Simultaneous Dewatering & Pasteurization - FKC Class A Process
Lime is added to liquid biosolids to raise the pH to 12 to meet EPA vector attraction reduction requirements. The lime treated biosolids are then flocculated with polymer, prethickened in an FKC rotary screen thickener, and then fed to a steam heated FKC screw press. Inside the screw press the biosolids are dewatered and heated to meet EPA pathogen reduction requirements. Screw press outlet consistencies are usually 30 to 50% dry solids.