以連續式接觸曝氣生物反應槽處理合正烷烴的除油劑之研究

本研究以生物處理法對某石油公司所用除油劑中之正院煜進行生物降解之研究，因為利用生物處理廢水污染物是最經濟有效的處理方式，近年來，以旋轉生物種法或填充床形式的固定模式生物反應器由於其優越的處理效率、高降解能力與穩定性而重獲業界青睞。在本研究中應用一組自行架設的連續式接觸曝氣反應槽以處理含正烷烴的除油劑，並藉由另外一組無微生物的對照組來比較實驗組之生物降解效率，並探討微生物對具有不同碳數(C_(10）～C_(13))之正烷烴混合物其生物降解的差異性。由本研究之實驗結果得失同1 )含有微生物之實驗組對正院烷烴合物有相當明顯之生物降解效率；(2)此微生物喜好從碳數較低之正烷烴物質開始降解(降解速率：C_(10)＞C_(11)＞C_(12)＞C_(13))；(3)若進料速率愈慢，表示在反應器中水力停留時間愈長，其生物降解效率愈好。

關鍵字

生物降解；除油劑；連續接觸曝氣生物反應槽；正烷烴

並列摘要

The objective of this study is to investigate the n-alkanes biodegradation processes in oil dispersant supplied from a petroleum company by applying the bioreactor system. Over the pass years, it is apparently that the biological degradation of wastewater is known as the most economical and effective procedure for wastewater treatment. Recently, fixed film bioreactors such as rotating disks or packed beds are popular with great efficiency and stability, especially high degree of biodegradation is desired. A newdesigned bioreactor system with continuous contact aeration for the treatment of n-alkanes contented oil dispersant was developed in this paper in order to investigate the biodegradation procedure. The experimental results indicated that (1)An evident increase in the biodegradation efficiency was observed as compared with no microorganism added. (2)The n-alkane with the lower carbon number has a larger biodegradation rate. (3)The biodegradation rate increases with the decrease in influent rate due to the increase of the hydraulic retention time in the bioreactor system. In the future, this bioreactor system with continuous contact aeration would be also utilized as the tool of the Biodegradation for school laboratory wastewater treatment of organic solvents.