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Kinetics for enzymatic hydrolysis of rice hulls by the ultrasonic pretreatment with a bio-based basic ionic liquid

Paper ID Volume ID Publish Year Pages File Format Full-Text
2891 141 2015 7 PDF Available
Title
Kinetics for enzymatic hydrolysis of rice hulls by the ultrasonic pretreatment with a bio-based basic ionic liquid
Abstract

•The effective physicochemical pretreatment uses choline hydroxide and ultrasound.•The network structure of rice hull is destroyed by the physicochemical pretreatment.•Ultrasound can promote effectively the mass-transfer of the enzyme into rice hulls.•Good TRS yield can be obtained at a much shorter hydrolysis time with ultrasound.•A simplified kinetic model for enzymatic hydrolysis of rice hulls was developed.

The enzymatic hydrolysis of rice hulls by the ultrasonic pretreatment using a bio-based basic ionic liquid was investigated. The morphological and characteristic structures of rice hulls before and after the pretreatment were analyzed by field emission scanning electron microscope (FE-SEM), X-ray energy dispersive spectrometer (EDS), focal plane array-Fourier transform infrared spectroscopy (FPA-FTIR), high resolution X-ray diffractometer (HR-XRD), and elemental analyzer (EA). The network structure of rice hulls after the physicochemical pretreatment was seriously corroded and punched to expose the accessible organic region by removing silica, lignin and ash to enhance the hydrolysis reaction. In ultrasound-assisted enzymatic hydrolysis by cellulase, the total reducing sugar yield from rice hulls after the pretreatment was 43.5% at only 3 h of hydrolysis time, and was greater than that from untreated rice hulls (24.0%). A simplified kinetic model was proposed to describe the enzymatic hydrolysis of rice hulls in a heterogeneous system using an impeded reaction of enzyme, with a time-dependent decay coefficient, the initial observed rate constants, and ineffective coefficients were obtained to successfully describe the enzymatic hydrolysis of rice hulls.

Keywords
Rice hull; Bio ionic liquid; Bioconversion; Enzymes; Production kinetics; Heterogeneous biocatalysis
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Kinetics for enzymatic hydrolysis of rice hulls by the ultrasonic pretreatment with a bio-based basic ionic liquid
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Publisher
Database: Elsevier - ScienceDirect
Journal: Biochemical Engineering Journal - Volume 100, 15 August 2015, Pages 23–29
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us