Michael Smith, PE co-authored an article in Journal of the New England Water Environment Association entitled “Performance of DAF Thickening for FOG Removal in Liquid Soap Manufacturing.” A contract manufacturer of soap and skincare products in Vermont needed to reduce its fats, oils, and grease (FOG) load to the local wastewater treatment plant in Essex. To achieve that goal, the manufacturer turned to a pretreatment process technology, dissolved air flotation (DAF), to lower the FOG prior to discharge to the town’s wastewater collection system.