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Magnetite-based nanoparticles and nanocomposites for recovery of overloaded anaerobic digesters. | LitMetric

Magnetite-based nanoparticles and nanocomposites for recovery of overloaded anaerobic digesters.

Bioresour Technol

School of Energy, Geoscience, Infrastructure and Society, Heriot-Watt University, Edinburgh EH14 4AS, Scotland, UK; Solidsense Ltd, Bearsden, East Dunbartonshire G61 3BA, Scotland, UK.

Published: March 2023

AI Article Synopsis

Article Abstract

The effect of magnetite nanoparticles and nanocomposites (magnetite nanoparticles impregnated into graphene oxide) supplement on the recovery of overloaded laboratory batch anaerobic reactors was assessed using two types of starting inoculum: anaerobic granular sludge (GS) and flocculent sludge (FS). Both nanomaterials recovered methane production at a dose of 0.27 g/L within 40 days in GS. Four doses of magnetite nanoparticles from 0.075 to 1 g/L recovered the process in FS systems between 30 and 50 days relaying on the dose. The presence of nanomaterials helped to reverse the effect of volatile fatty acids inhibition and enabled microbial communities to recover but also favoured the development of certain microorganisms over others. In GS reactors, the methanogenic population changed from being mostly acetoclastic (Methanothrix soehngenii) to being dominated by hydrogenotrophic species (Methanobacterium beijingense). Nanomaterial amendment may serve as a preventative measure or provide an effective remedial solution for system recovery following overloading.

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Source
http://dx.doi.org/10.1016/j.biortech.2023.128632DOI Listing

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