Korean Journal of Chemical Engineering

, Volume 25, Issue 1, pp 129–133

Biological nutrient removal with volatile fatty acids from food wastes in sequencing batch reactor


  • Seong-Jin Lim
    • LG Environmental Strategy Institute
  • Eun-Young Kim
    • LG Environmental Strategy Institute
    • Department of Chemical and Biomolecular EngineeringKAIST
  • Yeong-Hee Ahn
    • LG Environmental Strategy Institute
    • Department of Environmental EngineeringDong-A University
    • LG Environmental Strategy Institute

DOI: 10.1007/s11814-008-0023-4

Cite this article as:
Lim, S., Kim, E., Ahn, Y. et al. Korean J. Chem. Eng. (2008) 25: 129. doi:10.1007/s11814-008-0023-4


Volatile fatty acids (VFAs) derived from food waste were used as an alternative carbon source in biological nutrient removal. The pH Profiles were monitored during the nutrient removal in an Na-acetate fed sequencing batch reactor (SBR) (C source). Effluent N, P and SCOD concentrations of 0.5 and 0.1 mg/L were achieved with 5.5 hour of HRT (hydraulic retention time) when influent concentrations of NH4+-N, PO43− and SCOD were 42.5, 5.92 and 180 mg/L. Then the SBR was fed with four solutions of VFAs produced under different acidogenesis conditions of food wastes. VFAs-added SBR showed similar specific nitrification rates (3.0 to 3.9 mg-N/g MLSS · h) to that of acetate, but specific denitrification rates (3.2 to 4.2 mg NO3N/g MLSS·h) were slightly lower than with acetate of 4.67 mg NO3-N/g MLSS·h. VFAs-introduced SBR efficiently removed phosphorus except when the SBR was fed with a VFA-solution containing high amounts of valerate and caproate.

Key words

Biological Nutrient Removal (BNR)Food WastesSequencing Batch Reactor (SBR)Volatile Fatty Acids (VFAs)
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© Springer 2008