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You are designing a reactor that uses chlorine in a PFR of CMFR to destroy pathogens in water. A minimum contact time of 30 mins is required to reduce the pathogen concentration from 100 pathogens/L to below 1 pathogen/L through a first order decay process. You plan on treating water at a rate of 1,000 gal/min.
A) what is the first order decay constant?
B)What is the minimal size (in gallons) of the reactor required for a plug flow reactor?
C)What size (in gallons) of CMFR would be required to reach the same outlet concentration
D) Which reactor requires the least Volume? Briefly explain why the PFR and CMFR volumes are different for achieving the same degree of pathogen reduction.
E) If the desired chlorine residual in the treater water after it leaves the reactor is .20mg/L, and the chlorine demand used during treatment is.15mg/L, what must be the daily mass of chlorine added to the reactor in grams?
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For almost all new coal plants, Clean Air Act emission standards limit emissions of sulfur dioxide (SO2) to 260 grams per million kJ of heat input (fuel value). They also restrict particulate emissions to 13 g/106 kJ.
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A proton feels a force of 2.0 micro-Newtons in the negative x-direction when it is moving in the positive y direction with a speed of 2.0 x 107 meters per second.
a well is located in a confined aquifer. the transmissivity of the aquifer is 1200 m^2/d and the storativity is 0.0005. the flow rate is 4000 m^3/d. At a distance 75m from the well,
Determine the minimum force P to prevent a 30kg rod AB from sliding on a wall. The contact surface at B is smooth, whereas the coefficient of static friction between the rod and the wall at A is Us=0.2.
A jar test has shown that the optimum dose of ferric chlorideconsumes all of the alkalinity. If the amount of the ferricchloride that is in excess is 10 mg/l, how much lime(Ca(OH)2) in mg/l must be added to neutralize the acidformed.
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