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A chemical mixing basin is to be designed to blend chlorine and treated wastewater. The basin flow is 700 gallons per minute and the basin dimensions are 5 feet by 5 feet by 5 feet water depth. The basin will have a single mechanical blender that will transfer 100% of the mixing energy from the blades to the water. The wastewater temperature will vary from 35 F to 70 F. The selected mixing intensity in the basin shall be a minimum of 600 1/sec. What size motor (horsepower) is required for the mixer?
Answer the following:
What is hardness in water and why is it important?
Why is too much fluoride in drinking water a problem?
What is the drinking water standard for fluoride?
For benzene, what are the federal epa and State of NJ drinking water standards?
What is considered a safe level of benzene in drinking water?
If you were designing a drinking water treatment facility for the removal of benzene, what would you set as a treatment goal and why? How would you involve the client in the decision?
5 Kg of water at 1.2 MPa, 120oC is contained in a frictionless piston-cylinder device. The water is heated until its temperature reaches 250oC. a) a)Determine the work performed in kJ
The total gas volume that flowed through the dry gas meter was 2.785 cubic meters (at T = 60 deg F and P = 800 mm Hg). The mass of PM (particulate matter) was 1.50 g. Also, 72.0 g of H20 was collected in impingers.
Below a discharge from a wasterwater treament plant , an 8.6km stream has a reoxygenation constant of .4 d^-1, a velocity of .15m/s, a dissolved oxygen concentration of 6mg/L, and an ultimate demand of 25mg/L.
What is the Federal Express philosophy toward quality? What specific elements/actions has FedEx implemented in its quality improvement history?
A 4 X 8-ft solar collector has water circulating through it at the rate of 1.0 gallon per minute while exposed to sunlight with intensity 300 Btu/ft^2-hr.
a spherical balloon inflated sos that the volume is increasing at the rate of cubic meter/min. At what rate is the diameter increasing when the diameter is 12 m?
During an experiment, the depth of a water flow in a flume is measured five times by using a ruler with 1/16-in division. The results from these measurements are 4.88 in, 5.06 in, 5.03 in, 5.13 in, 4.94 in. What is the instrumental error and what ..
Suppose a watershed in Athens, Georgia has 25 acres pasture (CN=70) and 50 acres wooded (CN=55). Determine the excess rainfall (in inches) and runoff volume (cubic feet) assuming the design rainfall is 25-year, 24-hour.
explain how mechanical strength, melting temperature , and thermal exapntion are related at the atomic level. specifically, how do they relate to each other and the bonding energy between the atoms.
A simple curve has a central angle of 42degreess. A point Y is located 24m from the vertex and has a perpendicular distance of 3.00m from the back tangent.
A hydroelectricity plant is supplied from a resevoir via a pipeline 2km long and 2.5m in diameter. The pipeline terminates at the downstream end at in a control valve. Determine the minimum surge tank size if the max allowable height
Modeling the skydiver as a particle and assuming that the skydiver follows a perfectly vertical trajectory, determine the average force exerted by the parachute from the moment of deployment until landing.
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