Co-Culture of Filamentous Feed-Grade Fungi and Microalgae as an Alternative to Increase Feeding Value of Ethanol Coproducts

Autor(es)

Rodrigues Reis, Cristiano E. ^{[1, 2]} ; D'Otaviano, Larissa Ogero ^{[1, 2]} ; Rajendran, Aravindan ^[2] ; Hu, Bo ^[2]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Dept Chem Engn, Engn Sch Lorena, BR-12602810 Sao Paulo - Brazil

^[2] Univ Minnesota, Dept Bioprod & Biosyst Engn, Minneapolis, MN 55455 - USA

• Tipo de documento: Artigo Científico
• Fonte: FERMENTATION-BASEL; v. 4, n. 4 DEC 2018.
• Citações Web of Science: 1

Resumo

Distiller's grains, an important commodity in the feed and food chains, are currently underdosed in rations due to several factors, mainly nutrient imbalance. This study aimed to increase the linoleic acid content in distiller's grains and decrease the excess nutrients in stillage water by the use of an artificial lichen, composed of fungi, algae, and a supporting matrix. A maximum concentration of 46.25% of linoleic acid in distiller's grains was achieved with a combination of Mucor indicus and Chlorella vulgaris using corn-to-ethanol whole stillage as substrate. Microbial hydrolytic enzymes during fermentation were able to decrease the solids in whole stillage. Nitrogen depletion by microalgal uptake causes lipid-formation stress to Mucor indicus cells, increasing linoleic acid production to about 49% of the total lipids, potentially decreasing costs in the animal feed. The culture supernatant can potentially be recycled as process water to the ethanol fermentation tank, and enhanced distiller's grains can replace animal-specific diets. This would reduce exogenous enzyme use and supplementation of unsaturated fatty acids from other sources. (AU)

• Processo FAPESP: 16/10636-8 - Da fábrica celular à biorrefinaria integrada Biodiesel-Bioetanol: uma abordagem sistêmica aplicada a problemas complexos em micro e macroescalas
• Beneficiário: Roberto de Campos Giordano
• Modalidade de apoio: Auxílio à Pesquisa - Programa BIOEN - Temático
• Processo FAPESP: 17/12908-8 - Cultivo fúngico no vinhoto de cana-de-açúcar e desenvolvimento de uma plataforma de produtos de alto valor na indústria de etanol
• Beneficiário: Cristiano Eduardo Rodrigues Reis
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado