Abstract: Methods for the use of peracid compositions having decreased hydrogen peroxide concentration and a UV-blocking agent for various water treatments, including oil- and gas-field operations, and/or other aseptic treatments are disclosed. In numerous aspects, peracetic acid is the preferred peracid and is treated with a peroxide-reducing agent to substantially reduce the hydrogen peroxide content. Methods for using the treated peracid compositions for treatment of drilling fluids, frac fluids, flow back waters and disposal waters are also disclosed for improving water condition, reducing oxidizing damage associated with hydrogen peroxide and/or reducing bacteria infestation.

Abstract: A floating dispenser having an external float or an internal float for supporting a cartridge or cartridges for floatingly delivering a dispersant or dispersants to a body of water with the floating dispenser having cartridges rotationally positionable with respect to one another to control the rate of dispensing while the dispenser floats in an upright condition with the floating dispenser changing its flotation orientation in response to consumption of the dispersant or dispersants in the cartridge or cartridges to thereby provide a visual alert to replace a spent cartridge with a fresh cartridge. In addition, the inventions described herein permit changing the dispensing nature of the system from a multiple dispensing system to a single dispensing system without changing the floating characteristics of the floating dispensers through replacement of a dispersant in one of the cartridges with an inert or ballast material that has no effect on the water characteristics.

Abstract: The invention relates to methods and apparatuses for treating a condensate stream from a condenser that contains odorous compounds, such as various condensate streams produced in a rendering process. In one embodiment, the condensate stream is treated by adding an oxidizer to the liquid condensate stream to oxidize odor-causing compounds in the stream prior to being treated in a waste water pre-treatment system. In this manner, the odor resulting from these compounds can be reduced or eliminated.

Abstract: A waste treatment system may include a liquid separator for removing water from solid waste, a mixing tank connected to the liquid separator for mixing the solid waste with an oxidizing agent, a heat exchanger connected to the mixing tank for collecting heat generated by an exothermic reaction caused by mixing the oxidizing agent with the solid waste, and a sanitizer connected to the liquid separator to sanitize the water removed from the solid waste. A waste treatment method may involve separating water from solid waste in a liquid separator, mixing the solid waste from the liquid separator with an oxidizing agent in a mixing tank connected to the liquid separator to cause an exothermic reaction, collecting heat from the exothermic reaction in a heat exchanger coupled with the mixing tank, and sanitizing the water from the liquid separator in a sanitizer.

Abstract: Compositions and methods for the use of peracid compositions having low to substantially no hydrogen peroxide for various water treatments, including oil- and gas-field operations, and/or other aseptic treatments are disclosed. In numerous aspects, peracetic acid is the preferred peracid and is treated with a peroxide-reducing agent to substantially reduce the hydrogen peroxide content. Methods for using the treated peracid compositions for treatment of drilling fluids, frac fluids, flow back waters and disposal waters are also disclosed for improving water condition, reducing oxidizing damage associated with hydrogen peroxide and/or reducing bacteria infestation.

Abstract: A filter cartridge and closure system is described comprising a filter cartridge for holding a filter pod that may be used, for example, to filter domestic water. In one embodiment, the filter cartridge and closure system enables the use of reusable filters in water pitchers, including reusable gravity-flow water filters.

Abstract: An additive carrier for a spin-on filter is provided. The additive carrier is positioned at an upstream side of the filter and includes a basket defining an annular body. The annular body includes a concentric opening extending therethrough, a circumferentially extending recess configured to receive and store an additive material and a plurality of flanges extending radially within the recess, the flanges spaced apart in a circumferential direction of the recess to form a plurality of sub-recesses.

Abstract: An ozone dissolution chamber utilizes the principle of laminar stratification of gas in a turbulent dissolution chamber. The dissolution chamber is much shorter in height than the conventional tower dissolution chamber, and ensures a high degree of dissolution of ozone in water and, consequently, a high degree of oxidation of organic and metal impurities to a final oxidation state.

Abstract: Treatment of the wastewater from isophorone production comprising neutralization, filtration and a downstream chemical oxidation process and subsequent reduction. The invention relates to treatment of the wastewater from isophorone (IP) production comprising neutralization, filtration and a downstream chemical oxidation process and subsequent reduction.

Abstract: A water treatment product and a method of water treatment are disclosed. The water treatment product comprises a layer and a water treating agent. The layer comprises a substance sensitive to a parameter directly or indirectly indicative of water quality of a body of water to which the layer is exposed. The layer deteriorates when the parameter indicative of water quality is poor. The water treating agent is thereby exposed to the body of water when the layer deteriorates, thereby improving the water quality.

Abstract: Provided is a purification device for purifying a useful substance (i.e., target substance) without using an acidic eluent. The purification device purifying the target substance comprises a column and a filler packed in the column. The filler contains a carrier, a temperature responsive polyamino acid bonded to the carrier, and a binding substance bonded to the temperature responsive polyamino acid and specifically bonding to the target substance.

Abstract: A method and apparatus for treating a body of water to kill microorganisms by enhancing the concentration metal ions therein. The apparatus comprising a dispenser with a first housing having a water accessible compartment containing 5,5-dimethylhydantoin for releasing the 5,5-dimethylhydantoin when contacted by the body of water and a second housing having a water accessible compartment containing a biocidal metal to the body of water for generating biocidal metal ions when contacted by the body of water containing the 5,5-dimethylhydantoin.

Abstract: Disclosed herein are methods and systems for treating greywater from a microbial food decomposition process. A method includes flowing, into a mixing chamber of a water treatment tank, a first volume of untreated greywater. A second volume of recirculated greywater mixed with ozone gas is flowed into the mixing chamber, and mixes with the first volume of untreated greywater to produce a third volume. The third volume of greywater is flowed into a storage tank. The method further includes diverting a first portion of the third volume out of the water treatment tank, and diverting a second portion of the third volume into a recirculation line that flows the second portion back to the mixing chamber.

Abstract: A system for and method of sanitizing water and waterway surfaces using ozone gas is disclosed wherein water is circulated from a water reservoir in a water ozonation loop means. Ozone is generated by an ozone generator and dispensed into the circulating water by an ozone feed means. In some embodiments the ozone is generated from gas in the water reservoir and dispensed into the water ozonation loop means at a venturi tube. A controller is provided for activating an ozonation cycle. In some embodiments, the ozonation cycle includes the actuation of a circulating water pump for a cycle interval, and the actuation of an ozone generator during an ozone generation interval, which is less than the cycle interval.

Abstract: A process for treatment of municipal wastewater plant sludge to the criteria of Class A biosolids. The process uses hydrogen peroxide and thermo-oxidation to reduce volatile suspended solids to meet the criteria. On a batch basis, waste activated sludge is introduced into a reactor; the concentration of the waste activated sludge is adjusted to about 1.5% total suspended solids with secondary effluent, if necessary; the reactor is mixed; the reactor is pre-heated to an operating temperature in a range of about 65° C. to about 90° C.; subsequently, a 50% solution of laboratory grade hydrogen peroxide is introduced into the bottom of the reactor; and the contents are heated for at least 4 hours.

Abstract: A wastewater disposal method using a two-way oxygen supply horizontal-flow biofilm includes a carrier that is formed of a permeable material so that oxygen is supplied to the biofilm from the bottom layer of the biofilm adjacent to the surface of the carrier, so as to achieve a mode of simultaneously supplying oxygen from the surface layer and the bottom layer of the biofilm. Wastewater disposal equipment using a two-way oxygen supply horizontal-flow biofilm includes a water intake system, a reaction system and a water discharge system.

Abstract: The present invention describes a hybrid device (1) for a recirculation shower, allowing purification and either recycling of water or discarding of water, wherein said hybrid device (1) comprises a recirculation loop (2), a filter system (4) with a nano-filter (5) such as for instance an electropositive nano-ceramic filter, e.g. a nano alumina (fiber) filter, at least one filter quality sensor (3), at least one pre-filter (6), and wherein the hybrid device (1) is arranged to redirect the water from recirculation to drainage when the at least one filter quality sensor (3) indicates the need thereof.

Abstract: A stormwater runoff treatment system that offers an economical means of achieving highly efficient, effective, and compact means of treating runoff through a unique method of flow restrictions, diversions, elevation differences and strategically located components to achieve a combination of treatment advantages.

Abstract: A device and method are provided for neutralizing corrosive fluids that discharge from several types of condensing appliances. The disclosed device comprises a flow enclosure and a flow channel concentrically aligned with an inlet connection positioned on an upper cap and aligned substantially perpendicular to an outlet connection also positioned on the upper cap, thus allowing the disclosed device to further serve as a gas trap. Replacement of the neutralizing media housed within the flow enclosure may proceed without disconnecting the device at the inlet.

Abstract: A floating weir basket (40) that eliminates the need for hinged doors on conventional fixed pool skimmers (4).