NO 특허등록번호 특허명 1 10-0700447 Filter cartridge for sewage and wastewater purification equipment 2 10-0517837 Sludge collector chain conveyor 3 10-0407516 Coagulation for water treatment paddle 4 10-1214987 Sludge discharge device of sedimentation hopper 5 10-1285410 Non-metal idle sprocket 6 10-1260798 Automatic drainage device for condensate in odor prevention equipment at terminal treatment plant 7 10-1312608 Scum suction removal device of water treatment system including transfer function 8 10-1227681 Water treatment device with adjustable cover length 9 10-0978038 Outlet, waste water pollutant and phosphorus treatment device including scum separation means using water level difference 10 10-0785893 Water treatment device equipped with automatic cleaning immersion separator