Preparation and Mechanism of a New Enhanced Flocculant Based on Bentonite for Drinking Water

Table 3

The influence of additives on coagulation behaviors of BTA while PAC content was 15% (200NTU diatomite suspension).

Ferrous sulfate (%)	Aluminium sulfate (%)	BTA (mg/L)	Rate of deturbidity (%)	Settling time (s)
0	25	100	98.8	20
5	20	100	98.7	20
10	15	100	98.7	60
15	10	100	98.3	60
20	5	100	98.4	60
25	0	100	98.0	60
—	—	PAC (100)	98.5	60
—	—	PAC (50)	97.7	90