| Author | Pandey, Janardan Raj |
| Call Number | AIT Thesis no. EV- 87-8 |
| Subject(s) | Filters and filtration
|
| 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 | Crossflow microfiltration is a pressure driven membrane process
in which the fluid to be filtered flows parallel to the membrane
surface, which reduces the formation of filter cake allowing better
permeate flow.
Laboratory-scale microfiltration experiments with kaolin clay
and latex suspension were carried out to study the membrane filter
performance with respect to operating parameters. The operating
parameters choosen were membrane pore size , particle size , particle
concentration, crossflow velocity and applied pressure. It was found
that clogging in the membrane occurs fast in case of bigger membrane
pore size and finer particles. Also the existence of a optimum crossflow
velocity (for which the filtration rate is maximum) was noticed . This
filtration rate could be increased by increasing the module entrance
pressure . The filtrate quality continued improving as the filtration
proceeds.
In this study, a mathematical model was formulated to predict
the filtrate efficiency of the membrane filter. The developed model , was
verified with the laboratory-scale experiments. The filtrate efficiency
predicted by t his model differed from that of experimental value as t he
assumptions made in t he development of model were suitable only for
ideal cases.
Also an empirical model to correlate the membrane fouling of
different pore sizes was found. A standard curve was developed between
percentage of pores blocked and total solids deposited on the membrane,
to predict the fouling of t he membrane of different pore sizes which may
be useful in extrapolation of data. |
| Year | 1987 |
| Type | Thesis |
| School | School of Environment, Resources, and Development (SERD) |
| Department | Other Field of Studies (No Department) |
| Academic Program/FoS | Environmental Engineering and Management (EV) |
| Chairperson(s) | Vigneswaran, Saravanamuthu |
| Examination Committee(s) | Hanaki, K. ;Shin, H. S.
|
| Scholarship Donor(s) | Danish International Development Agency
(DANIDA) |
| Degree | Thesis (M. Eng.) - Asian Institute of Technology, 1987 |