A sewage treatment plant employing activated sludge process is operated under the following conditions:
Wastewater flow rate into the aeration tank = 0.150 m3/s
Soluble BOD5 in the influent = 84 mg/L
Soluble BOD5 in the effluent = 11 mg/L
Mean cell residence time = 5 days
Total yield co-efficient = 0.5 kg of MLVSS/kg BOD5 removed
Decay rate of microorganism = 0.050/day
The net waste activated sludge produced in the plant is ______ kg of VSS/day (rounded off to two decimal places).