Methods for reduction of trihalomethanes in the rural municipality of Macdonald potable water supply system

Simple item page
dc.contributor.authorCho, Steven Y. F.
dc.contributor.examiningcommitteeClark, Shawn (Civil Engineering) Cicek, Nazim (Biosystems Engineering) Barlishen, Kim (Manitoba Water Stewardship)en
dc.contributor.supervisorGorczyca, Beata (Civil Engineering)en
dc.date.accessioned2010-01-13T17:09:16Z
dc.date.available2010-01-13T17:09:16Z
dc.date.issued2010-01-13T17:09:16Z
dc.degree.disciplineCivil Engineeringen_US
dc.degree.levelMaster of Science (M.Sc.)en_US
dc.description.abstractMonitoring data for potable water in the R.M. of Macdonald regional water system indicates elevated levels of chlorine disinfection by-products (DBPs), trihalomethanes (THMs). Dissolved Organic Carbon (DOC) and chlorine dose are the key precursors for the formation of THMs. Currently, the DOC is not removed efficiently at the Sanford water treatment plant, which supplies the R.M.’s potable water distribution system. The raw water DOC concentration incoming to the plant varied from 8.9mg/L to 31.8mg/L during this study. Sanford treated water effluent contained an average DOC of 6.5mg/L and the THM levels ranged from 86.6ppb to 175.7ppb. One of the objectives of this study was to conduct jar tests to optimize Sanford’s water treatment process to improve removal of DOC. Optimization of the coagulation process successfully reduced the DOC level in the plant effluent by 51% during the summer and 34% in the winter. The DOC reduction resulted in a THM reduction of 73.5ppb in the summer and 59.9ppb during the winter. Results showed that removal of 1mg/L of DOC eliminates 26.8ppb of THMs in summer and 11.9ppb during the winter. Another goal of this project was to investigate the relationship between THMs and their precursors, which includes: water DOC, free chlorine residual, and the chlorine contact time. Water samples were strategically collected throughout the Sanford regional water distribution system; the samples were tested for DOC, UV254, SUVA, chlorine residual, and contact time. A linear relationship between THM formation and chlorine contact time (R2 of 0.92) was found. This indicates that the content of THMs can be decreased by reducing the amount of time the water stays in the distribution system.en
dc.description.noteOctober 2009en
dc.format.extent2122381 bytes
dc.format.mimetypeapplication/pdf
dc.identifier.urihttp://hdl.handle.net/1993/3861
dc.language.isoengen_US
dc.rightsopen accessen_US
dc.subjectTrihalomethanesen
dc.subjectDOCen
dc.subjectCoagulationen
dc.subjectSUVAen
dc.subjectSofteningen
dc.subjectDOC Removalen
dc.subjectAluferen
dc.subjectOrganic Matteren
dc.titleMethods for reduction of trihalomethanes in the rural municipality of Macdonald potable water supply systemen
dc.typemaster thesisen_US
Files
Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
Reduction of THMs at R M of Macdonald by Steven Y.F. CHO August 27th 2009.pdf
Size:
2.03 MB
Format:
Adobe Portable Document Format
Description:
Download
License bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
license.txt
Size:
2.33 KB
Format:
Item-specific license agreed to upon submission
Description:
Download
Collections
FGS - Electronic Theses and Practica