A river with 400 ppm of salts (a conservative substance) and an upstream flow of 25.0 m3 /s receives an agricultural discharge of 5.0 m3 /s carrying 2,000 mg/L of salts (see Figure). The salts quickly become uniformly distributed in the river. A municipality just downstream withdraws water and mixes it with enough pure water (no salt) from another source to deliver water having no more than 500 ppm salts to its customers. What should be the mixture ratio F of pure water to river water?
A river with 400 ppm of salts (a conservative substance) and an upstream flow of 25.0 m3 /s receives an agricultural discharge of 5.0 m3 /s carrying 2,000 mg/L of salts (see Figure). The salts quickly become uniformly distributed in the river. A municipality just downstream withdraws water and mixes it with enough pure water (no salt) from another source to deliver water having no more than 500 ppm salts to its customers. What should be the mixture ratio F of pure water to river water?
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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Question
. A river with 400 ppm of salts (a conservative substance) and an upstream flow of 25.0
m3
/s receives an agricultural discharge of 5.0 m3
/s carrying 2,000 mg/L of salts (see
Figure). The salts quickly become uniformly distributed in the river. A municipality just
downstream withdraws water and mixes it with enough pure water (no salt) from
another source to deliver water having no more than 500 ppm salts to its customers.
What should be the mixture ratio F of pure water to river water?
Transcribed Image Text:500 рpm
FQ m³/s
O ppm
25.0 m³/s
400 ppm
e m³/s
5.0 m³/s
2,000 ppm
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