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Recovery of lactic acid from kitchen garbage fermentation broth by four-compartment configuration electrodialyzer

Paper ID Volume ID Publish Year Pages File Format Full-Text
36291 45127 2006 7 PDF Available
Title
Recovery of lactic acid from kitchen garbage fermentation broth by four-compartment configuration electrodialyzer
Abstract

Four-compartment configuration electrodialyzer was employed to recover and concentrate lactic acid from kitchen garbage fermentation broth that contains mainly ammonium lactate and reducing sugar. Some parameters were examined under different processes of electrodialysis, such as the changes of lactic acid concentration, pH, the recovery ratio of lactic acid, the electric current efficiency and the permeation ratio of reducing sugar. The recovery ratio of lactic acid was over 89.5% in the case of 12-h electrodialysis under 2.0 A dm−2 current density, whereas the permeation ratio of reducing sugar and ammonia was less than 0.97 and 0.15%, respectively. Under this condition, the average current efficiency was over 93%, and concentration of lactic acid in permeate solution after electrodialysis increased by about 2.2-fold than that in feed solution. Furthermore, when lactic acid was fed at intervals, the concentration of lactic acid in permeate solution was increased by 5.1-fold, which was up to 162.8 g dm−3. The results of experiments indicate that the ammonium lactate in the fermentation broths can be conversed into lactic acid, and the lactic acid can been recovered and concentrated by four-compartment configuration electrodialyzer.

Keywords
Electrodialysis; Lactic acid; Ion exchange membrane; Kitchen garbage fermentation broth
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Recovery of lactic acid from kitchen garbage fermentation broth by four-compartment configuration electrodialyzer
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Publisher
Database: Elsevier - ScienceDirect
Journal: Process Biochemistry - Volume 41, Issue 1, January 2006, Pages 152–158
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