| Author | Benjawan Tawatsupa |
| Call Number | AIT Thesis no.EV-07-3 |
| Subject(s) | Sewage disposal plants--Thailand--Kamphaeng Phet
|
| 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 |
| Series Statement | Thesis ; no. EV-07-3 |
| Abstract | Wastewater treatment plants arc an obvious high risk source of pathogens both in terms of number and strain of pathogens. The occurrence of microbial pathogens in the raw and oxidation pond-treated wastewater was studied in the context of various biogeochemical factors and climatic conditions over the period of June 2006 to February 2007. The wastewater samples collected from two stabilization pond systems in Thailand (AIT ponds in Pathumthani province, and Kamphaeng Phet ponds in Kamphaeng Phet province). The concentrations of TC, FC and E. coli in AIT WWT plant enumerated in the raw wastewater and were reduced in the pond series, finally discharged into Klong Neung which FC concentration was higher than the requirements recommended by WHO for unrestricted irrigation. While CC par um oocysts were not found in the treated wastewater, G. lamblia cysts were found only in rainy season. The Kalnphaeng Phet WWT plant had more removal efficiency in term of microbial pathogen and phisico-chemical parameters than that of the AIT WWT plant due to the longer HRT, bigger size of pond volume and numbers of the maturation ponds could determine the better performance of ponds system. This study was found no significant impact of physical-chemical parameters and season factors on the concentration of the coliform bacteria, thus the possible removal mechanisms would be the sedimentation of solids-associated bacteria. And the possible removal mechanisms for the protozoa appeared to be time-dependent sedimentation and absorption of (oo) cysts onto settleable solids in addition G. lamblia cysts were found negative correlated (p<0.05) to the solar radiation and detected in sediment higher than that of the overlying water so the removal mechanism of G. lamblia was found to be sedimentation with a result of cumulative effect of HRT with abundant of solar radiation. Moreover, great significance of seasonal effect on the concentrations of protozoa in AIT WWT plant was found. However, the occurrence of protozoan pathogens did not correlate significantly with the presence of bacterial indicator species in AIT WWT plant. |
| Year | 2007 |
| Corresponding Series Added Entry | Asian Institute of Technology. Thesis ; no. EV-07-3 |
| 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) | Shipin, Oleg.; |
| Examination Committee(s) | Thammarat Koottatep;Voranuch Wangsuphachat; |
| Scholarship Donor(s) | RTG Fellowship; |
| Degree | Thesis (M.Sc.) - Asian Institute of Technology, 2007 |