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Study on acid-hydrolysis of spent cells for lactic acid fermentation

Paper ID Volume ID Publish Year Pages File Format Full-Text
4982 265 2006 5 PDF Available
Title
Study on acid-hydrolysis of spent cells for lactic acid fermentation
Abstract

To reduce nutrient cost for lactic acid production, spent cells, a by-product in fermentation processes, were used as a nutrient source and the treatments of spent cells were investigated in this study. Untreated spent cells did not show significant effect on lactic acid production. After acid-hydrolysis, spent cells gave an increase in productivity to some extent, but the low glucose consumption indicated a nutrient limitation. The nutrient limitation was overcome easily by supplementing a small amount of yeast extract (YE). The combination of 5 g/L YE and the spent cell hydrolyzate (SCH) had high performance in lactic acid production relative to 15 g/L YE. Moreover, two kind of acid-hydrolysis methods, diluted acid based hydrolysis and concentrated acid based hydrolysis, were also compared. The diluted acid based hydrolysis had the advantages over the concentrated acid based one in lactic acid production due to its less nutrient destruction and lower salt inhibition. When diluted acid based SCH was supplemented, YE supplementation could be cut down to 20% with no significant decrease in productivity and yield.

Keywords
Spent cells; Reuse; Yeast extract; Acid-hydrolysis; Lactic acid fermentation
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Publisher
Database: Elsevier - ScienceDirect
Journal: Biochemical Engineering Journal - Volume 28, Issue 1, February 2006, Pages 87–91
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