283results about "Paint waste treatment" patented technology

Novel ultrasonic treatment systems for separating compounds in an aqueous effluent and processes for using the ultrasonic treatment systems are disclosed. More particularly, the ultrasonic treatment systems use ultrasonic energy to energize adsorbent to provide efficient and effective removal of compounds from aqueous effluents, such as textile effluents.

Provided is a biocidal composition comprising glutaraldehyde and an oxazolidine biocidal compound. The composition is useful for controlling microorganisms in aqueous or water containing systems such as found in oil and natural gas production.

A high-density filtration module for separating a liquid from a high viscosity and/or high solids feed comprising sheets of porous filtration membrane being disposed generally concentrically about a central porous tube. The membranes are separated by a sheet of feed liquid spacer material having two sets of generally parallel ribs of similar size regularly spaced apart from one another which project from opposite surfaces of a thin central layer. Permeate carrier layers are disposed adjacent discharge surfaces of the sheet membranes. The sets of ribs are arranged so that each rib is located substantially equidistant from the two adjacent ribs in the opposite set, and the central layer is about 40% or less as thick as the base of a rib where it joins the central layer.

A method and apparatus are disclosed for remediating odorous media using an alkane substrate. The alkane substrate, such as butane, is introduced to the odorous medium in order to reduce or eliminate odors. The alkanes may remediate water, wastewater, soil, gas, solid waste, fish waste, algae and algal material.

A composition and method for treating oversprayed paints in paint spray booths is provided. The method includes contacting the paint overspray with a wash water system comprising an agitated solution containing a microorganism concentrate so as to collect the paint overspray in the agitated solution. The solution containing the paint overspray is passed to a holding area for phase separation into an organic phase containing paint overspray and an aqueous phase. The organic phase containing the paint overspray, which contains the paint solids portion, and, optionally, an organic solvents portion, is separated from the aqueous phase. The wash water system for treating paint overspray in paint spray booths contains a microorganism concentrate in an amount effective in precipitating the paint solids and, optionally, organic solvents, from the system.

A method of reacting chemicals comprising the exposure of the reactants to ultrasound and electrochemical energies in the presence of a metal or metal salt and hydrogen peroxide. HO* radicals are efficiently formed and react with a carbon-based reactant to form a carbon radical which then reacts with other reactants or may dimerize. The invention regenerates the metal ions and may be performed using no special facilities. Increased product yield was achieved for a number of hydroxylation reactions.

Disclosed are a method and apparatus for decolorization of reactive anthraquinone dye-containing wastewater using photocatalytic oxidation, which include inducing high-efficiency photocatalytic oxidation under a controlled salt concentration and pH of wastewater to perform effective decolorization of reactive anthraquinone dye-containing wastewater. The method for decolorization of reactive anthraquinone dye-containing wastewater using photocatalytic oxidation, includes: introducing a photocatalyst and salt into reactive anthraquinone dye-containing wastewater and adjusting pH of the wastewater to a level higher than neutral pH; and irradiating UV to the photocatalyst to carry out cleavage of the reactive anthraquinone dyes through photocatalytic oxidation, thereby accomplishing decolorization of wastewater.

Disclosed are combinations of one or more cationic starch(es) and aluminum salts to produce a composition for detackifying paint at lower doses than those required using conventional treatments while providing improved handling and a more “green” environmental profile. The compositions may be utilized in methods of detackifying and dispersing solvent borne paints and/or coagulating/flocculating and dispersing waterborne paints during the treatment of paint spray booth water.

The invention relates to a material consisting of hard fibers on which nanoparticles of metals or metal oxides, preferably period IV transition metal oxides, are deposited, using different techniques, said material being used in the degradation and removal of contaminants found in liquid matrices. The invention also relates to a method for the in situ synthesis thereof.

The current invention relates to a composition and a method for treating impurities in a circulating water system. The circulating water system impurities may be oversprayed paint in paint spray booth applications. The composition includes an aqueous solution of a cationized starch, a polybasic aluminum salt such as aluminum chlorohydrate or polyaluminum chloride and a solution of a medium to high MW aqueous flocculant. The composition is particularly useful when added to recirculating scrubber water in paint spray booths for effectively treating both water based and solvent based paints.

The invention discloses a preparation method of a silver-azotetrazole metal organic framework material and an application of the silver-azotetrazole metal organic framework material in organic dye photodegradation. The preparation method comprises the following steps: by adopting a simple solvent diffusion method, reacting metal silver salt with ethylenediamine to prepare a stable metal solution, and reacting the solution with an organic solution of 5,5'-azotetrazole to prepare the silver-azotetrazole metal organic framework material with photodegradation efficiency. The material disclosed by the invention can be used for decomposing 86.3% of an organic dye namely rhodamine 6G within 60 minutes under the irradiation of ultraviolet light. The material is simple in preparation process and high in photocatalytic degradation efficiency of organic dye, so that the material is an organic pollutant photodegradation material with great potential.

The invention discloses a treatment method of malachite green dye wastewater, and aims to solve the problems in an existing treatment method of malachite green dye wastewater, such as high cost, long period, poor operation stability and likelihood of causing secondary pollution. The method comprises the following steps: (1) preparation of a mixed adsorbent: mixing steel slag and coke in a mass ratio of 1:0.8-1.5; (2) oscillation: adding an adsorbent 0.8-2 wt% of the wastewater into the malachite green dye wastewater, and oscillating for 0.5-30 h; and (3) solid-liquid separation: separating steel slag in the wastewater to obtain treated water. The invention has the characteristics of simple method, low production cost, high efficiency and short treatment time; while, the used steel slag can be treated by microwave for reuse, so as to avoid secondary pollution.

The method provides an automobile factory wastewater treatment method. The method comprises 1) classification treatment: classifying wastewater of an automobile plant into phosphating wastewater, paint spraying electrophoresis wastewater and degreasing wastewater, and pretreating the phosphating wastewater and paint spraying electrophoresis wastewater, and 2) comprehensive treatment: mixing the pretreated phosphating wastewater, paint spraying electrophoresis wastewater and degreasing wastewater, adding lime milk to adjust pH to 9-10, adding a coagulant and a flocculant into the mixture, carrying out stirring, taking the supernatant, adding a dilute acid to adjust pH to 8-9, adding the coagulant and flocculant into the mixture, carrying out stirring, carrying out air flotation, adding a dilute acid into the air flotation waste liquid to adjust pH to 6-8, and carrying out biochemical treatment through bacteria. The invention also provides a use of the method in treatment on automotive coating wastewater.

The invention discloses a method for preparing efficient environmental-friendly universal magnesium silicate coating mist polycoagulant. The method comprises the following process steps: 1) mixing magnesium silicate lithium and organic quaternary ammonium salt, blending with water so as to obtain a hectorite water dispersing liquid of which the solid content is 15-30%, further adding water-soluble ferric salt, uniformly stirring and mixing, dropping a sodium carbonate solution till the pH value of the water solution is greater than or equal to 12; and 2) adding water-soluble anion resin into the solution obtained in the step I, uniformly stirring and mixing, further adding cationic polyacrylamide, and sufficiently stirring, thereby obtaining the efficient universal magnesium silicate coating mist polycoagulant. The invention aims to overcome the defects of the prior art, and provides a preparation method for magnesium silicate coating mist polycoagulant which is environmental-friendly, low in cost and high in coating mist removal efficiency.

A process for removing solids from a water-based flush solution, The process includes: providing dirty flush solution; directing the dirty flush solution to a treatment vessel; adding one or more chemicals to the treatment vessel to form a treated flush solution; separating aggregated paint compounds from the treated flush solution to form a filtered flush solution; and directing the filtered flush solution to spray application equipment. The flush system of the invention includes a treatment vessel, wherein the dirty flush solution is mixed with one or more chemicals to form a treated flush solution; a primary separation unit to remove particles including aggregated paint compounds from the treated flush solution to form a filtered flush solution; and transfer lines to direct the filtered flush solution to spray application equipment. The filtered flush solution contains: 1% to 5% by weight of a water soluble organic solvent; 0.08% to 2% by weight of an alkaline agent selected from an amine or an alkanolamine; 0.2% to 1.5% by weight of polypropylene glycol; 0.3% to 2.5% by weight of alkoxyethanol; and water.

The invention mainly relates to a technology for purifying certain heavy metal pollutants in sewage and removing phosphorus by mixed constructed wetland substrates. According to the invention, raw material preparation components, structures, volumes and mass ratio of the constructed wetland substrates are determined, removing effects of wastewater pollutants in different preparation modes are tested and analyzed, and an optimized preparation method is provided. The invention has a guiding significance for the construction and operation of the constructed wetland for treating the wastewater containing heavy metals and wastewater containing phosphorus.

A method of washing trades equipment comprising directing a wash fluid in a substantially clean state supplied from a supply tank by a first pump through a nozzle, at the equipment. Collecting the now contaminated wash fluid within a receptacle into a collection tank positioned above the supply tank. The wash fluid in the collection tank dosed by a coagulant is allowed to separate into relatively clean wash fluid above a layer of sediment in the collection tank, and at least a portion of the relatively clean wash fluid in said collection tank is discharged into the supply tank under the influence of gravity. Periodically a second pump is used to pump sediment and wash fluid to a filter assembly and that under the influence of gravity wash fluid passes through the filter assembly thereby by leaving behind a substantially de-watered sediment in the filter assembly,