PENGOLAHAN AIR GAMBUT DENGAN KOAGULAN CAIR HASIL EKSTRAKSI LEMPUNG ALAM DESA CENGAR MENGGUNAKAN LARUTAN H 2 SO 4

Abstract

Liquid coagulant from Cengar clay was used for peat water treatment. The steps for
producing liquid coagulant were clay calcination at 500 o C for 3 hours and extraction by
0.2 mol H 2 SO 4 solution with variation of temperature (30, 60, 100 o C) and time (1, 2, 3
hours). The coagulants were tested for peat water coagulation by measuring pH,
turbidity, and TDS. The results were compared to PERMENKES No.416/MENKES/
PER/IX/1990 “Tentang Syarat-syarat dan Pengawasan Kualitas Air”. After coagulation,
the parameters of peat water were improved. The pH value of peat water after
coagulation was between 5.0-8.5, turbidity 2.0-6.5 NTU, and TDS 250-320 mg/L.
Compared to No.416/MENKES/PER/IX/1990, turbidity and TDS from all samples after
coagulation have met the water quality standard. The best coagulant was K 100-2 with the
value of the parameters after coagulation were 8.39 of pH, 4.75 NTU of turbidity and
258 mg/L of TDS. According to the results, it can be concluded that liquid coagulant
from Cengar clay can be used for peat water treatment.