Literature DB >> 22093977

Efficient production of D-(-)-lactic acid from broken rice by Lactobacillus delbrueckii using Ca(OH)2 as a neutralizing agent.

Shinta Nakano1, Charles U Ugwu, Yutaka Tokiwa.   

Abstract

Effects of Ca(OH)(2), NH(4)OH, and NaOH as neutralizing agents for efficient recovery of lactic acid was investigated. Lactic acid was produced from broken rice in a simultaneous saccharification and fermentation (SSF) process with Lactobacillus delbrueckii. Consumption of glucose (from broken rice) by the cells and the cell growth were the best with Ca(OH)(2) among the three neutralizing agents used. Maximum productivities of lactic acid reached with Ca(OH)(2), NH(4)OH, and NaOH were 3.59 g l(-1) h(-1), 1.51 g 1(-1) h(-1), and 1.40 g l(-1) h(-1), respectively. Ca(OH)(2) reduced the lactate molarity of the fermentation broth, and thus resulted in the highest lactic acid productivity. Furthermore, it was apparently clear that divalent cation (Ca(2+)) was more effective in neutralizing the cultures compared to monovalent (Na(+) and NH(3)(+)) cations.
Copyright © 2011 Elsevier Ltd. All rights reserved.

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Year:  2011        PMID： 22093977     DOI： 10.1016/j.biortech.2011.10.017

Source DB:  PubMed          Journal:  Bioresour Technol        ISSN： 0960-8524            Impact factor:   9.642


  12 in total

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