Env E 309 Fundamentals of Biological Treatment
Final Exam 2010
Out of 100 (20 points bonus)
An activated sludge plant treating refinery wastewaters receive 250 mg/L BOD u daily. Considering that
about 20 % of this organic load is from phenols, calculat
ENVE 309 FUNDAMENTALS OF BIOLOGICAL TREATMENT
2007 Fall Semester, Recitation VIII
1. Design an optimum activated sludge process of combined nitrifying type for a wastewater
flow of 20 MLD. Wastewater contains 300 mg/L BOD and 30 mg/L N. The pH remains
TERM PAPER SUBJECTS
Biological nitrogen removal from domestic wastewater
Biological phosphorus removal from domestic wastewater
Minimization of excess sludge production for biological wastewater treatment
Aerobic MBRs for domestic wastewater trea
1. The following experimental protocol was obtained with a laboratory scale chemostat of 2 L
volume. The influent strength was 650 mg/L as COD.
COD Biomass (mg/L)
CE 428 Water and Wastewater Design
Stoichiometry of Biological Nitrification
Two step oxidation of ammonia to nitrite and to nitrate
2 NH4+ + 3O2 = > 2NO2- + 4H+ + 2H2O
2 NO2- + O2 = >
Design an SBR to treat wastewater having influent flowrate of 2000 m3/d. 80 % of reactor volume is
decanted at each cycle and number of cycles per day is 2.
a) One-tank system: X, xE, VF, VT, Vo=?
b) Two-tank system : X, xE, VFn, VTn, Von, TF,
Q: Design a 2-tank SBR with 3 cycles per day for a wastewater flow rate of 0.1 MLD.
Take initial volume (V0) as 25 % of total, then you can adjust as required by observing sludge
The following design criteria are applicable:
Ts = 2 h (s
Design an anaerobic filter for a brewery wastewater of 1 MLD flow rate and having an
average COD of around 22000 mg/l. Take that design criteria is 10 kg COD/m3.d for such a
system which should contain around 30 g/l VSS. Also consider that effluent ste
WHAT CAN GIS DO?
Funtions of GIS can be classified accordinly, it provides management by means of linking
attribute data to spatial objects, to external databases, changing existing databases if needed,
updating database features, import and export data f