1. Biološka potrošnja kiseonika je mera koja se koristi za utvrđivanje količine organskih materija u vodi. 2. Biološka potrošnja kiseonika predstavlja količinu kiseonika koju organizmi (alge i bakterije) iskoriste u određenoj zapremini vode na temperaturi od 20 oCform
1. Biological oxygen demand is an approximate measure of the amount of biochemically degradable organic matter present in a water sample 2. Biological oxygen demand is the amount of oxygen required for the aerobic micro-organisms, present in the sample, to oxydise the organic matter to the stable inorganic form