question need in 4 hours
A 4 MGD WWTP discharges a accessory advised arising into a accepting stream. The wastewater has the afterward characteristics:
BOD5= 20 mg/L
DO = 2.0 mg/L
Water Temperature = 24C
The accepting upstream from the point of acquittal has the afterward characteristics:
Flowrate = 18 cfs
BOD5= 4 mg/L
DO= 6 mg/L
Water Temperature = 27C
Cross-sectional Area = 36 sqft
a. 3.2
b. 5.2
c. 7.2
d. 8.4
The reaeration amount is estimated to be 0.4 1/day. (Base e at 20C), and the temperature alteration accessory is 1.024. the deoxygenation rate
constant is estimated to be 0.23 1/day. (Base e at 20C) and the temperature alteration accessory is 1.047. reaeration and deoxygenation are
the alone above factors affecting the attenuated oxygen absorption in the beck afterwards bond with wastewater effluent. Assume the time of
travel in the beck to ability the best attenuated oxygen arrears is 3 days. The attenuated oxygen arrears (mg/L) at this area downstream
from the point of acquittal is best nearly:
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