In a sludge digestion tank if the moisture content of sludge V1 litres is reduced from p1% to p2% the volume V2 is
A. $$\left( {\frac{{100 + {{\text{p}}_1}}}{{100 - {{\text{p}}_2}}}} \right){{\text{V}}_1}$$
B. $$\left( {\frac{{100 - {{\text{p}}_1}}}{{100 + {{\text{p}}_2}}}} \right){{\text{V}}_1}$$
C. $$\left( {\frac{{100 - {{\text{p}}_1}}}{{100 - {{\text{p}}_2}}}} \right){{\text{V}}_1}$$
D. $$\left( {\frac{{100 + {{\text{p}}_2}}}{{100 - {{\text{p}}_1}}}} \right){{\text{V}}_1}$$
Answer: Option C
This Question Belongs to Civil Engineering >> Waste Water Engineering
The effluent of a septic tank is
A. Fit for discharge into any open drain
B. Foul and contains dissolved and suspended solids
C. As good as that from a complete treatment
D. None of these
The bottom of the sewage inlet chamber of septic tanks, is provided an outward slope
A. 1 in 5
B. 1 in 10
C. 1 in 15
D. 1 in 20
Drop manholes are the manholes
A. Without entry ladders
B. Without manhole covers
C. With depths more than 3.5 m
D. Having drains at different levels
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