Effect of supplementation of African breadfruit (Treculia africana) hulls with organic wastes on growth characteristics of Saccharomyces cerevisiae

Abstract

African breadfruit (Treculia africana) hulls were supplemented at different levels with other organic food processing wastes (orange, plantain, cassava and soybean). Optimum supplementation of 40:60 (breadfruit hulls to each waste) was obtained. Proximate and mineral composition of the unsupplemented and the supplemented waste were determined. A synthetic medium with chemical nutrients was prepared. The growth performance and other fermenting parameters were monitored on test strain (Saccharomyces cerevisiae) incubated at predetermined pH (3.8) and temperature (27°C) conditions. Supplementation increased crude protein (4.38 – 8.31 g/100 g) and mineral content (Na, K and P) in the waste, and sugar concentration (4.44 – 4.56 g/l), sugar conversion efficiency (28.39 –31.56%), biomass yield (11.0 – 30.1 g/l) and single cell protein (28.98- 34.26 g/100g) in the hydrolysate.
Supplementation of the African breadfruit hulls with organic wastes was an improvement over the unsupplemented breadfruit medium and could promote use in the animal feed industry