| Title: | Influence of ground tire rubber on the transient loading response of a peat biofilter |
| Author(s): | Alvarez-Hornos FJ; Izquierdo M; Martinez-Soria V; Penya-Roja JM; Sempere F; Gabaldon C; |
| Address: | "Department of Chemical Engineering, University of Valencia, Dr. Moliner 50, 46100 Burjassot, Spain" |
| DOI: | 10.1016/j.jenvman.2011.03.045 |
| ISSN/ISBN: | 1095-8630 (Electronic) 0301-4797 (Linking) |
| Abstract: | "The effect of using ground tire rubber (GTR) as an adsorptive material in the removal of a 2:1:1 weight mixture of n-butyl acetate, toluene and m-xylene by using a peat biofilter under different intermittent conditions was investigated. The performance of two identical size biofilters, one packed with fibrous peat alone and the other with a 3:1 (vol) fibrous peat and GTR mixture, was examined for a period of four months. Partition coefficients of both materials were measured. Values of 53, 118 and 402 L kg(-1) were determined for n-butyl acetate, toluene and m-xylene in peat, respectively; and values of 40, 609 and 3035 L kg(-1) were measured for the same compounds in GTR. Intermittent load feeding of 16 h per day, 5 days per week working at an EBRT of 60 s and an inlet VOC concentration of 0.3 g C m(-1), resulted in removal efficiencies higher than 90% for both biofilters, indicating that the addition of GTR did not adversely affect the behavior of the bioreactor. Full removal of n-butyl acetate was obtained for both biofilters. GTR improved the removal of the aromatics in the first part of the biofilter, facilitating lower penetration of the toluene and m-xylene into the bed. A 31-day starvation period was applied and intermittent operation subsequently restarted. In both biofilters, high removal efficiencies after a re-acclimation period of two days were achieved. A shock loading test related to 1-h peaks of three- and four-fold increases in its baseline concentration (0.30 g C m(-3)) was applied in both biofilters. For the biofilter packed with the peat and GTR mixture, attenuation greater than 60% was observed in the maximum outlet concentration when compared to the biofilter packed with peat alone" |
| Keywords: | "Acetates/analysis Adsorption Air Pollutants/*analysis Air Pollution/*prevention & control Chromatography, Gas Filtration/*methods Rubber/*chemistry Soil/*chemistry Toluene/analysis Volatile Organic Compounds/*analysis Xylenes/analysis;" |
| Notes: | "MedlineAlvarez-Hornos, F J Izquierdo, M Martinez-Soria, V Penya-Roja, J M Sempere, F Gabaldon, C eng Research Support, Non-U.S. Gov't England 2011/05/03 J Environ Manage. 2011 Aug; 92(8):1978-85. doi: 10.1016/j.jenvman.2011.03.045. Epub 2011 Apr 29" |
