ISSN 2756-3863
International Journal of Manures and Fertilizers Vol. 1 (10), pp. 185-190 October, 2012. © International Scholars Journals
Full Length Research Paper
Manufacture of yeast using acid-hydrolyzed cassava and poultry manure extract
Yakubu Aimiuhi and Okosun Oluwatobi
Department of Crop Science, Faculty of Agriculture, Ambrose Alli University, Edo State, Nigeria. E-mail: [email protected]
Accepted 1 September, 2012
Abstrsact
Cassava is made up of starch as its major nutritive reserve. Starch which is one of the most important products synthesized by plants is consumed as food and can be used in industrial processes. This investigation seeks to explore the availability of cassava as a source of glucose as well as poultry manure as a source of nitrogen in the production of yeast. Cassava flour was hydrolyzed with 0.5% (v/v) concentrated H2SO4 as carbon source for the production of yeast. It was found that pH 6.5 gave optimum yeast growth. Increased concentrations of acid-hydrolyzed cassava and poultry manure extracts led to significant (P < 0.05) increase in yeast biomass after 36 h culture. The residual glucose concentration was also determined and was found to be significantly (P < 0.05) increased with increase in the concentration of poultry manure extract. Therefore, yeast can be produced using acid hydrolyzed cassava flour as carbon source with poultry manure extract as nitrogen source. The methods described in this work can be used in the development of a rapid method of producing glucose and simple sugars from cassava through acid hydrolysis and combining this with poultry manure for yeast production.
Key words: Yeast, poultry manure extract, acid-hydrolyzed cassava.