Dark fermentative biohydrogen production from synthetic cheese whey in an anaerobic structured-bed reactor: Performance evaluation and kinetic modeling

Autor(es)

Blanco, V. M. C. ^[1] ; Oliveira, G. H. D. ^[1] ; Zaiat, M. ^[1]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, Ctr Res Dev & Innovat Environm Engn, Sao Carlos Sch Engn, Lab Biol Proc, 1100 Joao Dagnone Ave, BR-13563120 Sao Carlos, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: RENEWABLE ENERGY; v. 139, p. 1310-1319, AUG 2019.
• Citações Web of Science: 4

Resumo

This study investigated the potential of dark fermentative hydrogen production from cheese whey in an acidogenic anaerobic structured-bed reactor (ASTBR). The reactor was operated at 25 degrees C with an organic loading rate (OLR) of 24 kg COD m(-3) d(-1) and a hydraulic retention time (HRT) of 24 h. The ASTBR had an average volumetric hydrogen production rate (VHPR) of 1.6 +/- 0.7 L H-2 L-1 d(-1) and an average hydrogen yield (HY) of 1.4 +/- 0.7 moL H-2 mol(-1) of consumed lactose. Batch experiments were performed with biomass from the ASTBR to characterize the main metabolic transformations involved in hydrogen production. An ADM1-based, unstructured kinetic model was developed and fitted to the obtained temporal profiles. The model allowed a satisfactory description of the process and indicated that hydrogen production from lactate and acetate could explain 74.5% of the total hydrogen volume produced. Because lactic-acid-producing bacteria are expected to ultimately colonize acidogenic reactors treating cheese whey, optimizing electron flow through this pathway may be a suitable strategy to enable long-term hydrogen production from cheese whey using mixed-culture fermentation. (C) 2019 Elsevier Ltd. All rights reserved. (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: 15/06246-7 - Aplicação do conceito de biorrefinaria a estações de tratamento biológico de águas residuárias: o controle da poluição ambiental aliado à recuperação de matéria e energia
• Beneficiário: Marcelo Zaiat
• Modalidade de apoio: Auxílio à Pesquisa - Temático