TY  - BOOK
AU  - Tin Win
AU  - Takizawa,Satoshi
AU  - Ha,Sung-Ryong
AU  - Ozaki,Hiroaki
ED  - Swiss Agency for Development and Cooperation (SDC),
TI  - Removal of trichloroethylene by pervaporation
T2  - Thesis
PY  - 1998///
CY  - Bangkok
PB  - Asian Institute of Technology
KW  - Pervaporation
KW  - Trichloroethylene
N1  - 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
N2  - 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.
UR  - http://203.159.5.9/ait-thesis/detail.php?q=B13462
ER  -