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Journal of Applied Sciences and Environmental Management
World Bank assisted National Agricultural Research Project (NARP) - University of Port Harcourt
ISSN: 1119-8362
Vol. 9, No. 1, 2005, pp. 25-30
Bioline Code: ja05005
Full paper language: English
Document type: Research Article
Document available free of charge

Journal of Applied Sciences and Environmental Management, Vol. 9, No. 1, 2005, pp. 25-30

 en Activity of Zymomonas check for this species in other resources species in palm-sap obtained from three areas in Edo State, Nigeria.


The bacterium Zymomonas mobilis check for this species in other resources was isolated from fresh palm-sap samples from three different locations as to determine the contribution of the bacterial isolate to alcohol production in palm-wine. Carbohydrate (sugar) fermentation, alcohol tolerance, and growth of the bacterium at different pH and temperature values were determined; and a comparison of sugar fermentation by Z. mobilis and Saccharomyces cerevisiae check for this species in other resources was also determined. Z. mobilis contributes much to the fermentation of palm-wine due to its ability to ferment sucrose, glucose and fructose which are the main sugars in palm-sap. The bacterium reached its maximum density of 2.72 x 107 cells/ml between 12 and 15 hrs after tapping of the palm-sap. Z. mobilis is acid and alcohol tolerant being able to grow at pH values between 4.0 and 7.0 and in alcohol concentration of between 2.5% and 15% respectively. Z. mobilis was also found to ferment sugars at a faster rate than Saccharomyces cerevisiae. Statistical analysis of the data obtained using ANOVA showed that there is no significant difference at p = 0.05 level of significance in the growth of isolates of Z. mobilis obtained from the three locations under different pH, alcohol and temperature values. @JASEM

© © 2005 Journal of Applied Sciences & Environmental Management

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