ExampleA well mixed sewage lagoon (a shallow pond) is receiving 430 m5jaof wastewater from a sewer pipe. The lagoon has a surface area o10 Ha and a depth of 1.0 m. The pollutant concentration in the rawsewage being discharged into the lagoon is 180 mg/L. The pollutaritin the raw sewage degrades biologically (decay) in the lagocnaccording to first order kinetics. The reaction rate constant is 0.7 /d.Assuming no losses or gains due to evaporation and rainfall and thelagoon is completely mixed, find the steady state concentration ofthe pollutant in the lagoon effluent.

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Example A well mixed sewage lagoon (a shallow pond) is receiving 430 m3/a of wastewater from a sewer pipe. The lagoon has a surface area o 10 Ha and a depth of 1.0 m. The pollutant concentration in the raw sewage being discharged into the lagbon is 180 mg/L. The pollutant in the raw sewage degrades biologically (decay) in the lagocn according to first order kinetics. The reaction rate constant is 0.7 /d. Assuming no losses or gains due to evaporation and rainfall and the lagoon is completely mixed, find the steady state concentration of the pollutant in the lagoon effluent.

Example A well mixed sewage lagoon (a shallow pond) is receiving 430 m3/a of wastewater from a sewer pipe. The lagoon has a surface area o 10 Ha and a depth of 1.0 m. The pollutant concentration in the raw sewage being discharged into the lagbon is 180 mg/L. The pollutant in the raw sewage degrades biologically (decay) in the lagocn according to first order kinetics. The reaction rate constant is 0.7 /d. Assuming no losses or gains due to evaporation and rainfall and the lagoon is completely mixed, find the steady state concentration of the pollutant in the lagoon effluent.

Structural Analysis

6th Edition

ISBN:9781337630931

Author:KASSIMALI, Aslam.

Publisher:KASSIMALI, Aslam.

Chapter2: Loads On Structures

Section: Chapter Questions

Problem 1P

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Storm Sewers and Detention

The storm drains system transports rainwater or stormwater and other runoff from roads, parking lots, and roof downpipes directly to nearby creeks, rivers, or the sea without any treatment.

Question

Example
A well mixed sewage lagoon (a shallow pond) is receiving 430 m5ja
of wastewater from a sewer pipe. The lagoon has a surface area o
10 Ha and a depth of 1.0 m. The pollutant concentration in the raw
sewage being discharged into the lagoon is 180 mg/L. The pollutarit
in the raw sewage degrades biologically (decay) in the lagocn
according to first order kinetics. The reaction rate constant is 0.7 /d.
Assuming no losses or gains due to evaporation and rainfall and the
lagoon is completely mixed, find the steady state concentration of
the pollutant in the lagoon effluent.

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