کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6484111 | 169 | 2013 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Biological treatment of n-hexane and methanol in trickle bed air biofilters under acidic conditions
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موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
بیو مهندسی (مهندسی زیستی)
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
This study focuses on evaluating the degradation of n-hexane/methanol mixture in trickle-bed-air-biofilters (TBABs). Two different concentration ratios of methanol:n-hexane were evaluated (3:1) for TBAB “A” and (5:1) for TBAB “B”. Both TBABs were run and fed with nutrients buffered at pH 4 for encouraging the growth of fungi. The TBABs were loaded with pelletized diatomaceous earth support media and were run at an empty bed residence time of 120Â s. n-Hexane loading rates (LRs) ranged from 0.9 to 13.2Â g/m3Â h for both TBABs. The corresponding methanol LRs varied from 2.3 to 37.7Â g/m3Â h and from 4.6 to 64.5Â g/m3Â h for TBABs “A” and “B”, respectively. Experimental results have shown that the degradation of n-hexane in presence of methanol is enhanced for n-hexane LRs less than 10.6Â g/m3Â h as compared to previous study for sole-fed n-hexane, but for n-hexane LRs of 13.2Â g/m3Â h, the performance of TBABs in eliminating n-hexane depended on the methanol to n-hexane ratios. The impact was less severe for TBAB “A” (RE 85%) as compared to TBAB “B” (RE 72%). This is attributed to the high LRs of methanol in TBAB “B”. n-Hexane performance stability was another advantage attained.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Biochemical Engineering Journal - Volume 77, 15 August 2013, Pages 129-135
Journal: Biochemical Engineering Journal - Volume 77, 15 August 2013, Pages 129-135
نویسندگان
Abderrahman Zehraoui, Ashraf Aly Hassan, George A. Sorial,