SolutionsHW#3 - SOLUTIONS HOMEWORK NO 3 CE 3400...

Info icon This preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
SOLUTIONS HOMEWORK NO. 3 CE 3400 – Introduction of Environmental Engineering Material Covered: Chapter 6 (REACTORS) in Vesilind et al., 2010 1. A CSTR is used to treat an industrial waste, using a reaction that destroys the pollutant according to first-order kinetics with k = 0.216 day -1 . The reactor volume is 500 m 3 , the volumetric flow rate of the single inlet and exit is 50 m 3 /day, and the inlet pollutant concentration is 100 mg/L. What is the concentration of the pollutant in the treated effluent? Find : C out Assumptions : steady state (Q in = Q out ), consumption of pollutant, perfect mixing, no concentration or temperature gradients in reactor, first-order reaction kinetics Volumetric Mass Balance: Q in = Q out so use Q without subscripts in equations dC dt V = QC in QC out + r 1 V r 2 V Assume steady state so: dC dt V = 0 because dC dt in reactor not changing w/ time 0 = QC in = QC out r 2 V Since r = kC , then 0 = QC in QC out kCV C o C = 1 + k V Q C = QC o Q + kV (Equation found on p.184 of textbook)
Image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern