Comparative response of two organic biofilters treating ethylbenzene and toluene after prolonged exposure

Gallastegui, Gorka; Barona, Astrid; Gurtubay, L.; Ηλίας, Α.

doi:10.1016/j.psep.2011.11.006

Cited by 29 publications

(14 citation statements)

References 48 publications

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“…After this change, RE ranged between 97.7% and 99.9% and desorption was no longer observable. Figure 5 shows the comparison of toluene EC versus toluene IL obtained in this study and some data close to indoor air conditions from the literature (Moe and Li, 2005;Ondarts et al, 2010a;Tang and Hwang, 1997;Abumaizar et al, 1996;Mathur et al, 2007;Oh et al, 2009;Eldon et al, 2005;Delhoménie et al, 2002;Alvarez-Hornos et al, 2008;Lebrero et al, 2012;Gallastegui et al, 2013).…”

Section: Biofilter Treatmentsupporting

confidence: 74%

A hybrid biological process of indoor air treatment for toluene removal

Hort

Platel

Sochard

et al. 2014

Journal of the Air & Waste Management Association

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Bioprocesses, such as biofiltration, are commonly used to treat industrial effluents containing volatile organic compounds (VOCs) at low concentrations. Nevertheless, the use of biofiltration for indoor air pollution (IAP) treatment requires adjustments depending on specific indoor environments. Therefore, this study focuses on the convenience of a hybrid biological process for IAP treatment. A biofiltration reactor using a green waste compost was combined with an adsorption column filled with activated carbon (AC). This system treated a toluene-micropolluted effluent (concentration between 17 and 52 µg/m 3 ), exhibiting concentration peaks close to 733 µg/m 3 for a few hours per day. High removal efficiency was obtained despite changes in toluene inlet load (from 4.2 × 10 −3 to 0.20 g/m 3 /hr), which proves the hybrid system's effectiveness. In fact, during unexpected concentration changes, the efficiency of the biofilter is greatly decreased, but the adsorption column maintains the high efficiency of the entire process (removal efficiency [RE] close to 100%). Moreover, the adsorption column after biofiltration is able to deal with the problem of the emission of particles and/or microorganisms from the biofilter.Implications: Indoor air pollution is nowadays recognized as a major environmental and health issue. This original study investigates the performance of a hybrid biological process combining a biofilter and an adsorption column for removal of indoor VOCs, specifically toluene.

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Section: Biofilter Treatmentsupporting

confidence: 74%

A hybrid biological process of indoor air treatment for toluene removal

Hort

Platel

Sochard

et al. 2014

Journal of the Air & Waste Management Association

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“…However, while treating mixtures, interaction effects between pollutants can play an important role in both mass transfer and biodegradation steps of the biofiltration process leading to somewhat reduced removal efficiencies of the target pollutants (Gallastegui et al, 2013;McNevin and Barford, 2000). With the advent of various statistical and computational modeling procedures, biofilters can be optimized for their performances when mixture of VOCs is present in the contaminated air stream (Saravanan et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

Start-up, performance and optimization of a compost biofilter treating gas-phase mixture of benzene and toluene

Rene

Kar

Krishnan

et al. 2015

Bioresource Technology

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“…The trend of the micro-organisms at different layers under various ILRs was consistent with trend of RE and EC. According to G. Gallastegui et al (Gallastegui et al 2013), the microbial population and reaction capacity remained low at the lower layer, this was consistent with bacterium-B, however, was not consistent with the trends of the fungi and bacterium-A. In his study, the concentration of the contaminant could achieve to 8.72±0.78 g/m 3 , because that the lower layer have the highest microbial population.…”

Section: Introductionmentioning

confidence: 73%

Biofilter for treating toluene vapors: Performance evaluation and microbial counts behavior

Zhu

Luo

et al. 2016

Preprint

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A lab-scale biofilter packed with mixed packing materials was used for degradation of the toluene. Three gas flow rates, i.e. 0.1, 0.2 and 0.4 m 3 /h, were tested for inlet concentration ranging from 0.2 to 1.2 g/m 3 . Removal efficiencies ranging from 45.6 to 97.3% and elimination capacities ranging from 4.95 to 61.07 g/(m 3 h) were observed depending on the inlet loading rates. Maximum elimination capacity of 35.95 g/(m 3 h) occurred at inlet loading rate of 45.87 g/(m 3 h). The lowest layer always had highest elimination capacity. Carbon dioxide concentrations and the microbial cell counts for bio-degraders followed toluene elimination capacities. Results of this study indicated that mixed packing materials could be considered as a potential biofilter carrier, with low pressure drop (less than 84.9 Pa/m), for treating air streams containing VOCs.

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Comparative response of two organic biofilters treating ethylbenzene and toluene after prolonged exposure

Cited by 29 publications

References 48 publications

A hybrid biological process of indoor air treatment for toluene removal

A hybrid biological process of indoor air treatment for toluene removal

Start-up, performance and optimization of a compost biofilter treating gas-phase mixture of benzene and toluene

Biofilter for treating toluene vapors: Performance evaluation and microbial counts behavior

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