Comparison in membrane permeability and fouling reduction by ozonation-microfiltration system | |
| Author | Mohtar, Wan Hanna Melini Wan |
| Call Number | AIT Thesis no.EV-05-35 |
| Subject(s) | Ozonization Membrane (Technology) Fouling |
| Note | A thesis submitted in partial fulfillment of the requirements for the degree of Master of Science |
| Publisher | Asian Institute of Technology |
| Abstract | In this research, the mechanism of fouling reduction by means of ozone was investigated using sample taken from wastewater treatment facility. To distinguish the effect of ozonation pretreatment on membrane fouling, the effect of particle size increase from particle destabilization, organic degradation from high molecular weight to low molecular weight, and biofouling reduction from microbiology disinfection. The results showed that ozonation degraded high molecular weight compounds to low molecular weight compounds. MPN E.Coli colony counting showed that ozonation disinfected E.Coli completely and reduce the severity of biofouling. The SEM images on the membrane cross-section revealed that the thickness of foulant layer was reduced 50% from 3.2 L,m without ozone treatment to 1.40m by means of ozone oxidation. However, TOC analysis revealed that permeate quality was decreased 70% as ozonation pretreatment increased the TOC concentration in permeate than without ozone., and the amount of small particle size distribution (less than 50m) was increased. The specific cake resistance (D) and cake resistance R, both showed a decreased value when ozonation-microfiltration system was applied. From these results, the major membrane fouling reduction effect was resulted from the degradation of organic compound from high molecular weight to low molecular weight and microbiology disinfection. However, with respect to permeate quality, ozone treatment was not good effect. This could be due to the fact that foulants degraded from high molecular weight material to low molecular penetrate through membrane into the permeate. The increase of TOC concentration is another result of degradation reaction |
| Year | 2005 |
| 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 and Management (EV) |
| Chairperson(s) | Won, Park Dae; |
| Examination Committee(s) | Visvanathan, C.;Su, Choi Yong; |
| Scholarship Donor(s) | Korea Institute of Science and Technology;Asian Institute of Technology; |
| Degree | Thesis (M.Sc.) - Asian Institute of Technology, 2005 |