| Author | Sawang Notthakun |
| Call Number | AIT Thesis no. EV-84-6 |
| 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 | Direct filtration consists of unit operations like
coagulation, flocculation and filtration without the use o f
sedimentation. The experiment al unit used in this study includes a spiral flocculator and a deep bed filter. The velocity
gradient determination is easy and accurate in t he spiral
flocculator . Since the floes formed at given velocity gradient and flocculation time are of uniform size , the mathematical
formulation between diameter of flocs, velocity gradient and
flocculation time becomes precise. The experiments performed with
the pilot-scale direct-filtration unit indicate that:
-There exists a threshold flocculation time for which
filtration run lengths are longest at minimum flocculation
requirements.
-The less the alum dose , the higher the thresh old
flocculation time.
-The higher the flocculation gradient , the less the
threshold flocculation time .
The simulation study performed indicates that the direct
filtration can be predicted and optimize d with the help of
limited number of pilot-scale direct filtration experiments. |
| 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) | Nguyen, Cong Thanh ; Samorn Muttamara
|
| Scholarship Donor(s) | The Government of Australia |
| Degree | Thesis (M.Eng.) - Asian Institute of Technology, 1984 |