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A wastewater treatment plant has an average flow rate of 25 MGD, and a flow-proportioned average BOD concentration 120 mg/L. How many pounds per day is this? A person produces about 0.17 pounds of BOD per day in fecal waste. What is the population equivalent of the wastewater flow? Based on this calculated population, what would the average daily wastewater production be per person?
What uniform annual series of cash flows over a 12-year period is equivalent to an investment of $5,000 at t= 0, followed by receipts of $600 per year for 11 years and a final receipt of $1,600 at t= 12 of the investor's time value of money is 6% ..
Consider the design of wastewater treatment plant for a community wiyh average daily and peak hourly wastewater design flows of 2.0 mgd. The raw sewage has an average of 230 mg/l BOD5 and 260 mg/l of suspended solids.
Need to design a cantilever retaining wall 8m high, saturated unit weight is 16kn/m 3 , surcharge is 7kn/m 2 , load above wall supported on wall stem
Design an algorithm that lists all possible rearrangements of the symbols in a string of five distinct characters. (in pseudocode)
The two shafts in a speed-reducer unit are subjected to couples of magnitude M1 = 18 N · m and M2 = 7.5 N · m, respectively.
Calculate the equilibrium concentration of dissolved oxygen in 15oC water at 1 atm, and again at 2000 m elevation.
A stainless steel tube with an outside diameter of 65 mm and a wall thickness of 5 mm is used as a compression member. If the axial normal stress in the member must be limited to 180 MPa, determine the maximum load P that the member can support.
A sewage treatment works (STW) with 4 single-stage trickling filters has become organically overloaded due to the discharge of a biodegradable industrial effluent to the STW. This is causing effluent to pond on the surface of the filters.
A distance of 200 ft must be taped in a manner to ensure a standard deviation smaller than ± 0.03 ft. What must be the standard deviation per 100 ft tape length to achieve the desired precision?
Which software do we use to calculate force and moment, and draw shear and moment diagram? I really need this software to design my structural project. Please helps me... thank you so much
The beams support one-way slabs, 6 inches thick that span 20 feet center to center. Assume that the beams are 16 inches wide and 24 inches deep. Determine the dead load in pounds per linear foot for the beams, from the concrete structure alone.
Calculate the equilibrium concentration of dissolved oxygen in 15ºC water at 1atm and again at 2,000m elevation.
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