Q$.3$ For a rectangular grit chamber with the design data given in table Q$3$;

Table Q$3$

Flow of sewage $=50MLD$

Sp gravity of grit $=2\mathrm{.}7$

Specific gravity of organic matter$=1\mathrm{.}2$

Size of grit particle $=0\mathrm{.}21mm$

$K=0\mathrm{.}06,$

$f=0\mathrm{.}03$

Temp $=20C$

Width $=1m,$ depth $=1\mathrm{.}7m$

Detention time $=60$ s

Calculate,

i$.$ Volume of grit chamber, $m^3$

ii$.$ Area, $m^2$

iii. Length, $m$ and

iv$.$ Number of grit chambers and area, $m^2$ for a length between $10-15m$

$V_s=60\mathrm{.}6(S_p-1)*d_p**\frac{3T+70}{100}$

Note: if required, make necessary assumptions.