Disinfection of the municipal water systems is mostly achieved by means of chlorine
addition at water treatment plants known as sources. Thus, there should be an adequate
chlorine concentration at the source for an effective disinfection throughout the system
by considering upper and lower limits of disinfectant. However, since the disinfectants
are reactive and decays through the system, chlorine added at the source may not
be enough to maintain desired disinfectant residuals which may lead to water quality
problems in the water distribution system. Moreover, the disinfectants such as chlorine
has also an effect to be carcinogen due to formation of disinfectant by-products. Thus,
the system should balance the amount of disinfectant supplied while minimizing the
health risk. In such a case, it is recommended that one or more booster disinfection
stations can be located throughout the system. Such a method can provide more uniform
distribution of the chlorine concentration while reducing the amount of the disinfectant
used. In this thesis, optimum scheduling, and injection rates of the booster disinfection
stations have been searched. The objective is to minimize the injected mass dosage
rate subjected to the provision of adequate and more uniform residual concentration in
the network. Determination of variable network hydraulics and chlorine concentrations
is held out by EPANET network simulation sofware. A C++ code was developed to
interface with EPANET by means of the EPANET Programmer' / s Toolkit for linear optimization of the disinfectant mass dosage rate applied to the network.
| Identifer | oai:union.ndltd.org:METU/oai:etd.lib.metu.edu.tr:http://etd.lib.metu.edu.tr/upload/2/12610755/index.pdf |
| Date | 01 July 2009 |
| Creators | Sert, Caglayan |
| Contributors | Altan Sakarya, A. Burcu |
| Publisher | METU |
| Source Sets | Middle East Technical Univ. |
| Language | English |
| Detected Language | English |
| Type | M.S. Thesis |
| Format | text/pdf |
| Rights | To liberate the content for METU campus |
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