| Abstract:Polyamine fixing agent was used to treat two kinds of whitewater with different conductivities. The results showed that under both low and high conductivity conditions, the polyamine can increase the particle size of small colloids, and/or fix them directly onto the larger particles, therefore reduce the turbidity of the white water. Meanwhile, the color, cationic demand, COD and DCS content of the white water are also decreased. The performance of the polyamine is deteriorated as conductivity raise from 820 μS/cm to 5500 μS/cm, but its ability to decrease turbidity and color is not deteriorated as much. On the other hand its ability to coagulate small colloids onto large particles, reduce cationic demand, COD and DCS content are deteriorated significantly. Despite its performance is deteriorated, the polyamine still can be used in white water treatment under high conductivity conditions. |
