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Effect of volumetric power input by aeration and agitation on pellet morphology and product formation of Aspergillus niger

Paper ID Volume ID Publish Year Pages File Format Full-Text
3948 200 2010 8 PDF Available
Title
Effect of volumetric power input by aeration and agitation on pellet morphology and product formation of Aspergillus niger
Abstract

The effect of the total volumetric power input under different aeration and agitation intensities on pellet morphology and glucoamylase production by Aspergillus niger AB1.13 was investigated in a 28 L stirred tank reactor. The pellet macro-morphology including pellet size and concentration was determined by the laser diffraction technique and digital image analysis. The pellet micro-morphology including pellet internal and surface structure was characterized by microscopic image analysis of pellet slices and sedimentation velocity measurements. The total volumetric power input, which comprises the volumetric power input by aeration and agitation, was kept constant for all cultivations, while the volumetric power input by aeration increased by the same degree as the volumetric power input by agitation decreased. Results revealed a notable variation in morphological data between pellets grown at different ratios of aeration to agitation, by which glucoamylase production yields were correspondingly altered. An increasing ratio of the volumetric power input by aeration resulted in a significant decrease in pellet size, a considerable increase in pellet concentration, a less compact surface structure of the pellets and a favorable production of glucoamylase.

Keywords
Aspergillus niger; Aeration; Agitation; Pellet morphology; Product formation; Glucoamylase
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Effect of volumetric power input by aeration and agitation on pellet morphology and product formation of Aspergillus niger
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Publisher
Database: Elsevier - ScienceDirect
Journal: Biochemical Engineering Journal - Volume 49, Issue 2, 15 April 2010, Pages 213–220
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