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Effect of Equalization on BOD5 Mass Loading Analysis
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Effect of Equalization on BOD5 Mass Loading Analysis

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Questions and Answers

Which compound is not listed in Table 11-3?

  • PCB-1016 (correct)
  • Isophorone
  • Fluoranthene
  • Hexachlorocyclopentadiene

    • Which compound is an example of a nonconventional pollutant in Table 11-3?

  • PCB-1254 (correct)
  • Phenanthrene
  • Endrin
  • Aldrin

    • Which compound is structurally similar to Dieldrin in Table 11-3?

  • β-BHC
  • Endrin sulfate
  • Toxaphene (correct)
  • Heptachlor epoxide

    • Which compound is listed as α-BHC in Table 11-3?

    <p>Endosulfan</p> Signup and view all the answers

    Which compound has the term 'sulfate' in its name in Table 11-3?

    <p>Endosulfan sulfate</p> Signup and view all the answers

    Which compound is presented in Table 11-3 with a number '117'?

    <p>Heptachlor epoxide</p> Signup and view all the answers

    What is the main purpose of modeling the response of the receiving body in the context of obtaining a permit?

    <p>To evaluate if the discharge will adversely affect the receiving body</p> Signup and view all the answers

    What might be a reason for a permit to require lower concentrations than those specified in Table 11–6?

    <p>To protect the quality of the receiving water body</p> Signup and view all the answers

    In what situation does Michigan impose a limit of 1 mg · L−1 of phosphorus in permits for discharges to surface waters?

    <p>Only for discharges with low levels of nutrients</p> Signup and view all the answers

    Why are CBOD5 limits placed in NPDES permits for facilities that can contribute significant quantities of oxygen-consuming substances?

    <p>To reduce the oxygen demand from discharged substances</p> Signup and view all the answers

    What is typically the oxygen demand of concern from municipal discharges?

    <p>Nitrogenous oxygen demand from ammonia nitrogen</p> Signup and view all the answers

    Why might bacterial effluent limits be included in an NPDES permit?

    <p>To prevent bacterial contamination in receiving waters</p> Signup and view all the answers

    What is the average flow rate calculated in the given data?

    <p>0.05657 m3 · s−1</p> Signup and view all the answers

    At what time did the flow rate first exceed the average flow rate?

    <p>0900 h</p> Signup and view all the answers

    What is the BOD5 concentration at 0400 hours?

    <p>32 mg · L−1</p> Signup and view all the answers

    At what time does the BOD5 concentration peak in the given data?

    <p>2000 h</p> Signup and view all the answers

    How many hours after 0900 do we observe a drop in BOD5 concentration?

    <p>4 hours</p> Signup and view all the answers

    Which time period shows the highest mass loading of BOD5?

    <p>2000 - 2100</p> Signup and view all the answers

    What is the advantage of using corrugated plastic sheets and plastic rings in trickling filters?

    <p>They offer larger surface areas for slime growth</p> Signup and view all the answers

    How do synthetic media differ from rock media in trickling filters?

    <p>Synthetic media can reach greater depths than rock media</p> Signup and view all the answers

    How are trickling filters classified based on hydraulic load?

    <p>Based on the amount of wastewater applied per day per square meter of bulk filter surface area</p> Signup and view all the answers

    What is the organic loading expressed as in trickling filters?

    <p>Kilograms of BOD5 per day per cubic meter of bulk filter volume</p> Signup and view all the answers

    How do lighter materials like corrugated plastic sheets and plastic rings benefit trickling filters?

    <p>They enable taller trickling filters without structural issues</p> Signup and view all the answers

    In terms of void ratios and air flow, how do synthetic media compare with rock media?

    <p>Synthetic media provide greater void ratios for air flow</p> Signup and view all the answers

    What is the equation for the growth rate of bacterial cells in the log-growth phase?

    <p>rg = μX</p> Signup and view all the answers

    What does μ represent in the equation μm = μ(Ks + S) / S?

    <p>Maximum specific growth rate constant</p> Signup and view all the answers

    Which parameter is used to define the concentration of limiting food when μ = 0.5μm in the Monod equation?

    <p>Ks</p> Signup and view all the answers

    What is the main reason Monod developed a model equation for growth rate constant?

    <p>To account for enzyme reactions involving food compounds</p> Signup and view all the answers

    In a batch reactor, what does the rate expression for biomass increase look like?

    <p>(dX/dt) = μX</p> Signup and view all the answers

    How does the relationship between growth rate constant and limiting food concentration appear in Figure 11–6?

    <p>Hyperbolic function</p> Signup and view all the answers

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