Overview
ABSTRACT
A major technical pillar for the development of the bio-economy, methane-producing technologies hold a special place in the concept of the environmental biorefinery. They allow the valorization of a large variety of agro-resources, particularly residues, by a sustainable transformation of these biomass sources into energy and various products usable in agriculture for soil amendment or fertilization. This article briefly explains the biological reactions occurring during anaerobic digestion, and overviews the available processes. It also provides a guide for follow-up and optimization of performance in anaerobic digesters, including the valorization of their products.
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Read the articleAUTHORS
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Renaud ESCUDIE : Research Director - Laboratoire de Biotechnologie de l'Environnement Institut National de la Recherche Agronomique, Narbonne, France
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Romain CRESSON : Director, INRA Transfert Environnement - Laboratoire de Biotechnologie de l'Environnement Institut National de la Recherche Agronomique, Narbonne, France
INTRODUCTION
Methanization is now considered the benchmark process for converting organic waste products into renewable energy or biofuel. Boosted by a favorable regulatory and economic context, linked in particular to the recognition by industrialized countries of the depletion of fossil fuels and the need to protect the environment, organic waste treatment processes incorporating methanization are experiencing significant growth. In addition to producing renewable energy, and depending on the nature of the product treated, methanization can also achieve two additional objectives: reducing the pollution load of organic waste or effluent, and producing a stabilized digestate that can be used as a fertilizer or organic amendment in agriculture. In this way, anaerobic digestion is an essential technological building block in the development of the bioeconomy, in close collaboration with local communities and their agrosystems.
In the French context of anaerobic digestion of organic waste products resulting from human activity, the aim of this article is firstly to set out the fundamentals of the anaerobic digestion process, so as to be able to propose guides for optimizing digesters. The valorization of the products of anaerobic digestion (biogas and digestate) is also discussed.
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KEYWORDS
biorefineries | anaerobic digestion | bioeconomy | agro-resources valorisation
Anaerobic Digestion of Biomass
Biological process of anaerobic digestion of organic matter
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