Skimming tank is a crucial part of wastewater treatment, designed to remove floating waste materials such as grease, oil, and light solids. By separating these contaminants from water, skimming tanks improve the overall efficiency of treatment plants and protect downstream processes from blockages or damage. They come in various designs, including circular and rectangular tanks, and operate using gravity or mechanical skimmers. Widely used in municipal and industrial treatment facilities, skimming tanks ensure cleaner water output and compliance with environmental standards. This article explores their working principle, design considerations, and key benefits in modern wastewater management.