Comparing peracetic acid and hypochlorite for disinfection of combined sewer overflows: Effects of suspended-solids and pH

The invention concerns the use of an efficient amount of at least one micro-organism belonging to the Lactobacillus paracasei or casei species, one of their fractions or one of their metabolites combined with an efficient amount of at least a micro-organism belonging to the Bifidobacterium longum or Bifidobacterium lactis species, one of their fractions or one of their metabolites, for making a dermatological composition for treating and/or preventing sensitive skins associated or not with skin dryness.

Cosmetic and/or dermatological composition for sensitive skins

The invention relates to a cosmetic and/or dermatological topical composition, of particular use for the prevention and/or treatment of sensitive and/or dry skin, comprising an effective amount of at least one particularly probiotic microorganism and/or a fraction or metabolite thereof in combination with an effective amount of at least one polyunsaturated fatty acid and/or polyunsaturated fatty acid ester and/or the salts or derivatives thereof in a physiologically-acceptable vehicle.

Cosmetic and/or dermatological composition for prevention and/or treatment of sensitive or dry skin

A method uses anionic and cationic polymers added in, any order or simultaneously, to aqueous media for the removal of substances. The sequential addition of the two biopolymers, anionic xanthan, followed by cationic chitosan, causes the rapid formation of very large and cohesive fibrillar aggregates that may exhibit high solids to liquid ratios and that quickly settle out from the aqueous media. The aqueous media can be easily separated from the large fibrillar aggregates by settling under gravity or by filtration through a porous containment device, such as a synthetic or non-synthetic woven or non-woven fabric including a geotextile fabric or a solid containment device containing a solid mesh screen.

Use of a dual polymer system for enhanced water recovery and improved separation of suspended solids and other substances from an aqueous media

The invention discloses a process to implement and maintain large water bodies with color, transparency, and cleanness characteristics similar to swimming pools or tropical seas, at low cost. The present invention also discloses a structure to contain large water bodies, comprising a system for the removal of impurities and surface oils by means of skimmers and a suction device to clean said structure.

Process to maintain large clean recreational water bodies

The invention includes compositions and a method of treating water to reduce algae in bodies of water, including decorative fountains, swimming pools, wastewater lagoons, storage reservoirs, and ornamental lakes and ponds, such as water features on golf courses. The composition includes a blend of two solid peroxygen compounds: sodium percarbonate and either sodium perborate tetrahydrate or sodium perborate monohydrate. An anticaking agent, such as calcium silicate may be added. The method includes administering the blend to the water by a variety of means, such as manual broadcasting or placing in a chemical feeding device.

Algaecidal compositions for water treatment and method of use thereof

Methods for the generation of non-equilibrium solutions of peroxyacetic acid are disclosed. These methods comprise introducing triacetin and aqueous hydrogen peroxide to water, mixing, and then adding an aqueous source of an alkali metal or earth alkali metal hydroxide. Triacetin is converted rapidly and with a high conversion rate into peracetic acid. These methods produce solutions with a high level of peracetic acid.

Methods and compositions for the generation of peracetic acid on site at the point-of-use

Methods of analyzing low levels of peroxyacetic acid (PAA) in water are described. These methods employ buffering the PAA-containing water and the use of a N,N-diethyl-p-phenylenediamine (DPD) indicator system in the presence of iodide ion. The intensity of the pink coloration that develops is quantitated by colorimetric or titrimetric methods and correlated to the ppm PAA in the water. Positive interference effects due to the presence of hydrogen peroxide are eliminated by performing the analyses quickly after the introduction of the reagents.

Method of analyzing low levels of peroxyacetic acid in water

Liquid and solid bromine-containing compositions are described. A liquid mixed halogen composition is also described. The highly concentrated liquid compositions and the high-activity solid compositions have excellent physical and chemical stability. The compositions are effective biocides in water treatment. Methods of preparing the compositions are also disclosed. These include combining a bromine compound in the oxidation state of −1 with hydrogen peroxide and a complexing agent followed by the addition of an alkaline source. The methods may further include the use of a solid organic or solid inorganic halogenating agent, conducting a solid-liquid separation, and adding an alkaline source.

Highly concentrated bromine compositions and methods of preparation

The invention includes convenient methods of preparing: (1) highly concentrated liquid bromine-containing biocidal solutions, (2) highly concentrated mixed halogen liquid bromine and chlorine-containing biocidal solutions, and (3) high-activity bromine-containing biocidal solids, all having excellent physical and chemical stability. One method yields solutions that have concentrations of bromine in excess of 18% as Br 2 (8% as Cl 2 ) in which the mole ratio of hydroxide ion to hydrogen ion source is at least 1.9:1. Another method employs elemental bromine in conjunction with a solid organic or inorganic halogenating agent to yield halogen solutions at concentrations greater than 22.9% as Br 2 (10.2% as Cl 2 ). This method can be performed under conditions that exceed the solubility of the active ingredient such that it crystallizes and is recovered as a hydrated or anhydrous salt in good yield.

Methods for the preparation of concentrated aqueous bromine solutions and high activity bromine-containing solids

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