Comparative Study of Various Pretreatment Reagents on Rice Husk and Structural Changes Assessment of the Optimised Pretreated Rice Husk

Bioresource Technology, 135: 116-119

21 Pages Posted: 19 Jan 2015

See all articles by Teck Nam

Teck Nam

The University of Auckland

Gek-Cheng Ngoh

University of Malaya (UM) - Department of Chemistry

Adeline Seak May Chua

University of Malaya (UM)

Date Written: 2013

Abstract

The performance of alkalis (NaOH and Ca(OH)2) and acids (H2SO4, HCl, H3PO4, CH3COOH, and HNO3) in the pretreatment of rice husk was screened, and a suitable reagent was assessed for subsequent optimisation using response surface methodology. From the assessment, HCl that hydrolysed rice husk well was optimised with three parameters (HCl loading, pretreatment duration, and temperature) using Box-Behnken Design. The optimised condition (0.5% (w/v) HCl loading, 125oC, 1.5 hours) is relatively mild, and resulted in ~22.3 mg TRS/ml hydrolysate. The reduced model developed has good predictability, where the predicted and experimental results differ by only 2%. The comprehensive structural characterization studies that involved FT-IR, XRD, SEM, and BET surface area determination showed that the pretreated rice husk consisted mainly of cellulose and lignin. Compared to untreated rice husk, pretreated rice husk possessed increased pore size and pore volume, which are expected to be beneficial for fungal growth during fermentation.

Keywords: Response surface methodology; optimization; rice hulls; pretreatment; structural assessment.

JEL Classification: C09, C93, N55, O13, Q00, Q10, Q16, Q20, Q23, Q40, Q42

Suggested Citation

Ang, Teck Nam and Ngoh, Gek-Cheng and Chua, Adeline Seak May, Comparative Study of Various Pretreatment Reagents on Rice Husk and Structural Changes Assessment of the Optimised Pretreated Rice Husk (2013). Bioresource Technology, 135: 116-119. Available at SSRN: https://ssrn.com/abstract=2550034

Teck Nam Ang (Contact Author)

The University of Auckland ( email )

Department of Chemical and Materials Engineering
Auckland, AK 1010
New Zealand

Gek-Cheng Ngoh

University of Malaya (UM) - Department of Chemistry

Jalan Lembah Pantai
Kuala Lumpur, Wilayah Persekutuan 50603
Malaysia

Adeline Seak May Chua

University of Malaya (UM) ( email )

Kuala Lumpur, Wilayah Persekutuan 50603
University of Malaya (UM)
Kuala Lumpur, Wilayah Persekutuan 50603
Malaysia

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