Abstract

This study used semi-continuous laboratory scale biogas reactors to simulate the effects of trace-element addition in different combinations, while degrading the organic fraction of municipal solid waste and slaughterhouse waste. The results show that the combined addition of Fe, Co and Ni was superior to the addition of only Fe, Fe and Co or Fe and Ni. However, the addition of only Fe resulted in a more stable process than the combined addition of Fe and Co, perhaps indicating a too efficient acidogenesis and/or homoacetogenesis in relation to a Ni-deprived methanogenic population. The results were observed in terms of higher biogas production (+9%), biogas production rates (+35%) and reduced VFA concentration for combined addition compared to only Fe and Ni. The higher stability was supported by observations of differences in viscosity, intraday WA-and biogas kinetics as well as by the 16S rRNA gene and 16S rRNA of the methanogens.(c) 2015 Elsevier Ltd. All rights reserved.

Keywords

Trace elements; Anaerobic digestion; OFMSW; Methanogenic population; Viscosity

Published in

Waste Management
2016, Volume: 47, number: Part A, pages: 11-20
Publisher: PERGAMON-ELSEVIER SCIENCE LTD

SLU Authors

• Moestedt, Jan

  • Department of Molecular Sciences, Swedish University of Agricultural Sciences
    
  • Linköping University
  • Tekniska verken i Linköping AB

UKÄ Subject classification

Environmental Sciences


Publication identifier

DOI: https://doi.org/10.1016/j.wasman.2015.03.007

Permanent link to this page (URI)

https://res.slu.se/id/publ/83121