engineering recuitment GATE CE 2023-24 Test Series Environmental Engineering Quality and Characteristics of Sewage
The Biodegradable Organic matter in the sample of sewage is 4 times of Non- biodegradable Organic matter in it. Assume that sample can be treated biologically and it is able to remove all the Biodegradable organic matter in it. The 5 Day BOD of this waste sample is found to be 600 mg/l at 20° C. Assume the rate constant (on base e) at 20° C is 0.23/day. Which of the following statements is/are true?
1
The Chemical Oxygen demand of the above sample is around 1097.50 mg/l
2
The BOD remains un-oxidized in the sample after 5 days is 278 mg/l
3
The ultimate BOD of the sample is 878 mg/l.
4
The BOD remains un-oxidized in the sample after 5 days is 600 mg/l.