41results about How to "Reduce chemical oxygen demand" patented technology

The electrical raw oil desalting and dewatering device for petrochemical industry features its direct material feeding in strong electric field and horizontal flow of raw oil. The electrical raw oildesalting and dewatering device of the present invention has material distributor and strong electric field coalescence area in tank axial direction and oil outlet pipe in the top of the raw oil purifying area, with the strong electric field coalescence area being provided with at least two layers of parallel electrode plates parallel to or perpendicular to the tank axis. The material distributor is provided with nozzles to spray mixed oil-water material into the strong electric field between two adjacent electrode plates. Between the strong electric field coalescence area and the purified raw oil outlet, deposit separating area may be set.

The invention discloses a net membrane with oily sewage purification capability and a preparation method and application thereof. The oily sewage purification net membrane is an A/B double-layer composite net membrane, wherein the A layer of net membrane is formed by depositing a TiO2 coating on the net wire surface of a fabric net; and the B layer of net membrane is arranged on the surface of the A layer of net membrane and provided with a photodegradable hydrophobic modifier layer. The oily sewage purification net membrane can be used for simultaneously implementing oil-water separation of oily sewage and degradation of soluble pollutants. The net membrane has super-hydrophobic and super-oleophyllic properties in air, the contact angle between the net membrane and water in the air is more than 150 degrees, and the net membrane has good photo-catalytic property under ultraviolet. The net membrane can be applied to purification, chemical separation, environmental protection and the like of the oily sewage. The net membrane for sewage purification has the advantages of good separation effect, high purification efficiency, low cost, low energy consumption, convenience and the like.

The present invention is one electric raw oil desalting and dewatering apparatus for petrochemical industry. The present invention features the direct material feeding under strong electric field and the horizontal flow of raw oil. The electric raw oil desalting and dewatering apparatus has a tank with oil-water mixture inlet, axial strong electric field coagulation area with at least two layers of parallel planar electrode plates perpendicular to the axis of the tank, purified raw oil outlet with oil outlet pipe, material distributor inside the tank with nozzles to jet oil-water mixture into the strong electric fields between every two adjacent electrode plates, and depositing separation area set between the strong electric field coagulation area and the purified raw oil outlet.

The invention relates to a method of desulphurization of the waste water and the absorption tower. Its desulphurization method includes: 1) printing waste water pretreatment; 2) the desulphurization about the printing waste water sprays; 3) doctor solution output and so on main steps. The absorption tower contains a tower body, an air outlet on the top of the tower body. The drawing fan is on the outside of the air outlet. The tower in vivo upper side equipped with two defogging levels with two spray levels below. The tower body breast is equipped with the smoke mouth; the tower body base is equipped with the overflow gate. The merit of the invention is that with the printing waste water removing haze in SO2, not only can meet the emission standards, but also can save the sulfuric acid in the printing waste water. Also it can largely reduce chemistry oxygen consumption, which is advantageous in further processing in water disposal plant, and makes the waste water and the waste gas under the comprehensive program of public order. The invention greatly reduces the anti-pollution cost, promotes the business economic benefit, promotes enterprise to implement the waste water and gas governing.

The invention relates to a treatment method for sewage. Wherein, keeping the sewage flowing from lower to upper during the whole process; first, taking denitrifying treatment in hypoxia segment to remove total nitrogen and phosphorus; then, treating in aerobic segment to reduce the COD, BOD5 and SS as well as the ammonia nitrogen by nitration. Besides, the opposite equipment is a vertical-arranged bioaeration filter tank with an aeration pipe on proper position.

The invention provides a composite paper making pulp substrate and a manufacturing method of the composite paper making pulp substrate. The composite paper making pulp substrate comprises, by weight, 30% to 60% of a surface layer, 20% to 60% of a core layer and 10% to 20% of a bottom layer. The surface layer is made of bamboo fibers and/or cane syrup fibers, the core layer is made of the bamboo fibers or the cane syrup fibers or coal residues or a mixture of the bamboo fibers, the cane syrup fibers and the coal residues, and the bottom layer is made of the bamboo fibers and/or the cane syrup fibers. The manufacturing method includes the steps of repulping, pulp mixing, high concentration desanding, low concentration desanding, pressure screening, slushing, composite paper making, drying and the like. The composite paper making pulp substrate and the manufacturing method have the advantages that the pulp substrate is formed by waste generated through bamboo product processing and food processing and the coal residues discharged by fire coal; when being used as a filtering material, the composite paper making pulp substrate has the good filtering effect on water suspended matter and particulate mater, and can remove organic matter particles and insoluble inorganic matter impurities and reduce the effect of chemical oxygen consumption; no waste water is drained in the process steps, and required water can be recycled.

A process for removing nitrite and ammoniacal nitrogen in aquatic products cultivation includes loading H2O2 into an open container, enclosing the container by an osmotic film, attaching the container to an oxygen-enriching machine in water of pond, turning on the machine for slowly diffusing the H2O2 to decompose it into H2O and O2, oxidizing the nitrite and ammoniacal nitrogen to become nitrate by said O2, and adding photosynthesizing bacteria to absorb the nitrate.

The invention belongs to the technical field of chemical tin plating, and in particular, relates to chemical tin plating liquid and a preparation method thereof. The chemical tin plating liquid contains sulfuric acid, tin salt, complexing agents, multifunctional additives, reducing agents and function auxiliaries; and in the chemical tin plating liquid, the content of the sulfuric acid is 33-40 mL.L-1, the content of the tin salt is 10-15 g.L-1, the content of the complexing agents is 85-95 g.L-1, the content of the multifunctional additives is 0.5-1.2 g.L-1, the content of the reducing agentsis 25-40 g.L-1, and the content of the function auxiliaries is 1-2 g.L-1. The chemical tin plating liquid is excellent in stability, and accelerates the plating layer deposition speed when the stability of the plating liquid is improved.

The invention relates to a microbial preparation for brackish water aquaculture, which comprises the following components in parts by weight: 20-25 parts of Bacillus subtilis, 10-20 parts of Bacillus megaterium, 20-25 parts of microzyme, 30-35 parts of Acinetobacter and 100-200 parts of carrier. The preparation method comprises the following steps: sequentially inoculating Bacillus subtilis, Bacillus megaterium, microzyme and Acinetobacter seed culture solutions into a culture medium, fermenting, and mixing the obtained bacterium solution with the carrier substance to obtain the microbial preparation. The microbial preparation is applicable to a culture water body with the salinity range of 0.2-1%. The microbial preparation can obviously improve the water quality of the brackish water aquaculture water body, especially obviously lowers the nitrite content in the water body, and can enhance the flesh texture of the cultured animals.

The invention relates to the field of wastewater treatment, and in particular, relates to a biological treatment system for removing pollutants in flue gas desulfurization wastewater, wherein the system comprises a pretreatment unit, a biological treatment unit, a post-treatment unit and a sludge treatment unit; firstly, the desulfurization wastewater is umped to the pretreatment unit for pretreatment through a high-efficiency flocculation coupling softening process; the pretreated water is pumped to a first-stage facultative/second-stage facultative/anaerobic/aerobic biofilm reactor of the biological treatment unit, selenium, ammonia nitrogen and sulfate in the desulfurization wastewater are removed, COD is degraded, biological produced water is discharged into the post-treatment unit foradsorption and interception, biological treatment residues are removed, and up-to-standard discharge is achieved; slurry generated by the process system is completely collected to the sludge treatment unit for treatment. According to the biological treatment system, on the basis of efficient flocculation pretreatment, selenium, ammonia nitrogen and sulfate in the flue gas desulfurization wastewater can be effectively removed through biological treatment and the COD can be effectively degraded through biological treatment, so that the wastewater is discharged after reaching the standard, and no pollution is caused to the environment.

The invention discloses a biological dilution technique for organic sewage. The organic sewage with a higher chemical oxygen consumption concentration content and a higher biochemical oxygen demand concentration content and city organic sewage with a higher chemical oxygen consumption concentration content and a lower biochemical oxygen demand concentration content are mixed and uniformly stirred so that the chemical oxygen consumption of mixed organic sewage is 7000ml/L and the biochemical oxygen demand is 8000ml/L, and shewanella putrefaciens is added for culture. Through the adoption of the biological dilution technique disclosed by the invention, the chemical oxygen consumption concentration content and the biochemical oxygen demand concentration content in the organic sewage can be effectively reduced, and the shewanella putrefaciens is used for deep reduction, so that the operation is simple and convenient, and the effect is good.

The invention relates to a method for treating methylene blue wastewater. The method comprises the steps of adding tannin and metal magnesium ions into the methylene blue wastewater, mixing, adding magnetic powder and a flocculating agent so as to form a magnetic flocculate under an alkali condition, and carrying out magnetic separation on the magnetic flocculate by virtue of a magnet, so as to realize the purification of the methylene blue wastewater. The method has the beneficial effects that the operation is simple, the decoloration effect is remarkable, soluble organic dyes in dye wastewater can be effectively removed, and chemical oxygen consumption in water is reduced; and the operation cost is low, the treatment cycle is short, the efficiency is high, the process is simple, no secondary pollution after flocculation, and the method is easy to popularize.

The invention provides a beer wastewater treatment method. The beer wastewater treatment method comprises the following steps that 1, pretreatment is conducted, wherein screening is conducted by usinggrids; 2, sedimentation treatment is conducted, wherein after screening, a hectorite compound treatment agent with the mass being 0.05-0.1% of the mass of beer wastewater is added into the beer wastewater, and stirring is conducted; 3, according to the difference between an aerobic treatment way and an anaerobic treatment way, aerobic bacteria and anaerobic bacteria are added for treatment; 4, furfural is added, polyvinylpyrrolidone is added too, filtration is conducted to obtain filter residues and filter liquor, and the filter liquor is treated wastewater. The reasonable treatment method isadopted, the large-size organic matter, which is difficult to degrade, in the beer wastewater is effectively reduced, the organic matter is hydrolyzed into simple organic matter which is easy to degrade, the SS content in the wastewater is greatly reduced, the removal rate of BODs and CODs in the treated wastewater is high, and the treated wastewater reaches specified emission standards.

The invention discloses a water quality improvement agent for freshwater aquaculture ponds and a preparation method thereof, and belongs to the field of water quality regulation of aquaculture ponds.The modifier is prepared from potato dry residue, sodium humate, zeolite powder, sodium carboxymethyl cellulose, and inorganic nutrient salts. The effect of the improver is remarkable and lasting, andthe water quality of the freshwater aquaculture pond can be effectively controlled during the high temperature breeding season, and the healthy and sustainable development of the freshwater aquaculture industry is promoted. The improvement agent is easy to manufacture and simple to operate, and can be used for large-scale industrial production.

A clarifying agent for depositing proten, starch and other impurities is prepared from aluminium sulfate, alum, calcium carbonate, caroxymethyl cellulose sodium, sodium hydrogen sulfite and VC.

The invention discloses disinfection equipment suitable for a small medical institution. The disinfection equipment comprises a device body and an ozone generation area arranged in the device body, wherein a water inlet is formed in one side of the device body, one end of the water inlet is connected with a first peristaltic pump, one end of the first peristaltic pump is connected with a first sewage bucket, one side of the first sewage bucket is connected with a magnetic pump, one side of the magnetic pump is connected with a second sewage bucket through a pipeline, and the second sewage bucket is connected with a discharge port through a pipeline; one side of the magnetic pump is connected with a chemical barrel through a pipeline, and the outlet end of the second sewage barrel is connected with an ozone generation area through a self-priming pump; a reaction chamber and a pure water storage barrel are arranged in the ozone generation area, the pure water storage barrel is connected to the reaction chamber through a pipeline, and an ozone generator is arranged at the bottom of the reaction chamber.

The invention relates to a silicon-free softening agent and a preparation method thereof. The softening agent is prepared from, by weight, 40-60 parts of beef tallow, 10-20 parts of stearic acid, 6-14parts of diethylenetriamine, 6-10 parts of diethyl sulfate, 4-10 parts of isopropyl alcohol, 3-7 parts of modified polyvinyl alcohol and 1-5 parts of sodium lauryl sulfate. By polyvinyl alcohol modification, polyvinyl alcohol can be better applied to the field of textile auxiliary agents to remarkably improve performances of the silicon-free softening agent, and fabrics using the softening agenthave advantages of high hydrophilicity, freeness of stuffiness in wearing of clothes, fluffiness, softness, freeness of oiliness, closeness to human skin and nature, and the like. In addition, the chemical oxygen demand and the biochemical oxygen demand of sewage can be reduced, and biodegradation of organic silicon macromolecules is reduced.

The invention relates to a treatment method of beer brewing wastewater. The treatment method comprises the following steps: (1) adjusting the pH of the beer brewing wastewater to be neutral; (2) adding silica gel into the beer brewing wastewater, wherein the weight of silica gel is 4.0-4.5wt% of the beer brewing wastewater, and slightly stirring for 1-2 hours after addition; (3) after stirring, filtering the beer brewing wastewater and filtering to obtain a beer brewing wastewater filtrate; (4) after filtering, enabling the beer brewing wastewater filtrate to pass through a ceramic membrane, wherein the molecular weight of the ceramic membrane is 3000, collecting permeate; and (5) enabling the permeate to pass through the ceramic membrane with the molecular weight of 300, and collecting the permeate to obtain the treated beer brewing wastewater. The BOD (Biochemical Oxygen Demand) value of the treated beer brewing wastewater is reduced from 523mg/L to 22mg/L-27mg/L and the CODcr (Chemical Oxygen Demand) value is reduced from 498mg/L to 17mg/L-20mg/L.