03-29 - Welcome Back End of semester syllabus Lecture...

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Welcome Back! • End of semester syllabus • Lecture • Prelim 1
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CEE 3510 Environmental Quality Engineering End of Semester Syllubus Spring 2010 Lecture HW Monday 29-Mar AFR Reactors Wednesday 31-Mar AFR Reactors Friday 2-Apr Evaluation of Dispersion Coefficients Monday 5-Apr Evaluation of Dispersion Coefficients Wednesday 7-Apr Contaminant Transport in Groundwater Quiz 4 Friday 9-Apr Contaminant Transport in Groundwater PS 6 due Monday 12-Apr Contaminant Transport in Groundwater Wednesday 14-Apr Wastewater Treatment Friday 16-Apr Biological Secondary Treatment PS 7 due Monday 19-Apr Biological Secondary Treatment Wednesday 21-Apr Biological Secondary Treatment Thursday 22-Apr PRELIM 2 7:00 pm Kimball Hall B11 Friday 23-Apr Biological Secondary Treatment Monday 26-Apr Reactor Types and Modifications Wednesday 28-Apr Sedimentation Friday 30-Apr Sedimentation PS 8 due Monday 3-May Sludge Management- anaerobic digestion Wednesday 5-May Sludge Management- anaerobic digestion Friday 7-May SLOPE DAY review session PS 9 due Wednesday 12-May FINAL EXAM 7:00 PM Mallot Hall 251
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Note: For a CSTR fluid elements have a distribution of residence times since the reactor is completely mixed. Some fluid elements of the input flow leave the reactor immediately while others stay around for infinity. In general θ may be defined as a concentration weighted average time (for a pulse input [see below]). V/Q for an ideal PFR = LA/uA = L/u 0 ) t ( dt tC 0 ) t ( dt C t C t ) j ( j n 1 j = t C ) j ( n 1 j = for discrete samples of effluent over time alternate symbol t θ = = θ =
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For a CSTR it may be shown that θ = V/Q as follows: For wash-out of a pulse of a conservative material and t (V /Q) i C C e - = 1 t Q/ V Qt ( ) V e - - - 0 0 tCdt Cdt θ = 2 0 0 0 0 1 i t /(V /Q) i t t /(V /Q) Q/ V i i C (Q/ V) tC e dt C e dt C e Q/ V - - - θ = = = θ V/Q 2 1 1 (Q/ V) Q/ V = =
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A brief comment on how to compute your residence time. Consider the summation: t C ) j ( n 1 j = This is just the area under the tracer response curve (i.e., the plot of C vs. t) (C C 2 C 1 2 3 4 5 6 Area = ( 29 3 4 3 4 t t 2 ) C C ( - + In the summation: t C t ) j ( n 1 j j = t j = (t 4 + t 3 )/2 C (j) = (C 4 + C 3 )/2 t (j) Time
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PFR and AFR Reactors: Development of Response Equations We'll begin with the most complex case and derive general equations. Later, we will make simplifying assumptions and apply the equations.
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This note was uploaded on 04/13/2010 for the course CEE 3510 taught by Professor Lion during the Spring '10 term at Cornell.

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03-29 - Welcome Back End of semester syllabus Lecture...

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