2019 ; Vol.29-11: 1760~1768
|Author||Sanath Kondaveeti, Raviteja Pagolu, Sanjay K. S. Patel, Ashok Kumar, Aarti Bisht, Devashish Das, Vipin Chandra Kalia, In-Won Kim, Jung-Kul Lee|
|Place of duty||Department of Chemical Engineering, Konkuk University, Seoul 05029, Republic of Korea|
|Title||Bioelectrochemical Detoxification of Phenolic Compounds during Enzymatic Pre-Treatment of Rice Straw|
J. Microbiol. Biotechnol.2019 ;
|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.|
|Key_word||Voltage supplementation, bioelectrochemical detoxification, phenolic compounds, rice straw, hydrolysis|
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