| Title: | "Comparative assessment of a biofilter, a biotrickling filter and a hollow fiber membrane bioreactor for odor treatment in wastewater treatment plants" |
| Author(s): | Lebrero R; Gondim AC; Perez R; Garcia-Encina PA; Munoz R; |
| Address: | "Department of Chemical Engineering and Environmental Technology, Escuela de Ingenierias Industriales, Sede Dr. Mergelina, University of Valladolid, Dr Mergelina s/n, 47011 Valladolid, Spain(1). Department of Chemical Engineering and Environmental Technology, Escuela de Ingenierias Industriales, Sede Dr. Mergelina, University of Valladolid, Dr Mergelina s/n, 47011 Valladolid, Spain(1). Electronic address: mutora@iq.uva.es" |
| DOI: | 10.1016/j.watres.2013.09.055 |
| ISSN/ISBN: | 1879-2448 (Electronic) 0043-1354 (Linking) |
| Abstract: | "A low abatement efficiency for the hydrophobic fraction of odorous emissions and a high footprint are often pointed out as the major drawbacks of conventional biotechnologies for odor treatment. In this work, two conventional biotechnologies (a compost-based biofilter, BF, and a biotrickling filter, BTF), and a hollow-fiber membrane bioreactor (HF-MBR) were comparatively evaluated in terms of odor abatement potential and pressure drop (DeltaP) at empty bed residence times (EBRTs) ranging from 4 to 84 s, during the treatment of methyl-mercaptan, toluene, alpha-pinene and hexane at trace level concentrations (0.75-4.9 mg m(-3)). High removal efficiencies (RE > 90% regardless of the air pollutant) were recorded in the BF at EBRTs >/= 8 s, although the high DeltaP across the packed bed limited its cost-effective operation to EBRTs > 19 s. A complete methyl-mercaptan, toluene and alpha-pinene removal was recorded in the BTF at EBRTs >/= 4 s and DeltaP lower than 33 mmH2O ( approximately 611 Pa mbed(-1)), whereas slightly lower REs were observed for hexane ( approximately 88%). The HF-MBR completely removed methyl-mercaptan and toluene at all EBRTs tested, but exhibited an unstable alpha-pinene removal performance as a result of biomass accumulation and a low hexane abatement efficiency. Thus, a periodical membrane-cleaning procedure was required to ensure a steady abatement performance. Finally, a high bacterial diversity was observed in the three bioreactors in spite of the low carbon source spectrum present in the air emission" |
| Keywords: | "Bacteria/growth & development Biodegradation, Environmental Bioreactors/*microbiology Denaturing Gradient Gel Electrophoresis Filtration/*instrumentation *Membranes, Artificial Molecular Sequence Data Odorants/*analysis Pressure Time Factors Volatile Orga;" |
| Notes: | "MedlineLebrero, Raquel Gondim, Ana Celina Perez, Rebeca Garcia-Encina, Pedro A Munoz, Raul eng Comparative Study England 2013/12/04 Water Res. 2014 Feb 1; 49:339-50. doi: 10.1016/j.watres.2013.09.055. Epub 2013 Oct 10" |
