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(Referência obtida automaticamente do Web of Science, por meio da informação sobre o financiamento pela FAPESP e o número do processo correspondente, incluída na publicação pelos autores.)

Designing full-scale biodigestion plants for the treatment of vinasse in sugarcane biorefineries: How phase separation and alkalinization impact biogas and electricity production costs?

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Autor(es):
Fuess, Lucas Tadeu ; de Araujo Junior, Moacir Messias ; Garcia, Marcelo Loureiro ; Zaiat, Marcelo
Número total de Autores: 4
Tipo de documento: Artigo Científico
Fonte: CHEMICAL ENGINEERING RESEARCH & DESIGN; v. 119, p. 209-220, MAR 2017.
Citações Web of Science: 14
Resumo

Anaerobic digestion (AD) is the most suitable approach for the management of vinasse in sugarcane distilleries because both environmental adequacy and bioenergy recovery could be achieved through biogas production. Because the literature lacks data on the implementation and operation of full-scale AD plants for enhanced energy recovery from vinasse, this study presents different designs for AD plants applied to vinasse in large-scale distilleries, considering both single- and two-phase schemes and different alkalizing strategies. Investment and operating costs and biogas and electricity production costs were obtained for each case. The results indicate that phase separation is economically feasible when scaling up AD plants in biorefineries. Despite the higher capital and operating costs in such schemes, the estimated biogas and electricity production costs reached equivalent or lower values compared with those of single-phase AD layouts, depending on the alkalizing strategy used. With respect to the alkalizing strategy, the best results were associated with sodium hydroxide dosing and/or effluent recirculation, with electricity costs reaching values 1.8- to 2.3-fold lower than grid electricity. In contrast, the competitive use of sodium bicarbonate in AD plants for treating vinasse requires further dosing optimization. (C) 2017 Institution of Chemical Engineers. Published by Elsevier B.V. All rights reserved. (AU)

Processo FAPESP: 12/15606-9 - Biodigestão anaeróbia termofílica de vinhaça em sistemas combinados do tipo acidogênico-metanogênico para potencialização da recuperação de bioenergia em biorrefinarias de cana-de-açúcar de primeira geração
Beneficiário:Lucas Tadeu Fuess
Linha de fomento: Bolsas no Brasil - Doutorado
Processo FAPESP: 09/15984-0 - Produção de bioenergia no tratamento de águas residuárias e adequação ambiental dos efluentes e resíduos gerados
Beneficiário:Marcelo Zaiat
Linha de fomento: Auxílio à Pesquisa - Temático