Evaluation of rice straw biopowder from alkaline-mechanical pretreatment by hydro-textural approach

Santi Chuetor; Thierry Ruiz; Abdellatif Barakat; Navadol Laosiripojana; Verawat Champreda; Malinee Sriariyanun

doi:10.1016/j.biortech.2020.124619

Evaluation of rice straw biopowder from alkaline-mechanical pretreatment by hydro-textural approach

Bioresour Technol. 2021 Mar:323:124619. doi: 10.1016/j.biortech.2020.124619. Epub 2020 Dec 29.

Authors

Santi Chuetor¹, Thierry Ruiz², Abdellatif Barakat³, Navadol Laosiripojana⁴, Verawat Champreda⁵, Malinee Sriariyanun⁶

Affiliations

¹ Department of Chemical Engineering, Faculty of Engineering, King Mongkut's University of Technology North Bangkok, Bangkok, Thailand. Electronic address: santi.c@eng.kmutnb.ac.th.
² QualiSud, University Montpellier, CIRAD, Montpellier Supagro, Montpellier, France.
³ UMR IATE 1208 CIRAD/INRA/Montpellier SupAgro/Université Montpellier, 2 Place Pierre Viala, 34060 Montpellier Cedex 5, France.
⁴ BIOTEC-JGSEE Integrative Biorefinery Laboratory, Innovation Cluster 2 Building, Thailand Science Park, Phaholyothin Road, Khlong Luang, Pathumthani, Thailand; Joint Graduate School for Energy and Environment, King Mongkut's University of Technology Thonburi, Bangmod, Bangkok, Thailand.
⁵ BIOTEC-JGSEE Integrative Biorefinery Laboratory, Innovation Cluster 2 Building, Thailand Science Park, Phaholyothin Road, Khlong Luang, Pathumthani, Thailand; Biorefinery and Bioproducts Research Group, National Center for Genetic Engineering and Biotechnology, Thailand Science Park, Pathumthani, Thailand.
⁶ Department of Chemical and Process Engineering, The Sirindhorn International Thai German Graduate School of Engineering, King Mongkut's University of Technology North Bangkok, Bangkok, Thailand.

PMID: 33406466
DOI: 10.1016/j.biortech.2020.124619

Abstract

Apretreatment step forlignocelluloses is responsible to alter the complex structure which allows enhancingenzymatic accessibility and bioconversion of the materials.However, there is a gap on the methods to characterize physicalevolutions of the material throughout its pretreatment.The aim of this study is to evaluate the physical changes in rice straw (RS)pretreated with alkaline followed by grinding to produce biopowders.A hydro-textural approach was applied to evaluate the physical changes of RS pretreated byimpregnation and soaking in NaOH.The results indicated that the volume deformation increased by 110%, whilethe energy consumptiondecreased by 11.3% compared to unpretreated RS.Moreover, the cellulose content and glucose were 66.8 and 212 mg/gRS obtained by RSsoaking. Thealkaline-mechanicalpretreatment was shown asan effective process to providehigh glucosereadily converted to bioethanol.Additionally, the hydro-textural approach can be considered an alternative method for biomass structural characterization.

Keywords: Alkaline-mechanical pretreatment; Biopowders; Hydro-textural approach; Rice straw; Volume deformation.

MeSH terms

Biomass
Cellulose
Hydrolysis
Lignin
Oryza*

Substances

Cellulose
Lignin