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An agricultural waste lagoon has a total volume of 500 m^3 and has an initial dissolved oxygen (DO) level at the saturation for 20 °C. This waste lagoon receives a discharge of 1,750 L of runoff containing an ammonium loading of 500 mg as N per liter. Assuming nitrification occurs in the waste lagoon, what is the final dissolved oxygen concentration (in mg/L) in the waste lagoon after all of the ammonium (NH4+) is converted to nitrate? Recall from lecture that 4.57 mg of O2 is need per mg of ammonium (as N) oxidized during nitirification. After all of the ammonium is converted to nitrate, would the waste lagoon be considered hypoxic?
Draw the shear diagram for the shaft. The bearings at and exert only vertical reactions on the shaft
a power plant burns 150,000 tonnes (1 tonne = 1,000 kg) of coal each year. The coal has 2.5% sulfur content, and the air pollution control equipment removals approximately 94% of sulfur. Assume 10% of the sulfur content ends up in the ash.
AGNO 3 is added to a solution containing 0.001 mol Cl - amd 0.001 mol Br- per liter.What are the concentrations of Cl - and Br- remaining when AgCl just begins to precipitate?
Water flows uniformly at a depth of y1 = 40 cm in the rectangular troweled concrete channel shown, which is 10 m wide and has a bed slope of So = 0.040 . What is the velocity in the channel before the hydraulic jump
a) What flow rate (m 3/s) does the filter handle during production? b) What volume of water is needed for backwashing plus rising the filter in each filter cycle?
determine the maximum wind load that the cavity wall , bothe wythes are fully grouted but unreinforced ,and type S mortar portland cement is used . prism strength is equal to 2666psi for the concrete block wythe and 5333 psi for the brick wythe.
Suppose that all the dislocations in 1000 mm^3 (1 cm^3) were somehow removed and linked together end-to-end. How far (in miles) would this chain extend
A steel rod having a cross sectional area of 1/2in^2 and length of 600ft is suspended vertically. It supports a load of 5000 pounds at the lower end. If steel weighs 490 lb/ft^3 and E=30,000,000 psi, find the total elongation of the rod
Determine the required pumping rate. the aquifer has T= 1600 m2/day and the wells each have radius of influence of 600m.
Given this 10-yr record of annual precipitation in inches (28,21,33,26,29,27,19,28,18,22), plot a rough precipitation frequency curve. Tabulate the data to be plotted and show the method of computation. (note: the frequency in percent of years is ..
Measurements of water-balance components have been made for a one-year period on a lake with an area of 4.4 km2 with the following results: P = 350 mm, Qsi = 2.33 x 107 m3, Qgi = 2.2 x 105 m3, Qgo = 0.6 x 105 m3, and Qso = .10 x 107 m3.
A paved parking lot section has a uniform slope over a length of 100 m (in the flow direction) from the point of a drainage area divide to the inlet grate, which extends across the lot width of 30 m.
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