Requirements of various biochemical processes in wastewater treatment for COD and BOD concentrations in the wastewater feed
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Regarding the requirements of various biochemical processes in wastewater treatment regarding the COD and BOD concentrations of the wastewater feedstock, I’ve found in many sources that these requirements are calculated based on the BOD load, with no mention of the COD concentration of the feedwater. I’m currently confused and wondering if anyone has any information on this topic that could help those who are studying this field!
Based on the bod load, and the ratio of the two
Generally, the organic load is calculated based on BOD, as well as parameters such as oxygen demand and sludge age; typically, the B/C ratio should be above 0.3. Experience shows that it is more suitable for the influent COD of activated sludge to be below 5000 mg/l.
General B/C value: Less than 0.3 indicates low susceptibility to biodegradation； 0.3–0.35 is biodegradable ； Greater than 0.35 indicates easy biodegradation.
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