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Production of lipase by repeated batch fermentation with immobilized Rhizopus arrhizus

Paper ID Volume ID Publish Year Pages File Format Full-Text
36690 45142 2005 9 PDF Available
Title
Production of lipase by repeated batch fermentation with immobilized Rhizopus arrhizus
Abstract

Lipase produced by immobilized mycelium from Rhizopus arrhizus in submerged fermentation was studied. The highest lipase activity of 315 u/mL was achieved at 26.5 °C, 130 rpm and 100 mL medium in 250 mL flask consisting of (%): soybean flour 4.0 (w/v), peanut oil 1.0 (v/v), MgSO4 0.1 (w/v), K2HPO4 0.5 (w/v), (NH4)2SO4 0.2 (w/v), after 96 h of cultivation. Repeated batch fermentation by immobilized mycelium was tested and the time to replace, the volume of the replaced medium and the optimal composition of the medium for replacing during the repeated batch fermentation were optimized. Immobilized cells showed high stability for repeated use. Nine repeated batches could be carried out in flasks for 140 h and six repeated batches in 5 L fermentor when the substitute culture medium consisted of (%): soybean flour 3.0 (w/v), peanut oil 0.5 (v/v) and the culture medium was replaced by 67–83%. The lipase productivity increased from 3.1 u/mL h in batch fermentation to 17.6 u/mL h in repeated batch fermentation, which was 5.6 times as high as that in batch fermentation.

Keywords
Lipase; Repeated batch fermentation; Rhizopus arrhizus
First Page Preview
Production of lipase by repeated batch fermentation with immobilized Rhizopus arrhizus
Publisher
Database: Elsevier - ScienceDirect
Journal: Process Biochemistry - Volume 40, Issue 6, May 2005, Pages 2095–2103
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering