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http://dx.doi.org/10.4014/jmb.1909.09042

Bioelectrochemical Detoxification of Phenolic Compounds during Enzymatic Pre-Treatment of Rice Straw  

Kondaveeti, Sanath (Department of Chemical Engineering, Konkuk University)
Pagolu, Raviteja (Department of Chemical Engineering, Konkuk University)
Patel, Sanjay K.S. (Department of Chemical Engineering, Konkuk University)
Kumar, Ashok (Department of Chemical Engineering, Konkuk University)
Bisht, Aarti (Department of Chemical Engineering, Konkuk University)
Das, Devashish (Department of Chemical Engineering, Konkuk University)
Kalia, Vipin Chandra (Department of Chemical Engineering, Konkuk University)
Kim, In-Won (Department of Chemical Engineering, Konkuk University)
Lee, Jung-Kul (Department of Chemical Engineering, Konkuk University)
Publication Information
Journal of Microbiology and Biotechnology / v.29, no.11, 2019 , pp. 1760-1768 More about this Journal
Abstract
The use of lignocellulosic biomass such as rice straw can help subsidize the cost of producing value-added chemicals. However, inhibitory compounds, such as phenolics, produced during the pre-treatment of biomass, hamper the saccharification process. Laccase and electrochemical stimuli are both well known to reduce phenolic compounds. Therefore, in this study, we implemented a bioelectrochemical detoxification system (BEDS), a consolidated electrochemical and enzymatic process involving laccase, to enhance the detoxification of phenolics, and thus achieve a higher saccharification efficiency. Saccharification of pretreated rice straw using BEDS at 1.5 V showed 90% phenolic reduction (Phr), thereby resulting in a maximum saccharification yield of 85%. In addition, the specific power consumption when using BEDS (2.2 W/Kg Phr) was noted to be 24% lower than by the electrochemical process alone (2.89 W/kg Phr). To the best of our knowledge, this is the first study to implement BEDS for reduction of phenolic compounds in pretreated biomass.
Keywords
Voltage supplementation; bioelectrochemical detoxification; phenolic compounds; rice straw; hydrolysis;
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Times Cited By KSCI : 12  (Citation Analysis)
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