5-1 結論
1. 本研究以沉浸式 MBR 系統處理高科技業低 C/N 廢水，顯示在不同 SRT (12、20、30 天) 下皆可有效處理廢水中之污染物 (BOD5、COD、NH4+ 等)，其中又以 SRT 控制在 20 天時之處理效率最高 (分別可達 98、91、
98%)，而廢水中之 SS 經薄膜過濾後皆可達濁度小於 1 NTU 之出流。
2. 薄膜之積垢速率受反應槽中 EPS 之總量影響頗深，隨反應槽中胞外物 質增加，薄膜之積垢越嚴重。以 mg EPS/g MLVSS 為單位，僅顯示不 同 SRT 下微生物之生長狀態及單位胞外物質產量，無法切確說明其與 積垢速率間之關係。
3. 當 SRT 由 12 天延長至 20 天時，反應槽中單位微生物所產之 EPS 濃度 上升，然至 SRT 30 天時卻降低，推測與反應槽中微生物之生長型態有 關，此外亦可能因反應槽中可用物質降低，而被微生物再利用所 導致。
4. 隨 SRT 增長，反應槽中 EPS 總量上升，導致積垢速率上升；而 EPS 之 P/C 比隨 SRT 增加而上升，推測亦為使積垢速率快速上升之原因之一 。 5. 無論 EPS 以何種單位進行相關性分析，其結果相似：於短 SRT 時 (12
天)，積垢速率受附著性 EPS 之影響較大；而當 SRT 延長 (20、30 天)，
則改以反應槽中溶解性 EPS 對薄膜積垢之影響較大，推測此一現象與 反應槽中微生物之生長、代謝或膠羽型態有關。。
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5-2 建議
1. 本 研 究僅 採 單 一 好 氧 單 元進 行 ， 無 脫 硝 作 用， 為 因 應 未 來 放 流水 之 總 氮限制，可增加厭氧或兼氧單元，以了藉 科技業之低 C/N 廢水對脫硝 作用是否有所限制；亦可對去除廢水中之磷做探討。
2. 可 針 對 不 同 SRT 下 之 污 泥 粒 徑 做 分 析 ， 以 了 解 污 泥 粒 徑 與 反 應 槽 中 EPS 含量與膜積垢間之關係。
3. 可分析不同 SRT 下膜表面之積垢物成分，以了解膜面積垢物與反應槽 中 EPS 之組成是否相同。
4. 本 研 究因 模 廠 配 置 問 題 ，故 以 自 來 水 進 行 反洗 ， 未 來 模 廠 之 設計 應 使 用薄膜出流水進行反洗，避免自來水中之不明物質影響薄膜之操作。
5. 影響薄膜積垢之因子繁多，因高科技業之廢水含大量 TDS，故未來可 加測出流水中之 TDS，以釐清 TDS 對薄膜積垢之影響。此外，亦可檢 測出流水中之 EPS 之含量，以了解 EPS 與薄膜及積垢間之關係。
6. 蛋 白 質種 類 繁 多 ， 其 帶 電性 不 一 ， 雖 文 獻 中指 出 蛋 白 質 帶 正 電， 但 不 一定代表本研究反應槽中之蛋白質電性，可針對反應槽中蛋白質做定 性與定量之分析，以證實蛋白質對積垢之影響 ，此外亦可針對污泥之 親疏水性與薄膜間之交互關係做進一步之討論 。
7. 未 來 可使 用 不 同 進 流 水 質， 比 較 反 應 槽 中 之微 生 物 種 類 、 型 態、 胞 外 聚合物產量等，加以了解微生物之菌相對薄膜 積垢之影響。
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