10. A 15,000 ft" conventional activated sludge system has a recycle ratio of 0.38, an influent flow rate of 17,000 ft*/day, a mixed liquor volatile suspended solids (MLVSS) concentration of 280 mg/L, and an influent BOD, of 60 mg/L. What is most nearly the recycle rate of the system? (A) 2800 ft*/day (B) 3600 ft*/day (C) 5300 ft*/day (D) 6500 ft*/day A.

10. A 15,000 ft" conventional activated sludge system has a recycle ratio of 0.38, an influent flow rate of 17,000 ft/day, a mixed liquor volatile suspended solids (MLVSS) concentration of 280 mg/L, and an influent BOD, of 60 mg/L. What is most nearly the recycle rate of the system? (A) 2800 ft/day (B) 3600 ft/day (C) 5300 ft/day (D) 6500 ft*/day A.

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

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A 15-kilometer-long pipe with a pipe diameter of one meter transports water at a speed of one meter per second. The pipe has a friction coefficient of 0.005. Calculate the frictional head loss?

Question

10. A 15,000 ft³ conventional activated sludge system
has a recycle ratio of 0.38, an influent flow rate of
17,000 ft°/day, a mixed liquor volatile suspended solids
(MLVSS) concentration of 280 mg/L, and an influent
BOD, of 60 mg/L. What is most nearly the recycle rate
of the system?
(A) 2800 ft/day
(B) 3600 ft/day
(C) 5300 ft/day
(D) 6500 ft°/day
А.
В.
O000

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An activated sludge wastewater treatment system was designed and operated in a steadystate under the following conditions:• Reactor volume of 10,000 m3in total;• Sludge concentration (MLSS) of 3200 mg/L in the reactor;• Return sludge concentration at 8000 mg/L (the underflow of the secondary clarifier)• Each day, 400 m3 of underflow sludge (return sludge) was wasted as excesssludge;What is the average Sludge Residence Time (SRT)?
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