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The 500- bed Lotta Hart Hospital has a small activated sludge plant to treat its wastewater. The average daily hospital discharge is 1200 L/day per bed, and the average soluble BOD5 after primary settling is 500 mg/L. the aeration tank has effective liquid dimensions of 10.0 m wide x 10.0 m long x 4.5 m deep. The plant operating parameters are as follows: MLVSS = 2000 mg/L, MLSS = 1.2 x MLVSS, and return sludge concentration = 12,000 mg/L (VSS). Determine:
a. Aeration Period in hrs
b. F/M ratio
Determine the mass and specific volume of argon gas in a vessel at 150 kPa and 20°C. The vessel is spherical, with radius 5 m.^5
A turbine located 225 m below the water surface at intake, carries a flow of 3.5 m^3/s. The head loss in the pipeline leading to it is 10 m. Find the power (kW) delivered by the turbine if its efficiency is 92%.
The first pipe of 0.4-m diameter is 500 m long, the second pipe 600 m long, size 0.3 m, and the last pipe is 500 m long of diameter 0.2 m. If the elevation difference between two reservoirs is 30 m, calculate equivalent pipe size and flow in the p..
If it absorbs 100 Joules each cycle from the hot reservoir, how much work does it do. How much heat is given off in each cycle If each cycle takes 0.5 seconds, find the power output of the engine.
Find the maximum bending stresses(wood) and (steel), in the wood and steel, respectively, due to the uniform load if the modulus of elasticity are E (wood)=10 GPa for the wood and E (s)=210 GPa for the steel.
The mayor proposes financing the museum with a lump-sum tax of $24 and then opening the museum free to the public. How many times would each person visit? Calculate the benefit each person would get from the musuem, measured as consumer surplus minus..
What would be the Horizontal and vertical component from this acting force see diagram
One liter of a solution is made by adding 3grams of acetic acid (HAc) to distilled water. The molecular weightof acetic acid is 60.052. The acid dissociation constant for aceticacid
A steel bar of length 30 inches and circular cross section whose diameter varies linearly from 0.50 inches at one end to 0.75 inches at the other is subjected to an axial tensile force of 4.5 kip. Find the change in length of the bar.
For an elevated storage tank , if the minimum allowable pressure = 300 kPa, Height of pipe system at low-pressure service location = 6 m, and head loss from tank to service location: average daily conditions = 11 m
A system consists of liquid oxygen in equilibrium with oxygen vapor. How many phases are present The system undergoes a process during which some of the liquid is vaporized.
Assuming the ball experiences a downward acceleration of a = 10-9v2 when in the water, determine the velocity of the ball when it strikes the bottom of the lake.
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