Preparation and Coagulation Behavior of a Novel Multiple Flocculant Based on Cationic Polymer, Hydroxy Aluminum, and Clay Minerals

Table 15

Coagulation behaviors of CMHa versus PAC for coal-washing wastewater treatment (original wastewater 1200 NTU).

Dosage of flocculants (mg/L)	CPAM (mg/L)	Settling time (s)	Residual turbidity (NTU)	Coagulation behaviors
SPAC (50)	5	20	19	Larger alum floc
CMHa (30)	5	15	9.4	Larger alum floc
CMHa (20)	5	15	17	Larger alum floc
SPAC (80)		150	40	Smaller alum floc
CMHa (50)		60	14	Larger alum floc
CMHa (40)		80	22	Larger alum floc