Korean Journal of Environmental Agriculture (한국환경농학회지)

The Korean Society of Environmental Agriculture (한국환경농학회)
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Performance Evaluation of Anaerobic Bioreactors and Effects of Ammonia on Anaerobic Digestion in Treating Swine Wastewaters

  • Lee, Gook-Hee (Department of Environmental Engineering, Sun Moon University) ;
  • Seo, Jun-Won (Department of Environmental Engineering, Sun Moon University) ;
  • Kim, Jong-Soo (Department of Environmental Engineering, Sun Moon University)
  • Published : 2006.09.30
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Abstract

The operational characteristics of anaerobic bioreactors in treating swine wastewater were evaluated upto hydraulic retention time (HRT) of 1 day and organic loading rate (OLR) of $5.1kg-COD/m^3{\cdot}d$ for 200 days. The bioreactors were effective in treating swine wastewaters with COD removal efficiency of $78.9{\sim}81.5%$ and biogas generation of $0.39{\sim}0.59m^3/kg-COD_r$ at OLR of $1.1{\sim}2.2kg-COD/m^3{\cdot}d$. The two-stage ASBF anaerobic bioreactors was effective in treating different characteristics of swine wastewaters since they showed high and stable COD removal efficiency at high OLR due to effective retention of biomass by media and staging. The effects of ammonia on anaerobic digestion were investigated by operating two-stage ASBF reactors using swine wastewaters as influent without and with ammonia removal at HRT of $1{\sim}2$ days and OLR of $2.2{\sim}9.6kg-COD/m^3{\cdot}d$ for 250 days. The COD removal efficiency and biogas generation of two-stage ASBF reactors was decreased by increasing influent ammonia concentrations to 1,580 mg (T-N)/L with increasing OLR to $6.3kg-COD/m^3{\cdot}d$, while those were increased by maintaining influent ammonia concentrations below 340 mg (T-N)/L by MAP precipitation with increasing OLR to $9.6kg-COD/m^3{\cdot}d$. Initial inhibition of ammonia on anaerobic processes was observed at a concentration of 760 mg (T-N)/L and the COD removal efficiency and biogas generation dropped to 1/2 at ammonia concentration ranges of $1,540{\sim}1,870mg$ (T-N)/L. It is essential to remove ammonia in swine wastewaters to an initial inhibition level before anaerobic processes for the effective removal of COD.

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References

  1. Lettinga, G. and Pol, L. H. (1986) Advanced anaerobic reactor design, operation and economy, Water Sci. Technol. 18(1), 99-108 https://doi.org/10.2166/wst.1986.0166
  2. Young, J. C. and Yang, B. S. (1989) Design considerations for full-scale anaerobic filters, J. WPCF, 61(9), 1576-1587
  3. Lee, G. H., Sa, T., and Kim J. S. (2000) Performance evaluation of anaerobic bioreactors in treating swine wastewaters. J. Kor. Soc. of Environ. Eng. 22(11), 2047-2058
  4. Fox, P. and Pohland, F. G. (1994) Anaerobic treatment applications and fundamentals: substrate specificity during phase separation, Wat. Environ. Res. 66(5), 716-724 https://doi.org/10.2175/WER.66.5.8
  5. Speeces, R. E. (1996) Anaerobic biotechnology for industrial wastewaters, Archaepress, Tennessee, USA
  6. Koster, I. W. (1986) Characteristic of the pH-influenced adaptation of methanogenic sludge to ammonium toxicity, J. Chem. Tech. Biotechnol. 35, 445-455
  7. Hensen, K. H., Anbelidaki, I., and Ahring, B. K. (1998) Anaerobic digestion of swine mannure: inhibition of ammonia, Water Res. 32(1), 5-12 https://doi.org/10.1016/S0043-1354(97)00201-7
  8. Seo, J. W. and Sa, T., and Kim, J. S. (2001) Effects of ammonia removal in swine wastewaters on anaerobic digestion using two-stage ASBF reactors, J. Kor. Solid Wastes Eng. Soc. 18(1), 60-68
  9. Koster, I. W. and Lettinga, G. (1988) Anaerobic digestion at extreme ammonia concentrations, Biological Wastes, 25, 51-59 https://doi.org/10.1016/0269-7483(88)90127-9
  10. Weon, S. Y., Park, S. K., and Lee, S. I. (2000) Removal of nitrogen and phosphorus using struvite crystallization, J. Kor. Soc. of Environ. Eng. 22(4), 599-607
  11. APHA (1995) Standard methods for the examination of water and wastewater, 19th ed., American Public Health Association, Washington, D. C., USA
  12. Tay J. H., Show, K. Y., and Jaysaseelan, S. (1996) Effects of media characteristics on performance of upflow anaerobic packed-bed reactor. J. Environ. Eng.-ASCE 6, 122(6), 469-476 https://doi.org/10.1061/(ASCE)0733-9372(1996)122:6(469)