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Impacts of trace element supplementation on the performance of anaerobic digestion process: A critical review.

Authors :
Choong YY
Norli I
Abdullah AZ
Yhaya MF
Source :
Bioresource technology [Bioresour Technol] 2016 Jun; Vol. 209, pp. 369-79. Date of Electronic Publication: 2016 Mar 10.
Publication Year :
2016

Abstract

This paper critically reviews the impacts of supplementing trace elements on the anaerobic digestion performance. The in-depth knowledge of trace elements as micronutrients and metalloenzyme components justifies trace element supplementation into the anaerobic digestion system. Most of the earlier studies reported that trace elements addition at (sub)optimum dosages had positive impacts mainly longer term on digester stability with greater organic matter degradation, low volatile fatty acids (VFA) concentration and higher biogas production. However, these positive impacts and element requirements are not fully understood, they are explained on a case to case basis because of the great variance of the anaerobic digestion operation. Iron (Fe), nickel (Ni) and cobalt (Co) are the most studied and desirable elements. The right combination of multi-elements supplementation can have greater positive impact. This measure is highly recommended, especially for the mono-digestion of micronutrient-deficient substrates. The future research should consider the aspect of trace element bioavailability.<br /> (Copyright © 2016. Published by Elsevier Ltd.)

Details

Language :
English
ISSN :
1873-2976
Volume :
209
Database :
MEDLINE
Journal :
Bioresource technology
Publication Type :
Academic Journal
Accession number :
27005788
Full Text :
https://doi.org/10.1016/j.biortech.2016.03.028