Method of cleaning dairy pipelines using enzyme pretreatment

a technology of enzyme pretreatment and cleaning method, which is applied in the direction of enzymology, detergent compounding agent, liquid cleaning, etc., can solve the problems of difficult removal, milk-borne proteinaceous materials on the surface of dairy equipment, and environmental problems caused by chlorine oxidizers

Inactive Publication Date: 2002-11-28
WEST AGRO
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  • Application Information

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Problems solved by technology

However, this inevitably causes deposition of milk-borne proteinaceous materials onto the surfaces of the dairy equipment.
Such proteinaceous soils are extremely tenacious and are difficult to remove without a combination of a strong oxidizer combined with high levels of alkalinity for fat removal.
However, chlorine oxidizers present environmental problems, and there is an ongoing effort to find substitute, non-chlorinated cleaning agents which match or exceed the cleaning power of the chlorinated materials while avoiding the adverse environmental impact thereof.
However, these references do not deal with commercial methods and systems where an enzymatic treatment is followed by an acid wash.

Method used

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Embodiment Construction

[0011] In this series of tests, dual phase enzyme prewash / acid wash trials were conducted using a commercially available enzyme formulation with different acids. In these tests, the following apparatus was employed: three 1 L beaker, stirring bars, 50 or 100 ml graduated cylinder, hot plate / stirrer, analytical balance weighing to the nearest 0.1 mg, laboratory oven thermostatted to 100-110.degree. C., laboratory oven thermostatted to 40.degree. C., 304 SS or glass panels measuring 3".times.6"0.037", having a 1 / 4" hole in one end.

[0012] The reagents used were xylene, isopropanol, one 12 oz. can evaporated milk, AOAC synthetic hard water (25 grains / gal. hardness), and analytical water. One enzyme formulation contained 20% by weight Purafect 4000L protease enzyme (Genecor, Inc.), 10% by weight propylene glycol USP, and 70% by weight low conductivity water. Other enzymes formulations used were experimental enzymes A, B and C made up of (where all percentages are by weight): A-Esperase 8...

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Abstract

Improved, non-chlorinated systems and methods for removing soils from hard surfaces are provided wherein such surfaces are initially contacted with a first aqueous use dispersion including a protease enzyme, followed by contact the surface with a second aqueous acidic use dispersion. The enzyme dispersion preferably includes a polyol such as propylene glycol and in use is heated to a temperature up to about 120° C. The acid dispersion may include a surfactant and is also used in a heated condition. The two-component systems of the invention can be used for CIP treatment of dairy or other equipment in lieu chlorinated cleaning agents.

Description

[0001] 1. Field of the Invention[0002] The present invention is broadly concerned with improved, two-component systems and methods for removing proteinaceous soils from surfaces, including an enzymatic prewash and an acidic secondary wash. More particularly, the invention is concerned with such systems and methods which are especially suited for clean-in-place (CIP) treatment of dairy equipment subject to milk-borne contamination, wherein the initial prewash includes a protease enzyme, preferably in combination with a polyol, whereas the secondary acid wash includes an acid, advantageously combined with a surfactant.[0003] 2. Description of the Prior Art[0004] During dairy processing of milk, heat sterilization is performed in order to prevent microbial contamination. However, this inevitably causes deposition of milk-borne proteinaceous materials onto the surfaces of the dairy equipment. Such proteinaceous soils are extremely tenacious and are difficult to remove without a combinat...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): B08B3/08C11D3/02C11D3/04C11D3/20C11D3/386C11D11/00C12N9/20C12N9/50C12S9/00
CPCC11D3/042C11D3/2075C11D11/0064C11D11/0041C11D3/38618
Inventor MONKEN, ALAN R.
Owner WEST AGRO
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