A reactor has an overall hydraulic residence time (7) of 45 min, based on the total...

 

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A reactor has an overall hydraulic residence time (7) of 45 min, based on the total volume of water in the reactor and the total flow through it. The reactor can be reasonably represented as three ideal reactors in parallel. One of the conceptual reactors, accounting for 10% of the tank volume, is "nearly dead" space; this portion of the tank is completely mixed and has a residence time of 67. Another portion of the tank is occupied by short-circuiting flow; 30% of the influent flow passes through this unmixed (plug flow) section, with a residence time of 0.17. The remaining flow passes through the rest of the reactor volume and is well mixed. (a) Draw a flowsheet to model the overall reactor, showing the volume, residence time, and fraction of the flow through each portion of the reactor. (b) Write the equation and draw a curve showing E(1) versust for the reactor. (c) What fraction of the water that enters the reactor stays there for a time t A reactor has an overall hydraulic residence time (7) of 45 min, based on the total volume of water in the reactor and the total flow through it. The reactor can be reasonably represented as three ideal reactors in parallel. One of the conceptual reactors, accounting for 10% of the tank volume, is "nearly dead" space; this portion of the tank is completely mixed and has a residence time of 67. Another portion of the tank is occupied by short-circuiting flow; 30% of the influent flow passes through this unmixed (plug flow) section, with a residence time of 0.17. The remaining flow passes through the rest of the reactor volume and is well mixed. (a) Draw a flowsheet to model the overall reactor, showing the volume, residence time, and fraction of the flow through each portion of the reactor. (b) Write the equation and draw a curve showing E(1) versust for the reactor. (c) What fraction of the water that enters the reactor stays there for a time t