Engineering, 10.12.2019 21:31 milkshakegrande101
Awastewater treatment plant uses an activated sludge process for secondary treatment of 0.300 m3 /s of primary effluent. the mixed liquor has a biomass concentration of 2,100 mg vss/l, and the ras biomass concentration is 10,000 mg vss/l. the substrate concentration in the primary effluent (i. e., s0) is 220 mg bod5/l. the f/m ratio for the activated sludge tank is 0.52 mg bod5/(mg vss * d), and the cell residence time is 9.0 d.
a. what is the volume of the activated sludge tank?
b. what is the was flow rate?
Answers: 2
Another question on Engineering
Engineering, 03.07.2019 15:10
Ahouse has the following electrical appliance usage (1) single 40w lamp used for 4 hours per day (2) single 60w fan used for 12 hours per day (3) single 200w refrigerator that runs 24 hours per day with compressor run 12 hours and off 12 hours find the solar power inverter size in watt with correction factor of 1.25.
Answers: 1
Engineering, 04.07.2019 03:10
What precautions should you take to prevent injuries when dealing with heavy loads?
Answers: 1
Engineering, 04.07.2019 18:10
Adouble-strand no. 60 roller chain is used to transmit power between a 13-tooth driving sprocket rotating at 300 rev/min and a 52-tooth driven sprocket. a) what is the allowable horsepower of this drive? b) estimate the center-to-center distance if the chain length is 82 pitches. c) estimate the torque and bending force on the driving shaft by the chain if the actual horsepower transmitted is 30 percent less than the corrected (allowable) power.
Answers: 3
Engineering, 04.07.2019 18:10
Which of the following ziegler nichols tuning methods the response of the controller to a step input should exhibit an s-shaped curve? a)-open loop mode b)-closed loop mode c)-both modes (open & closed) d)-none of the modes (open & closed)
Answers: 3
You know the right answer?
Awastewater treatment plant uses an activated sludge process for secondary treatment of 0.300 m3 /s...
Questions
Social Studies, 18.01.2020 02:31
