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    "Engy-5140: Chemical and Nuclear Waste Processing Fall 2019 UMass Lowell; Prof. V. F. de Almeida **28Oct2019**\n",
    "\n",
    "# Homework 03 28Oct2019"
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   "source": [
    "### Name: `your name`"
   ]
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    "### <span style=\"color:red\">Guidance:</span>\n",
    " +  <span style=\"color:red\"> \n",
    "    Individual work. Be clear and complete in your answers.\n",
    "    </span>\n",
    " +  <span style=\"color:red\"> \n",
    "    Save your work frequently to a file locally to your computer.\n",
    "    </span>\n",
    " +  <span style=\"color:red\">\n",
    "    During your work and before submitting the final version do: `Kernel` -> `Restart & Run All`, to verify your notebook runs correctly.\n",
    "    </span>\n",
    " +  <span style=\"color:red\">\n",
    "    Save your file again.\n",
    "    </span>"
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    "---\n",
    "### Table of Contents\n",
    "* [Problem Statement](#statement)\n",
    "* [Problem 1 (50 pts)](#p1)\n",
    "* [Problem 2 (50 pts)](#p2)\n",
    "---"
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    "### <span style=\"color:blue\"> Problem Statement </span> <a id=\"statement\"></a>\n",
    "\n",
    "#### <span style=\"color:blue\"> Ground water at volumetric flow rate of 1,500 gpm, containing three volatile organic compounds (VOCs), is to be treated by countercurrent air stripping in a trayed column to produce drinking water that meets EPA standards (see data below). </span>\n",
    "\n",
    "\n",
    "| Component | K-value | Groundwater (ppm) | EPA drinking water tolerance (ppm) | ($\\mu$g/L) |\n",
    "| --------- | ------- | ----------- | ---------------------------- |----|\n",
    "| 1,2-Dichloroethane (DCA) | 60 | 85 | 0.005 | 5 |\n",
    "| Trichloroethylene (TCE) | 650 | 120 | 0.005 |  5 |\n",
    "| 1,1,1-Trichloroethane (TCA) | 275 | 145 | 0.200 | 200 |\n",
    "\n",
    "ppm is parts per million by mass (assume 1 ppm in water = 1 mg/L).\n",
    "\n",
    "#### <span style=\"color:blue\"> Using the network modeling approach covered in this course, provide answers to the problems below (based on Seader, Henly, and Roper textbook Separation Process Principles Chap. 6, 2016) . </span>"
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   "source": [
    "### <span style=\"color:blue\"> Problem 1 (50 pts) </span> <a id=\"p1\"></a>"
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    "1. <span style=\"color:blue\"> Compute the minimum air flow rate in scfm (60$^\\circ$F, 1 atm). </span>\n",
    "2. <span style=\"color:blue\"> Compute the number of equilibrium stages (or nodes) if the air flow rate is twice the minimum required and the tower operates at 25$^\\circ$C and 1 atm.</span>\n",
    "3. <span style=\"color:blue\"> Compute the composition of each VOC in ppm (parts per million) in the resulting drinking water.</span>\n",
    "4. <span style=\"color:blue\"> Compare the K-values provided against tabulated values of the Henry's constant in the literature (see the Harzardous Waste reference book).</span>\n",
    "\n",
    "| Component | A | B | H [atm m$^3$/mol]; T(K) |\n",
    "| --------- | ------- | ---------------------------- |-----|\n",
    "| 1,2-Dichloroethane (DCA) | -4.02 10$^3$ | 6.94 | $\\ln H = \\frac{A}{T} + B$ |\n",
    "| Trichloroethylene (TCE) | 1.14 10 | 4.78 10$^3$  | $H=\\exp(A - \\frac{B}{T})$ |\n",
    "| 1,1,1-Trichloroethane (TCA) | 9.78 | 4.13 10$^3$  | $H=\\exp(A - \\frac{B}{T})$ |"
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   "source": [
    "Answers:"
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   "source": [
    "### <span style=\"color:blue\"> Problem 2 (50 pts) </span> <a id=\"p2\"></a>"
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   "source": [
    "1. <span style=\"color:blue\"> Design a trayed tower for the same flow rates used in Problem 1. </span>\n",
    "\n",
    "2. <span style=\"color:blue\"> What is the efficiency of your tower? </span>\n",
    "\n",
    "3. <span style=\"color:blue\"> Verify whether the concentratiosn of the VOCs in the water do meet the current EPA standards; show your source of information.</span>\n",
    "4. <span style=\"color:blue\"> Discuss the toxicity of the VOCs according to your sources. </span>\n",
    "5. <span style=\"color:blue\"> Would you consume the water from this water treatment you designed? </span>"
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   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "Answers:"
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