Biofiltration of gasoline vapor by compost media

Namkoong, Wan; Park, Joonseok; VanderGheynst, Jean S.

doi:10.1016/s0269-7491(02)00223-3

Cited by 47 publications

(29 citation statements)

References 13 publications

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“…Yet only a few papers on the biofiltration of gasoline and other diverse hydrocarbon mixtures are available (Leson and Smith, 1997;Barton et al, 1997;Wright et al, 1997;Morales et al, 1998;Namkoong and Park, 2003;Namkoong and Park, 2004;Paca et al, 2007). Even fewer studies have tackled the interactions of aliphatic and more biodegradable aromatic compounds in their mixtures (Schindler and Friedl, 1995;Holubar et al, 1999;Lu et al, 2001;Kim, 2003;Hassan and Sorial, 2010;Halecky et al, 2012).…”

Section: Introductionmentioning

confidence: 99%

Biofiltration of gasoline and diesel aliphatic hydrocarbons

Halecky

Rousova

Páca

et al. 2015

Journal of the Air & Waste Management Association

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The ability of a biofilm to switch between the mixtures of mostly aromatic and aliphatic hydrocarbons was investigated to assess biofiltration efficiency and potential substrate interactions. A switch from gasoline, which consisted of both aliphatic and aromatic hydrocarbons, to a mixture of volatile diesel n-alkanes resulted in a significant increase in biofiltration efficiency, despite the lack of readily biodegradable aromatic hydrocarbons in the diesel mixture. This improved biofilter performance was shown to be the result of the presence of larger size (C 9 -C 12 ) linear alkanes in diesel, which turned out to be more degradable than their shorter-chain (C 6 -C 8 ) homologues in gasoline. The evidence obtained from both biofiltration-based and independent microbiological tests indicated that the rate was limited by biochemical reactions, with the inhibition of shorter chain alkane biodegradation by their larger size homologues as corroborated by a significant substrate specialization along the biofilter bed. These observations were explained by the lack of specific enzymes designed for the oxidation of short-chain alkanes as opposed to their longer carbon chain homologues.Implications: Biological removal of petroleum hydrocarbons from contaminated air has not become a widely used technology due to its low efficiency. This paper presents the analysis of this problem using bench-scale experiments and provides several reasons for the low biodegradation efficiency of gasoline. The results reported suggest that gasoline removal efficiency strongly depends on the substrate composition, with aromatic hydrocarbons being removed preferentially. The study also opens up a new perspective for the efficient biofiltration of diesel hydrocarbons as opposed to gasoline, as higher molecular weight n-alkanes of diesel were removed readily. By contrast, low-molecular-weight n-alkanes of gasoline turned out to be poor substrates for biofiltration, and the biological reasons for this phenomenon were suggested.

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Section: Introductionmentioning

confidence: 99%

Biofiltration of gasoline and diesel aliphatic hydrocarbons

Halecky

Rousova

Páca

et al. 2015

Journal of the Air & Waste Management Association

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“…Already commonly used for the control of odorant compounds [3], the application of this process has been recently extended to the control of volatile organic compounds (VOC) [4][5][6]. A screening of industrial VOC emissions reveals that, in most cases, effluents contain complex mixtures of VOC with different biodegradability and solubility [7][8][9][10]. Generally, a biofilter is a column filled with a porous and humid packing material inoculated with microorganisms able to degrade pollutants.…”

Section: Introductionmentioning

confidence: 99%

Biofiltration for the Treatment of Complex Mixtures of VOC – Influence of the Packing Material

Aizpuru

Khammar

Malhautier

et al. 2003

Acta Biotechnologica

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Currently air biofiltration is largely considered for the removal of Volatile Organic Compounds (VOC) from polluted airstreams. In order to select a suitable packing material for the treatment of VOC polluted air and better understand the influence of the packing material properties upon the removal efficiency, a mixture of eleven VOC was treated in two down-flow biofilter units packed with either peat or Granular Activated Carbon (GAC) and functioned under similar operating conditions for 92 days. Using the peat biofilter under steady-state conditions achieved a removal efficiency of 90% greater than the 80% achieved using the GAC filter. Moreover, in both cases, a stratification of the abatement along the column was observed but it differed according to the type of the packing material used. For the peat biofilter, elimination of oxygenated compounds occurred in the first 50 cm of the column, whereas aromatic and halogenated compounds were treated in the segments closer to the outlet. In contrast, with GAC,

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“…Smaller RE was obtained for a smaller retention time and longer residence times were more efficient for the biofiltration pollutant processes (Namkoong et al 2004). Namkoong et al (2003) reported ER around 80% of TPH during the study with compost media, with concentrations varying from 50 to 7800 mg.m -3 . Lu et al (2006) studied the degradation of up to 2 g.m -3 of gasoline with three microbes together, achieving the RE of 82%.…”

Section: Resultsmentioning

confidence: 97%