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For a flow of 2 MGD, an influent BOD of 200 mg/l, a depth of 8 feet, and a desired effluent BOD concentration of 20 mg/l, determine the volume required for trickling filtration treatment as predicted for single-stage treatment by using NRC equations.
Water at 20ºC flows at a velocity of 2 m/s in a 200-mm diameter horizontal ductile-iron pipe. a) Estimate the friction factor in the pipe, and state whether the pipe is hydraulically smooth or rough
What would be the Horizontal and vertical component from this acting force see diagram
What is the vapor pressure of carbon dioxide in the bottle before it is opened (i.e., when it is at equilibrium) assuming no other ions are present besides those related to CO2 and water
a vertical curve on this highway connects +1% and +3% grade and is 420ft long. if a horizontal curve on highway is on a two-lane section with 12 ft lanes and has a central angle of 37 degrees and a superelevation of 6%, what is the length of the h..
A tow truck is searching a city street at 30 mi/h for illegally parked vehicles. It travels over an equal tangent vertical curve with an initial grade of +3.5% and final grade of -4.0%.
a car is traveling at sea level at 78 mi/h on a 4% upgrade before the driver sees a fallen tree in the roadway 150 feet away. the coefficient of road adhesion is 0.8. The car weighs 2700 lbs, has a drag coefficiant of 0.35, a frontal area of 18 ft..
Roof trusses such as the one shown are spaced 6 m apart in a long, rectangular building. During the winter, snow loads of up to 1 KN/m^2 (or 1 KPa) accumulate on the central portion of the roof. Find the force in each member for a truss not at the..
If the column is subjected to an axial compressive force of 800 kN, determine the required diameter of each reinforcing steel bar so that one-third of the load is carried by the steel and two-thirds by the concrete. Assume Esteel= 200 GPa and Econ..
the flow rate into the lake is 10 m3/s, the surface area of the lake is 1 x 107 m2, and the rate of evaporation from the lake is 6 cm/wk, how long ago did the dumping stop?
CE 3303 – Solids – MWF – Spring 2014 - Homework Set 23, – The pipe shaft of the auger, rotating at a constant angular velocity, is subject to the axial force and torque shown. Determine the stress state at points A & B and show on a stress element.
What is the reaction that occurs with hexanal and propanol (give both the hemiacetal and acetal products)?
Field tests have shown that the Horton equation best describes the composite roughness of the channel. Find the capacity of the main channel and the lateral extent of the floodplains for a 100-year flow of 1590m^3/s.
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