Production of protein-enriched banana peelings for animal feed ingredient
2000
Pahm, C.B. | Dante, J.A. (Philippines Univ. Los Banos, College, Laguna (Philippines). National Inst. of Molecular Biology and Biotechnology)
High carbohydrate, low protein and high tannin contents of banana peeling wastes from the food processing company disposal around the country posed several environmental problems for the social health communities. These raw materials could be beneficial to food companies if it will be processed into animal feed. The objective of this study is to convert the high tannin-carbohydrates into more digestible protein feed ingredient using solid state fermentation (SSF) process. Total of 44 selected fungal strains and isolates were screened for protein enrichment of banana peelings with low tannin and more soluble substances of products. The criteria of selection were the whitish color, rapidity of growth in the SSF process, high protein content and no toxic compounds in the final product. The following microbial strains obtained were Aspergillus niger BIOTECH 3104, and its auxotrophs 1031 and 1032B, A. niger BIOTECH 3105 and A. oryzae BIOTECH 3078 and KBN 616. Based on the protein, the crude protein (CP) content of dried product from banana peelings fermented with A. niger BIOTECH 3104 had increased from 7.25% in raw material to 31.90% in the fermented products after 3 days of SSF process. On the other hand, the water-soluble substances increased from 22% to 32% in the raw materials to final product. Feeding toxicity study on mice revealed that 50% substitution of soybean meal by protein-enriched banana peelings in their diets could be formulated without adverse effect on the growth performance of mice during the feeding trial
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