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Updated Problem Set 4
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Please see minor comments below.
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| "# Example of Mass Balance Problem in Wastewater Treatment Units\n", | |||
| "Prepared by Annabelle Li (ali7@nd.edu) and Audrey Hansrisuk (ahansris@nd.edu)\n", | |||
| "\n", | |||
| "Edited by Pratham Singh (psingh4@nd.edu)\n", | |||
| "\n", | |||
| "**Reference:** Chapter 4 in *Elementary Principles of Chemical Processes*, 4th ed., Felder, R.M.; Rousseau, R.W.; Bullard, L.G. (2015), **Question 4.44**\n", | |||
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Please remove the bold from the question number in the reference
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| "# Example of Mass Balance Problem in Wastewater Treatment Units\n", | |||
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Mass Balance Analysis for Wastewater Treatment
| "plt.show()\n", | ||
| "# Create a publication-quality plot with reduced size\n", | ||
| "plt.figure(figsize=(4, 3), dpi=200) # Set figure size and DPI for a smaller plot\n", | ||
| "plt.plot(m1_values, x6_values, 'bo-', markersize=6, label='x6_Cr') # Use blue circles with a solid line\n", |
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Please use LaTeX here,
| " chromium_cost: Total cost of chromium in the waste stream (USD)\n", | ||
| " \"\"\"\n", | ||
| " # BEGIN SOLUTION\n", | ||
| " if m1 >= 4500:\n", |
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Need comments to explain this logic. This looks like a bound, but add comments so the reader does not need to guess.
| { | ||
| "cell_type": "markdown", | ||
| "source": [ | ||
| "Assume the value of chromium per kg is $9. Estimate the cost of chromium for different flow rate and the print the cost. Also plot the varying inlet flow vs chromium value in the waste stream." |
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Please provide a reference for this assumption
| "plt.figure(figsize=(4, 3), dpi=200)\n", | ||
| "\n", | ||
| "# Plot the data with a solid red line and circular markers\n", | ||
| "plt.plot(m1_values, chromium_costs, 'r-o', markersize=6, label=\"Chromium Cost\")\n", |
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This does not need a legend because there is one line and the legend label is redundant with the y-axis label.
| { | ||
| "cell_type": "markdown", | ||
| "source": [ | ||
| "Discussion: Is it economically and environmentally worthwhile to recover chromium in the circular economy, given the associated cost of recovery?\n", |
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Discussion: to be consistent with the rest of the notebook
| "source": [ | ||
| "#6. Economic Analysis of Chromium\n", | ||
| "\n", | ||
| "Develop a function ``econ_cr`` to evaluate the cost of the chromium that is going to waste stream when the inlet flow is above 4500 kg/h.\n" |
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Should this be the value of the Cr lost in the waste stream? Does the $9/kg represent the cost of disposal? Or is it the market value if the Cr could be capture, purified, and sold?
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