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5.1 結論

本研究之重點為將自行合成之二氧化鈦凝膠與商用薄膜複合,並且加入 照光條件,利用生物污泥與模組系統進行過濾實驗,進而比較改質前後之 薄膜延緩通量衰減之能力,以及加入光照能否增進複合薄膜抗垢之探討,

最後再觀察改質後之薄膜,其表面積垢物之特性分析。以下是本研究所得 之結論:

1. 改質後之 TiO2複合薄膜之清水通量會略低於原始薄膜,但加入光照 條件後,薄膜之親水性質更顯著,因而使 TiO2複合薄膜之清水通量 增加。

2. 搭配照光條件之 TiO2複合薄膜,其延緩通量衰減之能力優於未照光 之 TiO2複合薄膜,亦優於未經 TiO2改質之原始薄膜。

3. 於多次重複試驗中,每次過濾皆照光之 TiO2複合薄膜,具有最佳延 緩通量衰減之能力。

4. 在長時間之過濾試驗中,配合光照條件的 TiO2複合薄膜,其滲透率 比原始薄膜之值高,而且通量衰減之趨勢也較緩慢。

5. 由 CLSM 之結果得知,加入照光條件之後,有效地使膜表面之活體 細胞失去活性;而改質後之薄膜搭配照光條件後,可增加物理清洗 之效果。

5.2 建議

本研究所選擇使用之薄膜皆為親水性薄膜,對於常用之疏水性薄膜,如:

PVDF 薄膜、PS 薄膜等,尚未進行試驗,其原因是由於二氧化鈦凝膠為液 體狀態,其複合之方式為將薄膜直接浸泡於凝膠中,若對象為疏水性薄膜,

則必須考慮使用不同之合成方法。所以這個部分是很值得繼續研究下去;

此外,在生物膜之成份鑑定與積垢物之探討,由於時間之限制,未能更深 入更周延地討論其現象,希望後續之研究能補強這一方面之不足。

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