After the flocculation of wastewater being acidified and neutralized and 0.4% of poly aluminum ferric sulphate(PFAS),the removal rate of COD can reach above 50% and the chroma decreases four times.

• 经酸析、中和工艺处理后的废水与0.；4%25的聚合硫酸铝铁进行混凝处理后；废水的COD单元去除率仍可达50%25以上；色度降低了4倍。