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Determine the Size and Number of Aeration Basins?
For a community of 100,000, determine the size and number of aeration basins in a municipal activated sludge treatment facility. The wastewater characteristics are:
Average per-capita flow rate = 100gal/capita-day
Hydraulic residence time = 6 hrs
Wastewater concentration
BOD5 = 220mg/L
SS = 220 mg/L
Ans: Average flow rate = (100 gal/capita-day)(100.000pop)(106gal/Mgal)=10 Mgal/day
The size of the aeration basin may be determined based on a typical value for hydraulic residence time of 6 hr (4-8 hrs is the range) for a conventional activated sludge process.
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