| Author | Jusi, Oscar del Mundo |
| Call Number | AIT Thesis no. EV-87-18 |
| Subject(s) | Water--Purification--Filtration
|
| Note | A thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineering, School of Environment, Resources and Technology |
| Publisher | Asian Institute of Technology |
| Abstract | Horizontal Flow Coarse Media Pre-Filtration is an
alternative pre-treatment method in a rural water supply
system. A detailed study in its turbidity removal pattern as
well as its potential as a filter alternative in the
chlorination -filtration process for iron removal is necessary
to see its applicability in small community water supply
systems .
This study was conducted to determine the effects of
various physical parameters and chemical addition in the
turbidity and iron removal efficiency of the hori7.ontal filter.
The study revealed t ha t the turbidity removal efficiency is
dependent on the filtration rate , media size a nd filter length.
Addition of flocculant in the form of alum improves t he
turbidity removal efficiency , however its effectiveness is
limited in the initial hours of operation for filtration rates
higher than 0 .76 m3 / m2 - h with media size of 0.40 cm. The
average removal efficiency is directly proportional to t he
filter media size but inversely proportional to filtration rate
for both filter runs with or without flocculant. However , the
initial Kaolin clay concentration has different effects o n both
conditions. For filter runs with flocculant , it is inversely
proportional to removal efficiency but for runs without
flocculant, its effect is negligible. Horizontal filter is
only marginally effective in the iron removal. Even with the
addition of chemicals , removal efficiency is only 35% at a
filtration rate of 0. 54 m3 / m2 - h using media size of 0 .40 cm a t
40 cm filter length.
Initial studies were also made to investigate the
performance of Matrix filter in the turbidity and iron removal.
Results showed that it has a good potential for both turbidity
a nd iron removal. |
| 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) | I, Fude ;Samorn Muttamara ;Orth, Hermann M.
|
| Scholarship Donor(s) | German Academic Exchange Service (DAAD )
Federal Republic of Germany |
| Degree | Thesis (M.Eng.) - Asian Institute of Technology, 1987 |