A U.S. institute successfully developed a method for converting the scrapped potatoes from the cheese into glucose syrup, and then fermenting it into lactic acid liquid with bacteria. The electrolyte was separated by electrodialysis and heated to evaporate the water to obtain a film of polylactic acid. Polyethylene and waterproof wax packaging materials.
A US company that produces polylactic acid is a process in which corn starch is hydrolyzed to glucose and then anaerobicly fermented with lactobacillus. During the fermentation process, lactic acid is neutralized with liquid caustic soda. The fermentation broth is purified and electrodialyzed to achieve a purity of 99%. .5% L-lactic acid.
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