| Author | Awrapin Ketratanakul |
| Call Number | AIT Thesis no.EV-85-20 |
| Subject(s) | Sewage--Purification--Biological treatment
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| Note | A thesis submitted in partial fulfillment of the requirements for the degree of Master of Science, School of Environment, Resources and Development |
| Publisher | Asian Institute of Technology |
| Abstract | The behavior of coliphage in natural stream was investigated to understand the relationship between adsorption-inactivation processes of coliphage and environmental factors. The investigation was divided into two parts. The first part was a field survey of physical-chemical and microbiological characteristics of some aerobic-anaerobic canals, including oxidation ponds of AIT. the second part was the investigation of the effects of pH, electrolytes, dissolved oxygen and sunlight on the adsorption-inactivation processes of coliphage. The strain of coliphage was more sensitive to pH below 7.0 than to pH above 7.0 and was inactivated completely at pH 3.0. kaolin adsorbed coliphage under the presence of Na+ at pH 11.0. However, kaolin did not play an important role when Mg+2, and Ca +2 formed floc at observed pH 9.0-11.0. The floc-formed adsorbed coliphage in greater extent-99% adsorption in case of Mg +2 at pH 11.0 and 60% in case of Ca +2 at the same pH. The adsorption amount of coliphage to algal and bacterial particulates increased in high Do level, whereas the desorption occurred in low Do level and anaerobic condition. The coliphage was capable to survive under both aerobic and anaerobic conditions. Sunlight inactivated coliphage directly in laboratory investigation. In natural waters. such as facultative pond, however, the total coliphage concentration did not change during the day time, due to the turbidity and inability of the light penetration into water. The adsorption of coliphage to algae and suspended materials occurred in facultative pond during photosynthesis took place because of the increase in Do. |
| Year | 1985 |
| Type | Thesis |
| School | School of Environment, Resources, and Development (SERD) |
| Department | Other Field of Studies (No Department) |
| Academic Program/FoS | Environmental Engineering and Management (EV) |
| Chairperson(s) | Ohgaki, S. |
| Examination Committee(s) | Lohani, B.N. ;Vigneswaran, S. ;Chongrak Polprasert |
| Scholarship Donor(s) | The Government of Japan |
| Degree | Thesis (M.Sc.) - Asian Institute of Technology, 1985 |