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Bioconversion of lignocellulosic palm byproducts into enzymes and lipid by newly isolated oleaginous fungi

Paper ID Volume ID Publish Year Pages File Format Full-Text
3158 153 2014 6 PDF Available
Title
Bioconversion of lignocellulosic palm byproducts into enzymes and lipid by newly isolated oleaginous fungi
Abstract

•Cellulolytic oleaginous fungi could directly convert lignocellulosic biomass into lipid.•The fungal lipid has potential to be used as biodiesel feedstock.•Alkaline pretreatment of the substrate enhanced enzymes production by the fungi.•Response surface methodology successfully optimized the conditions for solid state fermentation.

Direct conversion of palm pressed fiber (PPF) and palm empty fruit bunches (EFB) into enzymes and lipid by oleaginous fungi were performed through solid-state fermentation (SSF). Among the strains tested, TSIP9 converted PPF and EFB into lipid with the highest yield of 31.1 ± 1.7 mg/gram dry substrate (gds) and 37.5 ± 2.2 mg/gds, respectively. It also produced high activity of cellulolytic enzymes. It was identified as Aspergillus tubingensis. The similar fatty acids of its lipid to those of plant oil indicate its suitable use as biodiesel feedstock. The cellulase and xylanase production by this strain was improved when EFB was pretreated with alkaline. When alkaline-pretreated EFB was added with palm kernel cake (PK) as an alternative nitrogen source and the culture conditions were optimized through response surface methodology (RSM), the production of lipid, cellulase and xylanase were increased up to 88.5 ± 4.9 mg/gds, 26.1 ± 0.1 U/gds and 59.3 ± 0.3 U/gds, respectively. This study reveals the potential use of in situ cellulolytic enzymes producing fungi and the optimal conditions for direct conversion of lignocellulosic biomass into lipid.

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Keywords
Cellulase; Lignocellulosic biomass; Lipid; Oleaginous fungi; Xylanase
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Bioconversion of lignocellulosic palm byproducts into enzymes and lipid by newly isolated oleaginous fungi
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Publisher
Database: Elsevier - ScienceDirect
Journal: Biochemical Engineering Journal - Volume 88, 15 July 2014, Pages 95–100
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