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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.)

Seasonal characterization of sugarcane vinasse: Assessing environmental impacts from fertirrigation and the bioenergy recovery potential through biodigestion

Texto completo
Autor(es):
Fuess, Lucas Tadeu [1] ; Garcia, Marcelo Loureiro [2] ; Zaiat, Marcelo [1]
Número total de Autores: 3
Afiliação do(s) autor(es):
[1] Univ Sao Paulo, Sao Carlos Sch Engn EESC, Biol Proc Lab LPB, Av Joao Dagnone 1100, BR-13563120 Sao Carlos, SP - Brazil
[2] Sao Paulo State Univ UNESP, Inst Geosci & Exact Sci IGCE, Campus Rio Claro, Av 24-A, 1515, BR-13506900 Rio Claro, SP - Brazil
Número total de Afiliações: 2
Tipo de documento: Artigo Científico
Fonte: Science of The Total Environment; v. 634, p. 29-40, SEP 1 2018.
Citações Web of Science: 15
Resumo

Sugarcane vinasse has been widely used as a soil fertilizer in the Brazilian sucro-alcohol industry for recycling potassium and water. However, the potential negative effects fromlong-termsoil fertirrigation represent a major drawback regarding this practice, whereas the application of biodigestion represents an efficient method for reducing the polluting organic load and recovering bioenergy from vinasse. Regardless of the predicted use for vinasse, an understanding of the potential of each option is imperative, as the seasonal alterations in the inorganic/organic fractions of vinasse directly affect itsmanagement. In this context, this study presents a detailed compositional characterization of sugarcane vinasse from a large-scale Brazilian biorefinery throughout the 2014/2015 harvest to assess the environmental effects (due to fertirrigation) and to estimate the biogas energetic potential. Calculated inputs of organic matter into soils due to vinasse land application were equivalent to the polluting load of populations (117-257 inhab ha(-1)) at least 2-fold greater than the largest Brazilian capital cities (78-70 inhab ha(-1)). Two-phase biodigestion could efficiently reduce the polluting load of vinasse (23-52 inhab ha(-1)) and eliminate the negative effects from direct sulfide emissions in the environment. However, a high risk of soil sodification could result from using high doses of Na-based alkalizing compounds in biodigestion plants. Finally, the optimized recovery of bioenergy through biogas (13.3-26.7 MW as electricity) could supply populations as large as 305 thousand inhabitants, so that over 30% of the surplus electricity produced by the studied biorefinery could be obtained from biogas. Overall, applying biodigestion in the treatment of vinasse provides important environmental and energetic gains. However, the benefits of reducing the polluting organic load of vinasse through bioenergy recovery may lose their effect depending on the alkalizing strategy, indicating that the proper use of chemicals in full-scale biodigestion plants is imperative to attain process sustainability. (C) 2018 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