An activated sludge wastewater treatment system was designed and operated in a steady state under the following conditions: • Reactor volume of 10,000 m3 in 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 excess sludge; What is the average Sludge Residence Time (SRT)?
An activated sludge wastewater treatment system was designed and operated in a steady state under the following conditions: • Reactor volume of 10,000 m3 in 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 excess sludge; What is the average Sludge Residence Time (SRT)?
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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An activated sludge wastewater treatment system was designed and operated in a steady
state under the following conditions:
• Reactor volume of 10,000 m3
in 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 excess
sludge;
What is the average Sludge Residence Time (SRT)?
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