Design Criteria

Removal of organic matters --- BOD₅;

Design period: 20 years;

Provide four aeration tanks and four settling tanks;

Sustained mass loading rate for the design of aeration tank: BOD₅ lb/day = Q_Ave �  BOD_5in � 1.15 (Because sustained factor = 1.15 from 30 days Ave. BOD_5in and 30 days Ave. BOD_5eff );

Design final settling tank based on limiting solid flux at peak flow rate;

Select rotary positive displacement blower and disc fuser in aeration system;

Sludge wastage from final settling tank.