Impact of Storage Conditions on the Methanogenic Activity of Anaerobic Digestion Inocula
Article
Article Title | Impact of Storage Conditions on the Methanogenic Activity of Anaerobic Digestion Inocula |
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ERA Journal ID | 123718 |
Article Category | Article |
Authors | Astals, Sergi (Author), Koch, Konrad (Author), Weinrich, Soren (Author), Hafner, Sasha. D. (Author), Tait, Stephan (Author) and Peces, Miriam (Author) |
Journal Title | Water: an open access journal |
Journal Citation | 12 (5), pp. 1-12 |
Article Number | 1321 |
Number of Pages | 12 |
Year | 2020 |
Publisher | MDPI AG |
Place of Publication | Switzerland |
ISSN | 2073-4441 |
Digital Object Identifier (DOI) | https://doi.org/10.3390/w12051321 |
Web Address (URL) | https://www.mdpi.com/2073-4441/12/5/1321 |
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. |
Keywords | Anaerobic digestion; Biochemical methane potential (BMP) test; Biogas; Inoculum; Methanogenesis; Sample storage; Specific methanogenic activity (SMA) |
ANZSRC Field of Research 2020 | 400410. Wastewater treatment processes |
401106. Waste management, reduction, reuse and recycling | |
Byline Affiliations | University of Barcelona, Spain |
Technical University of Munich, Germany | |
DBFZ German Biomass Research Centre, Germany | |
Hafner Consulting, United States | |
University of Queensland | |
Institution of Origin | University of Southern Queensland |
https://research.usq.edu.au/item/q6z17/impact-of-storage-conditions-on-the-methanogenic-activity-of-anaerobic-digestion-inocula
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