Influence of Water Content on Biofiltration Performance

https://doi.org/10.22146/ajche.50087

Daisy B Badilla(1*), Peter A Gostomski(2), Maria Lourdes P Dalida(3)

(1) University of the Philippines, Department of Chemical Engineering, Diliman, Quezon City, Philippines
(2) University of Canterbury, Department of Chemical and Process Engineering, Christchurch, New Zealand
(3) University of the Philippines, Department of Chemical Engineering, Diliman, Quezon City, Philippines
(*) Corresponding Author

Abstract


In biofiltration, contaminants in a gas stream are transferred into a biofilm on the filter bed medium and are metabolized by the microorganisms. Water is essential for microbial growth/activity and for transport of nutrients. In both full-scale and laboratory-scale systems, the water content of the medium is difficult to control. In this study, a biofilter, with rigorous water content control and internal gas recycle, was used to determine the influence of the water content on the degradation of toluene. Soil was used as the medium for treating toluene-contaminated air at an average inlet concentration of 263 ppm and a flow rate of 21 ml min-1. Through a water retention curve, gravimetric water content was related to matric potential. Results showed that lowering the water content from 79 to 48% (dry weight) or -20 to -400 cm H2O matric potential decreased the elimination capacity (EC) by 42% (29.8 to 17.3 g m-3h-1). Wetting the medium by increasing the matric potential from -400 to -10 cm H2O increased the elimination capacity to 43.9 g m-3h-1. However, further increase of the matric potential from -10 to -5 cm H2O decreased the elimination capacity by 57% (43.9 to 19.0 g m-3 h-1). Thus, this study suggests the soil water content should be controlled at about 96% (dry weight) or a matric potential of -10 cm H2O and the maximum elimination capacity is restricted to a narrow water content/matric potential. This narrow range impacts on the operation of full-scale biofilters as traditional techniques for water content control would make maintaining this range difficult.

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References

  1. Auria, R., Aycaguer, A. C., & Devinny, J. S. (1998). Influence of water content on degradation rates for ethanol in biofiltration. Journal of Air and Waste Management Association, 48 (1) 65-70.
  2. Auria, R., Frere, G., Morales, M., Acuna, M. E, & Revah, S. (2000). Influence of mixing and water addition on the removal rate of toluene vapors in a biofilter. Biotechnology and Bioengineering, 68 (4) 448-455
  3. Beuger, A. L. & Gostomski, P. A. (2009). Development of a biofilter with water content control for research purposes. Chemical Engineering Journal, 151, 89-96.
  4. Bohn H. L. & Bohn, K. H. (1999). Moisture in biofilters. Environmental Progress, 18, 156- 161.
  5. Bottner, P., (1985). Response of microbial biomass to alternate moist and dry conditions in a soil incubated with C-14- labeled and N-15-labelled plant-material. Soil Biology & Biochemistry, 17, 329-337.
  6. Cardenas-Gonzalez, B., Ergas, S. J., Switzenbaum, M. S. & Phillibert, N. (1999). Evaluation of full-scale biofilter media performance. Environmental Progress, 18 (3) 205-211.
  7. Chang, K. & C. Lu, C. (2003). Biofiltration of toluene and acetone mixtures by a trickle- bed air biofilter. World Journal of Microbiology & Biotechnology, 19, 791-798.
  8. Chenu, C. & Roberson, E. B. (1996). Diffusion of glucose in microbial extracellular polysaccharide as affected by water potential. Soil Biology & Biochemistry, 28, 877-884.
  9. Davis, J. W. & Madsen, S. (1996). Factors affecting the biodegradation of toluene in soil. Chemosphere, 33 (1) 107-130.
  10. Devinny, J. S., Deshusses, M. A. & Webster, T. S. (1999). Biofiltration for Air Pollution Control. (p. 55) CRC Press LLC, USA.
  11. Hillel, D. (1971). Soil and Water: Physical Principles and Processes (pp. 65-67). Academic Press, New York.
  12. Holden, P. A., & N. Fierer, N. (2005). Microbial processes in the vadose zone. Vadose Zone Journal, 4, 1-21.
  13. Jorio, H., Kiared, K., Brzezinski, R., Leroux, A., Viel, G. & Heitz, M. (1998). Treatment of air polluted with high concentrations of toluene and xylene in a pilot-scale biofilter. Journal of Chemical Technology and Biotechnology, 73, 183-196.
  14. Jury, W. A., Gardner, W. R. & Gardner, W. H. (1991). Soil Physics, (5th Ed.) (pp. 65-68). John Wiley & Sons, Inc,.
  15. Leson, G & Winer, A. M. (1991). Biofiltration: an innovative air pollution control technology for VOC emissions. Journal of Waste and Air Management Association, 41 (8) 1045-1054.
  16. Madigan, J. M., Martinko, M. T. & Parker, J. (1997). Biology of Microorganisms, (8th Ed.) Prentice-Hall Inc. NJ.
  17. Marek, J., Paca, J., Koutsky, B. & Gerrard, A. M. (1999). Determination of local elimination capacities and moisture contents in different biofilters treating toluene and xylene. Biodegradation, 10, 307-313.
  18. Martin, G., Lemasle, M. & Taha, S. (1996). The control of gaseous nitrogen pollutant removal in a fixed peat bed reactor. Journal of Biotechnology, 46, 15-21.
  19. Morales, M., Hernández, S., Cornabé, T., Revah, S. & Auria, R. (2003). Effect of drying on biofilter performance: modeling and experimental approach. Environmental Science and Technology, 37 (5) 985-992.
  20. Papendick, R. I. & Campbell, G. S., (1981a). Theory and Measurement of Water Potential. (pp. 1-22) In Water Potential Relations in Soil Microbiology, 1981, SSSA Special Publication No. 9, Soil Science Society of America, Madison.
  21. Papendick, R. I. & Campbell, G. S., (1981b). Decomposition Processes. (pp. 97-117) In Water Potential Relations in Soil Microbiology, 1981, SSSA Special Publication No. 9, Soil Science Society of America, Madison.
  22. Potts, M. (1994). Desiccation tolerance of prokaryotes. Microbiology Review, 58, 755- 805.
  23. Poulsen. T. G. & Jensen, A. H. (2007). Gaseous ammonia uptake in compost biofilters as related to compost water content. Journal of Air and Waste Management Association, 57 (8) 940-946.
  24. Ranasinghe, M. A. & Gostomski, P. A., (2003). A novel reactor for exploring the effect of water content on biofilter degradation rates. Environmental Progress, 22 (2) 103- 109.
  25. Roberson, E. B. & Firestone, M. K. (1992). Relationship between desiccation and exopolysaccharide production in a soil pseudomonas. Applied and Environmental Microbiology, 58, 1284-1291.
  26. Rodrigo, A., Recous, S., Neel, C. & Mary, B. (1997). Modelling temperature and moisture effects on C-N transformations in soils: comparison of nine models. Ecological Modelling, 102: 325-339.
  27. Singh, R. S., Rai, B. N., & Upadhyay, S. N. (2006). Performance evaluation of an agro-waste based biofilter treating toluene vapours. Environmental Technology, 27, 349-357.
  28. Sun, Y. M., Quan, X., J. W., Chen, J. W., Yang, F. L., Xue, D. M., Liu, Y. H. & Yang, Z. H. (2002). Toluene vapour degradation and microbial community in biofilter at various moisture content. Process Biochemistry, 38, 109-113.
  29. Van Langenhove, H., Wuyts, E. & Schamp, N. (1986). Elimination of hydrogen sulphide from odorous air by a wood bark biofilter. Water Research, 20 (12) 1471-1476.
  30. van Lith, C., Leson, G. & Michelsen, R. (1997). Evaluating design options for biofilters. Journal of Air and Waste Management Association, 47, 37-48.
  31. Swanson, W. J. & Loehr, R. C. (1997). Biofiltration: fundamentals, design and operations principles, and applications. Journal of Environmental Engineering, 123 (6) 538-546.
  32. Wright, W. F., Schroeder, E. D., Chang, D. P. Y. & Romstad, K. (1997). Performance of a pilot-scale compost biofilter treating gasoline vapor. Journal of Environmental Engineering, June 1997, 547-555.
  33. Zhu, X., Suidan,M. T., Pruden, A., Yang, C., Alonso, C., Kim, B. J. & Kim, B. R. (2004). Effect of substrate Henry's constant on biofilter performance. Journal of Air and Waste Management Association, 54 (4) 409-418.
  34. Znad, H. T., Katoh, K., & Kawase, Y. (2006). High toluene loading treatment in a compost based biofilter using up-flow and down-flow swing operation. Journal of Hazardous Materials, 141, 745-752.



DOI: https://doi.org/10.22146/ajche.50087

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