Development of an Automated Control System for a High-Efficiency Filtration-Type Nonpoint Pollution Treatment Facility

An automated control system was developed to enhance the treatment efficiency of nonpoint pollution with irregular inflow characteristics, such as stormwater runoff. A high-efficiency filtration-type treatment facility integrated with ICT and IoT-based remote control systems was designed and constructed. Laboratory-scale validation demonstrated excellent performance, achieving removal efficiencies over 98% for turbidity and suspended solids and over 85% for total phosphorus under optimized conditions. The system combines an upflow two-stage filtration column, airlift pump, hydrocyclone technology, and automated coagulant dosing and backwashing processes to maintain stable filter performance. Real-time monitoring and automated control algorithms enable stable, unmanned operation even under varying nonpoint pollution conditions.