結論

1. 原水濁度越高，其pH、鹼度與導電度有下降的趨勢，且濁度升高 則其顆粒表面ζ值會降低。

2. 最適加藥量大多發生在快混後顆粒ζ值偏正的劑量，而此時的ζ值依 原水水質及顆粒特性的狀況不同，因此有所差異，但大略落在2~6 mV之間，此時的混凝機制以沉澱掃除為主；一般濁度原水之快混 後pH以接近中性偏鹼時的混凝效果最好，混凝機制同樣依靠沉澱 掃除。

3. 原水參數當中以鹼度影響最適加藥量最為明顯。在原水低濁度時，

最適加藥量與原水鹼度呈現正相關；在原水高濁度時，最適加藥 量與鹼度呈現負相關。

第六章 建議

因最適加藥量與天然原水鹼度的相關性不低，所以可嘗試配製濁度 相同，但控制鹼度條件的人工原水來進行試驗，進一步探討最適加藥 量與鹼度的相關性。

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