03501nam a2200421 4500 20260818180017.0 301198s1998 th r 0000|0 eng d .b11732180 AIT Thesis no. EV-98-1 Tin Win Removal of trichloroethylene by pervaporation Bangkok : Asian Institute of Technology, 1998 79 leaves Thesis ; no. EV-98-1 A thesis submitted in partial fulfillment of the requirements for the degree of Master of Engineering, School of Environment, Resources and Development Thesis (M.Eng.) - Asian Institute of Technology, 1998 Pervaporation can compete with conventional treatment technologies in the removal of the Volatile Organic Compounds (VOCs) like trichloroethylene (TCE) and 1,1,1- trichloroethane (TCEthane) from groundwater to obtain the drinking water standard while simultaneously creating technical problems in the application of conventional groundwater treatment technologies. In this study, TCE was chosen as a pollutant, and TCEthane was considered as a co-contaminant. The concentration of TCE used is limited about 1,000 æg/L by comparing with that in groundwater. The use of a multi-layered composite hollow fiber membrane module with both positive pressure air-stripping and negative pressure air-stripping for separating the VOCs from groundwater was evaluated. The effects of the flow rates of both air and water, the liquid phase composition, the water solution temperature and binary compound on the behavior, mass transport, selectivity and swelling of membrane were studied. The behavior of membrane was also analyzed in relation to vacuum pressure separation process. Among three pervaporation methods tested, the efficiency of TCE removal was obtained in order of the Negative Pressure Air-stripping Process, Positive Pressure Air-stripping Process and the Vacuum Pressure Separation Process. In Negative Pressure Air-stripping Process, 90% of initial TCE concentration (1,000 æg/L) in water can be removed within one hour, and the maximum TCE flux was obtained as 4.716 mgT CE/m2 -hr at an air flow rate of 5 L/min and a water flow rate of 5 L/min. Pervaporation Trichloroethylene Takizawa, Satoshi, Chairperson Ha, Sung-Ryong, Examination committee Ozaki, Hiroaki, Examination committee Swiss Agency for Development and Cooperation (SDC), Scholarship donor Asian Institute of Technology. Thesis ; no. EV-98-1 Full-Text http://203.159.5.9/ait-thesis/detail.php?q=B13462 .b11732180 mnait y 240407 0 981130 m a y 0 mnait mnait mnarc 20 40 Barcode : 30050120656177 CREATED : 1997-03-07 RECORD # : i12109873 LPATRON : 1017419 LCHKIN : 2005-01-04 # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 7 TOT RENEW : 11 Barcode : 30050120656185 CREATED : 1997-03-07 RECORD # : i12109885 LPATRON : 1014418 LCHKIN : 2001-02-19 # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 3 TOT RENEW : 0 Barcode : 30050160078100 CREATED : 2016-05-23 RECORD # : i1298730x LPATRON : 0 LCHKIN : - # RENEWALS : 0 # OVERDUE : 0 IUSE3 : 0 TOT CHKOUT : 0 TOT RENEW : 0 99498 99498 0 0 0 0 MAIN MAIN mnait 2026-08-18 0 AIT Thesis no. EV-98-1 30050120656177 2026-08-18 18:00:17 1 2026-08-18 20 0 0 0 0 MAIN MAIN mnait 2026-08-18 0 AIT Thesis no. EV-98-1 30050120656185 2026-08-18 18:00:17 2 2026-08-18 20 0 0 0 0 MAIN MAIN mnarc 2026-08-18 0 AIT Thesis no. EV-98-1 30050160078100 2026-08-18 18:00:17 2026-08-18 40