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Consider again the proposed water treatment plant for a city of 100,000 people where the maximum daily water usage rate is 99 X 106 L/d. Determine (a) the number of kilograms of chlorine needed per day and (b) the capacity of the contact tank. You may assume that the chlorine demand is 1.0 mg/L and that the desired chlorine residual is 0.2 mg/L. Furthermore, you may assume that the minimum contact time should be 30 minutes.
(The contact time in water treatment plants is usually provided by a large storage chamber called a clear well or storage reservoir. The primary function of the clear well is to isolate the plant from the hourly fluctuation of municipal water demand, but it also serves the purpose of allowing sufficient time so that the concentration of free available chlorine will stabilize at the proper value before being pumped to users.)
The water pressure in the municipal pipeline is 450 kPa, the sum of the local loss coefficients in the building pipes is 11.0, and the flow to be delivered to the top floor at 25 L/s through a 150-mm diameter PVC pipe.
A crest vertical curve and a horizontal curve on the same highway have the same design speed. The equal-tangent vertical curve connects a +3% initial grade with a +1% final grade and has a PVC at 101+78 and a PVT at 106+72
determine the elastic elongation that would be expected for a 16-mm-diameter rod of the same material if the rod were 1.6 m long and subjected to a tension force of 3.3 kN.
A wastewater treatment plant must disinfect its effluent before discharging the wastewater to a near-by stream. The wastewater contains 4.5*105 fecal coliform colony-forming units (CFU) per liter.
Write out the steps for the aldol condensation reaction between the enolate anion of propanal with pentanal.
Find depth of water flow in Rectangular channel, Water is flowing in a rectangular channel whose width is 5m
A weight W somewhere between 1 to 10 tons is randomly placed along a beam of 10m long span. Let X denote the distance from the point of applicatoin of the load to the nearest support.
Determine the tension in the cable as the box moves between A and C and determine normal and tangential force components the road exerts on the car at this instant.
When Eurasia restaurant, serving Eurasian cuisine, first opened along Chicago's Michigan Avenue, its novelty brought many diners.
The pivot of each 120 kg seat on a Ferris wheel travels in a circle with a 10 m radius, and the Ferris wheelrotates witha rotational speed of 0.1 rad/sec. What is the interaction force between the ferris wheel framework and the seat H when angle Q..
A rig accelerates a load of 200000 lbf from zero to 60 ft/min in 5 seconds. compute the load shown on the hook load indicator.
In accordance with BCA, what are the assessment methods and how may they be used to determine that a building solution complies with the performance requirements
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