LAJU SERAPAN TUMBUHAN AIR REED (Phragmites australis) DAN CATTAIL (Typha angustifolia) DALAM SISTEM CONSTRUCTED WETLAND UNTUK MENURUNKAN COD AIR LIMBAH

Abstract

This research measured the Specific Utilization Rate (SUR) of Reed and Cattail and compared the performance and growth between Cattail and Reed. The experiment was done in laboratory scale using batch condition with COD concentration (200 mg/L and 400 mg/L). The results showed that the utilization rate of Cattail was faster (11.51 mg/mg/day) than that of Reed on 200 mg/L of COD. The Reed utilization rate was  3.32 mg/mg/day on 400 mg/L COD. At COD level of 200 mg/L there was a significant difference between the utilization rate of Cattail and Reed, but not at 400 mg/L COD. It was found out that with the combination of plant and media, Cattail had better ability to reduce COD level from 200 mg/L and remaining 3.80 mg/L, while Reed performed the highest reduction of 400 mg/L COD and remaining 147.30 mg/L.