EVALUATION OF CONTAMINATED AIR VELOCITY ON THE FORMALDEHYDE REMOVAL EFFICIENCY BY USING A BIOTRICKLING FILTER REACTOR
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Abstract
Introduction: Formaldehyde is a toxic, carcinogen, mutagen and teratogen compound that is widely released into the atmosphere worldwide. The toxicity effect of formaldehyde on microorganisms is a serious obstacle on the path of using biological treatment methods. The main objective of this study is to evaluate the effect of air velocity on the efficiency of a Biotrickling Filter Reactor (BTFR) for removal of formaldehyde from an air stream.
Materials and methods: A BTFR and Bioscience Laboratory Respirometer were employed for continuous and batch experiments, respectively. Three gas flow rates including 90, 291 and 1512 L/h were used to find out the effect of velocity on the formaldehyde removal efficiency of the BTFR. Monod model was modified to be capable of predicting the BTFR cases having very high formaldehyde removal efficiency.
Results: The results showed that for the gas flow rates of 90, 291 and 1512 L/h in BTFR, formaldehyde removal efficiency of 95, 97 and 99% were achieved, respectively. These results showed that higher air flow velocity lead to higher removal of formaldehyde from air in a BTFR. A very slow formaldehyde removal was observed during batch experiment where the gas velocity is set equal zero.
Conclusions: This study demonstrated that the mass transfer in gas phase is an important step in formaldehyde treatment in a BTFR. Very slow formaldehyde removal in the batch system which can be ascribed to the very low mass transfer rate in gas phase confirms the fact that this rate is a controlling step in overall removal rate in BTFR.
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. 2013;3(38):17462-8.
Talaiekhozani A, Fulazzaky MA, Ponraj M, Majid ZA. Formaldehyde from production to application. The 3th Conference of Application of Chemistry in Novel Technologies; 2013; Iran.
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):5100-7.
Talaiekhozani A. Evaluation of Formaldehyde Removal from Synthetic Contaminated Air Using Biotrickling Filter Reactor, PhD Thesis, Universiti Teknologi Malaysia;2013.
Fulazzaky MA, Talaiekhozani A, Ponraj M, Abd Majid MZ, Hadibarata T, Goli A. Biofiltration process as an ideal approach to remove pollutants from polluted air. Desalination and Water Treatment. 2014 ;7;52(19-21):3600-15.
Talaiekhozani A, Ali Fulazzaky M, Ponraj M, Abd Majid M. Removal of formaldehyde from polluted air in a biotrickling filter reactor. Desalination and Water Treatment. 2014;52(19-21):3663-71.
Fulazzaky MA, Talaiekhozani A, Majid MZA. Formaldehyde removal mechanisms in a biotrickling filter reactor. Ecological Engineering. 2016;90:77-81.
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):6757-60.
Gonzalez-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 and technology. 1999;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.2004;38(7):1685-94.
Fulazzaky MA, Talaiekhozani A, Ponraj M, Abd Majid MZ, 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.
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 S, Roin H, Ferdosi M, Nasernejad R. Toluen removal from air stream using biofilter inoculated by fungi in bach condition. Iranian Chemical Engineering Journal. (Special Issue: Advances in Biotechnology).2010;9:69-75.
Fulazzaky MA. Assessing the suitability of stream water for five different uses and its aquatic environment. Environmental monitoring and assessment. 2013;185(1):523-35.
EPA. Formaldehyde Measurement Using Derivitization by EPA Method 323, EPA Emission Measurement Center. [Cite date 19 Jun 2016]. Available from: http://www.epa.gov/ttn/emc/method /method323.html.
Jardim WF, Rohwedder JJ. Chemical oxygen demand (COD) using microwave digestion. Water Research. 1989;23(8):1069-71.
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, Talaie MR, Fulazzaky MA. Evaluation of formaldehyde removal from contaminated air by using a biotrickling filter reactor in a continuous condition. Journal of Air Pollution and Health. 2016;1(2):69-76.
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.
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| Issue | Vol 1 No 3 (2016): Summer 2016 | |
| Section | Original Research | |
| Keywords | ||
| Biotrickling filter reactor formaldehyde removal mathematical model air control. | ||
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