| Author | Chen, Hong |
| Call Number | AIT Thesis no.EV-96-08 |
| Subject(s) | Drinking water--Aluminum content
|
| Note | A thesis submitted in partial fulfillment of the requirements
for the degree of Master of Engineering |
| Publisher | Asian Institute of Technology |
| Abstract | Alum was used as coagulant in this research. Raw water turbidity, raw water E260, coagulant dose and pH are identified as important factors affecting residual aluminum concentration in treated water. The optimum pH range is 5.8-6.2 for coagulation of turbidity, ultraviolet sensitive organics and lowest residual aluminum. The optimum alum dose is set based on the effluent standard of aluminum, initial turbidity and ultraviolet absorbance at 260 nm (E260) of raw water. The relationship between alum dose and E260/turbidity was developed into a formula which is easy to use. Under this optimum condition, residual Al in treated water is less than 0.1 mg/I, turbidity less than 1NTU and removal efficiency of E260 is up to 70%. As it was already found out that organics in Chao Phraya River water was almost similar to those of in Japan and USA, findings obtained in this study could be applicable to most of the natural waters. The results also show that commonly used dose in local water treatment plant is not high enough to keep the residual Al less than 0.1 mg/Land removal efficiency ofE260 up to 70%. Much higher dose is needed to remove more than 70% of E260 from water. |
| Year | 1996 |
| 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) | Kamei, Tasuku; |
| Examination Committee(s) | Annachhatre, Ajit P.;Yang, Byung-Soo; |
| Scholarship Donor(s) | Queen Sirikit Environment Foundation; |
| Degree | Thesis (M.Eng.) - Asian Institute of Technology, 1996 |