Please use this identifier to cite or link to this item: http://hdl.handle.net/11455/5527
標題: 以上流式厭氧污泥床處理四氯乙烯之研究
作者: 陳家政
關鍵字: UASB;上流式厭氧污泥床;PCE;upflow velocity;Dehalococcoides;molasses;HRT;四氯乙烯;上升流速;脫鹵球菌;糖蜜;水力停留時間
出版社: 環境工程學系
摘要: 
本研究之主要目的分為兩個部分,首先,將 UASB 的上升流速
分別控制在3、1.5、0.5、0.25 m/hr,探討不同的上升流速對UASB
處理四氯乙烯的去除效率之影響;接著探討以甲醇和糖蜜做為主要基
質,不同的基質對UASB 處理四氯乙烯之效應。
實驗結果顯示上升流速控制在3 、1.5、0.5 及0.25 m/hr 時,四
氯乙烯的生物性去除率分別為32 %、17 %、19 %及26 %,較高的上
升流速可提供良好的攪拌和較好的四氯乙烯與污泥接觸,使得四氯乙
烯的生物性去除率提高(32 %)。
基質效應實驗顯示,分別添加甲醇和糖蜜做為主要基質,當水力
停留時間由1 天延長到4 天,四氯乙烯的生物性去除率分別由34 %
和63 % 增加到53 %和84 %,而後水力停留時間維持4 天,將上升
流速由1 m/hr 提高至3 m/hr,四氯乙烯的生物性去除率又分別增加至
60 % 和95 %,顯示較長的水力停留時間和較高的上升流速有助於四
氯乙烯的生物性降解。基質的選擇是以糖蜜做為主要基質時可以獲得
較佳的四氯乙烯生物去除率(95 %),實驗結果顯示當主要基質由甲
醇改為糖蜜時,四氯乙烯生物去除率可增加29 % ~ 35 %,延長水力
停留時間和提高上升流速下,四氯乙烯的生物去除率分別只有增加
19 % ~ 21 % 和7 % ~ 11 %,顯示本系統中基質條件對四氯乙烯生物
降解的影響大於水力條件。本研究中UASB 反應器處理四氯乙烯的
最適操作條件為添加糖蜜為主要基質、水力停留時間維持在4 天及上
升流速控制在3 m/hr。
在Dehalococcoides spp. 的監測結果顯示本系統中含有
Dehalococcoides spp.,在顆粒性污泥中成網狀排列分佈,在較好的四
氯乙烯生物性去除率下,可以觀察到較多量的Dehalococcoides spp.。

The objective of this study is to discuss the PCE degradation using an upflow anaerobic sludge bed reactor at different upflow velocity ( Vup,e.g. 3, 1.5, 0.5, 0.25 m/hr ) and to discuss the effect of the addition of methanol or molasses as the primary substrate on the PCE removal.
The results showed that PCE removals were 32 %, 17 %, 19 % and
26 % at Vup of 3, 1.5, 0.5, 0.25 m/hr respectively. A better PCE removal efficiency was obtained at higher Vup. This result indicated that better mixing conditions and better contact between PCE and sludge.
The results of substrate test showed that the addition of methanol or molasses as the primary substrate could increase the PCE removal from 34 % and 63 % to 53 % and 84 %, respectively, when HRT extend from 1 to 4 day. Then, keeping HRT on 4 days and increasing Vup from 1 to 3 m/hr, the PCE removal was enhanced from 60 % to 95 %. It indicated
that higher HRT and Vup were helpful on the PCE biodegradation. The optimum primary substrate was molasses which enhanced the PCE removal ( up to 95 % ). The PCE removal efficiency was about 29 % to 35 % when the primary substrate was methanol. However, an increase in HRT from 1 day to 4 days increased the PCE removal efficiency from 19 % to 21 % , respectively. An increase in Vup from 1 m/hr to 3 m/hr increased the PCE removal efficiency from 7 % to 11 %, respectively. It indicated that the substrate effect played the major role on the PCE
removal, but not the hydraulic condition in the UASB system. In this study, the addition of molasses as the primary substrate of the HRT of 4 days and at Vup of 3 m/hr was the best operation condition for this UASB system.
The presence of Dehalococcoides spp. within the anaerobic granular sludge showed that Dehalococcoides spp. indeed exist in this UASB system.
URI: http://hdl.handle.net/11455/5527
Appears in Collections:環境工程學系所

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