading, killing and controlling biological pollutants of various chemical extremely-toxic substances, various poisonous heavy metals, various bacteria, viruses and mold fungi and thelike, can ensure the achieving of the aim of the invention and reach high cost performance, and is favorable for popularization and application.

The invention provides an industrial water recycling and reusing device which comprises a regulating tank, a settling tank, a water storing tank, a first grid, a second grid, biological films, a sludge pump, an ultraviolet lamp, a filter screen, a filer film and an ozone machine .The first grid is installed at the upper end of the regulating tank, the second grid is assembled under the first grid, and the biological films are assembled on a support plate; a sludge port is formed in the bottom of the settling tank, the sludge pump is installed at the lower end of the sludge port, and a sludge output pipe is assembled on the upper portion of the sludge pump; the ultraviolet lamp is installed at the top of the water storing tank, the filter screen is assembled in the water storing tank, and the filter film is assembled at the lower end of the filter screen; an ozone inlet is formed in the bottom of the water storing tank, and the ozone machine is installed under the ozone inlet .According to the industrial water recycling and reusing device, the industrial water recycling and reusing functions are effectively achieved, purifying treatment is conveniently conducted on sewage, the sewage treatment effect is improved, water is saved, and the water resource using efficiency is improved.

The invention belongs to the field of domestic sewage treatment, and particularly relates to an ozone-assisted photocatalytic sterilization device, which comprises an ozone generation system, a first control valve, a gas flow meter, a filter, a liquid flow meter, a second control valve, a jet flow mixing device and a photocatalytic reactor, wherein the ozone generation system is connected with the gas flow meter through the first control valve; the filter is connected with the liquid flow meter through the second control valve; the jet flow mixing device is provided with a gas inlet, a liquid inlet and an outlet; the gas flow meter is connected with the gas inlet of the jet flow mixing device; the liquid flow meter is connected with the liquid inlet of the jet flow mixing device; the outlet of the jet flow mixing device is connected with the photocatalytic reactor. The device has the beneficial effects that a process flow is simple, the device is easy to operate, and has good sterilization and disinfection effects, and the treatment cost is effectively lowered.