Thermophilic anaerobic digestion of raw sugarcane vinasse

Autor(es)

Nunes Ferraz Junior, Antonio Djalma ^{[1, 2]} ; Koyama, Mirian H. ^[2] ; de Araujo Junior, Moacir M. ^[2] ; Zaiat, Marcelo ^{[1, 2]}

Afiliação do(s) autor(es)

^[1] CTBE Brazilian Bioethanol Sci & Technol Lab, CNPEM, Rua Giuseppe Maximo Scolfaro, 10-000 Bairro Guara, BR-13083970 Campinas, SP - Brazil

^[2] Univ Sao Paulo, Ctr Res Dev & Innovat Environm Engn, Sao Carlos Sch Engn EESC, Biol Proc Lab, Engn Ambiental Bloco 4-F, Av Joao Dagnone, BR-13563120 Sao Carlos, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: RENEWABLE ENERGY; v. 89, p. 245-252, APR 2016.
• Citações Web of Science: 31

Resumo

The application of thermophilic anaerobic digestion is a logical choice for the treatment of sugarcane vinasse (industrial wastewater from ethanol production) because this process enables the recovery of energy as hydrogen and methane without requiring energy for heat or interfering in its quality as a bio-fertilizer. Thus, this study evaluated the performance of thermophilic methanogenic up-flow sludge blanket reactors (UASB) operating continuously in single-stage (UASB I) and two-stage (UASB II) systems vinasse during the sugarcane harvesting season (180 days). The maximum methane yields were 250.9 NmL-CH4.g(-1)COD(removed) and 316.0 NmL-CH4.g(-1)COD(removed) for UASB I and II, respectively, corresponding to 71.7% and 90.3% of the maximum theoretical methane yield (350 NmL-CH4.g(-1)COD(removed)()). Furthermore, the energy production from the two-stage system was 25.7% higher than the single-stage system, indicating the need for an acidogenic phase to improve both the removal of organic matter and energy extraction from sugarcane vinasse. (C) 2015 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: 13/15665-8 - Estrutura e dinâmica funcional da comunidade microbiana de digestores anaeróbios, aplicados à recuperação de energia e adequação ambiental de resíduos gerados no processo produtivo do bioetanol de 1ª e 2ª geração
• Beneficiário: Antônio Djalma Nunes Ferraz Júnior
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado