| Author | Faruquzzaman, Md. |
| Call Number | AIT Thesis no.826 |
| Subject(s) | Water--Purification--Filtration
|
| Note | A thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineering of the Asian Institute of Technology, Bangkok, Thailand. |
| Publisher | Asian Institute of Technology |
| Abstract | An attempt was made on series filtration to find more suitable
materials available in Asian villages as filter media. In this study, coconut husk fiber and crushed stones were used as roughing filter media, whereas, burnt rice husk and sand were selected as polishing materials. The filtration was carried out with the different combinations and arrangements of above materials. Coconut husk fiber was placed under different degrees of compaction keeping the optimum depth of 80 cm whereas 60 cm was for polishing medium. The flow rate was
1.25 m3 /m2-hr and filtration was conducted without coagulant. It was found that the compaction in coconut husk fiber had insignificant effect on effluent and at higher degree of compaction shorter was the
filter run. Again, the performance under same compaction of coconut husk fiber was better when only burnt rice husk was used as polishing material. Whereas crushed stone as roughing material gave the worst result. The study was also carried out on slow sand filter coupled with a roughing filter of 80 cm coconut husk fiber depth. The. flow rate maintained was 0.4 m3 /ma-hr. In this case, filter was operated for both with and without the use of coagulant. The performance of filter was observed after scraping off the top layer of sand keeping the
whole bed under submerged condition. The coliform removal efficiency was found to be 93% right after the submerged scraping of bed. |
| Year | 1975 |
| Type | Thesis |
| School | Student Research Before 1980 |
| Department | Other Field of Studies (No Department) |
| Academic Program/FoS | Thesis (Year <=1979) |
| Chairperson(s) | Nguyen Cong Thanh |
| Examination Committee(s) | Htun, Maung Nay ;Pescod, M.B. |
| Scholarship Donor(s) | Government of
United Kingdom |
| Degree | Thesis (M. Eng.) - Asian Institute of Technology, 1975 |
| Contributor(s) | Filters and filtration |