| Summary: | 碩士 === 國立臺北科技大學 === 材料及資源工程系碩士班 === 90 === Taiwan, as bound by its unique geography and lack of natural resources, is noted for the high-tech electronics industry that has been developed at an extremely high density to revolutionize the speed and nature of changes to its environment, which drastically differs from that during the conventional brick-and-mortar industry era. As revealed in the survey findings concluded by government authorities in recent years, the estimated yearly output of local industrial waste has reached a staggering 2,350-plus tons per annual. The daily output of toxic industrial waste under the foregoing estimation would boom from 36 tons to 70 tons in the next decade. In light of the ever-increasing amount and composition complexity of the waste, any delay to an adequate planning would not only leave behind a worrying issue no less than sitting on a time bomb to the environment in Taiwan, but the processing cost alone would also be surging to an unmanageable magnitude.
Yet recycle and reuse of industrial waste based on the characteristics and contents of the waste represent a highly feasible alternative means other than end user disposal. This study focused on waste solvents generated by the semiconductor industry in Taiwan. The current status of the treatment of high concentration waste solvent was surveyed and analyzed. The scope of this study is to examine a variety of process techniques and related environmental management issues. Experiments were also conducted on the recycling of low concentration waste solvent by active carbon. Active carbon is commonly used in the semiconductor industry for waste solvent treatment. In conjunction to this, virgin and regenerated active carbon is used to examine the sorption effects toward iso-propoyl alcohol (IPA),by taking into account of the operation parameters such as IPA concentration, pH and temperatures. Experimental results show that active carbon can recover IPA effectively. The results of this study serve to provide the base for the environmental management of high concentration waste solvent as well as the basic data for the recycling of low concentration waste solvent.
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