6.
b, c, f. (para 5-4a)
7.
c, e, f. (par a 5-4b (1) )
8.
20 (para 5-4b (3))
9.
4" (para 5-4b(4))
10.
3
(para 5-4b(4))
11.
b, c, f, h, i. (para 5-5a)
12.
calcium hypochlorite and ferric chloride. (para 5-6a)
13.
The rate of feed. (para 5-6a)
14.
diatomaceous earth and pulverized Iimestone. (paras 5-6, 5-6b, d)
15.
sludge concentrator tank. (para 5-7f)
16.
reverse flow. (para 5-8c)
17.
a
(para 5-8a)
18.
a, b, d. (paras 5-8a,b; 5-7e)
19.
batch. (para 5-10b)
20.
2.2 gal/hr 26
Chlorine demand = 5 ppm
Chlorine residual = 2 ppm
Chlorine dosage = 7 ppm
Calcium hypochlorite is 70 percent chlorine;
therefore, 7
= 10 ppm Ca(CI0)2
.70
is required. 10 ppm = scale
reading of 2.2 (gal/hr) (see figure 5-13)
21.
2 ppm
5,000 ppm x 1 m
= 5 ppm
1,000 ml
Chlorine dosage = 5 ppm
Chlorine residual = 3 ppm
Chlorine demand = 2 ppm (para 5-10b(4))
MD0160
5-51