Step 1:
T=Gt/G
T=30000/750= 40sec
Q=7300 m3/day
Q=7300/86400=0.084 m3/sec
V=Qxt
V=0.084x40=3.36 m3
Step 2:
Consider H=1.25W
L=B=W
WXWX1.25W=3.36
1.25W3=3.36
W=1.39m
Consider it as 1.40m L=B=1.40M
D=1.25x1.4=1.75m
D.T=Volume/(Q)=1.4x1.4x1.75/0.084=40.83 sec
This design is satisfying the requirement
Step 3:
Now calculate the diameter of the impeller
P=G2V
P=750x750x1.31x10-3x1.4x1.4x1.75
P=2528Watts
N=95 rpm=95/60=1.58 rps
P=KtN3D5
2528=4.80x1000x1.583xD5
D=0.668m
Consider
Diameter of impeller=0.7m
using FE refrenece maunal Ex. 1 Size a square rapid-mixing basin, and provide specifications for mixer....