Impact of Storage Conditions on the Methanogenic Activity of Anaerobic Digestion Inocula

Astals, Sergi and Koch, Konrad and Weinrich, Soren and Hafner, Sasha. D. and Tait, Stephan ORCID: https://orcid.org/0000-0002-0816-8911 and Peces, Miriam (2020) Impact of Storage Conditions on the Methanogenic Activity of Anaerobic Digestion Inocula. Water, 12 (5):1321. pp. 1-12.

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Abstract

The impact of storage temperature (4, 22 and 37 °C) and storage time (7, 14 and 21 days) on anaerobic digestion inocula was investigated through specific methanogenic activity assays. Experimental results showed that methanogenic activity decreased over time with storage, regardless of storage temperature. However, the rate at which the methanogenic activity decreased was two and five times slower at 4 °C than at 22 and 37 °C, respectively. The inoculum stored at 4 °C and room temperature (22 °C) maintained methanogenic activity close to that of fresh inoculum for 14 days (<10% difference). However, a storage temperature of 4 °C is preferred because of the slower decrease in activity with lengthier storage time. From this research, it was concluded that inoculum storage time should generally be kept to a minimum, but that storage at 4 °C could help maintain methanogenic activity for longer.


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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Faculty/School / Institute/Centre: No Faculty
Faculty/School / Institute/Centre: No Faculty
Date Deposited: 17 Feb 2022 02:13
Last Modified: 04 Mar 2022 04:37
Uncontrolled Keywords: Anaerobic digestion; Biochemical methane potential (BMP) test; Biogas; Inoculum; Methanogenesis; Sample storage; Specific methanogenic activity (SMA)
Fields of Research (2008): 09 Engineering > 0904 Chemical Engineering > 090409 Wastewater Treatment Processes
09 Engineering > 0907 Environmental Engineering > 090703 Environmental Technologies
Fields of Research (2020): 40 ENGINEERING > 4004 Chemical engineering > 400410 Wastewater treatment processes
40 ENGINEERING > 4011 Environmental engineering > 401106 Waste management, reduction, reuse and recycling
Socio-Economic Objectives (2020): 18 ENVIRONMENTAL MANAGEMENT > 1899 Other environmental management > 189999 Other environmental management not elsewhere classified
Identification Number or DOI: https://doi.org/10.3390/w12051321
URI: http://eprints.usq.edu.au/id/eprint/46143

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