EVALUATION OF FORMALDEHYDE REMOVAL FROM CONTAMINATED AIR BY USING A BIOTRICKLING FILTER REACTOR IN A CONTINUOUS CONDITION

  • Amirreza Talaiekhozani Department of Civil and Environmental Engineering, Jami Institute of Technology, Isfahan
  • Mohammad Reza Talaie Department of Chemical Engineering, Faculty of Engineering, University of Isfahan, Isfahan, Iran
  • Mohamad Ali Fulazzaky Institute of Environmental and Water Resources Management, Water Research Alliance, Universiti Teknologi Malaysia, 81310 UTM Skudai, Johor Bharu, Malaysia
Keywords: Biotrickling filter reactor, formaldehyde removal, mathematical model, air pollution control

Abstract

Introduction: Formaldehyde is a toxic, mutagen and teratogen chemical, and it is suspected to be carcinogenic to humans. As a result, it can be classified as a noxious air pollutant which must be removed from any formaldehyde-contaminated air stream before releasing to the atmosphere. Biological methods, particularly biotrickling filtration, have recently attracted a great deal of attention due to low operating cost and high removal efficiency.


Materials and Methods: In this study, the biotrickling filtration of air stream contaminated by formaldehyde was investigated in a continuous system. The main objective of this study was to investigate formaldehyde biotrickling processes in continuous mode, culminating in the development of a mathematical relation to correlate volumetric mass transfer coefficient versus the Reynolds number of gas flow. During these experiments, formaldehyde removal efficiencies of 97, 97.5 and 96.5% were achieved for the gas flow rates of 90, 291 and 1512 l/h, respectively. Biotrickling filter reactor (BTFR) was employed for this continuous experiment.


Results: The results obtained in this study show that the mass transfer from gas phase to the gas-wet biomass interphase is the controlling step, and the reaction rate is not an important factor in this case for a wide range of gas flow rates and gas velocities.


Conclusions: The analyses demonstrate that external mass transfer is the controlling step compared to diffusion through liquid phase and bio-reactions. The results also show that using smaller but longer beds resulting in higher velocities enhances the mass transfer rate and hence the removal efficiency.

References

Talaiekhozani A, Fulazzaky M, Ponraj M, Majid ZA.

Formaldehyde from production to application. 3rd conference

on application of chemistry on novel technologies.

November 7.

Fulazzaky MA, Talaiekhozani A, Majid MZA, Ponraj

M, Goli A. Evaluation of gas retention time effects on

the bio-trickling filter reactor performance for treating

air contaminated with formaldehyde. RSC Advances.

;3(38):17462-8.

Fulazzaky MA, Talaiekhozani A, Hadibarata T. Calculation

of optimal gas retention time using a logarithmic

equation applied to a bio-trickling filter reactor for

formaldehyde removal from synthetic contaminated air.

RSC Advances. 2013:3(15): 5100-5107.

Fulazzaky MA, Talaiekhozani A, Ponraj M, Majid MZA,

Hadibarata T, Goli A. Biofiltration process as an ideal

approach to remove pollutants from polluted air. Desalination

and Water Treatment.2014;52(19-21):3600–15.

Talaiekhozani A, Fulazzaky MA, Ponraj M, Majid

MZA. Removal of formaldehyde from polluted air in a

biotrickling filter reactor. Desalination and Water Treatment.

;52(19-21): 3663-71.

Prado O, Veiga MC, Kennes C. Removal of formaldehyde,

methanol, dimethylether and carbon monoxide

from waste gases of synthetic resin-producing industries.

Chemosphere. 2008;70(8): 1357-65.

Zamir SM, Roin H, Ferdosi M, Nasernejad R. Toluene

removal from air stream using biofilter inoculated by

fungi in batch condition. Iran Chem Eng J. (Special Issue:

Advances in Biotechnology).2010;9(50): 69-75.

Fulazzaky MA. Determining the resistance of mass

transfer for adsorption of the surfactants onto granular

activated carbons from hydrodynamic column. Chemical

Engineering Journal. 2011;166(3): 832-40.

Fulazzaky MA, Omar R. Removal of oil and grease

contamination from stream water using the granular

activated carbon block filter. Clean Technologies and

Environmental Policy.2012;14(5), 965-71.

Fulazzaky MA. Assessing the suitability of stream

water for five different uses and its aquatic environment.

Environmental Monitoring and Assessment.

;185(1): 523-35.

Slinker BK, Glantz SA. Multiple Linear Regression

Accounting for Multiple Simultaneous Determinants

of a Continuous Dependent Variable. Circulation.

;117(13):1732-7.

Streese J, Schlegelmilch M, Heining K, Stegmann

R. Amacrokinetic model for dimensioning of biofilters

for VOC and odour treatment.Waste Management.

;25(9): 965-74.

González-Gil G, Kleerebezem R, van Aelst A, Zoutberg

G, Versprille A, Lettinga G. Toxicity effects of

formaldehyde on methanol degrading sludge and its

anaerobic conversion in biobed expanded granular

sludge bed (EGSB) reactors. Water Science Technology.

;40(8):195–202.

Oliveira S, Moraes E, Adorno M, Varesche M, Foresti

E, Zaiat M. Formaldehyde degradation in an

anaerobic packed-bed bioreactor. Water research.

;38(7):1685-94.

Wan S, Li G, Zu L, An T. Purification of waste gas

containing high concentration trimethylamine in biotrickling

filter inoculated with B350 mixed microorganisms.

Bioresource Technology. 2011;102(12):

-60.

Fulazzaky MA, Talaiekhozani A, Majid MZA. Formaldehyde

removal mechanisms in a biotrickling filter

reactor. Ecological Engineering. 2016;90:77-81.

JardimWF, Rohwedder JJ. Chemical oxygen demand

(COD) using microwave digestion.Water Research.

;23(8): 1069–71.

Environmental Protection Agency [Internet]. Washington:

Environmental Protection Agency; 2012. [cited

Apr 3] Available from: http://www.epa.gov/ttn/

emc/methods/method323.html.

Oliveira S, Moraes E, Adorno M, Varesche M, Foresti

E, Zaiat M. Formaldehyde degradation in an anaerobic

packed-bed bioreactor. Water Research. 2004;38(7),

-94.

Zhu X, Suidan MT, Pruden A, Yang C, Alonso C, Kim

BJ, et al. Effect of substrate Henry’s constant on biofilter

performance. Journal of the Air & Waste Management

Association. 2004;54(4):409-18.

Talaiekhozani, A. Formaldehyde Removal from Synthetic

Contaminated Air Using a Biotrickling Filter

Reactor. Ph.D Thesis. UniversitiTeknologi Malaysia.

Fulazzaky MA, Talaiekhozani A, Ponraj M, Majid

MA. An overview on biofiltration modeling. 3rd conference

on application of chemistry on novel technologies.

November 7.

Treybal RE, Treybal Robert E. Mass-transfer operations.

rd ed. New York: McGraw-Hill; 1968.

Published
2016-05-29
How to Cite
1.
Talaiekhozani A, Talaie M, Fulazzaky M. EVALUATION OF FORMALDEHYDE REMOVAL FROM CONTAMINATED AIR BY USING A BIOTRICKLING FILTER REACTOR IN A CONTINUOUS CONDITION. japh. 1(2):69-76.
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Original Research