Methane Production by Co-Digesting Vinasse and Whey in an AnSBBR: Effect of Mixture Ratio and Feed Strategy

Autor(es)

Lovato, Giovanna ^[1] ; Albanez, Roberta ^[1] ; Triveloni, Marianne ^[1] ; Ratusznei, Suzana M. ^[1] ; Rodrigues, Jose A. D. ^[1]

Afiliação do(s) autor(es)

^[1] Maua Inst Technol EEM IMT, Maua Sch Engn, Praca Maua 1, BR-09580900 Sao Caetano do Sul, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Applied Biochemistry and Biotechnology; v. 187, n. 1, p. 28-46, JAN 2019.
• Citações Web of Science: 3

Resumo

The most common approach to deal with vinasse (sugarcane stillage) is fertigation, but this technique compromises soil structure and surrounding water bodies. A possible solution is to transport vinasse to local cheese whey producers and perform the co-digestion of these wastewaters together, reducing their organic load and generating bioenergy. Therefore, this study investigated the application of an AnSBBR (anaerobic sequencing batch biofilm reactor) operated in batch and fed-batch mode, co-digesting vinasse and whey at 30 degrees C. The effect of influent composition and feeding strategy was assessed. In all conditions, the system achieved high organic matter removal (approximately 83%). Increasing the percentage of vinasse from 0 to 100% in the influent resulted in a decrease in methane productivity (76.3 to 51.1 molCH(4) m(-3) day(-1)) and yield (12.7 to 9.1 molCH(4) kgCOD(-1)), but fed-batch mode operation improved reactor performance (73.0 molCH(4) m(-3) day(-1) and 11.5 molCH(4) kgCOD(-1)). From the kinetic metabolic model, it was possible to infer that, at the best condition, methane is produced in a similar way from the acetoclastic and hydrogenotrophic routes. A scheme of four parallel reactors with a volume of 16,950m(3) each was proposed in the scale-up estimation, with an energy recovery estimated in 28,745MWh per month. (AU)

• Processo FAPESP: 15/08403-2 - Produção de biometano em AnSBBR a partir da co-digestão de vinhaça e soro de leite
• Beneficiário: Marianne Triveloni
• Modalidade de apoio: Bolsas no Brasil - Iniciação Científica
• 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
• Processo FAPESP: 14/07692-8 - Produção de biohidrogênio e biometano em AnSBBR a partir da co-digestão de glicerina e soro de leite
• Beneficiário: Giovanna Lovato
• Modalidade de apoio: Bolsas no Brasil - Doutorado