This paper did lots of jar test and production test with combination of coagulants under different source water qualities.

The operating practice showed that the technology of high voltage electrocagulation composite flocculation-combination facultativeaero-A/O-chemical precipitation-activated carbon bio-filter could effectively treat pharmaceutical wastewater.

The flocculation characteristics of chitosan flocculant was studied and the removal of turbidity and organics in water was investigated with composite flocculation of chitosan flocculant.

Study of the effect of the new complex flocculant on the advanced treatment of wastewater from coking plants;

The decolorization performance of magnesium hydroxidestarch complex flocculant for dyeing wastewater is discussed.

Paint wastewater was treated with modified rectorite-natural macromolecule amylose complex flocculant.

Study on the treatment of pectin wastewater by composite flocculant;

Dewatering property on sludge by poly(dimethyldiallylammonium chloride)-polyferric sulfate composite flocculant;

Treatment of paper making wastewater with polyaluminum chloride-polyacrylamide composite flocculant;