A sewage is discharged in a river flowing at a velocity of 0.25 m/sec. The D.O content and BOD5 of mixture at the point of disposal is 2.50 mg/l and 15 mg/l. The deoxygenation constant and reaeration constant on base are 0.20 day−1 and 0.40 day−1 respectively. The distance (in km, rounded off to nearest integer) from point of disposal where critical D.O. deficit will occur is 62.5

A sewage is discharged in a river flowing at a velocity of 0.25 m/sec.

1.	A sewage is discharged in a river flowing at a velocity of 0.25 m/sec. The D.O content and BOD5 of mixture at the point of disposal is 2.50 mg/l and 15 mg/l. The deoxygenation constant and reaeration constant on base are 0.20 day−1 and 0.40 day−1 respectively. The distance (in km, rounded off to nearest integer) from point of disposal where critical D.O. deficit will occur is 62.5
Answer» A sewage is discharged in a river flowing at a velocity of 0.25 $m / s e c$ . The D.O content and $B O D_{5}$ of mixture at the point of disposal is 2.50 $m g / l$ and 15 $m g / l$ . The deoxygenation constant and reaeration constant on base are 0.20 $d a y^{- 1}$ and 0.40 $d a y^{- 1}$ respectively. The distance (in km, rounded off to nearest integer) from point of disposal where critical D.O. deficit will occur is 62.5