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Raw primary sludge at a solids concentraion of 4% is mixed with waste activated sludge at a solids concentration of .5%. The flows are 20 and 24 gal/min respectively. What is the resulting solids concentration? This mixture is next thickened to a solids concentration of 8% solids. What are the quantities (in gal/min) of the thickened sludge and thickener overflow (water) produced? Assume perfect solids capture in the thickener.
1.for the pinned frame below subjected to a 500 kn lateral force what are the internal forces in each member? 2.for a
For a mixed liquor volatile suspended solids (MLVSS) of 1800 mg/L, what is the total return solids flow rate?
Determine the force required to drag a small barge (10 ft by 30 ft) in a shallow canal (3 inches deep) in order to maintain a velocity of 5 ft/sec. Assume that the fluid is behaving in a Newtonian fashion and the water temperature is 68 degree fah..
You have just received $10,000 witch which you can do anything. You have decided to invest the money over a long period of time and then use it to make a down payment on a vacation home.
Determine the minimum necessary clearance height of the overpass and the resultant elevation of the bottom of the overpass over the PVI. (ignore the cross-sectional width of the overpass)
The fluid pressure in the screen of a piezometer in a saline aquifer is 7.688 x 10^5 N/m^2. The fluid density is 1055 kg/m^3 and the temperature is 14 degrees C. The elevation of the piezometer screen is 45.9 m above sea level.
If the final consolidation settlement is expected to be 1.0m, how much settlement has occurred when the time factor is 0.2 andwhen it is 0.7?
Find the expanded depth of the bed after the backwash when initial depth of the bed is 3 ft using given conditions. m = 0.01g/cm/sec, T = 25oC, rs = 2.65, r=1, washrate = 1.5 cm/sec, ks2 = 196.
An electrostatic precipitator for a coal-fired power plant has an overall particulate recovery of 95%. The company engineer decides that this is too good, that it is not necessary to be this efficient
The initial conditions of the helium are 7 ft^3, 80 psia, and 100 F. The helium expands reversibly according to process PV^1.5=C until the pressure reaches 15 pisa.
What diameter of a circular conduit flowing full would be required to carry the same quantity of flow as in a concrete trapezoidal channel of 20 ft width and 45 degrees side slopes, running at a depth of 3.0 ft
Two men A and B, each having a weight of 160lb stand on a200lb cart. Each runs with a speed of 3ft/s measured relativeto the cart. Determine the final speed of the cart if:
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