Impact of Operational Factors, Inoculum Origin, and Feedstock Preservation on the Biochemical Methane Potential

Anaerobic digestion for the valorization of organic wastes into biogas is gaining worldwide interest. Nonetheless, the sizing of the biogas plant units require knowledge of the quantity of feedstock, and their associated methane potentials, estimated widely by Biochemical Methane Potential (BMP) tes...

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Autores principales:	Audrey Lallement, Aline Siaud, Christine Peyrelasse, Prasad Kaparaju, Blandine Schraauwers, Samuel Maunas, Florian Monlau
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	anaerobic digestion inoculum origin feedstock conservation kinetic rate Technology T Biology (General) QH301-705.5
Acceso en línea:	https://doaj.org/article/5d3357b02f8a487980facabde85ef496
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spelling	oai:doaj.org-article:5d3357b02f8a487980facabde85ef4962021-11-25T16:46:35ZImpact of Operational Factors, Inoculum Origin, and Feedstock Preservation on the Biochemical Methane Potential10.3390/bioengineering81101762306-5354https://doaj.org/article/5d3357b02f8a487980facabde85ef4962021-11-01T00:00:00Zhttps://www.mdpi.com/2306-5354/8/11/176https://doaj.org/toc/2306-5354Anaerobic digestion for the valorization of organic wastes into biogas is gaining worldwide interest. Nonetheless, the sizing of the biogas plant units require knowledge of the quantity of feedstock, and their associated methane potentials, estimated widely by Biochemical Methane Potential (BMP) tests. Discrepancies exist among laboratories due to variability of protocols adopted and operational factors used. The aim of this study is to verify the influence of some operational factors (e.g., analysis frequency, trace elements and vitamins solution addition and flushing gas), feedstock conservation and the source of inoculum on BMP. Among the operational parameters tested on cellulose degradation, only the type of gas used for flushing headspace of BMP assays had shown a significant influence on methane yields from cellulose. Methane yields of 344 ± 6 NL CH<sub>4</sub> kg<sup>−1</sup> VS and 321 ± 10 NL CH<sub>4</sub> kg<sup>−1</sup> VS obtained from assays flushed with pure N<sub>2</sub> and N<sub>2</sub>/CO<sub>2</sub> (60/40 <i>v</i>/<i>v</i>). The origin of inoculum (fed in co-digestion) only significantly affected the methane yields for straw, 253 ± 3 and 333 ± 3 NL CH<sub>4</sub> kg<sup>−1</sup> VS. Finally, freezing/thawing cycle effect depended of the substrate (tested on biowaste, manure, straw and WWTP sludge) with a possible effect of water content substrate.Audrey LallementAline SiaudChristine PeyrelassePrasad KaparajuBlandine SchraauwersSamuel MaunasFlorian MonlauMDPI AGarticleanaerobic digestioninoculum originfeedstock conservationkinetic rateTechnologyTBiology (General)QH301-705.5ENBioengineering, Vol 8, Iss 176, p 176 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	anaerobic digestion inoculum origin feedstock conservation kinetic rate Technology T Biology (General) QH301-705.5
spellingShingle	anaerobic digestion inoculum origin feedstock conservation kinetic rate Technology T Biology (General) QH301-705.5 Audrey Lallement Aline Siaud Christine Peyrelasse Prasad Kaparaju Blandine Schraauwers Samuel Maunas Florian Monlau Impact of Operational Factors, Inoculum Origin, and Feedstock Preservation on the Biochemical Methane Potential
description	Anaerobic digestion for the valorization of organic wastes into biogas is gaining worldwide interest. Nonetheless, the sizing of the biogas plant units require knowledge of the quantity of feedstock, and their associated methane potentials, estimated widely by Biochemical Methane Potential (BMP) tests. Discrepancies exist among laboratories due to variability of protocols adopted and operational factors used. The aim of this study is to verify the influence of some operational factors (e.g., analysis frequency, trace elements and vitamins solution addition and flushing gas), feedstock conservation and the source of inoculum on BMP. Among the operational parameters tested on cellulose degradation, only the type of gas used for flushing headspace of BMP assays had shown a significant influence on methane yields from cellulose. Methane yields of 344 ± 6 NL CH<sub>4</sub> kg<sup>−1</sup> VS and 321 ± 10 NL CH<sub>4</sub> kg<sup>−1</sup> VS obtained from assays flushed with pure N<sub>2</sub> and N<sub>2</sub>/CO<sub>2</sub> (60/40 <i>v</i>/<i>v</i>). The origin of inoculum (fed in co-digestion) only significantly affected the methane yields for straw, 253 ± 3 and 333 ± 3 NL CH<sub>4</sub> kg<sup>−1</sup> VS. Finally, freezing/thawing cycle effect depended of the substrate (tested on biowaste, manure, straw and WWTP sludge) with a possible effect of water content substrate.
format	article
author	Audrey Lallement Aline Siaud Christine Peyrelasse Prasad Kaparaju Blandine Schraauwers Samuel Maunas Florian Monlau
author_facet	Audrey Lallement Aline Siaud Christine Peyrelasse Prasad Kaparaju Blandine Schraauwers Samuel Maunas Florian Monlau
author_sort	Audrey Lallement
title	Impact of Operational Factors, Inoculum Origin, and Feedstock Preservation on the Biochemical Methane Potential
title_short	Impact of Operational Factors, Inoculum Origin, and Feedstock Preservation on the Biochemical Methane Potential
title_full	Impact of Operational Factors, Inoculum Origin, and Feedstock Preservation on the Biochemical Methane Potential
title_fullStr	Impact of Operational Factors, Inoculum Origin, and Feedstock Preservation on the Biochemical Methane Potential
title_full_unstemmed	Impact of Operational Factors, Inoculum Origin, and Feedstock Preservation on the Biochemical Methane Potential
title_sort	impact of operational factors, inoculum origin, and feedstock preservation on the biochemical methane potential
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/5d3357b02f8a487980facabde85ef496
work_keys_str_mv	AT audreylallement impactofoperationalfactorsinoculumoriginandfeedstockpreservationonthebiochemicalmethanepotential AT alinesiaud impactofoperationalfactorsinoculumoriginandfeedstockpreservationonthebiochemicalmethanepotential AT christinepeyrelasse impactofoperationalfactorsinoculumoriginandfeedstockpreservationonthebiochemicalmethanepotential AT prasadkaparaju impactofoperationalfactorsinoculumoriginandfeedstockpreservationonthebiochemicalmethanepotential AT blandineschraauwers impactofoperationalfactorsinoculumoriginandfeedstockpreservationonthebiochemicalmethanepotential AT samuelmaunas impactofoperationalfactorsinoculumoriginandfeedstockpreservationonthebiochemicalmethanepotential AT florianmonlau impactofoperationalfactorsinoculumoriginandfeedstockpreservationonthebiochemicalmethanepotential
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Impact of Operational Factors, Inoculum Origin, and Feedstock Preservation on the Biochemical Methane Potential

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