42results about How to "Achieve zero discharge treatment" patented technology

The invention relates to a comprehensive treating method for high-salt-content wastewater. The comprehensive treating method comprises the following steps: (1) pre-treatment: adding a salt-tolerant bacterial agent and a growth promoter into an existing membrane bioreactor; (2) coagulation and sedimentation: carrying out coagulation and sedimentation by using a lime-soda ash softening process; (3)reduction treatment: subjecting the settled wastewater to reduction treatment in virtue of reverse osmosis; (4) biochemical treatment: adding the salt-tolerant microbial agent and the growth promoterused in the step (1); (5) concentration treatment; and (6) crystallization treatment. Compared with the prior art, the treating method of the invention achieves efficient removal of pollutants such asCOD and total nitrogen by using the salt-tolerant microbial agent and the growth promoter in the membrane bioreactor and a biochemical treatment system, and can effectively reduce membrane contamination, prolong the service life of membranes and ensure the stable operation of the system.

The invention relates to a zero-discharge treatment process for industrial cleaning wastewater, belonging to the technical field of water treatment. In order to solve the problem that there is no better treatment method for a large amount of waste water generated during the process of removing pollutants and self-oxides on the surface of silicon wafers, the invention discloses a treatment method for cleaning waste liquid. On the one hand, the method can effectively recover solids such as silicon powder, and on the other hand, can effectively recycle the active components in the cleaning solution, and at the same time, can also achieve the effect of zero discharge of the entire cleaning solution.

The invention provides a method for preparing NaCl industrial salt with desulphurization waste water zero discharge. First, suspensions and colloids in desulphurization waste water are aggregated into large particles and precipitate, then the waste water without suspensions and colloids is evaporated, during the initial period of evaporation, seed crystals are added into the waste water, thus substances easy to scale are precipitated, the precipitated substances easy to scale are discharged, the residual solution system is subjected to condensation, crystallization, dehydration and drying, and NaCl industrial salt with a high purity is obtained. Through a mode of addition of seed crystals, the substances easy to scale in the waste water are precipitated with the seed crystals as crystal nucleuses firstly, then the precipitated substances easy to scale are discharged, the impurity ion content in the waste water system is lowered, the waste water hardness is lowered effectively, scaling on inner surfaces of a waste water processing device can be avoided effectively, and finally production of NaCl industrial salt products with a high purity can be achieved.

The invention discloses a method for treating landfill leachate by using biofilm sponge as a biological evaporating expanding agent and a biological carrier in combination with MVC. The method adopts an MVC system, preparation of biofilm sponge and a biological evaporating system. The biofilm sponge is prepared through inoculating polyurethane sponge with activated sludge and carrying out aerating and cultivation for acclimation; the leachate is subjected to MVC evaporation treatment to generate a concentrated liquor, and the concentrated liquor is treated through biological evaporation technology. According to the invention, metabolic heat generated by degradation of organic pollutant microorganisms in the MVC concentrated liquor is utilized to evaporate water in the concentrated liquor; the biofilm sponge which is light in weight, is easily available and is short in culture period and free of secondary pollution is used as the biological evaporating expanding agent and the biological carrier, and heat in the concentrated liquor and condensate water generated by MVC treatment are utilized for the needs of a heat source in the biological evaporating process, so that heat energy in the whole system is recycled to the maximum extent. Problems in the conventional pure physical separation process are overcome, and not only can water in the leachate be evaporated, but also polluting substances in the leachate can be reduced.

The invention relates to the technical field of environmental engineering. The purpose is to provide a device and method for zero-discharge treatment of late landfill leachate, which can improve the overall reaction efficiency of short-range nitrification-ANAMMOX, realize zero-discharge treatment of landfill leachate, and can remove landfill leachate Phosphorus, organic matter and heavy metal ions in the The technical solution is: a device for treating late-stage landfill leachate with zero discharge, which is characterized in that it includes a regulating tank unit, a short-range nitrification-anammox integrated reactor unit, a carbonization tank unit, a denitrification tank unit, a spirulina-nitrification Pool unit, sedimentation tank, membrane filtration system unit and intelligent control system; the short-range nitrification-anammox integrated reactor unit includes a short-range nitrification tank unit and anammox reactor unit; the spirulina-nitration tank unit It includes a spirulina pool unit and a nitrification pool unit; the membrane filtration system unit includes a microfilter, a nanofilter and an ultrafilter.

The invention discloses a ship ballast water treatment system based on an electro-catalysis and membrane distillation integrated device. The ship ballast water treatment system comprises a ship engine cooling pool, and a hot side heating device, a hot side water tank, an electro-catalysis and membrane distillation reactor, a cold side water tank and a penetrating fluid cooling system which are sequentially connected through pipelines. The system further comprises a direct-current power supply used for supplying power to the electro-catalysis and membrane distillation reactor, and a clean water storage tank is connected with the cold side water tank. According to the ship ballast water treatment system, an electrocatalytic oxidation technology and a membrane distillation process are scientifically coupled into an integrated ship ballast water treatment device by adopting a submerged reaction tank method, and the system has the advantages of high organic matter degradation efficiency, high ammonia nitrogen removal rate, high desalination efficiency, good effluent quality, effective alleviation of membrane distillation membrane pollution / membrane wetting, prolonged service life of the distillation membrane, realization of ship ballast water source treatment and reuse, effective solving of ship part fresh water demands, and mitigation of port sewage and wastewater treatment pressure.

The invention discloses an environment-friendly treatment device for activated carbon processing. The device comprises a microwave pyrolysis system (1), a closed oxygen-isolated feeding and conveyingsystem (2), a waste gas purification treatment system (3), a hot air circulating system (4) and a discharging system (5), wherein the closed oxygen-isolated feeding and conveying system (2), the wastegas purification treatment system (3), the hot air circulating system (4) and the discharging system (5) are all connected with the microwave pyrolysis system (1). The device is reasonable in structural design and high in environmental friendliness, can perform high-temperature pyrolysis treatment on waste tires by the aid of the microwave heating pyrolysis and environment-friendly waste gas purification treatment systems, can effectively adsorb and remove dust, carbon monoxide, sulfur-containing compounds and other pollutants in waste gas and is high in practicability.

The invention discloses a recovery treatment agent for zero discharge of rolling waste liquid, and also discloses a treatment method for realizing zero discharge of rolling waste liquid by using the above recovery treatment agent, the treatment method can carry out rolling waste emulsion Thorough oil-water separation, the separated oil can be mixed with rolling crude oil in proportion for reuse, and the water phase can be used as daily water replenishment for rolling mills, thus realizing zero-discharge treatment of waste emulsion. The lubricating performance of the mixed oil obtained after blending the oil phase of the oil phase with the rolling crude oil is equivalent to that of the rolling crude oil.

The invention provides a chloride ion passivator, which comprises the following components in terms of mass percentage: 0.001-0.2% of amine, 0.0001-0.01% of fat, and the balance is water; the amine is polyacrylamide and / or alkene Amine, described grease is acrylic acid-acrylate copolymer, or acrylic acid-AMPS-maleic anhydride terpolymer; Also provide a kind of preparation method of chloride ion deactivator; Also provide a kind of desulfurization wastewater treatment method, adopt above-mentioned Chloride ion deactivator. In the present invention, after the desulfurization wastewater is added with a passivating agent, the chloride ion is deactivated, the corrosion of the chloride ion is blocked, and the desulfurization wastewater is turned into non-corrosive ordinary wastewater for evaporation and crystallization treatment, which significantly reduces the investment cost of the system and greatly improves The life and reliability of the system, no by-products appear, realize the zero discharge treatment of desulfurization wastewater, and protect the water resource environment.