Reutilization of green liquor chemicals for pretreatment of whole rice waste biomass and its application to 2,3-butanediol production

Ganesh D. Saratale; Moo Young Jung; Min Kyu Oh

doi:10.1016/j.biortech.2016.01.028

Reutilization of green liquor chemicals for pretreatment of whole rice waste biomass and its application to 2,3-butanediol production

Ganesh D. Saratale, Moo Young Jung, Min Kyu Oh

Department of Chemical and Biological Engineering

Research output: Contribution to journal › Article › peer-review

41 Citations (Scopus)

Abstract

The performance of green liquor pretreatment using Na₂CO₃ and Na₂SO₃ and its optimization for whole rice waste biomass (RWB) was investigated. Incubation of Na₂CO₃-Na₂SO₃ at a 1:1 ratio (chemical charge 10%) for 12% RWB at 100°C for 6h resulted in maximum delignification (58.2%) with significant glucan yield (88%) and total sugar recovery (545mg/g of RWB) after enzymatic hydrolysis. Recovery and reusability of the resulting chemical spent wash were evaluated to treat RWB along with its compatibility for enzymatic digestibility. Significant hydrolysis and lignin removal were observed for up to three cycles; however, further reuse of Na₂CO₃ and Na₂SO₃ lowered their performance. Significant 2,3-butanediol (BDO) was produced by Klebsiella pneumoniae KMK-05 with the RWB enzymatic hydrolysate from each pretreatment cycle. BDO yield achieved using RWB-derived sugars was similar to those using laboratory-grade sugars. This pretreatment strategy constitutes an ecofriendly, cost-effective, and practical method for utilizing lignocellulosic biomass.

Original language	English
Pages (from-to)	90-96
Number of pages	7
Journal	Bioresource technology
Volume	205
DOIs	https://doi.org/10.1016/j.biortech.2016.01.028
Publication status	Published - 2016 Apr 1

Keywords

2,3-Butanediol
NaCO-NaSO pretreatment
Reusability of chemicals
Rice waste biomass

ASJC Scopus subject areas

Bioengineering
Environmental Engineering
Renewable Energy, Sustainability and the Environment
Waste Management and Disposal

UN SDGs

This output contributes to the following Sustainable Development Goal(s)

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title = "Reutilization of green liquor chemicals for pretreatment of whole rice waste biomass and its application to 2,3-butanediol production",

abstract = "The performance of green liquor pretreatment using Na2CO3 and Na2SO3 and its optimization for whole rice waste biomass (RWB) was investigated. Incubation of Na2CO3-Na2SO3 at a 1:1 ratio (chemical charge 10%) for 12% RWB at 100°C for 6h resulted in maximum delignification (58.2%) with significant glucan yield (88%) and total sugar recovery (545mg/g of RWB) after enzymatic hydrolysis. Recovery and reusability of the resulting chemical spent wash were evaluated to treat RWB along with its compatibility for enzymatic digestibility. Significant hydrolysis and lignin removal were observed for up to three cycles; however, further reuse of Na2CO3 and Na2SO3 lowered their performance. Significant 2,3-butanediol (BDO) was produced by Klebsiella pneumoniae KMK-05 with the RWB enzymatic hydrolysate from each pretreatment cycle. BDO yield achieved using RWB-derived sugars was similar to those using laboratory-grade sugars. This pretreatment strategy constitutes an ecofriendly, cost-effective, and practical method for utilizing lignocellulosic biomass.",

keywords = "2,3-Butanediol, NaCO-NaSO pretreatment, Reusability of chemicals, Rice waste biomass",

author = "Saratale, {Ganesh D.} and Jung, {Moo Young} and Oh, {Min Kyu}",

note = "Funding Information: This study was supported by a grant from the New & Renewable Energy Program of the Korea Institute of Energy Technology Evaluation and Planning (No. 20143030091040 ), South Korea. It was also supported through the National Research Foundation of Korea (NRF) funded by the Ministry of Science, ICT & Future Planning ( 2015M3D3A1A01064919 ). The authors acknowledge the technical help from Mr. Ji-Woong Jang from Korea University. ",

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AU - Saratale, Ganesh D.

AU - Jung, Moo Young

AU - Oh, Min Kyu

N1 - Funding Information: This study was supported by a grant from the New & Renewable Energy Program of the Korea Institute of Energy Technology Evaluation and Planning (No. 20143030091040 ), South Korea. It was also supported through the National Research Foundation of Korea (NRF) funded by the Ministry of Science, ICT & Future Planning ( 2015M3D3A1A01064919 ). The authors acknowledge the technical help from Mr. Ji-Woong Jang from Korea University.

PY - 2016/4/1

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N2 - The performance of green liquor pretreatment using Na2CO3 and Na2SO3 and its optimization for whole rice waste biomass (RWB) was investigated. Incubation of Na2CO3-Na2SO3 at a 1:1 ratio (chemical charge 10%) for 12% RWB at 100°C for 6h resulted in maximum delignification (58.2%) with significant glucan yield (88%) and total sugar recovery (545mg/g of RWB) after enzymatic hydrolysis. Recovery and reusability of the resulting chemical spent wash were evaluated to treat RWB along with its compatibility for enzymatic digestibility. Significant hydrolysis and lignin removal were observed for up to three cycles; however, further reuse of Na2CO3 and Na2SO3 lowered their performance. Significant 2,3-butanediol (BDO) was produced by Klebsiella pneumoniae KMK-05 with the RWB enzymatic hydrolysate from each pretreatment cycle. BDO yield achieved using RWB-derived sugars was similar to those using laboratory-grade sugars. This pretreatment strategy constitutes an ecofriendly, cost-effective, and practical method for utilizing lignocellulosic biomass.

AB - The performance of green liquor pretreatment using Na2CO3 and Na2SO3 and its optimization for whole rice waste biomass (RWB) was investigated. Incubation of Na2CO3-Na2SO3 at a 1:1 ratio (chemical charge 10%) for 12% RWB at 100°C for 6h resulted in maximum delignification (58.2%) with significant glucan yield (88%) and total sugar recovery (545mg/g of RWB) after enzymatic hydrolysis. Recovery and reusability of the resulting chemical spent wash were evaluated to treat RWB along with its compatibility for enzymatic digestibility. Significant hydrolysis and lignin removal were observed for up to three cycles; however, further reuse of Na2CO3 and Na2SO3 lowered their performance. Significant 2,3-butanediol (BDO) was produced by Klebsiella pneumoniae KMK-05 with the RWB enzymatic hydrolysate from each pretreatment cycle. BDO yield achieved using RWB-derived sugars was similar to those using laboratory-grade sugars. This pretreatment strategy constitutes an ecofriendly, cost-effective, and practical method for utilizing lignocellulosic biomass.

KW - 2,3-Butanediol

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KW - Reusability of chemicals

KW - Rice waste biomass

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Reutilization of green liquor chemicals for pretreatment of whole rice waste biomass and its application to 2,3-butanediol production

Abstract

Keywords

ASJC Scopus subject areas

UN SDGs

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