| Title | Evaluation on the benefit of practically operating reverse osmosis system in the factory: taking the recycle of KI solution and water of the screen polarizing plate as an example |
|---|---|
| ID_Doc | 14554 |
| Authors | Tseng, SF; Lo, CM; Hung, CH |
| Title | Evaluation on the benefit of practically operating reverse osmosis system in the factory: taking the recycle of KI solution and water of the screen polarizing plate as an example |
| Year | 2021 |
| Published | Water Reuse, 11, 3 |
| Abstract | In recent years, with the advocacy of circular economy and the rising awareness of environmental protection, energy saving, water saving and carbon reduction have become an important topic for discussion today. The high-tech semiconductor, photoelectric, solar and other electronic industries involve high energy and water consumption. In addition to responding to the energy saving, water saving and carbon reduction, one of the main purposes of this system development is to reduce the use of materials and make the process chemicals reusable. In the practical factory operation, a large amount of water is used in the polarization process, and the wastewater generated in etching and pickling is discharged continuously. In order to recycle the water discharging from the manufacturing process, the reverse osmosis membrane system (RO membrane system) is often used for wastewater recycling. In this study, the KI waste liquid discharging from the process of a polarizing plate factory was concentrated with anti-fouling RO membrane; the quantity and arrangement of RO system membranes were simulated and designed with software; and the results, such as water volumes and pressures of inflow and outflow water for the membrane, changes of membrane pressure difference (Delta P), changes of permeating water quality, chemical cleaning frequency and water collection time, were discussed and the optimal parameters of RO membrane, such as the best water collection volume and time, chemical cleaning frequency, best concentration, time and temperature matching with cleaning in process (CIP) were inferred so as to improve the stability of RO membrane system, enable RO permeating water to enter the water purifying system for reuse, reduce the treatment cost of wastewater recycle and improve the permeating water output efficiency of treatment equipment, which accommodating effective utilization of water resources and economic benefits, leading to sustainable development of the industry. |
| https://iwaponline.com/jwrd/article-pdf/11/3/329/930252/jwrd0110329.pdf |
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