Question: 2 A raw sewage COD and BOD analyses results are as follows: 5 0 0 m g L COD, 1 0 0 m g 1

2 A raw sewage COD and BOD analyses results are as follows: 500mgLCOD,100mg1 BOD Which below statement(s) is true for this wastewater
a. This wastewater can not efficiently be treated by biological methods
b. There may be untreated industrial wastewater discharge to sewer
c. This is a typical domestic wastewater
d. There is no significant amount of any oxidizable ions (e.g., ferrous iron, sulfide) in the wastewater.
2 A raw sewage COD and BOD analyses results are

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