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Poorly treated municipal wastewater is discharged directly into a lake. The discharge from the wastewater plant into the lake occurs at a flow of Qd = 1 m3/hr. The concentration of a pollutant (i.e. pollutant X) in the discharge flow (Cx,d) that is decaying with first-order kinetics is 100 mg/L. The lake has a volume of 100 m3. (Pollutant X is removed with a first-order decay rate constant equal to 0.20/day.) The concentration of the pollutant in the incoming river (Cx,r) is 10 mg/L. The incoming river flow rate is Qr = 10 m3/hr. A) What would the Phosphate concentration be in the lake at steady state in the previous problem in the unit of mg/L?

Poorly treated municipal wastewater is discharged directly into a lake. The discharge from the wastewater plant into the lake occurs at a flow of Qd = 1 m3/hr. The concentration of a pollutant (i.e. pollutant X) in the discharge flow (Cx,d) that is decaying with first-order kinetics is 100 mg/L. The lake has a volume of 100 m3. (Pollutant X is removed with a first-order decay rate constant equal to 0.20/day.) The concentration of the pollutant in the incoming river (Cx,r) is 10 mg/L. The incoming river flow rate is Qr = 10 m3/hr. A) What would the Phosphate concentration be in the lake at steady state in the previous problem in the unit of mg/L?

Introduction to Chemical Engineering Thermodynamics
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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Poorly treated municipal wastewater is discharged directly into a lake. The discharge from the wastewater plant into the lake occurs at a flow of Qd = 1 m3/hr. The concentration of a pollutant (i.e. pollutant X) in the discharge flow (Cx,d) that is decaying with first-order kinetics is 100 mg/L. The lake has a volume of 100 m3. (Pollutant X is removed with a first-order decay rate constant equal to 0.20/day.) The concentration of the pollutant in the incoming river (Cx,r) is 10 mg/L. The incoming river flow rate is Qr = 10 m3/hr. A) What would the Phosphate concentration be in the lake at steady state in the previous problem in the unit of mg/L?
Transcribed Image Text:Poorly treated municipal wastewater is discharged directly into a lake. The discharge from the wastewater plant into the lake occurs at a flow of Qd = 1 m3/hr. The concentration of a pollutant (i.e. pollutant X) in the discharge flow (Cx,d) that is decaying with first-order kinetics is 100 mg/L. The lake has a volume of 100 m3. (Pollutant X is removed with a first-order decay rate constant equal to 0.20/day.) The concentration of the pollutant in the incoming river (Cx,r) is 10 mg/L. The incoming river flow rate is Qr = 10 m3/hr. A) What would the Phosphate concentration be in the lake at steady state in the previous problem in the unit of mg/L?
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