Consider the design of
a wastewater treatment plant (wwtp) for a community with average
daily
and peak hourly wastewater design flows of qav m3/day and qpeak
m3/day. the raw sewage has an
average of bodav mg/l bod5 and ssav mg/l of suspended solids.

(e) determine the return (recycle) flow rate in cubic meters per
day (qr).
(f) determine the volumetric bod loading to the aeration tank in kg
bod m-3 d-1.
(g) determine the food to microorganism ratio (f/m) for the
aeration tank in kg bod d-1 / kg mlvss.
(h) determine the design hydraulic detention time (hrt) in
hours.