Ethanol production from alkali-pretreated oil palm empty fruit bunch by simultaneous saccharification and fermentation with mucor indicus. Issue 6 (2nd May 2016)

• Record Type: Journal Article
• Authors: Christia, Abdi; Setiowati, Arima Diah; Millati, Ria; Karimi, Keikhosro; Cahyanto, Muhammad Nur; Niklasson, Claes; Taherzadeh, Mohammad J.
• Is Part Of: International journal of green energy. Volume 13:Issue 6(2016)
• Page Start: 566
• Page End: 572
• Publication Date: 2016-05-02
• Subjects: Ethanol -- Mucor indicus -- oil palm empty fruit bunch (OPEFB) -- pretreatment -- sodium hydroxide -- simultaneous saccharification and fermentation; Power resources -- Research -- Periodicals; Energy industries -- Periodicals; Energy development -- Periodicals; 333.79
• DOI: 10.1080/15435075.2014.978004
• Languages: English
• ISSNs: 1543-5075

Abstract

ABSTRACT: Oil palm empty fruit bunch (OPEFB) is a potential raw material for production of lignocellulosic bioethanol. The OPEFB was pretreated with 8% sodium hydroxide (NaOH) solution at 100°C for 10 to 90 min. Enzymatic digestion was carried out using cellulase and β-glucosidase at 45°C for 24 h. It was then inoculated with Mucor indicus spores suspension and fermented under anaerobic conditions at 37°C for 96 h. Sodium hydroxide pretreatment effectively removed 51–57% of lignin in the OPEFB and also its hemicellulose (40–84%). The highest glucan digestibility (0.75 g/g theoretical glucose) was achieved in 40-min NaOH pretreatment. Fermentation by M. indicus resulted in 68.4% of the theoretical ethanol yield, while glycerol (16.2–83.2 mg/g), succinic acid (0–0.4 mg/g), and acetic acid (0–0.9 mg/g) were its by-products. According to these results, 11.75 million tons of dry OPEFB in Indonesia can be converted into 1.5 billion liters of ethanol per year.