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

Table 4

The influence of additives on coagulation behaviors of BTA with 20% PAC (200NTU diatomite suspension).

Ferrous sulfate (%)	Aluminium sulfate (%)	BTA (mg/L)	Rate of deturbidity (%)	Settling time (s)
0	20	100	98.0	40
5	15	100	98.2	40
10	10	100	98.1	40
15	5	100	97.7	40
20	0	100	97.7	50
—	—	PAC (100)	98.4	60
—	—	PAC (50)	97.6	90