KINERJA KOAGULAN CAIR BERBASIS LEMPUNG ALAM DALAM PENGOLAHAN AIR GAMBUT

Abstract

Liquid coagulant from Cengar clay has been used for coagulation of peat water. Based on temperature differences leached, it was obtained two types of liquid coagulant that were KC80 and KC100 with pH of 1.3 which were then used for improving the color and turbidity of peat water. KC80 contained Al and Fe of 223.7 mg L- 1 and 10.3 mg L-1, respectively. The content of Al and Fe at KC100 were 224.9 mg L-1 and 10.5 mg L-1. Analysis results of color and turbidity natural peat water by UV - Vis and turbidimeter were 1676 TCU and 73.4 NTU, respectively. After coagulation, KC80 was more efficient coagulant than KC100 in reducing color and turbidity of peat water. Coagulation efficiency was obtained 83,4 % for color and 68,6 % for turbidity. Value of peat water turbidity after coagulation has met the requirements of water quality which is regulated in PERMENKES 416/MENKES/PER/IX/1990.