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Study on effect of sludge recirculation rate and carbon source on nitrogen removal in an anoxic-aerobic MBR system with sponges as biocarrier
Sludge recycle rate
|上傳時間: ||2018-01-11 11:43:28 (UTC+8)|
結果顯示，COD，NH4 + - N，TN的最高去除率為100%，100%和90.3%。本實驗碳源為醋酸鈉以及污泥迴流率在3Q時為最佳操作條。而實驗中的碳源以及污泥回流比的變化對於COD和NH4 + - N的去除率並沒有顯著的影響，但TN在去除率方面就有很顯著的提升，從中得知碳源跟污泥迴流率的變化對於TN的去除有著顯著的影響。
In the recent years, the development of wastewater treatment technology has been forcused on the remove efficiency of organic carbon and nutrients. The advantages of membrane bioreactor (MBR) include the small foot print, retain all of particulate COD, extained solid retaintion time for slow growing bacteria, the solid retaintion time and hydraulic retaintion time are independenly and etc. By this way the removal of organic carbon compounds and nutrients (nitrogen and phosphorus) can be occured simultaneously by additional the various configurations such as pre-denitrification MBR systems.
In this study, the effects of different carbon sources and recirculation rate were study by using laboratory-scale anoxic compacted with sponges followed by aerobic membrane bioreactor (A / O) system to remove carbon and nitrogen from synthetic DOmestic wastewater. The system was carried out for about 270 days with different run and without sludge wasting. To evaluate the effect of carbon sources and sludge recirculation rates on system performance to remove carbon and nitrogen, three different carbon sources (carbon sources, glucose, propionic acid, and acetic acid) and three different sludge recirculation (1Q, 2Q and 3Q) were used in run 1, 2, 3, 4 and 5, respectively.
The results showed that the highest removal rates of COD, NH4+ - N and TN were 100%, 100% and 90.3%. The experimental carbon source for the sodium acetate and sludge reflux rate at 3Q for the best operation of the article. The change of COD and NH4+ - N removal rate did not show the change of carbon source and sludge reflux ratio. However, TN showed a significant increase in removal rate, and the carbon source and sludge The change in reflux rate has a significant effect on the removal of TN.
|Appears in Collections:||[環境工程與科學系(所)] 博碩士論文|
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