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- Title
PRELIMINARY INVESTIGATIONS ON THE USE OF POTATO WASTEWATER FOR LACTIC ACID BACTERIA AND SACCHAROMYCES CEREVISIAE SINGLE AND MIXED CULTIVATION.
- Authors
Mironescu, Monica; Moza, Maria Iazmina
- Abstract
In this paper a process for capitalisation of the industrial wastewater as substrate for microorganisms was investigated. Attempts were made to exploit wastewater resulted at the potato processing for chips or fries production, as a raw material, because of its valuable content in starch and proteins. Two types of experiments were made: with and without starch enzymatic hydrolysis and the enzyme used for hydrolysis was a β-amylase from barley (Optimalt BBA). For each type of experiment, two types of microorganisms were used: lactic acid bacteria (LAB) from the genera Streptococcus and Lactobacillus and yeast Saccharomyces cerevisiae in monoculture or mixed cultures. The starch and reducing sugars content, the variation of pH and the production of alcohol were analysed. The results indicated that PWW is a valuable substrate for both types of microorganisms and can be used for their cultivation. When starch-degrading enzymes were added in the initial PPW substrate, the yeast Saccharomyces cerevisiae was stimulated to grow and to produce alcohol to concentrations around 0.3% in the conditions used. In the absence of enzymes, LABs were favoured and pH decreased to values around 4.7.
- Subjects
POTATO waste; INDUSTRIAL wastes; LACTIC acid; SACCHAROMYCES cerevisiae; AMYLASES
- Publication
Annals of the Romanian Society for Cell Biology, 2011, Vol 16, Issue 1, p349
- ISSN
2067-3019
- Publication type
Article