Production of single cell protein from manure as animal feed by using photosynthetic bacteria

MicrobiologyOpen
Sirada Patthawaro, Chewapat Saejung

Abstract

To reduce the cost of protein feedstock for animal feed, the use of single cell protein (SCP) produced from waste of animal agriculture is an interesting choice. This study reveals that chicken manure was the best substrate for SCP production by submerged fermentation using photosynthetic bacteria compared to swine, cow, and buffalo manure. Regression analysis showed that the productions were found to be significantly influenced by chicken manure content, inoculum size, and cultivation time. Response surface methodology based on central composite design generated the optimal condition (15% chicken manure, 30% inoculum size and cultivation time for 14 days) at which biomass, protein, and carotenoid productions were increased by 92.3%, 21.6%, and 18.2%, respectively. The percentage of error between the predicted and actual values for biomass, protein, and carotenoid productions were 1.56%, 2.64%, and 2.09%, respectively, which indicates the precision of the model. To verify the quality of SCP, the bacterium was cultured in a photobioreactor to investigate amino acid composition, protein, and nucleic acid contents. The SCP yielded 62.7% protein with essential amino acids including lysine, methionine, threonine, phenylalanine, leuc...Continue Reading

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Citations

Jan 27, 2021·The Proceedings of the Nutrition Society·Andrew M Salter, Carlos Lopez-Viso
Jun 26, 2021·Transboundary and Emerging Diseases·Gerald C ShursonJennifer L G van de Ligt

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Methods Mentioned

BETA
protein assay

Software Mentioned

OVAT
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