Abstract: In place of the incinerator in the present GWTPs, the following is substituted therein: a first reactor treats the vapor phase of the gases being expelled out of the air stripper. These vapors contain gases of volatile contaminants. The vapors are mixed with ozone and pumped into the first reactor where they are further scrubbed and oxidized in a packed column in contact with high concentration hydrogen peroxide. The hydrogen peroxide flows downward through the packing column while the Ozone mixture is fed from the bottom. The combined effect of ozone and hydrogen peroxide serves as a powerful oxidizing medium. The hydrogen peroxide accumulated at the bottom is pumped to the top in a recirculation process to be reused. The hydrogen peroxide can be increased to high concentrations, such as 30%, and recirculated for optimum usage. The second reactor is designed for the water, that is, for liquid phase treatment.

Abstract: The present invention provides a composition and method of administering same for inhibiting the growth of microorganisms. The composition of the present invention includes sufficient amounts of a peracetic acid and a non-oxidizing biocide. The method of the present invention includes the step of adding sufficient amounts of the peracetic acid and the non-oxidizing biocide to industrial process waters.

Abstract: A process for the separation and purification of fat-containing waste water including the step of adding an effective flocculating and oxidizing amount of a composition comprising:10-30% wt. peracid precursor15-70% wt. hydrogen peroxide1-10% wt. phosphoric acidbal. waterThe process may also include the addition of ferrous sulfate or other source of ionic iron to accelerate the action of the peracid composition.

Abstract: In the process and installation for decontaminating a liquid effluent contaminated by at least one organic substance, a gaseous combustible is burned in a reactor to produce a flame containing hydroxyl free radicals OH.degree. and oxygen O.sub.2 and that flame is centered on the geometrical axis of the reactor. A helical flow of liquid effluent is produced on the inner cylindrical wall of the reactor to cause a direct contact between the hydroxyl free radicals and the organic substance contaminating the liquid effluent. By means of the hydroxyl free radicals, the organic substance is oxidized in liquid phase. The high temperature of the flame enables completion of the oxidation of the organic substance, in liquid phase, by means of the oxygen O.sub.2 present in the flame. At the outlet of the reactor, the liquid and gaseous products are separated; the liquid product is collected while the gaseous product is evacuated.

Abstract: A process for removing both color and odor from wastewater effluent that is contaminated from dye complexes, such as azo dye complexes, used for dyeing textiles to be various colors. The process requires treatment of the effluent with alkali metal permanganate, followed by treatment with hydrogen peroxide, followed by treatment a primary coagulant as a flocculation initiator (together with pH control so that the pH is basic), followed by treatment with a water soluble polymer, and followed by separating precipitated flocculated material from the effluent to obtain a clear effluent free of color and odor.

Abstract: The present invention relates generally to controlling the growth of microorganisms, including the inhibition of the growth of filamentous microorganisms in industrial process waters. The invention is directed to a method for preventing and removing the formation of deposits by microorganisms in the wet end of a paper machine with a combination of peracetic acid and an ethylene oxide/propylene oxide copolymer.

Abstract: The invention relates to a process for the treatment of waste waters of the forest industry. According to the invention, waste water is pre-treated biologically, whereafter the further treatment is carried out by using Fe(II) salt and hydrogen peroxide.

Abstract: Dry, free flowing solids, suitable for handling, transportation and/or disposal are produced from messy biologically treated sludges. In the process, the sludge feed is pressurized and heated, then flashed, in order to vaporize a portion of the water; the residual liquid, containing the solids and sometimes heavy metals, is contacted with a chelating agent, if needed, and a flocculating agent over a brief reaction period in order to precipitate a concentrated solid precipitate; and the precipitate is separated from the residual liquid water.

Abstract: A process for reducing the phosphate content in waste water from the preparation of salts of ascorbic acid 2-monophosphate comprisesA. treating the waste water from the crystallization of the metal salts of ascorbic acid 2-monophosphate with an alkali metal or alkaline earth metal hypochlorite, chlorine or H.sub.2 O.sub.2,andB. precipitating, at a pH of 9-12, the inorganic phosphate which has been produced from organically bound phosphorus and/or was present in the waste water, especially as calcium phosphate.

Abstract: An oxidizing agent is added to water polluted with organic compounds, especially organic chlorine compounds, disinfection is carried out, and suspended solids in the water are removed. Thereafter, ultraviolet rays are irradiated to oxidize and decompose the organic compounds, and furthermore, volatile organic compounds are separated and removed from the water. Finally, the oxidizing agents residual in the water are reduced. The oxidizing agent is separately added at two phases of disinfection and oxidization decomposition, thereby causing the decomposing efficiency of organic compounds to be much improved.

Abstract: Process for the decontamination of decontaminants in waste waters, wherein the waste water stream to be treated pass sequentially through following process steps,waste water treatment with hydrogen peroxide (H.sub.2 O.sub.2), irradiating at the same time with UV light,treatment with a reducing agent such as sodium dithionite,precipitation of existing metal contaminants, optionally followed by a filtration and/or a treatment with a selective ion exchanger.

Abstract: Raw water is made acidic so that the pH is not more than 4.5 and heated in the presence of an oxidizing agent to decompose TOC components in the raw water, and then deionized, thereby producing ultrapure water having a greatly low concentration of organic matters.

Abstract: Solutions of sugars obtained during the processing of foodstuffs can be subject to bacterial contamination. In view of the possible legislation to prevent the use of existing disinfectants such as formaldehyde in these conditions, alternative treatments are needed. Effective disinfection of sugar solutions can be achieved employing a peracetic acid solution containing a high mole ratio of hydrogen peroxide to peracetic acid, such as from 18:1 to about 54:1 in combination with a second peracetic acid solution.

Abstract: A borated aqueous solution from a nuclear reactor coolant system dilute chemical-decontamination process or from an equipment washing process which has been contaminated with radioactive metals or heavy metals including cobalt, nickel, chromium, iron, manganese, lead or mercury and with a chelating agent, detergent or soap is treated with an oxidizing agent to oxidize the chelating agent, detergent or soap and to precipitate the contaminant metals. The contaminant metals are then separated from the solution by centrifugal filtration, micromembrane belt filtration or magnetic separation. Advantageously, a very small volume of precipitate may then be buried and the decontaminated solution may be recycled or further treated and released for other uses.

Abstract: Disclosed herein is a treatment facility comprising a fluid bed reactor including a reactor tank containing a bed of particles which function as a carrier for growth of biological material, the reactor tank having an inlet and an outlet, the reactor further including structure for conducting liquid to be treated, from the reactor tank inlet, upwardly through the bed of particles at a rate conducive to fluidization of the bed of particles; an equalization surge tank for housing liquid to be treated in the fluid bed reactor, the equalization surge tank having an inlet, and an outlet; conduit structure for supplying liquid from the outlet of the equalization surge tank to the inlet of the fluid bed reactor; and structure for supplying an oxidant into the equalization surge tank, in such a manner that stripping of volatile constituents is avoided, for oxidizing iron in the liquid in the equalization surge tank.

Abstract: Method of controlling fresh water mussels of the Dreissenidae family (zebra and quagga mussels) by direct contact with peracetic acid or indirectly by application to an environment where control is desired. The biofouling of environments, such as fresh water intakes, conduits and storage systems of power and water treatment systems, and of processing streams of industrial plants, is thereby reduced or eliminated.

Abstract: A process to purify waste waters using chemical oxidation and Fenton's reagent by the action in the acid range of hydrogen peroxide and iron(II) compounds and subsequent precipitation in the weakly acid to alkaline range of the iron(III) compounds, said process being characterized in that the sludge containing iron(III) accumulating in addition to the purified waste water is reduced electrolytically back into iron(II) compounds and in that the sludge so reduced is fed back into the process. The process of the invention allows extensive purification of highly concentrated waste waters and furthermore problems arising with the treatment and elimination of the Fenton sludge can be circumvented.

Abstract: A method of decontaminating the surface of a body carrying radioactive contaminants which comprises treating the surface with a decontaminant comprising a solution of tetrafluoroboric acid HBF.sub.4, treating the resultant liquor comprising decontaminant and dissolved species removed from the body surface with a first chemical agent which on reacting with dissolved species yields insoluble compounds and regenerated decontaminant solution, and characterized in that the regenerated decontaminant solution is further treated to cause removal of the first chemical agent from the decontaminant solution.

Abstract: A method for treating the waste stream resulting from electroless plating operations such as copper electroless plating. The waste stream is simultaneously treated with hydrogen peroxide and UV light to bring the level of contaminants below the discharge limit. In one embodiment, the waste stream is also diluted with rinse water from the plating process.

Abstract: A method for remediating a hydrocarbon-contaminated region of a subterranean body of groundwater to destroy or reduce the initial concentration levels of hydrocarbon contaminants. A plurality of mutually spaced wells are provided which intersect the groundwater region. A treating flow of acetic acid is provided from one or more of the wells into the groundwater region, to establish acidic conditions. A turbulent flow of an aqueous solution of ferrous ion into the groundwater region is generated for mixing with the acidified groundwater, thereby providing a catalyst for disassociation of hydrogen peroxide. A treating flow of hydrogen peroxide solution from one or more of the wells into the groundwater region is then provided, so that the hydrogen peroxide may undergo a Fenton-like reaction in the presence of the acidic conditions and ferrous ion to generate hydroxyl free radicals for oxidizing the contaminants. An apparatus system for practicing the method is also disclosed.

Abstract: Heavy metals are removed from waste lubricating oil by heating in the presence of an oxidation catalyst and a free radical initiator at temperatures in the range of about 150.degree.-200.degree. C. Corrosion and oxidation inhibitors previously added to the oil are thereby oxidized to form a separable sludge which contains the bulk of heavy metal contamination. The process is of particular advantage in removing contaminating radioactive nuclides from lubricating oils used in nuclear generating facilities.

Abstract: The present invention provides a method for treating hexamine waste water. The method includes subjecting the waste water to conditions sufficient to remove volatile constituents, passing the waste water through a cation exchange resin capable of absorbing cations, and optionally either subjecting the waste water to a bacteria culture capable of consuming formaldehyde in the presence of an organic nutrient for the bacteria or subjecting the waste water to ultraviolet light in the presence of an oxidizing agent. The method may include both optional method steps, but must include at least one. The method also includes regenerating the cation exchange resin to remove the absorbed cations and reform the cation exchange resin. The present invention also provides an apparatus for treating hexamine waste water.

Abstract: The invention relates to a process for the purifying working-up of liquid reaction media and/or wash media obtained during preparation of cellulose ethers, which are insoluble in hot water, from cellulose, an alkali metal hydroxide and at least one etherifying agent in a medium containing water and if appropriate at least one organic solvent, by ultrafiltration of the media into a permeate and concentrate, which comprises carrying out the ultrafiltration of the reaction media and/or wash media at a temperature at or above the flocculation temperature of the cellulose ethers.

Abstract: Reactor for the optimized ozonization of water intended for human consumption, in which the direct oxidizing action of the ozone is supplemented by the radical oxidizing action of the ozone, the latter being intensified by the introduction of hydrogen peroxide, characterized in that it comprises three contact tanks arranged in series: a first contact tank receiving the water to be treated and intended for the direct and rapid oxidizing action by the ozone which is introduced into the said tank and brought into contact with the liquid to be treated; a second contact tank intended to ensure the disinfection of the liquid and into which is injected the quantity of ozone necessary to maintain in the liquid to be treated the residual ozone concentration necessary for the disinfection of the water; and a third contact tank intended to ensure the radical action of the ozone, into which there is injected, besides the ozone, a quantity of hydrogen peroxide intended to increase the quantity of OH radicals available for

Abstract: The present invention provides a composition and method of administering same for inhibiting the growth of microorganisms. The composition of the present invention includes sufficient amounts of a peracetic acid and a second organic biocide. The method of the present invention includes the step of adding sufficient amounts of the peracetic acid and the organic biocide to industrial process waters.

Abstract: Processes for the treatment of organic waste are disclosed, including feeding the organic waste to an ATAD reactor and subjecting the organic waste to biological digestion in the ATAD reactor in order to produce a biomass and clear decant therein, oxidizing at least a portion of the biomass so as to produce an oxidized effluent therein, and returning the oxidized effluent to the ATAD reactor. Variations on these processes which are disclosed include the removal of nutrients from the clear decant, treating of the organic waste with a mixer prior to feeding it to the ATAD reactor, feeding the waste by a grinder upstream of the mixer, feeding the mixed material initially to an AAD vessel from which methane gas is removed, and then to the ATAD reactor, with or without nutrient removal, the use of solid separation for the effluent from the ATAD reactor, and other such variants.

Abstract: A process for the treatment of material which is or is suspected to be contaminated with one or more actinides or compounds thereof, which process includes contacting the said material with a liquid medium which comprises an aqueous solution which is free of heavy metal ions (prior to use thereof) and comprises ingredients which are naturally degradable to non-toxic products with or without mild physical assistance such as heat or ultra-violet radiation, said solution comprising:(a) carbonated water;(b) a conditioning agent; and(c) a complexing agent which comprises the anion of a carboxylic acid having from 2 to 6 carbon atoms;wherein the said process is for treatment of solid organic wastes which are or are suspected to be contaminated with plutonium or compounds thereof with or without other hazardous contaminants and includes the steps of shredding the organic waste material, intimately mixing the shredded waste material with the said liquid medium thereby dissolving contaminants as complexes in said liqu

Abstract: Raw water containing organic chlorine compounds is supplied in an aeration tank, wherein the organic chlorine compounds contained in the raw water are transferred into air or gas. The gas obtained from the aeration tank is collected in a treatment solution of a decomposition-treatment tank. The treatment solution contains an oxidizing agent and ultraviolet rays are irradiated to the treatment solution in the deocmposition-treatment tank to activate the oxidizing agent, to thereby oxidization-decompose the organic chlorine compounds in the gas.

Abstract: A process for the separation and purification of fat-containing waste water including the step of adding an effective flocculating and oxidizing amount of a composition including:10-30% acetic acid5-20% peracetic acid15-25% hydrogen peroxide1-10% phosphoric acidbal. waterThe process may also include the addition of ferrous sulfate or other source of ionic iron to accelerate the action of the peracetic acid composition.

Abstract: Waste water effluent streams are treated with hydrogen peroxide and ultraviolet radiation. Hydroxyl ions formed by action of UV on H.sub.2 O.sub.2 reduces BOD, COD, AOX and color in effluent. In the case of pulp mill effluent, some or all of the effluent can then be recycled to the pulp mill.

Abstract: The apparatus includes a container for accommodating water to be treated and evaporating the water. Container is attached with water supply for supplying the water to be treated into the container. The water to be treated in container is heated by a heater. Vapor evaporated from the inside of container is cooled by a cooler. Distilled water output from cooler is irradiated with ultraviolet light by a ultraviolet light irradiator. An organic decomposed substance contained in the distilled water irradiated with the ultraviolet light is removed by organic decomposed substance removal device, and ultrapure water is obtained.

Abstract: The invention concerns a method of treating effluents in order to eliminate the organic compounds. The method comprises a primary oxidation stage with hydrogen peroxide in an alkaline medium, a secondary oxidation stage in a neutral medium and a subsequent absorption stage. The effluent thus treated can be discharged directly to drain. The invention can be applied in particular to effluents originating from photographic development baths.

Abstract: The present invention relates to a process for decreasing the content of organic-chemical substances in waste water by chemical oxidation, preferably in the presence of chlorine, and optionally additional alkaline thermal treatment of the waste water, in which the waste water, which has a COD content (chemical oxygen demand) and is alkaline or is rendered alkaline, is introduced into at least one reactor and is treated at a temperature of more than 15.degree. C. with a chlorine-containing and/or chlorine-releasing chemical substance, the introduction of chlorine taking place in a quantity of more than 1 g chlorine/g COD (relative to the chlorine content of the chlorine-containing and/or chlorine-releasing chemical substance), and a molar ratio of OH.sup.- to chlorine of more than 1.5 and a pH value of the waste water of .gtoreq.5 being maintained or set, and the resulting chlorine-treated, hypochlorite-containing waste water is subjected to a reaction time of more than 0.

Abstract: The present invention relates to a process for eliminating the organic compounds from aqueous effluents having a chemical oxygen demand (COD) greater than 5 g/l.The process consists of treating the effluents with a sufficient quantity of light energy originating from a polychromatic UV source in the presence of H.sub.2 O.sub.2. The quantity of oxygen provided by the hydrogen peroxide expressed in grams per liter is between 0.5 and 3 times the COD of the effluent to be treated and the pH is equal to or less than 10.5.This process applies to photographic effluents.

Abstract: Apparatus and a method are disclosed for decontaminating water, using an ionizing reactor. Water contaminated by organic compounds is introduced into a chamber in which it is concurrently irradiated by microwave and an ultraviolet source to activate it by photolysis. The water is then introduced to a hydroxyl reactor chamber. An oxidizing reagent, such as hydrogen peroxide, is irradiated by subjecting it to the UV source and conducting it through the chamber, without mixing it with the water. The activated water and irradiated oxidizing reagent are then vectored to a locus at which they are mixed under UV from the source. The apparatus and method may be incorporated into a water treatment system employing existing contaminant extraction techniques, such as immiscible fluids separation and turbo-aspirated sparging.

Abstract: A method for increasing the filtration rate of a precipitate produced from a photographic effluent includes treating the effluent with hydrogen peroxide and an alkaline earth metal salt to form a precipitate and adding to the precipitate a diatomaceous earth filtering aid and then filtering the precipitate.

Abstract: A process for the curing of animal hides using a brine solution including the step of adding an effective bactericidal and flocculating amount of a composition comprising:10-30 wt. % acetic acid5-20 wt. % peracetic acid15-25 wt. % hydrogen peroxide1-10 wt. % phosphoric acidbalance waterOther peracids, such as, perlactic acid, percitric acid, perproprionic acid, perbenzoic acid, perpentenoic acid and perbutyric acid may be used.

Abstract: An apparatus includes a frame carrying a process tank, ozone generating tubes, a venturi, and an infusion chamber for treating water with ozone. A pump circulates water from the process tank and through the venturi to the infusion chamber. The infusion chamber is connected immediately downstream from the venturi. The infusion chamber has a predetermined pressure to produce a head space and thereby generate a relatively large number of bubbles of relatively small size to enhance the mass transfer of ozone into the water. A length of tubing is connected downstream from the infusion chamber to enhance the contact time between the ozone and the contaminants. An ozone generator tube including an inner electrode formed of a mass of helical windings produces a high concentration of ozone from a cooled air supply.

Abstract: A method of treating chemical liquid effluent to render it more environmentally acceptable, comprising the addition of hydrogen peroxide, or a compound capable of liberating hydrogen peroxide, to the effluent to react with and break down a sequestering agent. The reaction rate may be enhanced by the addition of a small amount of a compound including a transition metal ion, especially the nitrate or sulphate of iron or manganese.

Abstract: An ultraviolet radiation exposure fluid decontamination apparatus is provided which includes a container made of high tensile strength material through which the fluid to be treated flows, a high intensity, directed beam light source, and an ultraviolet transparent window through which the directed beam propagates. The container interior has a reflective surface which distributes the light throughout the container. A non-stick material lines the container interior which prevents fouling of the container. The window is also protected by a similar non-stick material. Organic contaminates are oxidized to carbon dioxide, water and other nonharmful products during the fluid treatment carried out by this apparatus.

Abstract: The invention is a process for preventing microbial growth in aqueous streams by applying peracetic acid to the aqueous stream. Generally, the process of the invention is applicable to aqueous streams used in any number of applications such as the application of streams for the transport of fruits or vegetables into the processing environment and through the various steps of processing.

Abstract: The invention relates to a process for treating industrial waste water which comprises either: (a) pre-treating the waste water with at least two different pre-treatments selected from adsorption, membrane filtration and oxidation and then, biologically purifying the waste water or, (b) neutralizing and biologically purifying the waste water and then after-treating the waste water either by membrane filtration in combination with adsorption or oxidation or, by oxidation optionally in combination with adsorption or filtration on a nanofiltration membrane or, by filtration on a nanofiltration membrane.

Abstract: A process for treating effluents, such as precious metal tailings, having a pH of at least 9 and containing cyanide is described in which Caro's acid is added to the effluent having a pH of at least 9 and commencing the reaction of the cyanide with Caro's acid at 0.degree. C. to 80.degree. C. in the absence of an added alkali; adding sufficient Caro's acid within a mole ratio of Caro's acid to cyanide of 0.3/1 to 3/1 to reduce the pH of the effluent to below 9, continuing the reaction between Caro's acid and the cyanide to reduce the amount of cyanide remaining in the effluent and to recover an environmentally compatible effluent reduced in amounts of cyanide.

Abstract: Process for oxidizing organic materials or compounds in aqueous phase, with hydrogen peroxide and in the presence of ferrous ions Fe-(II), and optionally cupric ions cu-(II), carried out under irradiation with artificial visible light.

Abstract: A method of preventing and controlling corrosion and build-up of scale in cooling-water systems at water temperatures below about 212.degree. F. The method comprises the use of an effective amount of hydrogen peroxide, i.e., 0.01 to 100 parts by weight per million parts of water, about 0.01 to 100 parts by weight of at least one organic triazole per million parts of water, 0.1 to 200 parts by weight per million parts of water of at least one polymerized ethylenically unsaturated carboxylic acid, e.g., polymerized maleic acid having average molecular weights ranging from about 250 to 500,000 and 0 to 200 parts by weight, e.g., 0.1 to 50 parts of at least one non-ionic surfactant.

Abstract: A method and apparatus for the treatment of an effluent containing an organic chlorine compound in the presence of a porous iron type metallic article and hydrogen peroxide thereby effecting oxidizing decomposition of the organic chlorine compound, operated by a procedure which comprises causing the organic chlorine compound having hydrogen peroxide incorporated preparatorily therein to be circulated through a closed vessel having the porous iron type metallic article disposed therein thereby effecting oxidizing decomposition of the organic chlorine compound and then simultaneously circulating and aerating the effluent containing the organic chlorine compound under the condition of keeping the upper part of the closed vessel in an opened state thereby effecting oxidizing decomposition of the organic chlorine compound or causing the gaseous phase stagnating in the upper part of the vessel to be introduced into the effluent.

Abstract: The oxidation of metal-complexed cyanide under acid conditions using oxygen as the oxidizing agent can be performed effectively with certain metal chelates as catalysts. Especially effective chelates are metal phthalocyanines, particularly where the metal is vanadium or a member of the iron group metals. The oxidation can be effected homogeneously using water soluble metal chelates, or can be performed heterogeneously, especially in a continuous fashion using a packed bed reactor, by using suitable water-insoluble metal chelates, especially when supported on appropriate carriers.

Abstract: An in situ method of cleaning contaminated soil and/or water comprises breaking up contaminated soil, admixing soil with water and a biodegradable detergent in a proportion effective to obtain an aqueous slurry where the contaminant and the detergent interact, allowing the slurry to stand under conditions effective to permit any contaminant-detergent formations to rise in the aqueous slurry, separating the contaminant-detergent formations from the aqueous slurry, now comprising partially decontaminated soil and water, separating the soil from the water, repeating the cleaning and separation steps until the soil has less contaminant than a predetermined value, typically a 80 to 90 percent decrease, admixing the low contamination-soil with water and an activating agent for contaminant-degrading microorganism, the agent being capable of generating hydrogen peroxide (H.sub.2 O.sub.

Abstract: The present invention provides a composition and method of administering same for inhibiting the growth of aerobic microorganisms. The composition of the present invention includes sufficient amounts of an oxidant and glutaraldehyde. The method of the present invention includes the step of adding the oxidant and glutaraldehyde to industrial process waters.

Abstract: An oxidizing resin for iodide conversion and retention is prepared from a metal chelating resin providing functional groups binding polyvalent metal ions. The oxidizing resin is formed by applying an alcohol solution of zirconium peroxide to the chelating resin granules. The resulting oxidizing resin will convert iodide to iodine in aqueous solution, and will retain the converted iodine within the resin granules. When the oxidative capacity has been reduced by treating large amounts of iodide, it can be easily regenerated by contacting the zirconium-containing resin with hydrogen peroxide.