| Summary: | 碩士 === 南台科技大學 === 高階主管企管碩士班 === 97 === With the development in the high-tech industry such as semiconductor and TFT-LCD industry, using highly pure water to remove the surface pollutant is a very important procedure. In the trend of size maximization and the production skill improvement, the cost of the industry water is increasing sharply. Also created relatively overall wastewater disposal expense increase. In sewage sewer working cost graduation aspect, Southern Taiwan Science Park is originally higher than the Hsinchu Science Park expense. Exclude the factor that different campus charge different tariff, this research enters the discussion of waste water working cost by a semiconductor factory U Corporation at Southern Taiwan Science Park. Because in U Corporation waste water chemical oxygen demand and the suspended solid habit density maintains in the first level of distance. How therefore to reduce the volume of contaminated water waste effectively, then reduces the overall waste water expense, becomes the most important topic in this research.
The research method is using the procedure of achieving task QC Story, as the main shaft to develop a process to solve the subject problem. Taking U Company’s waste water system as an example, under the condition that quality of waste water is in control, we try to verify that the suggested process causes the waste water withdrawal to drop largely then achieves reduces waste and the overall waste water expense cost down. The core steps are as follow:
In the task clarification stage, it is to select the suitable QC tools to analyze and then get the 4 main findings in the research: (1) Reclaim water surplus overflow (2) Ultra Pure Water pretreated System SF & AC Rinse Water is not reclaim(3) Station Idle overall drain(4)2B3T service time is fixed.
In the most suitable implementation stage, according to the experiment record and using regression analysis, to establish reasonable resin service cycle time hypothesis model as the operation basis dealing with different piped water quality.
Four topic sum totals may save sewage date withdrawal 285.6 CMD for the U company. Surpassed the research far initially the preinstall goal: Reduced date withdrawal 100 CMD. If does take Republic of China 97 year's waste water valuation unit price each ton 18.6 as the valuation datum, The sum total altogether approximately saves for 15.9 ten thousand/months, one year has nearly 200 ten thousand cost down.
Key word: COD, SS, Achieving task QC STORY, Regression analysis.
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