How to correlate COD/BOD ratio and biodegradability? - ResearchGate
Some literature sources give such information: when ratio BOD5/CODCr is: > 0.5 than easily biodegradable 0.4 – 0.5 average biodegradable 0.2 – 0.4 slowly biodegradable < 0.2 not biodegradable CODCr/BOD52 – not easily biodegradable ... Generally COD always...