| Based on the investigation of two typical regions that textile dyeing and finishing enterprises gathered and environmentally sensitive, heavy metal standards and toxicity analogy, sewage treatment situation, analysis of antimony content in sediment, calculation of water environment carrying capacity and allowable emission concentration, etc, the emission limits of antimony in textile dyeing and finishing industry in environmentally sensitive area were set as 0.1 mg/L and 0.05 mg/L, respectively, according to different emission situations. The engineering case showed that separated technologies of treatment for high or low concentration of wastewater could meet the requirements of emission limits by using PFS(polymerized ferric sulfate)coagulative precipitation, and the economic cost was acceptable. |
