Answered: A domestic wastewater with flow rate of…

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 domestic wastewater with flow rate of 5000 m3/d will be disinfected using
chlorine (NaOCl). The experimental studies have demonstrated that the disinfection of this wastewater with chlorine obeys to Chick-Watson Law as shown in Fig. 1 given below:

Use all information available given in problem, design your disinfection system for 99% bacteria inactivation. Your design should include:

1. Dimensions of chlorination tank (L x W x H)
2. Contact time as min
3. Chlorine dose as mg/L
4. Daily amount of NaOCl salt as kg/d
5. Operational cost (TL/d)

Chlorine disinfection for wastewater
10
20
30
40
50
60
-1
-2
-4
-5
-6
Ct
Fig. 1. In activation total coliform with chlorine in domestic wastewater. C: Chlorine dose:
mg/L, t = contact time: min, N = Number of bacteria at time t (CFU/ml)., No: Initial number
of bacteria (CFU/ml)
(°N/N)80|

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