近年?全球氣候變遷，造成降雨過度集中，台灣地區目前面?水資源?足。傳統生物程序處?廢水雖然是成熟穩定技術，但其受限於?澱池體積、有機負荷、污?產?和污???性等因素的影響。為了突破傳統限制開始採用薄膜生物反應器(Membrane Bio-Reactor, MBR)，以利水回收再利用。MBR是結合薄膜技術與傳統活性污?程序，薄膜在長時間操作下，膜表面常有會有汙物及生物膜附著，產生積垢而導致通量下降。 本研究主要探討薄膜積垢的控制，分為兩部分1.延緩積垢槽體設計：活性汙泥槽與薄膜過濾之間加入傾斜板沉澱，沉澱過後的上層液由於SS降低，再由薄膜過濾，可減少薄膜積垢，提高出水量，並延長薄膜使用壽命；2.超音波線上去除積垢：將超音波震盪子設備直接置放於MBR中，在薄膜過濾的情況下，同時進行間歇式線上超音波震盪，探討超音波對於去除薄膜積垢之效應。本研究設計的新型MBR結合傾斜板與傳統沉浸式MBR，如預期的能將降低SS濃度，減緩薄膜積垢。沉浸式MBR使用使超音波線上清洗後通量雖些許回復，但薄膜形成積垢時間變短。本研究由於實驗室規模的小型模場，原始設計和操作條件受到了限制，但對於往後應用於實際的廢水處理廠可提供借鏡。 Due to the recent climate changes, precipitation patterns vary significantly in Taiwan, leading to the problem of water deficiency. The conventional biological process for wastewater treatment is stable and widely used. However, the technique is limited by the sedimentation tank volume, organic loadings, sludge productions, and sludge precipitations. Membrane Bioreactors, the combination of membrane technology and conventional activated sludge processes, can overcome those difficulties. The permeate fluxes decrease due to membrane fouling that is caused by the high concentration of activated sludge contacting the membrane surface. This research, investigated the membrane fouling control, has two parts, which are 1. to design a novel MBR to reduce the membrane fouling by introducing inclined plate settlers and 2. to clean membrane in line with ultrasound. The novel MBR can reduce SS concentration in water that contacts the membrane. Thus, it can reduce the membrane fouling and increase the permeate flux. The ultrasound can clean the membrane in line, but this might damage the membrane. This research was in a lab scale which might be useful for the design of a real plant to reduce the membrane fouling and increase the permeate flux.
