Start-up phase of a two-stage anaerobic co-digestion process: hydrogen and methane production from food waste and vinasse from ethanol industry

Autor(es)

Nathia-Neves, Grazielle ^[1] ; Neves, Thiago de Alencar ^[2] ; Berni, Mauro ^[3] ; Dragone, Giuliano ^[4] ; Mussatto, Solange I. ^[4] ; Forster-Carneiro, Tania ^[1]

Afiliação do(s) autor(es)

^[1] Univ Estadual Campinas, Fac Food Engn, Rua Monteiro Lobato, 80, BR-13083862 Campinas, SP - Brazil

^[2] Univ Estadual Campinas, Fac Civil Engn Architecture & Town Planning, Rua Saturnino de Brito, 224, BR-13083889 Campinas, SP - Brazil

^[3] Univ Estadual Campinas, Interdisciplinary Ctr Energy Planning NIPE, Rua Cora Coralina, BR-13083970 Campinas, SP - Brazil

^[4] Tech Univ Denmark, Novo Nordisk Fdn Ctr Biosustainabil, Bldg 220, DK-2800 Lyngby - Denmark

• Tipo de documento: Artigo Científico
• Fonte: BIOFUEL RESEARCH JOURNAL-BRJ; v. 5, n. 2, p. 813-820, SPR 2018.
• Citações Web of Science: 6

Resumo

The start-up conditions of mesophilic anaerobic co-digestion of restaurant food waste and vinasse, a waste from sugarcane industry, was investigated for efficient biogas production. A pilot plant, containing two reactors, was designed and used sequentially and semi-continuously for biogas production. All effective operational parameters were controlled in both reactors over the course of the study. The results indicated that the organic matters were quickly decreased during the start-up phase in the first reactor, resulting in 52% and 64% reduction in total solids and total volatile solids, respectively, while the corresponding reductions in the methanogenic reactor were 39.7% and 51.4%. The production of hydrogen was observed during the first 20 d of digestion, where the maximum concentration of 76.5% was detected after 8 d when the pH stood at 5.96. After 21 d of digestion, hydrogen concentration was decreased to less than 4.5%, while methane content was increased leading to an accumulated biogas yield of over 300 mL per g of total volatile solids. The high concentration of hydrogen in biogas was possibly due to the improvement in the growth of acidogenic bacteria in response to maintaining pH at their optimum value, leading to a more efficient organic residues hydrolysis. (C) 2018 BRTeam. All rights reserved. (AU)

• Processo FAPESP: 18/05999-0 - Waste2energy: integração das tecnologias supercrítica e digestão anaeróbia para gestão de águas e resíduos alimentares
• Beneficiário: Tânia Forster Carneiro
• Modalidade de apoio: Auxílio à Pesquisa - Regular
• Processo FAPESP: 11/19817-1 - Biorefinaria na indústria agroalimentar: reaproveitamento de resíduos para produção de novos compostos químicos e biohidrogênio
• Beneficiário: Tânia Forster Carneiro
• Modalidade de apoio: Auxílio à Pesquisa - Programa BIOEN - Jovens Pesquisadores