Resource recovery from the anaerobic digestion of food waste is underpinned by cross-kingdom microbial activities

C. Nzeteu, A. Joyce, C. Thorn, K. McDonnell, S. Shirran, V. O'Flaherty, F. Abram*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

15 Citations (Scopus)
6 Downloads (Pure)

Abstract

As the human population grows on the planet so does the generation of waste and particularly that of food waste. In order to tackle the world sustainability crisis, efforts to recover products from waste are critical. Here, we anaerobically recovered volatile fatty acids (VFAs) from food waste and analysed the microbial populations underpinning the process. An increased contribution of fungi relative to bacteria was observed throughout the reactor operation, with both kingdoms implicated into the main three steps of anaerobic digestion occurring within our systems: hydrolysis, acidogenesis and acetogenesis. Overall, Ascomycota, Proteobacteria and Firmicutes were found to drive the anaerobic digestion of food waste, with butyrate as the most abundant VFA likely produced by Clostridium using lactate as a precursor. Taken together we demonstrate that the generation of products of added-value from food waste results from cross-kingdoms microbial activities implicating fungi and bacteria.
Original languageEnglish
Article number100847
Number of pages9
JournalBioresource Technology Reports
Volume16
Early online date5 Oct 2021
DOIs
Publication statusPublished - Dec 2021

Keywords

  • 16S rRNA profiling
  • Anaerobic digestion
  • Metaproteomics
  • Resource recovery from waste

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