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Scaling-up of simultaneous saccharification and fermentation of lactic acid from microwave-alkali-treated empty fruit bunches

Hassan, N. and Idris, A. and El Enshasy, H. A. and Malek, R. A. (2017) Scaling-up of simultaneous saccharification and fermentation of lactic acid from microwave-alkali-treated empty fruit bunches. BioResources, 12 (4). pp. 8001-8013. ISSN 1930-2126

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Abstract

The goal of this work was to scale up the simultaneous saccharification and fermentation (SSF) of lactic acid using microwave-alkali-pretreated empty fruit bunches (EFB) from a scale of 16 L to a scale of 150 L. To facilitate the scaling-up process of lactic acid production by Rhizopus oryzae NRRL 395, a scaling-up criterion of constant kLa value was applied. Operating conditions, such as aeration rate and superficial velocity, were varied and evaluated on both scales (16-L and 150-L). The highest lactic acid yield of 6.8 g/L was obtained under an operating condition of 1 vvm (0.061 s-1). Parallel aeration rates were determined for the 150-L fermenter system to obtain the same kLa value as the 16-L fermenter. An operational condition of 0.5 vvm dissolved oxygen supply in the 150-L fermenter was optimal to support an identical value of kLa and production rate of lactic acid for both scales.

Item Type:Article
Uncontrolled Keywords:Empty fruit bunch, Lactic acid, Rhizopus oryzae, Scaling-up
Subjects:T Technology > TP Chemical technology
Divisions:Chemical Engineering
ID Code:75443
Deposited By: Widya Wahid
Deposited On:22 Mar 2018 19:09
Last Modified:22 Mar 2018 19:09

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