# (a)The 5-day BOD of a sewage sample is 180 mg/L at 15°C. What is the BODu...

###### Question:

(a)The 5-day BOD of a sewage sample is 180 mg/L at 15°C. What is the BODu when k is 0.52 d-1 at 25°C? (use the Arrhenius equation, kt2=kt1?t2-t1 where ?=1.135 for 4-20°C and 1.056 for 20 -30°C

(b)Graph the BOD as a function of time for the previous problem for both 15°C and 25°C. What do you observe?

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