本論文是以軟性銅箔基板產業為例，廢水來源為含銅電鍍液清洗水，低濃度清洗廢水使用RO (reverese osmosis)回收處理系統，處理成效並不理想，因而廢水會改排至廢水處理系統，不僅增加處理成本也造成環境的危害，本研究是於回收處理系統前增設離子交換樹脂單元，進行含銅清洗廢水離子交換處理，預先去除水中過多的銅離子，以降低回收系統進流水含銅濃度，使製程清洗廢水順利而穩定的回收再利用，強化整套回收系統的穩定性。 實驗結果顯示水質pH3，流量13.5 SV (SV：specific volume)樹脂的交換當量1.76 eq/L-R，換算除銅能力達55.5 g-Cu/L-樹脂，廢水銅離子去除率可達99 %。與原處理方式操作成本比較，可降低費用達18 %。樹脂再生液濃度為14.5 g/L，以回收進流水容許濃度12 mg/L計算，濃縮倍數可達1160倍，樹脂在長期使用下，樹脂的離子交換能力並無下降。 回收水系統增設離子交換樹脂，可讓製程清洗廢水銅離子濃度降低且可穩定操作，並減少污泥的產生量及廢水排放量，降低對環境造成的危害，處理水可回收再使用，證實於回收系統前增設離子交換樹脂單元，對於解決回收水處理系統不穩定是可行的，也兼顧了環境保護與資源循環利用的效益。 ;Low concentration electroplating wastewater comes from washing processes in soft copper foil substrate industry. For reclamation of such water, the recovery is usually not good because the influent copper concentration varies significantly, which results in high treatment cost and possible pollution to the aquatic environment. In this study, ion exchange was proposed to remove copper before reverse osmosis (RO) to stabilize the water quality for water reclamation system. The results showed that when solution pH was 3 and the specific volume was 13.5, the exchange ability of the ion exchange resin was 1.76 eq/L-R; that is, 55.5 g-Cu/L- resin. The removal efficiency of copper was up to 99%. Compared to the traditional treatment (e.g., chemical precipitation), the cost was 18% cheaper. The regeneration of resin gave copper concentration of 14.5 g/L, which was about 1160 times of the required influent copper concentration (i.e., 12 mg/L). The long-term test also showed that the exchange ability of the resin used in this work was not degraded. Incorporation of ion exchange in water reuse system can effectively lower the copper concentration and, thus, lead to stable operation of the RO. The reductions of sludge and wastewater lessen the pollution of electroplating industry. Moreover, water reclamation from wastewater ease the pressure for water demands.