Assessment of Characteristics of Biofilm Formed on Autotrophic Denitrification

  • JANG AM (Department of Civil and Environmental Engineering, University of Cincinnati) ;
  • BUM MINSU (Department of Environmental Science and Engineering, Gwangju Institute of Science & Technology (GIST)) ;
  • KIM SUNGYOUN (Department of Environmental Science and Engineering, Gwangju Institute of Science & Technology (GIST)) ;
  • AHN YEONGHEE (Department of Environmental Science and Engineering, Gwangju Institute of Science & Technology (GIST)) ;
  • KIM IN S (Department of Environmental Science and Engineering, Gwangju Institute of Science & Technology (GIST)) ;
  • BISHOP PAUL L (Department of Civil and Environmental Engineering, University of Cincinnati)
  • Published : 2005.06.01

Abstract

A pilot-scale sulfur particle autotrophic denitrification (SPAD) process for the treatment of municipal wastewater was operated for 10 months at Shihwa, Korea, and higher than $90\%\;NO^{-}_{3}-N$ removal efficiency was observed. Plate counting showed that the lower part of the denitrifying column reactor had the most autotrophic denitrifiers. The biofilm thickness formed on sulfur particles from the SPAD reactor was approximately $25-30\;{\mu}m$, measured by DAPI (4,6-diamidino-2-phenylindole) staining. The presence of bacteria inside the highly porous sulfur particle was also monitored by SEM observation of the internal surfaces of broken sulfur particles. Biofilm extracellular polymeric substances (EPS) analysis showed that the ratio of carbohydrate to protein decreased with the reactor heights at which biofilm-formed sulfur particles were obtained.

Keywords

References

  1. Hashimoto, S., K. Furkawa, and M. Shioyama. 1978. Autotrophic denitrification using elemental sulfur. J. Ferment. Technol. 63: 683-692
  2. Horan, N. J. and C. R. Eccles. 1986. Purification and characterization of extracellular polysaccharide from activated sludges. Wat. Res. 20: 1427-1432 https://doi.org/10.1016/0043-1354(86)90142-9
  3. Jang, A., S. M. Kim, S. Y. Kim, S. G. Lee, and I. S. Kim. 2001. Effect of heavy metals (Cu, Pb, and Ni) on the compositions of EPS in biofilms. Wat. Sci. Tech. 43: 41-48
  4. Kim, I. G., M. S. Lee, T. E. Jin, B. K. Hwang, J. H. Lee, S. C. Suh, and S. L. Rhim. 2004. Inhibitory effect of bacteriophage EPS-depolymerase on growth of Asian pear blight pathogen Erwinia pyrifoliae. J. Microbiol. Biotechnol. 14: 872-876
  5. Kim, S. H., S. H. Song, and Y. J. Yoo. 2004. The pH as a control parameter for oxidation-reduction potential on the denitrification by Ochrobactrum anthropi SY509. J. Microbiol. Biotechnol. 14: 639-642
  6. Koenig, A. and L. H. Liu. 1996. Autotrophic denitrification of landfill leachate using elemental sulphur. Wat. Sci. Tech. 34: 469-476
  7. Kuenen, J. G. 1979. Growth yields and maintenance energy requirement in Thiobacillus species under energy limitation. Arch. Microbiol. 122: 183-188 https://doi.org/10.1007/BF00411358
  8. Matin, A. 1978. Organic nutrition of chemolithotrophic bacteria. Annu. Rev. Microbiol. 32: 433-468 https://doi.org/10.1146/annurev.mi.32.100178.002245
  9. Oh, S.-E., K. S. Kim, H.-C. Choi, J. Cho, and I. S. Kim. 2000. Kinetics and physicochemical characteristics of autotrophic denitrification by denitrifying sulfur bacteria. Wat. Sci. Tech. 42: 59-68
  10. Sikora, L. J. and D. R. Keeney. 1976. Evaluation of a sulfur- Thiobacillus denitrificans nitrate removal system. J. Environ. Qual. 5: 298-303 https://doi.org/10.2134/jeq1976.00472425000500030016x
  11. Song, S. H., S. H. Yeom, S. S. Cho, and Y. J. Yoo. 2003. Effect of oxidation-reduction potential on denitrification by Ochrobactrum anthropi SY509. J. Microbiol. Biotechnol. 13: 473-476
  12. Tian, K. L., J. Q. Lin, X. M. Liu, Y. Liu, C. K. Zhang, and W. M. Yan. 2004. Expression of E. coli phosphofructokinase gene in an autotrophic bacterium Acidithiobacillus thiooxidans. J. Microbiol. Biotechnol. 14: 56-61
  13. US EPA. 1994. Nitrogen Control. Washington D.C., U.S.A
  14. van der Hoek, J. P., J. W. N. M. Kappelhof, and W. A. M. Hijnen. 1992. Biological nitrate removal from groundwater by sulfur/limestone denitrification. J. Chem. Technol. Biotechnol. 54: 197-200
  15. Zhang, T. C. and D. G. Lampe. 1999. Sulfur:limestone autotrophic denitrification processes for treatment of nitratecontaminated water: Batch experiments. Wat. Res. 33: 599-608 https://doi.org/10.1016/S0043-1354(98)00281-4