etals addition for enhanced hydrogen, acetic and butyric acids production from cellulosic substrates by Clostridium butyricu

Autor(es)

Braga, Juliana Kawanishi ^[1] ; Stancari, Rafaela Arantes ^[1] ; Motteran, Fabricio ^[1] ; Malavazi, Iran ^[2] ; Varesche, Maria Bernadete Amancio ^[1]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Sao Carlos Sch Engn, Dept Hydraul & Sanitat, Av Trabalhador Saocarlense 400, BR-13566590 Sao Carlos, SP - Brazil

^[2] Univ Fed Sao Carlos, Dept Genet & Evolut, Sao Carlos, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: BIOMASS & BIOENERGY; v. 150, JUL 2021.
• Citações Web of Science: 2

Resumo

The influence of Fe (Iron), Ni (Nickel) and Se (Selene), important cofactors for hydrogenase (hyd), was evaluated in the bioproduction of H2, volatile organic acids (VOA) and alcohols using Clostridium butyricum as inoculum and 5 g/L of cellulose, glucose or sugarcane bagasse (SCB) in batch reactors at 37 degrees C. Conditions A (25 mu M Fe), B (25 mu M Fe + 1 mu M Ni), C (25 mu M Fe + 1 mu M Ni + 1 mu M Se) and D (with no metal addition) using cellulose and glucose were performed to optimize the culture medium. H2 production was favored in condition A being around 16 mmol/L and 6 mmol/L for glucose and cellulose, respectively. The predominance of butyric acid was observed in all experimental series with cellulose and glucose. On the other hand, acetic acid was predominant in the SCB assay. The presence of other bacteria in SCB may have contributed to the change in the route of the final metabolites. The results suggested the possibility of improving H2 and OA production by C. butyricum supplementing the medium with Fe using SCB as substrate source. (AU)

• Processo FAPESP: 09/15984-0 - Produção de bioenergia no tratamento de águas residuárias e adequação ambiental dos efluentes e resíduos gerados
• Beneficiário: Marcelo Zaiat
• Modalidade de apoio: Auxílio à Pesquisa - Temático
• Processo FAPESP: 13/20196-7 - Hidrólise do bagaço de cana-de-açúcar para a produção de hidrogênio e biogás com biomassa suspensa e imobilizada em nanocoatings
• Beneficiário: Juliana Kawanishi Braga
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado