Effects of Gas Flow Rate, Inlet Concentration and Temperature on Biofiltration of Volatile Organic Compounds in a Peat-Packed Biofilter

Yoon, Il-Hee; Park, Chang-Ho

doi:10.1263/jbb.93.165

Cited by 45 publications

(27 citation statements)

References 18 publications

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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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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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“…In Figs. 4,7,9,10,11,12 concentrations of solute in three phases have been plotted against axial position of the biofilter using gas phase superficial velocity as a parameter. Overall pattern remains the same at all values of gas velocities.…”

Section: Theoretical Analysismentioning

confidence: 99%

“…On the other hand, the solvents like toluene [4,5], styrene [6,7], and so on are used extensively in polymer industries and in different chemical process industries involving solvent extraction. Although very low in concentration, the volatile organic compounds [8,9] are highly detrimental to human health. Therefore, the emission of VOCs from microelectronic fabrication facilities and from different chemical industries must be controlled to comply with local and global environmental standards.…”

Section: Introductionmentioning

confidence: 99%

Experiments and three phase modelling of a biofilter for the removal of toluene and trichloroethylene

Das

Chowdhury

Bhattacharya

2010

Bioprocess Biosyst Eng

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Volatile organic compounds, namely, toluene, trichloroethylene, styrene, etc., disposed off by electronics and polymer industries, are very harmful. The treatment of VOC laden air through biochemical route is one of the potential options for reduction of their concentration in parts per million or parts per billion level. Under the present investigation, a 0.05-m diameter and 0.58-m high trickle bed biofilter has been studied for the removal of VOCs namely toluene and trichloroethylene from a simulated air-VOC mixture using pure strain of Pseudomonas putida (NCIM2650) in immobilized form. Inlet concentrations of VOCs have been varied in two ranges, the lower being 0.20-2.00 g/m(3) and higher being 10-20 g/m(3), respectively. The Monod type rate kinetics of removal of VOCs has been determined. A three-phase deterministic mathematical model has been developed taking the simultaneous reaction kinetics and interphase (gas to liquid to biofilm) mass transfer rate of VOCs into consideration. Experimentally determined kinetic parameters and mass transfer coefficients calculated using standard correlations have been used. Concentrations have been simulated for all the three phases. Simulated results based on the model have been compared with the experimental ones for both gas and liquid phases satisfactorily. The mathematical model validated through the successful comparison with experimental data may be utilized for the prediction of performance of biofilters undergoing removal of different VOCs in any further investigation and may be utilized for the scale-up of the system to industrial scale.

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“…Because chemical feed conditions in biofilters are generally dynamic, an important area of research is to investigate microbial changes resulting from these dynamic conditions (Jang et al, 2006;Yoon and Park, 2002). In general, contaminant mixtures are degraded in gas-phase biofilters in an order corresponding to the relative ease of biodegradation of each individual compound.…”

Section: Introductionmentioning

confidence: 99%

Relative gene expression quantification in a fungal gas‐phase biofilter

Gunsch¹,

Kinney²,

Szaniszlo³

et al. 2007

Biotech & Bioengineering

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Monitoring of gas-phase biofilter performance generally relies on macroscale measurements that neglect the molecular level phenomena that can control the biodegradation process. The present study was undertaken to determine whether or not quantitative real-time reverse transcription polymerase chain reaction (qRT-PCR) could detect changes in relative gene expression resulting from feed variations typically encountered in the field. Specifically, homogentisate-1,2-dioxygenase, ElHDO, expression was quantified as a function of short-term chemical feed variations and shutdown period in a biofilter seeded with a pure culture of the fungus Exophiala lecanii-corni. ElHDO was previously shown to be involved in ethylbenzene degradation in E. lecanii-corni. Overall, relative gene target expression numbers (T(N)) were consistent with gas-phase biofilter performance during each short-term experiment although no direct mathematical correlation was found between T(N) and ethylbenzene removal rate. During the chemical feed experiments, no effect on T(N) was measured in the presence of o-xylene which does not affect ElHDO expression. In the presence of phenylacetate, an inducer of ElHDO, T(N) increased once a threshold substrate concentration was exceeded. When methyl propyl ketone, a repressor of ElHDO, was introduced, T(N) decreased rapidly and acted as a leading indicator of bioreactor failure. In the transient loading experiments, ElHDO expression slowly decreased over a 24-h time period when the ethylbenzene feed was discontinued, but rapidly recovered upon its re-introduction. These results indicate that qRT-PCR reflects microbial activity changes that occur in gas-phase biofilters in response to short-term changes in feed conditions and provides a useful complement to the macroscale measurements typically collected.

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Effects of Gas Flow Rate, Inlet Concentration and Temperature on Biofiltration of Volatile Organic Compounds in a Peat-Packed Biofilter

Cited by 45 publications

References 18 publications

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

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

Experiments and three phase modelling of a biofilter for the removal of toluene and trichloroethylene

Relative gene expression quantification in a fungal gas‐phase biofilter

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