Glanbia Ingredients Ireland Designated Activity Company
发明人:
申请号：
EP16183196.1
公开号：
EP3282018A1
申请日:
2016.08.08
申请国别(地区):
EP
年份:
2018
代理人:
摘要：
A process for producing pure lactic acid from a whey by-product rich in lactose and minerals, for example delactosed why permeate or concentrated whey permeate, is described. The method comprises upstream steps of neutralising the whey by-product with a metal hydroxide to precipitate divalent ions, and separating the precipitated divalent ions from the whey by-product to provide a clarified whey by-product. The clarified whey by-product is fermentated by a bacteria capable of bioconversion of lactose to lactic acid to provide a fermentation broth containing a lactic acid salt. In the downstream steps, the fermentation broth is acidified to release lactic acid from the lactic acid salt, precipitate from the broth produced by acidification is removed, and the acidified fermentation broth is treated to recover pure lactic acid by removal of residual salts, and water, and optionally protein. The process of the invention produces lactic acid having a purity of 80-98% and an isomeric purity of >；98% L-lactic acid using a process that employs upstream removal of divalent salts by chemical precipitation, bacterial fermentation of the demineralised substrate, and minimum downstream processing of the fermentation broth.
