公开(公告)号：US08545685B2

公开(公告)日：2013-10-01

申请号：US13127307

申请日：2009-04-20

申请人： Nanping Xu ,  Weixing Li ,  Weihong Xing ,  Yiqun Fan

发明人： Nanping Xu ,  Weixing Li ,  Weihong Xing ,  Yiqun Fan

IPC分类号： B01D61/42 ,  B01D61/58

CPC分类号： B01D61/445 ,  B01D61/027 ,  B01D61/422 ,  B01D61/58 ,  C07C51/44 ,  C12N1/22 ,  C12P7/56 ,  C07C59/08

摘要： Provided is a cleaning process of producing lactic acid. Firstly saccharification liquid is prepared through saccharated materials, then fermented with nutritive materials and lactic acid bacteria, and liquid alkali is used to adjust the pH. The fermentation broth is filtrated with porous membrane, and the lactic acid bacteria in the interception liquid are then reintroduced into the porous membrane for recycling. The permeate from porous membrane is subjected to nanofiltration to be decolored and purified. The concentrated solution from nanofiltration and the cleaning liquid from fermentation tank and its affiliated equipment are filtrated and sterilized by using ceramic membrane, and then are reintroduced into the fermentation unit for recycling. The permeate from nanofiltration is then subjected to bipolar electrodialysis system to prepare lactic acid, and the liquid alkali produced at the same time is reintroduced into the fermentation tank for recycling. The lactic acid is finally concentrated by using vacuum distillation. The process recycles the bacteria in the liquid alkali and matured fermentation broth, and is characterized by low material consumption and emission, low pollution, reduced cost and cleanness and environmentally protection of the whole production process.

摘要翻译： 提供了生产乳酸的清洗方法。 首先通过糖化物质制备糖化液，然后用营养物质和乳酸菌发酵，并使用液态碱调节pH值。 用多孔膜过滤发酵肉汤，然后将拦截液中的乳酸菌重新引入多孔膜进行再循环。 将来自多孔膜的渗透物进行纳滤，进行脱色和纯化。 来自纳滤的浓缩溶液和来自发酵罐及其附属设备的清洗液通过陶瓷膜过滤灭菌，然后重新引入发酵单元进行再循环。 然后将来自纳滤的渗透物进行双极电渗析系统以制备乳酸，同时产生的液碱再次引入发酵罐中进行再循环。 最后通过真空蒸馏浓缩乳酸。 该工艺循环利用液态碱和成熟发酵液中的细菌，其特点是材料消耗低，污染少，成本低廉，整个生产过程的清洁和环保。

公开(公告)号：US20110210001A1

公开(公告)日：2011-09-01

申请号：US13127307

申请日：2009-04-20

申请人： Nanping Xu ,  Weixing Li ,  Weihong Xing ,  Yiqun Fan

发明人： Nanping Xu ,  Weixing Li ,  Weihong Xing ,  Yiqun Fan

IPC分类号： C12P7/56 ,  B01D61/44 ,  C07C59/08 ,  C12R1/225

CPC分类号： B01D61/445 ,  B01D61/027 ,  B01D61/422 ,  B01D61/58 ,  C07C51/44 ,  C12N1/22 ,  C12P7/56 ,  C07C59/08

摘要： Provided is a cleaning process of producing lactic acid. Firstly saccharification liquid is prepared through saccharated materials, then fermented with nutritive materials and lactic acid bacteria, and liquid alkali is used to adjust the pH. The fermentation broth is filtrated with porous membrane, and the lactic acid bacteria in the interception liquid are then reintroduced into the porous membrane for recycling. The permeate from porous membrane is subjected to nanofiltration to be decoloured and purified. The concentrated solution from nanofiltration and the cleaning liquid from fermentation tank and its affiliated equipment are filtrated and sterilized by using ceramic membrane, and then are reintroduced into the fermentation unit for recycling. The permeate from nanofiltration is then subjected to bipolar electrodialysis system to prepare lactic acid, and the liquid alkali produced at the same time is reintroduced into the fermentation tank for recycling. The lactic acid is finally concentrated by using vacuum distillation. The process recycles the bacteria in the liquid alkali and matured fermentation broth, and is characterized by low material consumption and emission, low pollution, reduced cost and cleanness and environmentally protection of the whole production process.

摘要翻译： 提供了生产乳酸的清洗方法。 首先通过糖化物质制备糖化液，然后用营养物质和乳酸菌发酵，并使用液态碱调节pH值。 用多孔膜过滤发酵肉汤，然后将拦截液中的乳酸菌重新引入多孔膜进行再循环。 对来自多孔膜的渗透物进行纳米过滤以进行脱色和纯化。 来自纳滤的浓缩溶液和来自发酵罐及其附属设备的清洗液通过陶瓷膜过滤灭菌，然后重新引入发酵单元进行再循环。 然后将来自纳滤的渗透物进行双极电渗析系统以制备乳酸，同时产生的液碱再次引入发酵罐中进行再循环。 最后通过真空蒸馏浓缩乳酸。 该工艺循环利用液态碱和成熟发酵液中的细菌，其特点是材料消耗低，污染少，成本低廉，整个生产过程的清洁和环保。