Page 241 - Water and Wastewater Engineering Design Principles and Practice

6-18 WATER AND WASTEWATER ENGINEERING

(a)

(b)
FIGURE 6-10
Jar test apparatus with turbid water (a) and three samples during flocculation (b).
(Source: Mackenzie L. Davis.)

Jar test I

Jar numbers
1 2 3 4 5 6
pH 5.0 5.5 6.0 6.5 7.0 7.5
Alum dose (mg/L) 10 10 10 10 10 10
Turbidity (NTU) 11 7 5.5 5.7 8 13