An aeration basin for an activated sludge facility has the following characteristicsLength = 90 ftWidth = 30 ftLiquid depth = 12 ftMLSS=4,000 mg/LThe raw wastewater has the following characteristics:Flow = 12 MGDBOD, = 220 mg/LSuspended solids (SS) = 250 mg/LA primary clarifier is ovided that removes 25% of the BOD, an 60% of the suspended solids The return activated-sludge flow rate is 0.8 MGDIf the primary sludge solids content is 4% solids and the specific gravity is 1.0, the primary sludge volume (ft³/day) is most nearlyOA. 1,500OB. 60,000O C.600O D.4,500

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SS=4,000 mg/L raw wastewater has the following characteristics: w=12 MGD Os=220 mg/L pended solids (SS) = 250 mg/L amary clanifier is provided that removes 25% of the BODs an 60% of the s primary sludge solids content is 4% solids and the specific gravity is 1.C A. 1,500 B. 60,000 C. 600 D.4,500

SS=4,000 mg/L raw wastewater has the following characteristics: w=12 MGD Os=220 mg/L pended solids (SS) = 250 mg/L amary clanifier is provided that removes 25% of the BODs an 60% of the s primary sludge solids content is 4% solids and the specific gravity is 1.C A. 1,500 B. 60,000 C. 600 D.4,500

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Question

An aeration basin for an activated sludge facility has the following characteristics
Length = 90 ft
Width = 30 ft
Liquid depth = 12 ft
MLSS=4,000 mg/L
The raw wastewater has the following characteristics:
Flow = 12 MGD
BOD, = 220 mg/L
Suspended solids (SS) = 250 mg/L
A primary clarifier is ovided that removes 25% of the BOD, an 60% of the suspended solids The return activated-sludge flow rate is 0.8 MGD
If the primary sludge solids content is 4% solids and the specific gravity is 1.0, the primary sludge volume (ft³/day) is most nearly
OA. 1,500
OB. 60,000
O C.600
O D.4,500

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