Research Article

Amino Acid and Proximate Composition of Saccharomyces cerevisiae Biomass Cultivated in Cassava Mill Effluents  

Sylvester Chibueze Izah , Sunday Etim Bassey , Elijah Ige Ohimain
Department of Biological Sciences, Faculty of Science, Niger Delta University, Wilberforce Island, Bayelsa State, Nigeria
Author    Correspondence author
Molecular Microbiology Research, 2017, Vol. 7, No. 3   doi: 10.5376/mmr.2017.07.0003
Received: 16 Oct., 2017    Accepted: 24 Nov., 2017    Published: 08 Dec., 2017
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This is an open access article published under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Preferred citation for this article:

Izah S.C., Bassey S.E., and Ohimain E.I., 2017, Amino acid and proximate composition of Saccharomyces cerevisiae biomass cultivated in Cassava mill effluents, Molecular Microbiology Research, 7(3): 20-29 (doi: 10.5376/mmr.2017.07.0003)


Cassava mill effluent (CME) is generated during cassava processing into cassava flake or gari. The effluents affects the quality of the receiving environment such soil. It is could affect domestic animals such as goat and sheep when they ingest it, and retard normal growth and productivity of plants in the affected soil. This study evaluated amino acid and proximate composition of Saccharomyces cerevisiae cultivated in cassava mill effluents. S. cerevisiae used in this study was isolated from palm wine based on cultural, morphological, and physiological/biochemical characteristics. 10 ml of S. cerevisiae broth was inoculated into 100ml of sterile cassava mill effluents filtered with double muslin cloth. The medium was shaken intermittently between 7.00 to 19.00 hours’ time interval. The medium was decanted and subsequently filtered using Whatman filter paper. The resultant biomass was washed with distilled water and re-filtered. The sludge/biomass recovered were oven dried. Amino acid and proximate composition of the yeast biomass produced was analyzed using spectrophotometer. Proximate composition was also analyzed following standard procedure. Result showed that the total essential amino acid (40.88 g/100 g) was slightly higher than the Food and Agricultural Organization/World Health Organization (FAO/WHO) standard for feed use. While the total non-essential amino acid (21.56 g/100 g) was lower than FAO/WHO limits. Mean proximate composition was 17.01% (crude protein), 7.34% (ash), 56.40% (carbohydrate) and 407.13 kcal/100 g (calorific value/energy content). The findings of this study showed that during fermentation of cassava mill effluents with S. cerevisiae an appreciable amount protein is enriched considering the fact that the substrate is a waste.

Amino acid; Biotechnology advances; Cassava mill effluents; Waste
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