| 摘要: | 目前薄膜過濾技術在淨水產業中已廣泛運用，其優點相較於其他處理方法可同時去除多種汙染物。然而薄膜處理最大問題在於積垢阻塞，常見的薄膜清理技術為液體反洗或化學藥劑清洗；但液體反沖洗效果有限，使用化學藥劑亦會衍生出一些化學廢棄物問題，不僅降低操作效率，也使操作成本提高。本研究將MF薄膜過濾有機物並使膜表面上形成有機物之阻塞，再以氣洗、超音波、氣洗+超音波、超音波+氣洗等四種清洗方式清洗膜上有機物之阻塞，並探討四種清洗方式對於MF薄膜清洗效果，相互比較回復率、通量變化、膜阻抗之差別。研究結果顯示，MF薄膜上有機物在經超音波處理後通量有明顯提升，可以降低薄膜阻塞程度；氣洗隨操作時間的增加，使得通量回復慢慢下降，清洗效果略顯不佳。此外，過薄膜通量與通量回復率隨著阻塞機制不同而異，清洗的效果也異不同。
Currently membrane filtration technology in the water industry has been widely used, its advantages compared to other treatment methods can simultaneously remove a variety of contaminants. However, the biggest problem is that the film processing fouling obstruction, a common technique of removing the liquid membrane backwashing or chemical cleaning agents; but liquid backwash effect is limited, the use of chemicals will be derived from a number of chemical waste problems, not only reduce operating efficiency, but also the operating costs.This research will enable MF membrane filtration membrane formed on the surface organic organics blocked, then gas washing, ultrasonic, ultrasonic gas washing, ultrasonic cleaning methods other four gas washing cleaning membrane organics obstruction, and to explore four kinds MF membrane cleaning method for cleaning effect, response rates compared with each other, flux, membrane impedance difference.The results show that, MF film by ultrasonic treatment in organic matter flux has improved significantly, the film can reduce the degree of obstruction; gas washing with the operating time increases, making the flux back slowly declining, the cleaning effect is slightly poor. In addition, through the membrane flux and flux recovery rate varies with the blocking mechanism, the effect of different cleaning different. |
