Liquid phase alternatives   TECHNOLOGICAL ALTERNATIVES LIQUID PHASE ALTERNATIVES Alternative 1: Hot stripping with ammonium sulfate production (Prilling). Alternative 2: Electrochemical oxidation treatment. Alternative 3: Biological treatment with fixed biomass (Trickling filter). Alternative 4: Activated sludge treatment with SBR/ASBR. Alternative 5: Biological treatment with nitrifying bacteria immobilized in gel pearls (PINBT). Alternative 6: Biological treatment: submerged membrane bed bioreactors (BRM). SELCO MC ® copyright 2008 .Privacy policy. Conditions of use and author's rights. . . .