Lowering the inhibition of sugarcane vinasse as a culture medium for oleaginous fungi through oxidative pre-treatment aiming at the degradation of toxic compounds

Autor(es)

Rodrigues Reis, Cristiano E. ^[1] ; Carvalho, Ana K. F. ^[1] ; Bento, Heitor B. S. ^[1] ; Alves, Thiago M. ^[1] ; de Castro, Heizir F. ^[1]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Engn Sch Lorena, Estr Municipal Campinho S-N, Sao Paulo 12602810 - Brazil

• Tipo de documento: Artigo Científico
• Fonte: JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY; v. 95, n. 11 MAY 2020.
• Citações Web of Science: 0

Resumo

BACKGROUND The utilization of vinasse as a feasible culture medium for fungi is hindered by the presence of inhibitory compounds, such as phenols and other recalcitrant structures. This work analyzes the effect of different homogeneous advanced oxidation processes (AOP) to lower the concentration of inhibitory phenolic compounds in vinasse, and to test the effects of the pre-treatment on the growth of an oleaginous fungal strain. Vinasse was treated using a batch system with the addition of ferrous ion (Fe2+) (Fenton), in the presence of UV, and with the addition of hydrogen peroxide (H2O2). RESULTS All of the reaction systems were able to partially degrade the chemical oxygen demand, ranging from 18.4% up to 54.1% in the factorial results. The pre-treated vinasse samples were assayed for the growth performance of Mucor circinelloides, demonstrating that the control value of 3.54 g L-1 was increased to values as high as 4.84 g L-1, also followed by an increase of approximate to 73% in terms of lipid productivity. CONCLUSION Different AOP were tested to degrade phenolic compounds present in vinasse, demonstrating that the optimum condition (Fe2+/UV at alkaline pH) provided a culture medium for M. circinelloides that increased the biomass accumulation by approximate to 35% and the lipid productivity by >70% when compared to the control. (c) 2020 Society of Chemical Industry (AU)

• 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
• 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: 19/08997-0 - Processos oxidativos avançados como ferramentas para diminuição da toxicidade de vinhaça visando o cultivo de fungos filamentosos
• Beneficiário: Thiago Maziero Alves
• Modalidade de apoio: Bolsas no Brasil - Iniciação Científica