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Review

Anaerobic Digestion for Producing Renewable Energy—The Evolution of This Technology in a New Uncertain Scenario

1
Chemical and Environmental Bioprocess Engineering Group, Natural Resources Institute (IRENA), Universidad de León, Av. de Portugal 41, 24009 León, Spain
2
Departamento de Química y Física Aplicadas, Campus de Vegazana, University of León, 24071 León, Spain
3
Escuela Superior Politécnica del Litoral (ESPOL), Facultad de Ingeniería en Ciencias de la Tierra, Guayaquil EC090112, Ecuador
*
Author to whom correspondence should be addressed.
Entropy 2021, 23(2), 145; https://doi.org/10.3390/e23020145
Received: 28 December 2020 / Revised: 18 January 2021 / Accepted: 20 January 2021 / Published: 25 January 2021
Anaerobic digestion is a well-known technology with wide application in the treatment of high-strength organic wastes. The economic feasibility of this type of installation is usually attained thanks to the availability of fiscal incentives. In this review, an analysis of the different factors associated with this biological treatment and a description of alternatives available in literature for increasing performance of the process were provided. The possible integration of this process into a biorefinery as a way for producing energy and chemical products from the conversion of wastes and biomass also analyzed. The future outlook of anaerobic digestion will be closely linked to circular economy principles. Therefore, this technology should be properly integrated into any production system where energy can be recovered from organics. Digestion can play a major role in any transformation process where by-products need further stabilization or it can be the central core of any waste treatment process, modifying the current scheme by a concatenation of several activities with the aim of increasing the efficiency of the conversion. Thus, current plants dedicated to the treatment of wastewaters, animal manures, or food wastes can become specialized centers for producing bio-energy and green chemicals. However, high installation costs, feedstock dispersion and market distortions were recognized as the main parameters negatively affecting these alternatives. View Full-Text
Keywords: biogas valorization; lignocellulosic pre-treatment; techno-economic performance; process integration; energy production biogas valorization; lignocellulosic pre-treatment; techno-economic performance; process integration; energy production
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MDPI and ACS Style

Sevillano, C.A.; Pesantes, A.A.; Peña Carpio, E.; Martínez, E.J.; Gómez, X. Anaerobic Digestion for Producing Renewable Energy—The Evolution of This Technology in a New Uncertain Scenario. Entropy 2021, 23, 145. https://doi.org/10.3390/e23020145

AMA Style

Sevillano CA, Pesantes AA, Peña Carpio E, Martínez EJ, Gómez X. Anaerobic Digestion for Producing Renewable Energy—The Evolution of This Technology in a New Uncertain Scenario. Entropy. 2021; 23(2):145. https://doi.org/10.3390/e23020145

Chicago/Turabian Style

Sevillano, Cristián A., Alby A. Pesantes, Elizabeth Peña Carpio, Elia J. Martínez, and Xiomar Gómez. 2021. "Anaerobic Digestion for Producing Renewable Energy—The Evolution of This Technology in a New Uncertain Scenario" Entropy 23, no. 2: 145. https://doi.org/10.3390/e23020145

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