Effects of Different Carbon Sources for High Level Lactic Acid Production by Lactobacillus casei

Abstract:

The fermentation process utilization to produce lactic acid has been studied from carbohydrate source and another source because of several significant reasons. Above all the production of biotechnology construction is found to be less costly compared to chemical synthesis. The production of biodegradable lactic polymer from lactic acid utilization of raw material can easily be obtained from industrial wastes such as pineapple waste. The process can positively affect the environment by reducing the environmental problems. The aim of this study is to estimate the effects of glucose concentration of pineapple wastewater as the carbon source on the volume of Lactobacillus casei (L. casei) subspecies in producing lactic acid. Five different glucose concentrations as carbon source are used for production of high lactic acid in the fermentation process using L. casei. L. casei could be ingesting the glucose presented within the levels tested and converts all into lactic acid. The result shows efficient yields of 0.09 g lactic acid/g glucose. The highest level of lactic acid is at 125.71 g/l and was obtained from 100 % pineapple waste medium. When the carbon source is at 4 g/l, the level of lactic acid is decreased to 84.22 g/l. The fermentation time increases with the increment of sugars. It is more than double if the medium is composed of 100 % of pineapple waste. Therefore pineapple waste is the best alternative as carbon source for bacteria growth because it is more cost effective.

• Periodical: Applied Mechanics and Materials (Volume 695)
• Pages: 220-223
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.695.220
• Online since: November 2014
• Authors: Saber Salem Hassan, Roslinda Bt Abd Malek, Asliaty Atim, Suzi Salwah Jikan, Siti Fatimah Zaharah Mohd Fuzi*
• Keywords: Carbon Source, Fermentation, Glucose, Lactic Acid, Lactobacillus casei

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