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Description: Microwave-assisted alkali pretreatment was investigated to enhance enzymatic saccharification of canola straw and oat hull for the production of bioethanol. Pretreatment is a necessary step for efficient and effective conversion of lignocellulosic biomass to biofuel. The study compared the effectiveness of microwave-assisted alkali pretreatment, microwave alone and alkali treatment for enzymatic digestibility on canola straw and oat hull. Microwave pretreatments were employed by immersing the biomass in dilute alkali solutions (NaOH and KOH) at various concentrations of 0, 0.75and 1.5% (w/v) for microwave-assisted times of 6, 12, and 18 min. Alkali treatments were carried out using the same procedure but by soaking and without microwave heating. The highest glucose yields after enzymatic saccharification for both canola straw and oat hull were obtained when these biomass were ground using 1.6 mm hammer mill screen size and subjected to microwave-assisted alkali pretreatment using 1.5% and 0.75% NaOH for 18 min respectively. SEM analysis indicated a more significant modification in the structure of biomass samples subjected to microwave-assisted alkali pretreatment compared to untreated and alkali treated biomass samples. Results indicated that microwave-assisted alkali pretreatment at short residence time enhanced glucose yield.

Keywords: Microwave, Lignocellulosic biomass, Agricultural residues, Pretreatment, Enzymatic saccharification
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Date: 2017-08-07
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Conference name: CSBE/SCGAB 2017 Annual Conference, Canad Inns Polo Park, Winnipeg, Manitoba, 6-10 August 2017.
Session name: Session 3A: Biodiesel, Biogas, and Pre-treatment

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Type: Text.Article
Format: PDF
Publication type: Technical conference
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Coverage: Canada
Language 1: en
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Rights: Canadian Society for Bioengineering
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