1. [Flow equalisation, effect of equalisation on BOD mass loading rate]. Consider the volumet flowrates and BOD concentrations given in the following table: Time period midnight-1am 1am-2am 2am-3am 3am-4am 4am-5am 5am-6am 6am-7am 7am-8am 8am-9am 9am-10am 10am-11am 11am-12 12-1pm 1pm-2pm 2pm-3pm 3pm-4pm 4pm-5pm 5pm-6pm 6pm-7pm 7pm-8pm 8pm-9pm 9pm-10pm 10pm-11pm 11pm-midnight Average flowrate during time period (m³/s) 0.275 0.220 0.165 0.130 0.105 0.100 0.120 0.205 0.355 0.410 0.425 0.430 0.425 0.405 0.385 0.350 0.325 0.325 0.330 0.365 0.400 0.400 0.380 0.345 Average BOD concentration during time period (mg/L) 150 115 75 50 45 60 90 130 175 200 215 220 220 210 200 190 180 170 175 210 280 305 245 180 a) Calculate the equalised average flowrate for the day (flowrate fed to downstream processes [Ans: 0.307 m³/s = 1105.2 m³/hr] b) Using the graphical method, (use spreadsheet and/or graph paper), calculate the inli storage volume required to equalise the flow rate (flowrate equalisation volume) [Ans: 4110 m³] c) Determine the dampening effect of flow equalisation on BOD mass loading.
1. [Flow equalisation, effect of equalisation on BOD mass loading rate]. Consider the volumet flowrates and BOD concentrations given in the following table: Time period midnight-1am 1am-2am 2am-3am 3am-4am 4am-5am 5am-6am 6am-7am 7am-8am 8am-9am 9am-10am 10am-11am 11am-12 12-1pm 1pm-2pm 2pm-3pm 3pm-4pm 4pm-5pm 5pm-6pm 6pm-7pm 7pm-8pm 8pm-9pm 9pm-10pm 10pm-11pm 11pm-midnight Average flowrate during time period (m³/s) 0.275 0.220 0.165 0.130 0.105 0.100 0.120 0.205 0.355 0.410 0.425 0.430 0.425 0.405 0.385 0.350 0.325 0.325 0.330 0.365 0.400 0.400 0.380 0.345 Average BOD concentration during time period (mg/L) 150 115 75 50 45 60 90 130 175 200 215 220 220 210 200 190 180 170 175 210 280 305 245 180 a) Calculate the equalised average flowrate for the day (flowrate fed to downstream processes [Ans: 0.307 m³/s = 1105.2 m³/hr] b) Using the graphical method, (use spreadsheet and/or graph paper), calculate the inli storage volume required to equalise the flow rate (flowrate equalisation volume) [Ans: 4110 m³] c) Determine the dampening effect of flow equalisation on BOD mass loading.
Introduction to Chemical Engineering Thermodynamics
8th Edition
ISBN:9781259696527
Author:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Publisher:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Chapter1: Introduction
Section: Chapter Questions
Problem 1.1P
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