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Bioaugmentation of Methanosarcina thermophila grown on biochar particles during semi-continuous thermophilic food waste anaerobic digestion under two different bioaugmentation regimes

Authors
Lee, Jonathan T. E.Dutta, NalokZhang, LeTsui, Thomas T. H.Lim, ShuhanTio, Zhi KaiLim, Ee YangSun, JiachenZhang, JingxinWang, Chi-HwaOk, Yong SikAhring, Birgitte K.Tong, Yen Wah
Issue Date
9월-2022
Publisher
ELSEVIER SCI LTD
Keywords
Foodwaste; Biochar; Bioaugmentation; Thermophilicanaerobicdigestion; Growthsupportparticles
Citation
BIORESOURCE TECHNOLOGY, v.360
Indexed
SCIE
SCOPUS
Journal Title
BIORESOURCE TECHNOLOGY
Volume
360
URI
https://scholar.korea.ac.kr/handle/2021.sw.korea/145819
DOI
10.1016/j.biortech.2022.127590
ISSN
0960-8524
Abstract
This study presents the effect of bioaugmentation of thermophilic anaerobic digestion of food waste with Methanosarcina thermophila grown on a wood-derived biochar. Two different supplementation regimes were tested, namely a single bioaugmentation (SBABC) in which 10% v/v of the microbes grown on biochar (1 g/L) is added at setup of the reactors, versus a routine bioaugmentation (RBABC) wherein the same amount of sup-plements were added over 10 feeding cycles. The optimally performing 'R' and 'S' reactors had increased methane yields by 37% and 32% over their respective controls while reactors SBABC 2 and 3 produced 21.89%This study presents the effect of bioaugmentation of thermophilic anaerobic digestion of food waste with Methanosarcina thermophila grown on a wood-derived biochar. Two different supplementation regimes were tested, namely a single bioaugmentation (SBABC) in which 10% v/v of the microbes grown on biochar (1 g/L) is added at setup of the reactors, versus a routine bioaugmentation (RBABC) wherein the same amount of sup-plements were added over 10 feeding cycles. The optimally performing 'R' and 'S' reactors had increased methane yields by 37% and 32% over their respective controls while reactors SBABC 2 and 3 produced 21.89% and 56.09% higher average methane yield than RBABC 2 and 3, respectively. It appears that a single dose bioaugmentation is advantageous for improving AD as analysed in terms of average methane yield and VFA production. This study provides the basis for understanding how biochar and bioaugmentation can be used for engineering sustainable pilot-scale AD processes.
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College of Life Sciences and Biotechnology > Division of Environmental Science and Ecological Engineering > 1. Journal Articles

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