1. Sanitary Engineering Lecture 15 Quiz-Exercise

2. Quiz-Exercise
In the municipality of Honolulu find the storm water by hydrologic design for the collection system according the Rational Method:
Given are the following terms:
Runoff coefficient = 0.42
Drainage area = donum
Intensity of rain fall = 26 mm/d
Assume:
50% of the rain water are losses, just 30% of them will be
collected as mixed water with the waste water.
Identify the Impacts of rain water on the existed WWTP? Explain your Results shortly?

3. Data collecting (actual)
Q waste water = m3/d
CBOD5 = 200 mg/l, CPO4 = 15mg/l, h =90%
CBOD5 = 50 mg/l, CPO4 = 8mg/l
1m3 water = 1m3 waste water 0.25$
1m2 of reactor Area 22 $
tone TS in the agriculture $
1kg Fecl3 (40%) $
1KWh $
F / M = 0.05 kg BOD5/kg TS.d
TS = 4 g/L
Primary SS removal = 60 (%)
Surface overflow rate = 40 m³/d/m²
qsv = 600 L/(m²/h)
ISV = 80 ml/g