使用S-UF + RO過濾系統作為回收水過濾設備，依據測試，仍須加裝如砂濾及活性碳前處理設施，以降低S-UF + RO過濾系統之負荷，除了上述預先處理外，仍需依照進流水導電度適當調整產水及排水比例，以減低薄膜結垢(Fouling)之情形，如此，才可得到較佳之操作方式。 Abstract
The lack of water resources in 21st century will be the most serious consideration around the world. It is essential that all the centuries illustrate the positive attitude in development of water resources. Moreover, comparing to the current price of drinking water, the price of recycling water is still in much expensive level. Due to stable quality and quantity characteristics of sewage water, waste water recycle and reuse will be the future potential for development of local water supply sources, which also illustrates the future potential to replace the current water resources.
As mentioned, there is enormous potential for urban sewage water to recycle and reuse around all the countries in the world. However, it is essential to develop the relevant laws and thoughtful strategy, including the Reclaimed Water Act, suitable water quality and water usage standards, as well the residence acceptance. Therefore, the requirements of wastewater recycle and reuse should consider the tasks of wastewater quality, water treatment techniques and usage risk assessment.
This research was focused on the usage of the S-UF + RO filtration system as the water recovery technology after secondary treatment process. The experiment result indicated that sand filters and activated carbon pre-treatment facilities were needed to reduce the loading of S-UF + RO filtration system. Moreover, the appropriate adjustments in the ratio of water production and drainage based on wastewater conductivity were considered to reduce the membrane fouling problems, which were resulted to obtain the optimal operation conditions.