PROCESS FOR TREATING RESIDUAL SERUM IN THE CHEESE FABRICATION, ELIMINATING ITS CONTAMINATING POWER AND OBTAINING L-LACTIC ACID

摘要

Process for treating residual serum in the fabrication of cheese, thereby eliminating its contaminating power and obtaining L-lactic acid, characterized in that it comprises initially a fermentor with temperature and pH regulation for seeding an inoculum; a second industrial fermentor connected to an alkali container through a metering pump actuated by a pH-meter and, finally, the process gives successively passage to the fluid coming from the industrial fermentor through a press filter, through a hollow fiber microfilter and through ion exchange resin columns. The resulting final product has a pH lower than 2, free of nitrites and toxic substances; lactic acid with a high content of isomer l is obtained.