| Author | Chatree Kulchatchai |
| Call Number | AIT SSPR no. EV-84-4 |
| Subject(s) | Filters and filtration
|
| Note | A special study submitted in partial fulfillment of requirements for the Diploma of Asian Institute of Technology, School of Environment, Resources & Development |
| Publisher | Asian Institute of Technology |
| Abstract | The study of a pilot scale slow sand filter using the influent which passed through a coconut hzsk fiber prefilter, with the effluent rate from the slow sand filter of 0.15 m3 /m2 /h can be summarized as follows:
The first experimental run: As the effluent from the prefilter was filtered by slow sand filter, it was found that the colour removal was in between 15.9- 28 .1%, turbidity removal 31.5- 42.1%, coliform removal 74-80.5% . During this experimental
run, anaerobic condition took place in the process .
The second experimental run: The effluent from prefilter was aerated so that the D.O. content was up to 5-6 mg/l before entering the slow sand filter. After passing through the slow sand filter, it was found that colour removal was in
between 46.9-49.2% turbidity removal 38 . 2-42.3% and coliform removal 75.7-89.4%
while the aerobic condition took place in the process.
In this experiment, the degree of pollution of raw water was considerable high with COD of 130 mg/ l. Therefor e , it may be said that the Horizontal coconut husk fiber prefilter tube is unsuitable for high polluted raw water since it may create
anaerobic condition in the slow sand filter also. therefore , raw water quality plays a very important role in the application of horizontal coconut husk fiber
prefilter tube as the prefilter of the system. |
| Year | 1984 |
| Type | Special Study Project Report (SSPR) |
| School | School of Environment, Resources, and Development |
| Department | Department of Energy and Climate Change (Former title: Department of Energy, Environment, and Climate Change (DEECC)) |
| Academic Program/FoS | Environmental Engineering (EV) |
| Chairperson(s) | Samorn Muttamara |
| Examination Committee(s) | Nguyen, Cong Thanh ; Vigneswaran, Saravanamuthu; |
| Scholarship Donor(s) | Federal Republic of Germany (DAAD) . |
| Degree | Special Studies Project Report (M. Eng.) - Asian Institute of Technology, 1984 |