title: Effect of fungal and phosphoric acid pretreatment on ethanol production from oil palm empty fruit bunches (OPEFB).
abstract: Oil palm empty fruit bunches (OPEFB), a lignocellulosic residue of palm oil industries was examined for ethanol production. Milled OPEFB exposed to simultaneous saccharification and fermentation (SSF) with enzymes and Saccharomyces cerevisiae resulted just in 14.5% ethanol yield compared to the theoretical yield. Therefore, chemical pretreatment with phosphoric acid, a biological pretreatment with white-rot fungus Pleurotus floridanus, and their combination were carried out on OPEFB prior to the SSF. Pretreatment with phosphoric acid, combination of both methods and just fungal pretreatment improved the digestibility of OPEFB by 24.0, 16.5 and 4.5 times, respectively. During the SSF, phosphoric acid pretreatment, combination of fungal and phosphoric acid pretreatment and just fungal pretreatment resulted in the highest 89.4%, 62.8% and 27.9% of the theoretical ethanol yield, respectively. However, the recovery of the OPEFB after the fungal pretreatment was 98.7%, which was higher than after phosphoric acid pretreatment (36.5%) and combined pretreatment (45.2%).
authors.affiliation: Swedish Centre for Resource Recovery, University of Borås, Sweden; Department of Chemical and Polymer Engineering, Lagos State University, Nigeria. Electronic address: mofoluwake.ishola@hb.se.
authors.forename: Mofoluwake M
authors.initials: MM
authors.lastname: Ishola
authors.affiliation: Indonesian Biotechnology Research Institute of Estate Crops, Bogor, Indonesia.
authors.lastname: Isroi
authors.affiliation: Swedish Centre for Resource Recovery, University of Borås, Sweden.
authors.forename: Mohammad J
authors.initials: MJ
authors.lastname: Taherzadeh
mesh_terms: D028023:Arecaceae / Q000737:chemistry*; D018533:Biomass; D001709:Biotechnology / Q000379:methods*; D050260:Carbohydrate Metabolism / Q000187:drug effects; D000431:Ethanol / Q000378:metabolism*; D005285:Fermentation / Q000187:drug effects; D005638:Fruit / Q000737:chemistry*; D000073878:Palm Oil; D010756:Phosphoric Acids / Q000494:pharmacology*; D010938:Plant Oils / Q000737:chemistry*; D012441:Saccharomyces cerevisiae / Q000187:drug effects / Q000378:metabolism*
chemical_list: D010756:Phosphoric Acids; D010938:Plant Oils; D000431:Ethanol; D000073878:Palm Oil; C030242:phosphoric acid
keywords: Ethanol; Lignocellulose pretreatment; Oil palm empty fruit bunches; Phosphoric acid; White rot fungi