碩士 / 國立交通大學 / 環境工程系所 / 104 / Algal eutrophication often occurs in reservoirs associating with the increase of algogenic organic matter (AOM). Because AOM is one of the major precursors to disinfection by-products (DBPs) in drinking water treatment, it is crucial in investigating the physiochemical properties of AOM and its impact on DBPs formation potential (DBPFP). The goal of this study was to separate extracellular (EOM), intracellular organic matter (IOM) and cell-wall organic matter (COM) in each algae growth phase and to characterize their physico-chemical properties and composition and thier corresponding DBPFP, including trihalomethanes (THMs) and haloacetic acids (HAAs). Raw water was collected from the reservoirs in Matsu to isolate the common green alga, Chlorella sp.. Chlorella sp. cultured in a 6 L photo-bioreactor in modified Chlorella medium with 90% Air and 10% CO2 (Illumination：35 μmol/m2/s, Temperature：30°C). The algae growth phases were determined by chlorophyll a, dry mass and DOC. The water samples of EOM, IOM and COM were collected by a serial filtration-gridding protocol at each growth phase. The results during different growth phases in 3D EEM showed that EOM mainly comprised of fulvic acid-like substances, while IOM and COM dominantly comprised of aromatic protein-like substances. The average fluorescence intensity (AFI) of EOM increased gradually in exponential phase, then decreased during stationary phase. The AFI of IOM decreased slowly and increased at stationary phase, but there was no apparent change in the AFI of COM. The yield of haloacetic acid formation potential (HAAFP) from EOM, IOM and COM were higher than trihalomethane formation potential (THMFP). C-DBPFP of IOM was also higher than that of EOM and COM. In addition, the intensity of aromatic protein-like in 3D EEM had a great Pearson correlation coefficient with the yield of C-DBPFP which can reach to 0.956. The results confirm that algal growth phases remarkably affect the yield of C-DBPFP.
| Identifer | oai:union.ndltd.org:TW/104NCTU5515027 |
| Date | January 2016 |
| Creators | Syue, Ming-Yang, 薛名洋 |
| Contributors | Huang, Chih-Pin, 黃志彬 |
| Source Sets | National Digital Library of Theses and Dissertations in Taiwan |
| Language | zh-TW |
| Detected Language | English |
| Type | 學位論文 ; thesis |
| Format | 50 |
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