Environmental Engineering Quality and Characteristics of Sewage

In the analysis of unseeded domestic waste water BOD test, the data used is 6ml of waste in a 300 ml bottle, initial DO of 8 mg/l and 5 day DO is 4 mg/l. Compute 5day BOD of waste water. 

1
220 mg/l
2
150 mg/l
3
145 mg/l
4
200 mg/l

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