Investigation of Chlorinated Haloacetic Acids Biodegradation in Drinking Water Treatment Process
Date Issued
2009
Date
2009
Author(s)
Ting, Shin-Chun
Abstract
In order to reduce the human health impacts due to pathogens in drinking waters, it is important to apply disinfection before distribution. Disinfectants widely used nowadays are chlorine or chloramides. These disinfectants react with nature organic matters in water, and produce disinfection by-products (DBPs).Trihalomethanes (THMs) and Haloacetic acids (HAAs) are two of the DBPs with highest amount by weight from chlorination. HAAs affect to influence hepatic, reproductive, and developmental functions possibly, and they may be mutagenic and carcinogenic in animal studies. Previous studies had showed that HAA biodegradation could happen during water treatment process. This study aimed at one of the water treatment plant in southern Taiwan which had high HAA concentrations and investigated the changes of three HAAs (MCAA、DCAA and TCAA) during treatment process at different seasons. The results showed that HAAs were produced mostly at summer, and could be reduced significantly after passing through the rapid sand filtration process. It is considered to be connected with biodegradation upon filtration sands. This study used DGGE to explore the microbial’s population in each treatment process, as well as analyzing the main bacterial species in filtration sands, and this result could help us to understand microbial communities in water treatment process.
Subjects
Haloacetic acids
Biodegradation
Rapid sand filtration
Water Treatment
SDGs
Type
thesis
File(s)![Thumbnail Image]()
Loading...
Name
ntu-98-R95541105-1.pdf
Size
23.53 KB
Format
Adobe PDF
Checksum
(MD5):85517b60b9eefce0af094c4c46b16ab2