inter Font Paragraph Styles A biological reactor has an influent rate of 100,000

Question

inter Font Paragraph Styles A biological reactor has an influent rate of 100,000 gal/day with a BODs of 200 mg/L. The circular reactor has a depth of 8 ft and a diameter of 40 ft. What is the organic loading rate? a) 0.98 lbm/day 8. fta lbm/day c) 1.24lbm/day d) 0.56bm/day A municipality serves a population of 75,000 with a per capita wastewater flow of 110 gal/day What is the influent flow rate into the wastewater treatment plant? a) 7.5 MGD b) 1.1 MGD c) 8.25 MGD d) 0.8 MGD 9. 10. Wastewater sources are characterized by all of the different physical characteristics listed below. Which characteristic is a good indicator of the wastewater's age? a) Color b) Density c) Organic content d) Turbidity

Explanation / Answer

(8)Answer:- (b) 0.13 (lbm/day)/feet2

Solution:-

Organic loading rate = (influent rate * BOD5 )/Area

Organic loading rate = 100000*3.78*200/(pi * 202)

Organic loading rate = 60160 (mg/day)/feet2

1 mg = 2.2 *10-6 lbm

Organic loading rate = 60160*2.2*10-6 = 0.132 (lbm/day)/feet2   

(9) Answer:- (c) 8.25 MGD

(10) Answer:- (c) Organic content

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