Bill MORRISSEY,Colm O''BRIEN,Magda HOGAN,Eamon HOGAN,Parikshit Rameshwar SAWDEKAR,Ramesh Babu PADAMATI
申请号：
MX2019001560
公开号：
MX2019001560A
申请日:
2017.08.08
申请国别(地区):
MX
年份:
2019
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 basic metal hydroxide to form a precipitate comprising calcium and phosphate, and separating the precipitate from the whey by-product to provide a clarified whey by-product. The clarified whey by-product is fermentated by a bacterium 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. The methods of the invention may also be employed with milk permeates.Se describe un proceso para producir ácido láctico puro a partir de un subproducto del suero de leche rico en lactosa y minerales, por ejemplo, permeado del suero de leche deslactosado o permeado del suero de leche concentrado. El método comprende etapas anteriores de neutralización del subproducto del suero de leche con un hidróxido metálico básico para formar un precipitado que comprende calcio y fosfato y separar el precipitado del subproducto del suero de leche para proporcionar un subproducto del suero de leche clarificado. El subproducto del suero de leche clarificado es fermentado por una bacteria capaz de bioconvertir lactosa a ácido láctico para proporcionar un c
