Problem

$2$

Design a rectangular primary sedimentation tank for a community having a population of

$4$

$6$

$9$

$0$

$0$

persons with an average water consumption of

$2$

$0$

$0$

$$lpcd

$.$

$$Use SOR

$=$

$2$

$0$

m

d

$,$

L

:

W

$=$

$3$

:

$1$

$,$

detention time

$=$

$3$

$$hour$,$ Weir loading rate

$=$

$2$

$5$

$0$

m

$3$

m

$$day$.$ Take at least two units.