Biochemical oxygen demand (BOD) in a river water

Question

Biochemical oxygen demand (BOD) in a river water (A) has no relationship with concentration of oxygen in the water (B) gives a measure of Salmonella in the water (C) increases when sewage gets mixed with river water (D) remains unchanged when algal bloom occurs

Tardigrade Admin · Accepted Answer

BOD is the oxygen in mg required for 5 days in one litre of water at 20° C for the microorganisms to metabolise organic waste. BOD in a river water will increase when sewage gets mixed with river water because decomposer organisms will consume a lot of oxygen.

Q. Biochemical oxygen demand (BOD) in a river water

has no relationship with concentration of oxygen in the water

gives a measure of Salmonella in the water

increases when sewage gets mixed with river water

remains unchanged when algal bloom occurs

$BO D$ is the oxygen in mg required for $5$ days in one litre of water at $2 0^{\circ} C$ for the microorganisms to metabolise organic waste. $BO D$ in a river water will increase when sewage gets mixed with river water because decomposer organisms will consume a lot of oxygen.

Q. Biochemical oxygen demand (BOD) in a river water

has no relationship with concentration of oxygen in the water

gives a measure of Salmonella in the water

increases when sewage gets mixed with river water

remains unchanged when algal bloom occurs

BOD is the oxygen in mg required for 5 days in one litre of water at 20∘C for the microorganisms to metabolise organic waste. BOD in a river water will increase when sewage gets mixed with river water because decomposer organisms will consume a lot of oxygen.

$BO D$ is the oxygen in mg required for $5$ days in one litre of water at $2 0^{\circ} C$ for the microorganisms to metabolise organic waste. $BO D$ in a river water will increase when sewage gets mixed with river water because decomposer organisms will consume a lot of oxygen.