The amino acids profiles of biodegraded brewers spent grains (BSG) were determined. The
analysis revealed the presence of 17 amino acids including the major amino acids (cysteine, lysine and
methionine) required in poultry nutrition. The concentrations of the amino acids however varied with the
microbial species used in the degradation process. After 10 days of solid state fermentation at room
temperature glusine, alanine and phenyalanine were detected at very high concentration in
Aspergillus niger
TF-4 degraded BSG. Glusine, alanine and proline were the major amino acid components of BSG degraded
by
Saccharomyces cerevisiae
FP-4, while glusine, alanine and leucine were found to be the major components
of BSG degraded by
Streptomyces
sp UU-2. The concentrations of the required amino acids except lysine
were short of the standard requirement for poultry. However their concentrations were positively affected
over time by biodegradation.
