14.1 Characterisation of the waste water (w 6)uondwnsuo -20C 300 200 5C 100 ua6fxo 0 0 10 20 30 Time(days) Oxygen consumption profiles of waste water at two different temperatures. COD=aBODz-bCOD=aBOD7 -b 14.1 Characterisation of the waste water