Problem Solved: MCRT Problem - Wastewater Math
67.7 هزار بار بازدید -
12 سال پیش
-
This question comes from the
This question comes from the California Wastewater grade 2 certification exam sample questions that can be found here: http://www.swrcb.ca.gov/water_issues/....
The problem reads:
At an activated sludge wastewater treatment plant receiving 3.25 MGD, the final effluent
suspended solids concentration averages 21.2 mg/L. What would the calculated MCRT
value be when the aeration basin carries 2050 mg/L MLSS and wastes 0.0550 MGD. The
waste activated sludge has a concentration of 7980 mg/L. The aeration tank has a volume
of 1.00 MG and the secondary clarifier has an operational volume of 0.250 MG.
a. 2.5 days
b. 5.0 days
c. 7.5 days
d. 15 days
e. 42 days
http://americanwatercollege.org
The problem reads:
At an activated sludge wastewater treatment plant receiving 3.25 MGD, the final effluent
suspended solids concentration averages 21.2 mg/L. What would the calculated MCRT
value be when the aeration basin carries 2050 mg/L MLSS and wastes 0.0550 MGD. The
waste activated sludge has a concentration of 7980 mg/L. The aeration tank has a volume
of 1.00 MG and the secondary clarifier has an operational volume of 0.250 MG.
a. 2.5 days
b. 5.0 days
c. 7.5 days
d. 15 days
e. 42 days
http://americanwatercollege.org
12 سال پیش
در تاریخ 1391/01/07 منتشر شده
است.
67,726
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