Microwave-assisted acid pretreatment of sago wastewater for fermentable sugar production

Mohamad Puad, Noor Illi and Mohd Rashidi, Ummul Madihah and Azmi, Azlin Suhaida and Abd Wahab, Mohd Firdaus (2020) Microwave-assisted acid pretreatment of sago wastewater for fermentable sugar production. IOP Conference Series: Materials Science and Engineering, 778 (012051). pp. 1-8. ISSN 1757-8981 E-ISSN 1757-899X

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Abstract

Sago wastewater (SWW) is one of by-products from sago starch industry. In most practice, SWW is discharged to the nearby rivers. As it contains high amount of organic compounds, usual practice of disposing the wastewater will cause a detrimental impact to the environment. The organic compounds found in SWW such as starch can be utilized as substrate for biofuel and biohydrogen fermentations. However, this starch needs to first undergo pretreatment process to breakdown its complex sugars to the simpler ones. This study aimed to investigate the effect of microwave-assisted acid pretreatment of SWW for fermentable sugar (glucose) production using sulphuric acid (H2SO4). Three parameters that influenced microwave-assisted acid pretreatment were chosen for optimization which are residence time (3-9 min), acid concentration (0.2-0.6 M) and solid loading (5-15% w/v). Faced Centered Central Composite Design (FCCCD) tool under Response Surface Methodology (RSM) in Design Expert v9.0.6.2 software was used for designing the experiments and optimization purposes. The response was the amount of glucose converted (g/L). The maximum fermentable sugar produced was 3.920 g/L, obtained at 9 minutes with 15% solid loading using 0.6 M of H2SO4. Then, the kinetic study of acid hydrolysis was performed by following the first order reaction kinetics. The rate constant of reaction obtained was 0.1684 min−1. It can be concluded that microwave-assisted acid pretreatment of SWW is able to produce high amount of fermentable sugar within a short residence time.

Item Type:	Article (Journal)
Additional Information:	5462/80311
Uncontrolled Keywords:	Microwave-assisted acid pretreatment, sago wastewater, fermentable sugar production
Subjects:	T Technology > T Technology (General) T Technology > TP Chemical technology > TP155 Chemical engineering
Kulliyyahs/Centres/Divisions/Institutes (Can select more than one option. Press CONTROL button):	Kulliyyah of Engineering Kulliyyah of Engineering > Department of Biotechnology Engineering
Depositing User:	Noor Illi Mohamad Puad
Date Deposited:	13 May 2020 09:32
Last Modified:	18 Jan 2021 13:01
URI:	http://irep.iium.edu.my/id/eprint/80311

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