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

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

65 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

Bibliographical note

Publisher Copyright:
© 2016 Elsevier Ltd.

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 UN Sustainable Development Goals (SDGs)

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10.1016/j.biortech.2016.01.028

Cite this

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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.",

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AU - Oh, Min Kyu

PY - 2016/4/1

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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.

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ER -

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

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

UN SDGs

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