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Combined Biogas and Bioethanol Production: Opportunities and Challenges for Industrial Application

Sanitary Environmental Engineering Division (SEED), Department of Civil Engineering, University of Salerno, via Giovanni Paolo II, 84084 Fisciano (SA), Italy
Author to whom correspondence should be addressed.
Academic Editor: Thomas E. Amidon
Energies 2015, 8(8), 8121-8144;
Received: 8 May 2015 / Revised: 3 July 2015 / Accepted: 21 July 2015 / Published: 5 August 2015
(This article belongs to the Special Issue Bioenergy and Biorefining)
PDF [402 KB, uploaded 5 August 2015]


In the last decades the increasing energy requirements along with the need to face the consequences of climate change have driven the search for renewable energy sources, in order to replace as much as possible the use of fossil fuels. In this context biomass has generated great interest as it can be converted into energy via several routes, including fermentation and anaerobic digestion. The former is the most common option to produce ethanol, which has been recognized as one of the leading candidates to substitute a large fraction of the liquid fuels produced from oil. As the economic competitiveness of bioethanol fermentation processes has to be enhanced in order to promote its wider implementation, the most recent trends are directed towards the use of fermentation by-products within anaerobic digestion. The integration of both fermentation and anaerobic digestion, in a biorefinery concept, would allow the production of ethanol along with that of biogas, which can be used to produce heat and electricity, thus improving the overall energy balance. This work aims at reviewing the main studies on the combination of both bioethanol and biogas production processes, in order to highlight the strength and weakness of the integrated treatment for industrial application. View Full-Text
Keywords: anaerobic digestion; biorefinery; digestate; energy; fermentation; stillage anaerobic digestion; biorefinery; digestate; energy; fermentation; stillage

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Cesaro, A.; Belgiorno, V. Combined Biogas and Bioethanol Production: Opportunities and Challenges for Industrial Application. Energies 2015, 8, 8121-8144.

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