Influence of dissolved organic matter in ceramic membrane filtration performance in drinking water treatment | |
| Author | Nunthaporn Monthakanti |
| Call Number | AIT Thesis no.EV-11-08 |
| Subject(s) | Drinking water--Purification--Thailand Drinking water--Standards |
| Note | A thesis submitted in partial fulfillment of the requirements for the degree of Master of Science in Environmental Engineering and Management |
| Publisher | Asian Institute of Technology |
| Abstract | Chlorination is used as the final barrier against microbiological contamination in water treatment plants. Nonetheless, the chlorination process has human health effect because when chlorine reacts with dissolved organic matter (DOM), it can form trihalomethanes (THMs) which is carcinogenic. In this research, AIT pond water and Khlong Prapa river water were used as feed water to identify the major foulant on ceramic membrane filtration (CMF). Furthermore, the treated water from CMF and conventional treatment were compared the water quality and measured thihalomethane formation potential (THMFP). These two surface waters with significantly different water quality were tested for the experimental work. The optimum condition from Jar-tesing which used in pilot scale unit was 15 mg/L of PACl coagulant and 400 rpm of mixing in coagulation unit. Both water sources were isolated into hydrophilic, hydrophobic and transphilic fraction by DAX-8 and XAD-4 resins. Hydrophobic was the highest fraction in both water sources. AIT pond water included with 59% hydrophobic, 27% hydrophilic and 14% transphilic. Khlong Prapa river water contained 45% hydrophobic, 35% hydrophilic and 20% transphilic. The hydrophobic fraction also had high percentage of DOC and UV254 absorbance removal through CMF. The major foulant on CMF was hydrophilic fraction which showed the highest flux decline among three fractions. The causes of membrane fouling due to it adsorbed on membrane surface or into membrane pore. The comparison of treated water from CMF pilot system and Bangkhen water treatment plant (BWTP), CMF pilot system had better performance than BWTP conventional treatment in term of water quality. CMF pilot system could remove turbidity from raw water more than 99.5%. No detection of suspended solid, total coliform and E-coli were found in CMF filtrated water. The removal efficiency of DOC and UV254 absorbance of CMF pilot system had higher than BWTP conventional treatment. Moreover, due to higher efficiency DOC removal of CMF pilot system, DOC in CMF filtrate formed less THMFP concentration than filtrated water from BWTP conventional treatment. |
| Year | 2011 |
| Type | Thesis |
| School | School of Environment, Resources, and Development (SERD) |
| Department | Department of Energy and Climate Change (Former title: Department of Energy, Environment, and Climate Change (DEECC)) |
| Academic Program/FoS | Environmental Engineering and Management (EV) |
| Chairperson(s) | Chettiyappan Visvanathan; |
| Examination Committee(s) | Shipin, Oleg;Thammarat Koottatep;Manit Pongchalermporn; |
| Scholarship Donor(s) | RTG Fellowship; |
| Degree | Thesis (M.Sc.) - Asian Institute of Technology, 2011 |