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Production
of yeast using acid-hydrolyzed cassava and poultry manure
extract
L. I. Osumah and N. J.
Tonukari*
Department of Biochemistry, Faculty of Science, Delta State
University, P. M. B. 1, Abraka, Delta State, Nigeria.
*Corresponding author. E-mail:
tonukari@gmail.com.
Accepted 16 April, 2010. |
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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.
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