Limit of BOD prescribed by Central Pollution Control Board for the discharge of industrial and municipal waste waters into natural surface waters is

Question

Limit of BOD prescribed by Central Pollution Control Board for the discharge of industrial and municipal waste waters into natural surface waters is (A) < 30 ppm (B) < 50 ppm (C) < 80 ppm (D) < 100 ppm

Tardigrade Admin · Accepted Answer

Strength of sewage of degree of water pollution is measured in terms of BOD (Biological oxygen demand) value. BOD may be defined as, 'number of milligrams of O 2 required for decomposition of one litre of waste or water by decomposing micro-organisms (bacteria)'. According to central pollution control board, limit of BOD prescribed is <30 ppm ( mg / d ) for 3 days at 27° C.

Q. Limit of $BO D$ prescribed by Central Pollution Control Board for the discharge of industrial and municipal waste waters into natural surface waters is

$< 30$ ppm

$< 50$ ppm

$< 80$ ppm

$< 100$ ppm

Q. Limit of BOD prescribed by Central Pollution Control Board for the discharge of industrial and municipal waste waters into natural surface waters is

<30 ppm

<50 ppm

<80 ppm

<100 ppm

Q. Limit of $BO D$ prescribed by Central Pollution Control Board for the discharge of industrial and municipal waste waters into natural surface waters is

$< 30$ ppm

$< 50$ ppm

$< 80$ ppm

$< 100$ ppm