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Controlling microbial contamination in alcoholic fermentation processes

A technology of microbial pollution and ethanol fermentation, which is applied in the direction of fermentation, biofuel, and growth stimulation by adding compounds, which can solve the problems of cost increase

Inactive Publication Date: 2012-01-11
ARCH CHEM INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The use of acid has a series of disadvantages, such as the need to provide equipment resistant to acid corrosion, the increased costs associated with the larger quantities of acid required to treat the large quantities of bacteria remaining in yeast that are reused, the toxicity of this acid input, and the need to extract from Scavenges acids from the by-products (dry yeast) of the fermentation process, especially when used to produce rations for animals

Method used

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  • Controlling microbial contamination in alcoholic fermentation processes

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Embodiment Construction

[0025] One of the above general objects can be achieved by providing an antimicrobial composition comprising: from about 1% to about 5% by weight of an antimicrobial agent of the guanidine family, such as polyhexaformin (PHMB); from about 0.05% to about 0.5% by weight biocide; and from about 98.95% to about 94.5% by weight surfactant.

[0026] Biocides are usually selected based on the characteristics of the fermented juice and the microflora of contaminating microbial contaminants found in said juice, as well as the environment of the raw material before it was added to the fermenter.

[0027] With regard to the fermentation of sugar cane juice ("garapa"), the antibiotic used to form the antimicrobial composition of the present invention may be an ionophore selected from the group consisting of virginiamycin, penicillin, penicillin V, clindamycin, alanine Acids, beta-lactams, tetracyclines and preferably monensins, known antibiotics from the company Elanco under the trade nam...

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Abstract

The control of the microbial contamination during the sugar fermentation in the processes for obtaining alcohol is a very important action to increase the productivity of the alcoholic fermentation processes. The Saccharomyces cerevisiae yeast cells engage a very tough nutritional competition for the sugarcane juice with the bacteria (Lactobacillus sp and Acetobacter) and the wild yeasts. The proposed composition uses an antimicrobial agent of the guanidine family, such as for example, poly(hexamethyl biguanide), an antibiotic agent, and also a surfactant agent, to prevent the undesired microbial growth. The present invention further refers to the process for controlling the microbial contamination through the use of said agents.

Description

technical field [0001] The present invention relates to an antimicrobial composition and a method of controlling microbial contamination in an ethanol fermentation process, particularly in the production of ethanol from sugarcane. Background technique [0002] Despite improvements in fermentation methods over the past few years, satisfactory results have not been achieved for contamination control because of the difficulty and high cost of controlling the contamination levels of the raw material to be fermented for pressing and processing into juice . [0003] Today, the nature of sugarcane processing in ethanol production presses typically results in the presence of bacterial microbiota, often exceeding 10 in fermented juices. 4 cells / ml. In addition, the same fruit juice, fruit juice is a medium that is conducive to the growth of bacteria. In addition to the fermenting yeast Saccharomyces cerevisiae, it also carries many kinds of bacterial pollutants, such as Lactobacill...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C12P7/06C12N1/38
CPCY02E50/17C12N1/18Y02E50/10
Inventor M·D·S·弗兰津M·R·普里奥利
Owner ARCH CHEM INC
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