The Study of Rotational Ultrafiltration System for Recovery of Spent Cutting Oil from Solar Photovoltaic Cell Manufacturing Process

10.6180/jase.2016.19.1.09

Chi-Yuan Shih；Sue-Huai Gau；Chi-Chang Kuo；Chang-Yun Huang；Sheng-Wei Kuo

Rotational Ultrafiltration ； Diethylene Glycol ； Recycle ； Silicon Sawing ； Cutting Oil

淡江理工學刊

19卷1期（2016 / 03 / 01）

75 - 82

英文

The main problems of recovery cutting oil from spent waste are high viscosity of cutting oil and high content of nano-size particle. This study combined an innovative rotational circular-plate ultrafiltration membrane filter with a scraping device to recycle the cutting oil and remove particles fouling cake attached to the membrane surface, and was able to maintain cutting oil filtrate flux above 6.65 l/m^2/hr. Also, the proposed process is the practical solution for materials separation between highly viscosity liquid and fine particles even nano-size. The results show the filtrate of ultrafiltration membrane could meet the reuse requirements of less than 0.03% solid content. Analysis of blended oil characteristics under different blending ratios was conducted, showing the optimum blending ratio of recycled oil to new cutting oil was 6:4. The final production cost can be reduced over 27.4%. The process can achieve waste reuse ratio of greater than 77.2%.