Evaluation of Trickle Bed Air Biofilter Performance for BTEX Removal

Sorial, George A.; Smith, Francis L.; Suidan, Makram T.; Pandit, Amit Kant; Biswas, Pratim; Brenner, Richard C.

doi:10.1061/(asce)0733-9372(1997)123:6(530)

Cited by 80 publications

(51 citation statements)

References 6 publications

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“…Based on the amount determined by eq 10, it was found that less than 5 ppmv of NH 3 was present in the effluent gaseous stream 20 min after backwashing. Furthermore, during the backwashing of the biofilter, it was noted that the appearance and backwashing behavior of the pellets was different from when toluene (Smith et al 20 ), BTEX (Sorial et al 17 ), or styrene (Sorial et al 21 ) were treated. During backwashing of the NH 3 -treating biofilter, very little biomass was removed, the biofilm appeared to be thinner, and the pellets were more free flowing.…”

Section: Biofilter Effluent Response After Backwashingmentioning

confidence: 99%

“…It was observed that when the NH 3 feed was switched to the gaseous form, we inadvertently forgot to add phosphorus to the nutrient feed. This absence of nutrient-P led us to postulate that nutrient limitation might have contributed to effective biomass control as was demonstrated in another study by Sorial et al 17 On day 149, nutrient-P was added to the nutrient formulation such that the ratio of nitrogen to phosphorus was 4:1. The effluent pH was stable above 7.5 for the remaining running period (up to day 170).…”

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confidence: 99%

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Removal of Ammonia from Contaminated Air by Trickle Bed Air Biofilters

Sorial

Smith

Suidan

et al. 2001

Journal of the Air & Waste Management Association

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A trickle bed air biofilter (TBAB) was evaluated for the oxidation of NH 3 from an airstream. Six-millimeter Celite pellets (R-635) were used for the biological attachment medium. The efficiency of the biofilter in oxidizing NH 3 was evaluated using NH 3 loading rates as high as 48 mol NH 3 /m 3 hr and empty-bed residence times (EBRTs) as low as 1 min. Excess biomass was controlled through periodic backwashing of the biofilter with water at a rate sufficient to fluidize the medium. The main goal was to demonstrate that high removal efficiencies could be sustained over long periods of operation. Ammonia oxidation efficiencies in excess of 99% were consistently achieved when the pH of the liquid nutrient feed was maintained at 8.5. Quick recovery of the biofilter after backwashing was observed after only 20 min. Evaluation of biofilter performance with depth revealed that NH 3 did not persist in the gas phase beyond 0.3 m into the depth of the medium (26% of total medium depth).

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Section: Biofilter Effluent Response After Backwashingmentioning

confidence: 99%

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confidence: 99%

Removal of Ammonia from Contaminated Air by Trickle Bed Air Biofilters

Sorial

Smith

Suidan

et al. 2001

Journal of the Air & Waste Management Association

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“…This has generated a new demand for cost-effective technologies to control their emissions. The biofiltration process utilizes a microbial film fixed on support media in a single process reactor where the contaminants are absorbed from the off-gas and converted to benign end products such as water and carbon dioxide (Sorial et al, 1997). Due to lower operating costs, biofiltration can provide significant economic advantages over other air pollutant control technologies (Leson and Winer, 1991).…”

Section: Introductionmentioning

confidence: 99%

“…In a trickle bed air biofilter (TBAB), which is one of the biofiltration processes, inert synthetic support media are used for the filter bed (Sorial et al, 1997). A TBAB requires an inoculation with an appropriate microbial culture.…”

Section: Introductionmentioning

confidence: 99%

Isolation, Characterization and Application to Off-Gas Treatment of Toluene-Degrading Bacteria.

Hori

Yamashita

Ishii

et al. 2001

J. Chem. Eng. Japan

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Toluene-degrading bacteria were isolated from the trickle bed air biofilter (TBAB), which had eliminated toluene efficiently for three months. Among the isolates, Acinetobacter genospecies Tol 5 demonstrated the highest efficiency in toluene removal. A. genospecies Tol 5 tended to adhere to hydrophobic materials showing water-repellent. When the bacterium was grown on toluene in the presence of polyurethane foam, almost all the cells adhered to the polymer support until the amount of 0.12 kg-cell/kgpolyurethane. Analyses of cell surface hydrophobicity by the microbial-adhesion-to-hydrocarbons test and contact angle measurements revealed that A. genospecies Tol 5 has a noteworthily hydrophobic cell surface compared with Escherichia coli. A TBAB inoculated with A. genospecies Tol 5 showed a sufficiently high ability in toluene elimination within 24 h after starting the operation without preliminary operation for immobilization, suggesting that this strain was effective to shorten the adaptation period, which had been considerably long on the TBAB inoculated with the original activated sludge.

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“…Numerous findings from this extensive experimental work have been published elsewhere. [5][6][7][8][9][10][11] During the final experimental study with toluene, 8 four TBABs were operated in parallel for more than 9 months to evaluate the extended performance of TBAB technology as a function of VOC concentration, VOC loading, and biomass control strategies. This four-TBAB study was performed using VOC concentrations of 250-and 500-ppmv toluene and biofilter loadings of 4.1 and 6.2 kg COD (chemical oxygen demand)/(m 3 ⋅day), with empty bed residence times (EBRTs) of 0.67, 1.33, 1.0, and 2.0 min.…”

Section: Introductionmentioning

confidence: 99%

Development and Demonstration of an Explicit Lumped-Parameter Biofilter Model and Design Equation Incorporating Monod Kinetics

Smith

Sorial

Suidan

et al. 2002

Journal of the Air & Waste Management Association

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Biofiltration is an economical air pollution control (APC) technology, particularly suitable for the treatment of airstreams having high flow rates and low concentrations of volatile organic compounds (VOCs). This technology utilizes enzymatic catalysis at ambient conditions to mineralize such pollutants to CO 2 , H 2 O, and salts. A pilot-scale study conducted for more than 4 years investigated the development of a new biofiltration technology employing trickle bed air biofilters (TBABs). Following the completion of this experimental study, additional data analysis was performed to develop a simple lumped-parameter biofilter model, assuming first-order kinetics. This model related the observed biofilter performance to the principle independent physical, thermodynamic, and biochemical parameters. The initial model has subsequently been expanded to incorporate Monod kinetics. In this paper, the development and use of the final explicit lumped-parameter biofilter model and design equation, incorporating Monod kinetics, are presented. To facilitate the application of this model, practical procedures are also presented for the determination of VOC solubility, VOC biokinetic Monod parameters, and the maximum practical biofilter inlet VOC concentration.

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Evaluation of Trickle Bed Air Biofilter Performance for BTEX Removal

Cited by 80 publications

References 6 publications

Removal of Ammonia from Contaminated Air by Trickle Bed Air Biofilters

Removal of Ammonia from Contaminated Air by Trickle Bed Air Biofilters

Isolation, Characterization and Application to Off-Gas Treatment of Toluene-Degrading Bacteria.

Development and Demonstration of an Explicit Lumped-Parameter Biofilter Model and Design Equation Incorporating Monod Kinetics

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