Lactic Acid Yield Using Different Bacterial Strains, Its Purification, and Polymerization through Ring-Opening Reactions. (17th February 2014)

• Record Type: Journal Article
• Authors: Orozco, F. G.; Valadez-González, A.; Domínguez-Maldonado, J. A.; Zuluaga, F.; Figueroa-Oyosa, L. E.; Alzate-Gaviria, L. M.
• Other Names: He Peng Academic Editor.
• Is Part Of: International journal of polymer science. Volume 2014(2014)
• Publication Date: 2014-02-17
• Subjects: Polymers -- Periodicals; Polymers; Periodicals; 547.7
• DOI: 10.1155/2014/365310
• Languages: English
• ISSNs: 1687-9422

Abstract

Abstract : Laboratory-scale anaerobic fermentation was performed to obtain lactic acid from lactose, using five lactic acid bacteria: Lactococcus lactis, Lactobacillus bulgaricus, L. delbrueckii, L. plantarum, and L. delbrueckii lactis . A yield of 0.99 g lactic acid/g lactose was obtained with L. delbrueckii, from which a final concentration of 80.95 g/L aqueous solution was obtained through microfiltration, nanofiltration, and inverse osmosis membranes. The lactic acid was polymerized by means of ring-opening reactions (ROP) to obtain poly-DL-lactic acid (PDLLA), with a viscosity average molecular weight (Mv) of 19, 264 g/mol.