One of the vineyards in the Village of Skaneateles recently installed a PFR-type treatment system to...

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One of the vineyards in the Village of Skaneateles recently installed a PFR-type treatment system to remove fertilizers from stormwater runoff. Following the original design concept, the fraction of fertilizers (C₁/C) remaining in the PFR effluent was expected to be 0.02; however, the measured C₁/C value was 0.06 under typical treatment conditions. To achieve the treatment objective (i.e., C₂/C=0.02), the vineyard has decided to install an additional CMFR-type treatment system immediately downstream of the PFR (refer to the system schematic below). Note that the hydraulic residence time of PFR is 30 min. Given the above: (1) Determine the hydraulic residence time of the CMFR required for the integrated PFR-CMFR system to meet the treatment objective of C₂/C =0.02, assuming that the first-order reaction rate constant of fertilizers in the CMFR is identical to that in the PFR, and that both treatment units can be approximated as ideal reactors operating under steady-state conditions. (2) If the integrated PFR-CMFR system is designed to treat stormwater runoff at a steady flow rate of 0.1 m³/s, what would be the required reactor volumes for the PFR and CMFR, respectively? Influent Co PFR C₁ CMFR C₂ One of the vineyards in the Village of Skaneateles recently installed a PFR-type treatment system to remove fertilizers from stormwater runoff. Following the original design concept, the fraction of fertilizers (C₁/C) remaining in the PFR effluent was expected to be 0.02; however, the measured C₁/C value was 0.06 under typical treatment conditions. To achieve the treatment objective (i.e., C₂/C=0.02), the vineyard has decided to install an additional CMFR-type treatment system immediately downstream of the PFR (refer to the system schematic below). Note that the hydraulic residence time of PFR is 30 min. Given the above: (1) Determine the hydraulic residence time of the CMFR required for the integrated PFR-CMFR system to meet the treatment objective of C₂/C =0.02, assuming that the first-order reaction rate constant of fertilizers in the CMFR is identical to that in the PFR, and that both treatment units can be approximated as ideal reactors operating under steady-state conditions. (2) If the integrated PFR-CMFR system is designed to treat stormwater runoff at a steady flow rate of 0.1 m³/s, what would be the required reactor volumes for the PFR and CMFR, respectively? Influent Co PFR C₁ CMFR C₂

Answer rating: 100% (QA)

Part 1 The hydraulic residence time HRT of the CMFR required for the integrated PFRCMFR system to meet the treatment objective of C2C0 002 is given by the following equation HRTCMFR tau k lnC2C1 where ... View the full answer