Name: AL
E-mail: info@echtrust.com
Add: Guanlin Town ,Yixing City,Jiangsu PR,China
A. When they have biological treatment first and after they make chemical treatment. In this case they use:
70-80 ppm HNS-08
15-20 ppm Polyaluminum Chloride
1-2 ppm Anionic polyacrylamide
First we apply the PAC (contact time 3-5 min with the waste water), after then HNS-08 Water Decoloring Agent (contact time 5-10 min), and after then anionic polyacrylamide.
It will give too much economy if we'll adjust the pH 7-8, otherwise the consumption of HNS-08 will be ~20% higher.
B. When the treat first by chemicals, then the usual dosages are :
Adjustment the pH 7-8
80-100 ppm HNS-08
10-20 ppm PAC
1-2 ppm Anionic polyacrylamide