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Title: Process disturbances in agricultural biogas production—causes, mechanisms and effects on the biogas microbiome: A review
Authors: Theuerl, S.Klang, J.Prochnow, A.
Publishers Version:
Issue Date: 2019
Published in: Energies Vol. 12 (2019), No. 3
Publisher: Basel : MDPI AG
Abstract: Disturbances of the anaerobic digestion process reduce the economic and environmental performance of biogas systems. A better understanding of the highly complex process is of crucial importance in order to avoid disturbances. This review defines process disturbances as significant changes in the functionality within the microbial community leading to unacceptable and severe decreases in biogas production and requiring an active counteraction to be overcome. The main types of process disturbances in agricultural biogas production are classified as unfavorable process temperatures, fluctuations in the availability of macro- and micronutrients (feedstock variability), overload of the microbial degradation potential, process-related accumulation of inhibiting metabolites such as hydrogen (H 2 ), ammonium/ammonia (NH 4 + /NH 3 ) or hydrogen sulphide (H 2 S) and inhibition by other organic and inorganic toxicants. Causes, mechanisms and effects on the biogas microbiome are discussed. The need for a knowledge-based microbiome management to ensure a stable and efficient production of biogas with low susceptibility to disturbances is derived and an outlook on potential future process monitoring and control by means of microbial indicators is provided.
Keywords: Agriculture; Anaerobic digestion; Biodegradation; Biodiversity; Biogas; Environmental management; Knowledge based systems; Process monitoring; Sulfur compounds; Anaerobic digestion process; Economic and environmental performance; Macro-and micronutrients; Microbial biodiversity; Microbial communities; Microbial degradation; Microbial indicators; Process monitoring and control; Process control; Anaerobic digestion; Biogas; Microbial biodiversity; Process control
DDC: 570
License: CC BY 4.0 Unported
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Appears in Collections:Biowissenschaften

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