... Solid poly ferric sulfate SPFS 1,Avirulent, harmless, safe and reliable 2,ISO9001:2000 3,Water treatment NAMESolid ... sedimentation velocity; 3. Good water purification effect, non-toxic, safe and reliable;4. Good effect in decoloring, deoiling, dehydrating, ... of industrial waste water with similar application procedures. It is very effective for high-colority, high COD/BOD water, particularly when ...