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Stress of pH and acetate on product formation of fermenting polysaccharide-rich organic waste

Paper ID Volume ID Publish Year Pages File Format Full-Text
4541 231 2008 8 PDF Available
Title
Stress of pH and acetate on product formation of fermenting polysaccharide-rich organic waste
Abstract

Effects of stress of pH and/or acetate on the fermentation product formation of polysaccharide-rich organic waste were examined in this work, with externally dosed acetate (up to 333 mmol l−1) and adjusted pH (5–9). Ethanol, acetate, and lactate were the main metabolites. Concentrations and dissociation states of acetate affected the productions of ethanol and lactate. With dosed acetate, ethanol was favorably produced at pH 6, but was completely inhibited at pH 5. On the other hand, lactate was less favorably produced with dosed acetate, but was also completely inhibited at pH 5. With no externally dosed acetate, the metabolism gradually shifted from acetate to lactate and ethanol-forming pathway with fermentation. With dosed acetate, except for at pH 5, the pathway to ethanol was strengthened with time. The acetate stress on product formation was stronger than from pH stress.

Keywords
Anaerobic processes; Fermentation; Acetic acid; Ethanol; Product inhibition; Anaerobic Digestion Model No. 1 (ADM1)
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Stress of pH and acetate on product formation of fermenting polysaccharide-rich organic waste
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Publisher
Database: Elsevier - ScienceDirect
Journal: Biochemical Engineering Journal - Volume 39, Issue 1, 1 April 2008, Pages 97–104
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
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