Abstract: Higheffect coagulating pilotscale experiment on Hun River water source, contaminated by industrial sewage, was carried out in low temperature and low tuibidity period. The optimum dosage was determined as: Polyaluminum ferric chloride (PAFC) 30 mg/L and Polyacrylamide (PAM) 0.2 mg/L. Furthermore the pilotscale experiment results show that in the loading range from 2 to 3 m3/h, the processed water can reach the standard for industry utilization. It is also shown that increasing the water temperature can enhance the effect of coagulation.

Key words: water treatment, micro-polluted wate, low temperature & turbidity and high chromaticity, hi-effect coagulation, industry water standard