The DK designation is commonly used for Acid Purification, Alcohol Purification, Antibiotic Concentration, BOD/COD Reduction, Cheese Whey Desalting, Detergent Removal, Dextrose Purification, Dye Concentration, Ethylene Glycol Purification, Heavy Metal Removal, Plating Waste, Polysaccharide Desalting, Sugar Fractionation.