The result indicates that the craft effectively removes the impurites in the residue such as reducing sugar,pigment,polymer;refined lactic acid yield can reach to above 95%;the membrane flux depression scope is lower and can resume effectively after the cleaning;the whole cost is low;r.

L-lactic acid production by batch fermentation of whey permeate using L.casei and L.lactis;

Production of L-lactic acid through fermentation by lactobacillus plantarum immobilized with sodium alginate;

Breeding of bacteria producing L-lactic acid using xylose by aerospace mutagenesis;

Under microwave radiation and catalyst,aluminum L-lactate is synthesized with L-lactic acid and aluminum.