Question

what do you by BOD and COD ?​

Answer 1

COD or Chemical Oxygen Demand is the total measurement of all chemicals in the water that can be oxidized. TOC or Total Organic Carbon is the measurement of organic carbons. BOD- Biochemical Oxygen Demand is supposed to measure the amount of food (or organic carbons) that bacteria can oxidize.

Answer 2

BOD is the amount of oxygen which is consumed by bacteria while decomposing organic matter under aerobic conditions. The COD is the amount of oxygen required for the chemical oxidation of the organic matter in the water