Determination of mass transfer coefficients for packing materials used in biofilters and biotrickling filters for air pollution control. 1. Experimental results

Kim, Seongyup; Deshusses, Marc A.

doi:10.1016/j.ces.2007.10.011

Cited by 94 publications

(68 citation statements)

References 22 publications

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“…This significant difference between the two loading patterns indicates that it is the residence time of hydrocarbons within the reactor (and, presumably, contact with the biofilm) that limits biofilter performance. This feature may indicate mass transfer limitations at low EBRT, as it often does in biofiltration (Kim and Deshusses, 2008). However, setting up the same loading at a lower residence time would also lead to lower substrate concentrations not only in the gas phase but also in the condensed phase, as a result of partitioning.…”

Section: Pollutant Switch From Gasoline To Diesel Hydrocarbonsmentioning

confidence: 96%

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: Pollutant Switch From Gasoline To Diesel Hydrocarbonsmentioning

confidence: 96%

Biofiltration of gasoline and diesel aliphatic hydrocarbons

Halecky

Rousova

Páca

et al. 2015

Journal of the Air & Waste Management Association

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“…In such gasliquid-liquid processes, the mass transfer coefficient K L a is a key parameter in estimating reactor performance [5][6][7][8][9][10][11]. The mass transfer mechanism depends upon the dynamics of the system in which it occurs [12] but, in the case of TPPBs, the K L a change due to the addition of a nonaqueous phase (NAP) to the aqueous phase seems difficult to predict.…”

Section: Introductionmentioning

confidence: 99%

Volumetric mass transfer coefficients characterising VOC absorption in water/silicone oil mixtures

Dumont¹,

Darracq²,

Couvert³

et al. 2013

Chemical Engineering Journal

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The physical absorption of three Volatile Organic Compounds (dimethyldisulphide (DMDS), dimethylsulphide (DMS) and toluene) in "water/silicone oil" systems at a constant flow rate for mixtures of different compositions (φ = 0, 5, 10, 15, 20 and 100%) was investigated using a dynamic absorption method. The results indicate that silicone oil addition leads to a dramatic decrease in K L a which can be related to the change in the partition coefficient (H mix ). They confirm the results obtained for styrene absorption using another measurement technique [15].The interpretation of the results using dimensionless ratiosversus φ also confirms the importance of the partition coefficient ratio m R = H water /H oil in the K L a change. Moreover, the results obtained for toluene absorption in "air/water/silicone oil" systems (φ = 10, 15 and 20%) suggest that the mass transfer pathway is in the order gas→water→oil for these operating conditions. Key-wordsAbsorption; Mass Transfer; Hydrophobic VOC; TPPB; Silicone oil

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“…Some previous researchers who have done modelling in the process of gas and liquid waste handling using biofilters include Spigno et al [18] in the elimination of phenol, Majumder et al [19] in the process of removal of divalent copper dissolved in water, Jaber et al [20] in modelling bio-filters for hydrogen sulphide contained in the air, Meena et al [21] makes the mathematical modelling of the separation of a mixture of hydrophilic (methanol) and hydrophobic (α-Pinene), Santos et al [22] used a mathematical model for the removal of hydrogen sulphide by oxidation in the bio-filter, Kim and Deshusses [23] calculate the mass transfer coefficient on the packing material used for bio-filter, either in the gas layer or the liquid layer. Furthermore Yang et al [24] makes modelling of porosity variations of bio-filter equipment used in rotary drum, Ramirez et al [25] studied the kinetics of microbial growth and biodegradation of methanol and toluene, De Visscher and Li [26] studied the disappearances modelling toluene contained in the air, Agarwal et al [27] studied the mass balance for phenol degradation events.…”

Section: Mathematical Modelsmentioning

confidence: 99%

Biodegradation of sulphide in biogas by biofilm on salak fruit seeds: The effect of intra-film-gradient

Lestari

Sediawan

2018

MATEC Web Conf.

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Abstract. Elimination of H2S in biogas was performed by bio-filtration, in which H2S degrading bacteria immobilized on the packing material inside a column. Bacteria was taken from the local area, while salak fruit seed was used as packing material because it has a quite large carbon content, porous and has a high water absorption capability. To obtain a quantitative description of the process, which is useful in the design of large-scale bio-filters, two kinetics models were proposed. Model 1 assumes intra-film gradient does not exist and the gas phase is quasi-steady-state. Model 2 assumes intra-film gradient exists and the gas phase is quasisteady-state. Comparison of the calculation results using the two models to the experimental data suggested the use of model 2. This conclusion is based on both the trend and the accuracy. The trend of model 1 is more conceivable. However, for rough calculation, model 1 could be used for the reason that it is simpler than model 2. The average absolute errors of model 1 and 2 are comparable, approximately 6 ppm. It can also be concluded that intra-film gradient significantly affects the overall rate processes, while the gas phase can be assumed to be quasi-steady-state.

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Determination of mass transfer coefficients for packing materials used in biofilters and biotrickling filters for air pollution control. 1. Experimental results

Cited by 94 publications

References 22 publications

Biofiltration of gasoline and diesel aliphatic hydrocarbons

Biofiltration of gasoline and diesel aliphatic hydrocarbons

Volumetric mass transfer coefficients characterising VOC absorption in water/silicone oil mixtures

Biodegradation of sulphide in biogas by biofilm on salak fruit seeds: The effect of intra-film-gradient

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