Degradation of chlorinated organic substances by photo-catalytic membrane reactor | |
| Author | Win Htut |
| Call Number | AIT Thesis no. EV-98-10 |
| Subject(s) | Water--Purification--Organic compounds removal Photocatalysis |
| 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 | Due to the time limitation, ground water sample couldn't be collected. Thus TCE(l OOµg/l to 500µg/l) was chosen as a pollutant and dissolved into the distilled water. In this study, water containg trichloro ethylene (TCE) was treated by using the catalytic ceramic membrane and UV irradiation. The effect of different water flow rate, different TCE concentration and different light intensity were studied in this thesis. The effect of concentration was studied with the low concentration (93.75 µg/m3 ) and high concentration (187.5 ~tg ) of trichloroethylene and results showed that high concentration, high flow rate and high light intensity gave the high removal efficiency. The rate of the TCE oxidation follows a first order reaction with respect to the TCE concentration. It is necessary to generate powerful oxidants (OH-- ) for the removal of VOCs from ground water. Photo-catalytic oxidation methods was known to effectively degrade and, in several cases, mineralize contaminants ranging from inorganic compounds (such as cyanides) to chlorinated aliphatic compounds and complex aromatic compounds in reaction times on the order of the minutes to the hours. Improved system configuration and quantum efficiency of photoreactors are likely to improve that the economics of Ti02 assisted photodegradation for ground water treatment, especially with the use of UV irradiation. Ti02 catalyst used in this process, is inexpensive semiconductor, stable upon photo-irradiation and affordable to many H20 and wastewater treatment utilities. Higher light intensity gave the higher removal efficiency. In this experiment, removal rates were 26.1 mg/m2 .hr for 1400- 1500 µ W/ cm2 and 11.6 mg/tn2 ·.hr for 400- 500 µW/ cm2 • |
| Year | 1998 |
| 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) | Takizawa, Satoshi |
| Examination Committee(s) | Ozaki, Hiroaki ;Ha, Sung- Ryong |
| Scholarship Donor(s) | Swiss Agency for Development and Cooperation (SOC) |
| Degree | Thesis (M.Eng.) - Asian Institute of Technology, 1998 |