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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Economics of anaerobic digestion for processing sugarcane vinasse: Applying sensitivity analysis to increase process profitability in diversified biogas applications

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Fuess, Lucas Tadeu [1] ; Zaiat, Marcelo [1]
Total Authors: 2
[1] Univ Sao Paulo LPB EESC USP, Biol Proc Lab, Sao Carlos Sch Engn, Av Joao Dagnone 1100, BR-13563120 Sao Carlos, SP - Brazil
Total Affiliations: 1
Document type: Journal article
Web of Science Citations: 4

Anaerobic digestion (AD) is the most suitable approach for managing vinasse, the main wastewater from ethanol production, based on potential biogas applications. However, despite significant improvements in both scientific and technological aspects of the AD of vinasse, specific aspects of the global process require a better understanding to facilitate the scale-up of treatment systems. In this context, this study aimed to identify the main factors that affect the economic performance of the AD of vinasse in sugarcane biorefineries using a techno-economic approach. The energy recovery potential, as well as economic parameters were obtained for different biogas applications. Sensitivity analysis was also used to assess the impacts of different factors on the profitability of the process. Overall, biomethane production economically outperformed electricity generation, regardless of the biorefinery type (autonomous or annexed) and AD layout (single- or two-phase). In turn, investment costs on AD-power plants and product (electricity or biomethane) prices characterized the primary factors governing the economic performance of biogas reuse, regardless of the proposed application. These results confirm the key role of external agents in encouraging the implementation of AD plants in ethanol biorefineries by establishing specific funding for biogas projects, imposing environmental restrictions and/or developing competitive AD-related technological packages. (C) 2017 Institution of Chemical Engineers. Published by Elsevier B.V. All rights reserved. (AU)

FAPESP's process: 12/15606-9 - Thermophilic anaerobic biodigestion of vinasse in combined acidogenic-methanogenic systems to enhance bioenergy recovery in first generation sugarcane biorefineries
Grantee:Lucas Tadeu Fuess
Support type: Scholarships in Brazil - Doctorate
FAPESP's process: 09/15984-0 - Bioenergy production from wastewaters and environmental fitting of liquid and solid wastes generated
Grantee:Marcelo Zaiat
Support type: Research Projects - Thematic Grants