| Author | Wang, Dongmei |
| Call Number | AIT Thesis no.EV-99-5 |
| Subject(s) | Water--Purification--Reverse osmosis process
|
| 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 | The recent development of new generation ultra-low pressure reverse osmosis
(ULPRO) and low-pressure reverse osmosis (LPRO) membranes have received attraction in
the field of wastewater and water treatment through an increasing stringent regulation for
drinking purpose and water reclamation. In this research, the applications of ULPRO and
LPRO membranes on groundwater treatment have been investigated in both laboratory and
pilot scale experiments.
In laboratory experiments, performance of ULPRO membrane ES20, LPRO
membranes, LFlO, NTR-759HR, NTR-729HF, and NTR-7450 for groundwater treatment was
studied by using dead-end filtration process. Rejection and flux as the function of applied
pressure were compared among the above membranes. Experiments were carried out under
low operating pressure range (0.4 - 1.0MPa for LPRO membrane, and 1.0 -2.0MPa for LPRO
membranes). ES20, LFlO, and NTR-759HR membranes showed rejection more than 90%,
while it was more than 80% for membranes NTR-729HF, and NTR-7450.
According to the results of laborat01y experiments, LPRO membrane LFl 0 was
selected in pilot scale experiment by using cross-flow filtration process. Rejection and flux
were determined under feed pressure range 0.5 - l.OMPa. 100% rejection for iron, manganese,
and calcium was observed.
Rejection of nitrate and phosphorus in mixed NaN03 and KH2P04 solution was
dete1mined as the function of feed concentration in both laboratory and pilot scale
experiments. Rejection decreasing as feed concentration increasing was found from
experiments.
Comparing membrane behavior in laboratory and pilot scale experiment, high rejection
and constant flux were achieved from pilot scale experiment. It was also concluded from
experimental results, ULPRO and LPRO membranes can be effectively used for groundwater
treatment. |
| Year | 1999 |
| Type | Thesis |
| School | School of Environment, Resources, and Development (SERD) |
| Department | Department of Energy and Climate Change (Former title: Department of Energy, Environment, and Climate Change (DEECC)) |
| Academic Program/FoS | Environmental Engineering (EV) |
| Chairperson(s) | Ozaki, Hiroaki ; |
| Examination Committee(s) | Annachhatre, Ajit P. ;Visvanathan, C. ; |
| Scholarship Donor(s) | Asian Institute of Technology (Partial Scholarship); |
| Degree | Thesis (M.Eng.) - Asian Institute of Technology, 1999 |