BEC  Group upgraded the Darsait Sewage Treatment Plant (STP) for Oman Waste Water  Services Company (Haya). The project increased capacity from 12,000 m³/day to  22,000 m³/day by replacing Archimedean screw pumps and installing new step  screens, aerators, and belt press systems. The modernized facility  significantly improved treatment efficiency and operational reliability.  BEC’s engineering expertise ensured smooth commissioning and compliance with  environmental standards under the supervision of Khatib & Alami and  Metcalf & Eddy.