A completely mixed activated sludge process is operated without a clarifier and solids recycle. The influent soluble COD concentration is 200 mg/L and the flow is 1000 m3/day. The effluent soluble COD is 20 mg/L and the effluent biomass VSS concentration is 40 mg/L.
a) If an aerobic treatment is employed, what is the oxygen consumption rate in kg/day? Assume the net aerobic biomass yield is 0.4 g VSS/g COD.
b) If an anaerobic treatment is used, what is the methane production rate in m3/day? Assume the net anaerobic biomass yield is 0.03 g VSS/g COD, and 1 mole of methane has a volume of 25L.
c) The anaerobic process needs methanogens to produce methane. Please describe the two types of methanogens with respect you their electron donor, acceptor and energy
source. Which methanogen will produce CO2?
A completely mixed activated sludge process is operated without a clarifier and solids recycle. The influent soluble COD concentration is 200 mg/L and the flow is 1000 m3/day. The effluent soluble COD is 20 mg/L and the effluent biomass VSS concentration is 40 mg/L.
a) If an aerobic treatment is employed, what is the oxygen consumption rate in kg/day? Assume the net aerobic biomass yield is 0.4 g VSS/g COD.
b) If an anaerobic treatment is used, what is the methane production rate in m3/day? Assume the net anaerobic biomass yield is 0.03 g VSS/g COD, and 1 mole of methane has a volume of 25L.
c) The anaerobic process needs methanogens to produce methane. Please describe the two types of methanogens with respect you their electron donor, acceptor and energy
source. Which methanogen will produce CO2?
