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A 100-mL water sample is collected from a municipal wastewater treatment plant's biological aeration treatment reactor. The sample is placed in a drying dish (weight = 0.5000 g before the sample is added), and then placed in an oven at 104°C until all the moisture is evaporated. The weight of the dried dish is recorded as 0.5625 g. A similar 100-mL sample is filtered and the 100-mL liquid sample that passes through the filter is collected and placed in another drying dish (weight of dish before sample is added is also 0.5000 g). This sample is dried at 104°C and the dried dish weight is re-corded as 0.5325 g. What is the concentration (in mg/L) of
(a) total solids?
(b) total suspended solids?
(c) total dissolved solids? and
(d) volatile suspended solids? (Assume that in the aeration basin, VSS = 0.7sTSS.)
During a 108 minute long storm, the precipitation rate over a 100 acre area is 1.65 in/hr. The phi index is 0.42 in/hr. The average outflow from the area is 92 cfs during the storm. What is the value of combined detention and interception storages ..
that acts at a 45 degree angle from the side of the footing (it acts diagonally across the top of the footing) determine whether the resultant force acts within the kern. If it does, then compute the bearing pressure at each corner of the footing.
A sample of soil was compacted into a 945 ml.laboratory mold. The mass of the compacted soil was 1850 grams and its moisture content was 13.1%. Specific gravity of solids is 2.70, Compute the moist unit weight, dry unit weight, and degree of satu..
An 18-inch storm drain (n=0.013 | s=0.025) is designed to discharge 9.75 CFS. The design guidelines state that the velocity can not exceed 10 ft/s in the pipeline. What is the velocity in the pipeline?
Boxes are placed on a slope at uniform intervals of time trelease and slide down the slope with uniform acceleration. Knowing that as a box B is released, the preceding box A has slid 6 meters down the slope and that 1 second later they are 10 meters..
Calculate the precentage of carbon hydrogen and oxygen in ethanoic acid.
Determine the required pumping rate. the aquifer has T= 1600 m2/day and the wells each have radius of influence of 600m.
If the rate of travel of the ram u is 0.5 fps, find the frictional resistance, F when 6 ft of the ram is engaged in the cylinder.
A 10-year hurricane is subjected to occur at a given region. Determine the probability that:
Estimate the cp and cv of the nitrogen at this state, using enthalpy and internal energy data from Table A-18, and compare them to the values listed in Table A-2b.
Three reservoirs are connected by three pipes with hA = 100 f t, hB = 20 f t, hC = 0 f t, l1 = 1000 f t, l2 = 500 f t, l3 = 400 f t and D1 = D2 = D3 = 1 f t. Determine flow rate into or out of each reservoir if friction in each pipe is 0.02.
Why would an orange farmer worry about his crops on a cloudless, dead-claim night with lows predicted to be 35 F but sleep easy if it's overcast and windy? Explain your answer form the perspective of transport phenomena to receive full credit. (Th..
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