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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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Consider high pressure steam at 400 degrees C and v =0.01567 m^3/kg. Obtain estimates of the pressure using
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A firm is considering moving its manufacturing plant from Chicago to a new location. The industrial engineering department was asked to identify the various alternatives together with the costs to relocate the plant, and the benefits.
Natural gas is stored in very large vessels consisting of a floating tank and a liquid seal. The pressure in the tank is constant because the weight of the floating tank is constant. In the morning, the temperature of the natural gas is 300 K.
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