| Title: | Effect of the continuous addition of ozone on biomass clogging control in a biofilter treating ethyl acetate vapors |
| Author(s): | Covarrubias-Garcia I; Aizpuru A; Arriaga S; |
| Address: | "Division de Ciencias Ambientales, Instituto Potosino de Investigacion Cientifica y Tecnologica (IPICyT), San Luis Potosi, Mexico. Electronic address: itzel.covarrubias@ipicyt.edu.mx. Universidad del Mar, Campus Puerto Angel, Oaxaca, Mexico. Electronic address: aitor@angel.umar.mx. Division de Ciencias Ambientales, Instituto Potosino de Investigacion Cientifica y Tecnologica (IPICyT), San Luis Potosi, Mexico. Electronic address: sonia.arriaga@ipicyt.edu.mx" |
| DOI: | 10.1016/j.scitotenv.2017.01.031 |
| ISSN/ISBN: | 1879-1026 (Electronic) 0048-9697 (Linking) |
| Abstract: | "Biofiltration systems have been recognized as a cost-effective and environmentally friendly control technique for volatile organic compounds (VOC) removal. However, the long-term operation of biofilters causes biomass accumulation, and thus the occurrence of bed clogging, leading to a major decrease in biofilter performance. Control methods have been carried out in order to solve clogging problems, including backwashing, bed stirring, modification of flow patterns, predation, starvation and others. Ozone (O(3)) has been used in biofiltration systems at low concentrations to control the excess of biomass. It is worth mentioning that all these biofiltration studies involving O(3) treated recalcitrant pollutants such as chlorobenzene, formaldehyde and toluene, which do not produce enough biomass to effectively prove clogging prevention. Thus, this study evaluated the effect of the continuous addition of O(3) as a chemical oxidant at a very low concentration (90ppb(v)) as a practical solution to overcoming clogging in a process of biofiltration of ethyl acetate (EA), a readily degradable molecule. The maximum elimination capacities achieved ranged from 200 to 120gm(-3)h(-1), with and without O(3), respectively. The biomass concentrations in these systems ranged from 23.3-180.1 to 43.31-288.46mg(biomass)g(perlite)(-1) with and without O(3) addition, respectively. Based on the results, it was concluded that the continuous addition of O(3) could be an attractive solution to improving biofilter performance and extending the lifetime of the filter bed" |
| Keywords: | "Acetates/*chemistry Biodegradation, Environmental *Biomass *Filtration Ozone/*chemistry Biofilter Biomass Clogging Ethyl acetate Ozone;" |
| Notes: | "MedlineCovarrubias-Garcia, Itzel Aizpuru, Aitor Arriaga, Sonia eng Netherlands 2017/01/24 Sci Total Environ. 2017 Apr 15; 584-585:469-475. doi: 10.1016/j.scitotenv.2017.01.031. Epub 2017 Jan 20" |
