Attempts were made to develop an effective, low cost process for cleaning tar and dust contaminated water (TDCW) using activated charcoal. A dose of 1–1.5 mg/100 ml polluted water was used to bring pH, chloride and hardness of water within permissible limits. Three-stage process for cleaning TDCW was developed using waste charcoal obtained from gasifier. Charcoal having the size of either 0.5 - 1.0., 1.0 - 1.5, or 1.5 - 2 cm employing three bed heights (25, 35, and 50 cm) were used. The use of 0.5–1.0 cm charcoal and 35 cm high bed was found to be effective to reduce turbidity. The charcoal was activated at different temperatures and duration.
Gasifier, Charcoal, Activated carbon, Turbidity
