| Title: | Effect of methanol on the biofiltration of n-hexane |
| Author(s): | Zehraoui A; Hassan AA; Sorial GA; |
| Address: | "School of Energy, Environmental, Biological and Medical Engineering, College of Engineering and Applied Science, University of Cincinnati, Cincinnati, OH 45221-0012, USA. zehraoan@mail.uc.edu" |
| DOI: | 10.1016/j.jhazmat.2012.03.075 |
| ISSN/ISBN: | 1873-3336 (Electronic) 0304-3894 (Linking) |
| Abstract: | "This study investigated the removal of recalcitrant compounds in the presence of a hydrophilic compound. n-Hexane is used as a model compound to represent hydrophobic compounds. Methanol has been introduced in mixture with n-hexane in order to increase the bioavailability of n-hexane in trickle-bed-air-biofilters (TBABs). The mixing ratios investigated were: 70% methanol:30% n-hexane, and 80% methanol:20% n-hexane by volume. n-Hexane loading rates (LRs) ranged from 0.9 to 13.2 g m(-3) h(-1). Methanol LRs varied from 4.6 to 64.5 g m(-3) h(-1) and from 2.3 to 45.2 g m(-3) h(-1) depending upon the mixing ratio used. Biofilter performance, effect of mixing ratios of methanol to n-hexane, removal profile along biofilter depth, COD/nitrogen consumption and CO(2) production were studied under continuous loading operation conditions. Results have shown that the degradation of n-hexane is significantly enhanced by the presence of methanol for n-hexane LRs less than 13.2 g m(-3) h(-1). For n-hexane LR greater than 13.2 g m(-3) h(-1), even though methanol had impacted n-hexane biodegradation, its removal efficiency was higher than our previous study for biodegradation of n-hexane alone, in presence of surfactant, or in presence of benzene. On the other hand, the degradation of methanol was not impacted by the presence of n-hexane" |
| Keywords: | "Biodegradation, Environmental Chromatography, Gas Filtration/*methods Hexanes/*isolation & purification Methanol/*chemistry Nitrogen/chemistry Volatile Organic Compounds/isolation & purification;" |
| Notes: | "MedlineZehraoui, Abderrahman Hassan, Ashraf Aly Sorial, George A eng Research Support, U.S. Gov't, Non-P.H.S. Netherlands 2012/04/21 J Hazard Mater. 2012 Jun 15; 219-220:176-82. doi: 10.1016/j.jhazmat.2012.03.075. Epub 2012 Apr 4" |
