家用型逆滲透濾芯最適回收率參數設計之研究

逆滲透RO膜是淨水處理設備中的主要元件。RO膜的過濾效果達到90%以上，但水中雜質會沉積在RO膜的膜面上，導致膜面產生阻塞現象。而且回收率越高會使的廢水端雜質濃度也越高，進而使RO膜面越容易阻塞而使產水率降低。因此在製造純水過程中需透過廢水排放機制調整回收率來使廢水端濃度降低。由於各地水質的不同，在使用逆滲透RO膜淨水系統時，應依各地水質找出最適化的回收率參數，以使RO膜在不降低使用壽命下，能減少廢水排放量以降低水資源浪費。本研究利用多元迴歸分析法進行相關實驗，並找出最適的回收率參數。研究結果顯示，當逆滲透RO膜使用在原水質總溶解固體含量300ppm以下之水質可在不影響衰退情況下將回收率從現況的25%提高至32%-38%。本研究也推估在各種不同的水質下的最佳回收率估計值。本研究的結果不僅可使前置濾芯的使用壽命延長，並可節省大量的廢水排放量。對企業的產品開發以及家戶的用水成本皆可獲致莫大的助益。

關鍵字

逆滲透RO膜；阻塞；回收率；多元迴歸分析法；總溶解固體

並列摘要

Reverse osmosis (RO) membrane is the main component in water purification equipment. The filtration effect of RO membranes is mostly above 90%, but impurities in the water will deposit on the surface of the RO membrane, resulting in clogging of the membrane surface. Moreover, the higher the recovery rate, the higher the impurity concentration, which makes the RO membrane surface easier to block and reduces the water production rate. Therefore, the concentration of waste water must be reduced by adjusting the recovery rate during the water production process. Since the water quality varies from place to place, the optimal recovery rate parameters should be found according to the water quality of each place, so as to reduce the discharge of wastewater without reducing the service life of the RO membrane. In this study, multiple regression analysis was used to conduct relevant experiments to find the optimal recovery rate parameters. The results of the study show that when the RO membrane is used in water with a total dissolved solids content of less than 300 ppm, the recovery rate can be increased from 25% to 32% -38% without affecting the decline of the RO membrane. This study also estimates the optimal recovery rate under various water qualities. The results of this study not only extend the service life of the RO filter, but also save a lot of wastewater discharge. It can greatly benefit the company's product development and household water consumption costs.