... purification, wastewater treatment, precision cast, paper production, pharmaceutical industry. PAC — polyaluminum chloride (CW-21)Description:This product is high- ... organic-polluted raw water is much better than other organic flocculant, furthermore, the treatment cost is lowered by 20%-80 ... %.2. It can lead to quick formation of flocculant (especially at low temperature) with big size and rapid ...