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Given:
Average flow rate = .0022 m^3 /s (190 m^3 /d) Influent Substrate concentration = 250 mg/L as COD (all essentially soluble) Mean cell residence time is to be 5 days Volume of mix tank = 25 m^3 the reactors kenetic constants are: u(max)= 2.4 d^-1 , Ks = 75 mg/L as COD, Y=.4 VSS/g COD, k(d)= .096 d^-1 (K=u(max)/Y)
a) What is the hydraulic residence time of the reactor?
b) What is the COD removal efficiency of this system?
c) What is the biomass concentration in the aeration Tank?
d) What is the F/M ratio?
e) What is the sludge production rate? Please show work
If it is known that the value of the stress exponent, n, for this alloy is 8, compute the steady-stare creep rate at 1300 K and a stress level of 90 MPa.
The uniform load has a mass of 450 and is lifted using a uniform 35- strongback beam and four ropes. Determine the Tension in the ropes Determine the force that must be applied at A.
If you deposit $1000 per month into an investment account that pays interest at a rate of 6% per year, compounded quarterly, how much will be in the account at the end of 5 years
Due to a leak in Pump Station 1,the Alaska pipeline is shut down briefly.The pipe line is half full.Assume the pipe is welded horizontally at its midpoint.What is the tensile force on the weld per foot? Assume Ø=40”and ?oil=53.55lb/ft3.
you are going to select window type and have two alternatives aluminium and wood. the window size is withhigh 1418
The frame shown is used to support high-tension wires. If W = 200 lb, b = 3 ft, a = 30°, what is the axial force in member HJ?
a soil has a moist buldk density of 1950 kg/m^3, a dry bulk density of 1750 kg/m^3, and a soilds mass density of 2650 kg/m^3. determine the saturation ratio
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An object of density P_a, volume V_a, and weight W_a is thrown from a rowboat floating on the surface of a small pond and sinks to the bottom.
What is the maximum column load in kips that could be placed on a 4-ft square temporary footing on a sand for which the standard resistance is about N=15 and the water table is at the surface A factor of safety of 2 is to be maintained against bea..
An open system Brayton cycle has a heat input of 500 kW. The pressure ratio of is 15 and the mass flow rate of air through the engine is 1 kg/s. Right before compression the temperature of the air is 273K and the pressure is 70 kPa.
The length of the wire is 7,000 m, the weight density of the steel is 78 kN/m3 and its ultimate stress is 620 MPa. Find the safety factor of the wire against breaking from its own weight.
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