Impact of electro-conductive nanoparticles additives on anaerobic digestion performance - A review

Amro Hassanein; A Naresh Kumar; Stephanie Lansing

doi:10.1016/j.biortech.2021.126023

Impact of electro-conductive nanoparticles additives on anaerobic digestion performance - A review

Bioresour Technol. 2021 Dec:342:126023. doi: 10.1016/j.biortech.2021.126023. Epub 2021 Sep 24.

Authors

Amro Hassanein¹, A Naresh Kumar², Stephanie Lansing²

Affiliations

¹ Department of Environmental Science and Technology, University of Maryland, College Park, MD 20742, USA. Electronic address: ahassane@umd.edu.
² Department of Environmental Science and Technology, University of Maryland, College Park, MD 20742, USA.

PMID: 34852449
DOI: 10.1016/j.biortech.2021.126023

Abstract

Anaerobic digestion (AD) is a biochemical process that converts waste organic matter into energy-rich biogas with methane as the main component. Addition of electric electro-conductive, such as that nanoparticles (NP), has been shown to improve biogas generation. Interspecies electron transfer and direct interspecies electron transfer (DIET) using conductive materials is one of the mechanisms responsible for observed increases in CH₄. This article discusses the effect of the type and size of electro-conductive NPs on improving microbial degradation within AD systems, as well as the effect of electro-conductive NPs on microbial community shifts and syntrophic metabolism. Limitations and future perspectives of using NPs in an AD system is also discussed.

Keywords: Biogas; Digester; Direct interspecies electron transfer; Methane; Trace metals.

Publication types

Review

MeSH terms

Anaerobiosis
Bioreactors*
Electron Transport
Methane
Nanoparticles*

Substances

Methane