| Author | Visvanathan, C. |
| Call Number | AIT Thesis no. EV-84-4 |
| Subject(s) | Filters and filtration--Mathematical models
|
| Note | A thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineering, School of Environment, Resources and Development |
| Publisher | Asian Institute of Technology |
| Abstract | Mobile bed filter is an improved version of deep bed filter. In
mobile bed filter, backwashing is eliminated by continuous sand
recycling . This sand recycling is an energy consuming process. In
view of this , an optimum sand recycling rate is calculated from fixed bed experimental studies using clogging front theory.
Laboratory-scale mobile bed filter experiments were carried out to verify the clogging front theory . It was found that the clogging front theory is valid only f or low filtration velocities. The recycle rate calculated tram fixed bed experimental results using clogging front theory agrees very well with the mobile bed experimental optimum
recycle rates at low filtration rates. In this study, a mathematical model for mobile bed filters, has
been formulated incorporating particle retention pattern , flocculation
within the filter bed and sand bed displacement. The developed mathematical model was verified with the laboratory-scale experiments .
Although t he model predict s the concentration profile satisfactorily, the headless profile predicted by this model differs from that of
experimental value. |
| Year | 1984 |
| Type | Thesis |
| 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 and Management (EV) |
| Chairperson(s) | Vigneswaran, Saravanamuthu
|
| Examination Committee(s) | I, Fude ; Chongrak Polprasert
|
| Scholarship Donor(s) | The Government of Switzerland |
| Degree | Thesis (M.Eng.) - Asian Institute of Technology, 1984 |