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1. An activated sludge plant is to be designed for a population of 4000 persons. The influent flow is 380 Lpcd and the influent BOD5 is 200 mg/L. Pertinent data are: Primary clarifier removes 33% of the influent BOD5, and the state regulatory agency allows a volumetric loading of 0.48 kg BOD5 /(m3.day). Determine the reactor basin volume.
2.An airplane approaches a stationary aircraft carrier at a speed of 300ft/s. The deceleration of the plane on the carrier is proportional to the speed a=-0.5v. Find the minimum length of runway required for the landing . Find the position on the runway where the speed is 50ft/s and the time it takes for the speed to reach 50ft/s
A two-bed carbon adsorption system is to be designed to handle 8000 acfm of air containing 700 ppm of hexane. Laboratory studies indicate that carbon can adsorb 8lb hexane per 100 lb carbon under the conditions
The point of intersection of the tangents is located at station (948+67.32). If the design speed of the highway is 60mi/h, determine both the point of tangent and the deflection angles to whole stations for laying out the curve. Select appropriate..
Compute the corrected horizontal distance for the following conditions: Temperature: 25oC Tape length: 29.990m Slope angle: -3o42’ Slope measurement: 211.416m
Consider a wind turbine at elevation of 7000 ft. The air pressure is taken to be 80kPa and the mean annual temperature is 2 degrees Celsius. What are the specific mechanical energy and power available
Calculate the change in length of a 30m measuring tape made of steel when its temperature changes by 84 F. The coefficient of thermal expansion for steel is x = 3.1 x 10^-6 per C
A city is subjected to occurrence of hurricane and tornado with the average probabilities of 0.3 and 0.2 per year, respectively. Assume occurrence of these events is statistically independent.
The floating platform is supported at each corner by a hollow sealed cylinder 1 m in diameter. The platform itself weights 30kN is air, and each cylinder weighs 1.0kN/meter of length.
A barometer filed with non-toxic glycerin is used to measure standard sea level atmospheric pressure. neglecting the effect vapor pressure and surface tension. calculate the atmospheric pressure head.
A flowrate of 3.5 ft^3/s is to be maintained in a horizontal aluminum pipe ( E = 5 * 10 ^-6 ft). The inlet and outlet pressures are 65 psi and 30 psi, respectively, and the pipe length is 500ft. Determine the diameter of the pipe.
1nbsp surveying iimagnetic compass the most common type of compass is the magnetic compass which is used to determine
determine the force in member AC, FH, and FG and indicate if the member is in tension or compression. List all zero force members.
What are alternative treatment options for the removal of EDCs in tertiary treatment? Be sure to justify any alternative treatment method you propose.
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