Journal of Korean Society of Water and Wastewater (상하수도학회지)

The Korean Society of Water and Wastewater (대한상하수도학회)
권호 표지
DOI QR코드

DOI QR Code

Numerical Model for SBR Aerobic Digestion Combined with Ultrasonication and Parameter Calibration

초음파 결합형 SBR 호기성 소화의 모델과 매개변수의 보정

  • Received : 2013.06.13
  • Accepted : 2013.08.12
  • Published : 2013.08.15
Download PDF
⟨ Previous Next ⟩

Abstract

Based on the activated sludge model(ASM), a mathematical model which represents the aerobic sludge digestion by sequencing batch reactor(SBR) combined with ultrasonic treatment was composed and performed in this study. Aerobic digestion using sequencing batch reactor(SBR) equipped with ultrasound treatment was also experimented for the purpose of parameter calibration. Most of the presented kinetic parameters in ASM or ASM2 could be used for the aerobic digestion of sludge but the parameters related in hydrolysis and decay rate needed modification. Hydrolysis rate constant of organic matter in aerobic condition was estimated at $0.3day^{-1}$ and the maximum growth rate for autotrophs in aerobic condition was $0.618day^{-1}$. Solubilization reactions of particulate organics and nitrogen by ultrasonication was added in this kinetic model. The solubilization rate is considered to be proportional to the specific energy which is defined by specific ultrasound power and sonication time. The solubilization rate constant by ultrasonication was estimated at $0.202(W/L)^{-1}day^{-1}$ in this study. Autotrophs as well as heterotrophs also decomposed by ultrasonic treatment and the nitrification reaction was limited by the lack of autotrophs accumulation in the digester.

Keywords

References

  1. Bhargava D.S. and Datar M.T. (1988) Progress and kinetics of aerobic digestion of secondary sludges, Water Research, 22(1), pp.37-47. https://doi.org/10.1016/0043-1354(88)90129-7
  2. Bougrier C., Carrere H. and Delgenes J.P. (1995) Solubilisation of waste-activated sludge by ultrasonic treatment, Chemical Engineering Journal, 106, pp.163-169.
  3. Gujer W. and Henze M. (1991) Activated sludge modelling and simulation, Wat. Sci. Tech., 23(Kyoto), pp.1011-1023.
  4. Gujer W., Henze M., Mino T., Matsuo T., Wentzel M.C. and Marais G.v.R. (1995) The activated sludge model no. 2:biological phosphorus removal, Wat. Sci. Tech., 31(2), pp.1-11.
  5. Henze M., Gujer W., Mino T. and Loosdrecht M. (2007) Activated sludge models ASM1, ASM2, ASM2d and ASM3 - Ed. by IWA task group on mathematical modelling for design and operation of biological wastewater treatment, IWA publishing, UK.
  6. Kim D .H. and Chung T.H. (1999) Modeling and dynamic simulation for biological nutrient removal in a sequencing batch reactor(I), Journal of Korean Society of Water and Wastewater,, 13(3), pp.42-55.
  7. Kim M .H. and Hao O.J. (1990) Comparison of activated sludge stabilization under aerobic or anoxic condition, J. WPCF, 62(2), pp.160-168.
  8. Kim S. H., Kim H.J. and Chung T.H. (2002) Aerobic sludge digestion by intermittent aeration, Journal of Korean Society of Civil Engineers, 22(2-B), pp.245-252.
  9. Kim S. H., Lee D.W. and Kim D.H. (2012) Performance evaluation of hybrid SBR aerobic digestion combined with ultrasonication by using a mathematical model, Journal of Korean Society of Water and Wastewater, 26(6), pp.897-905. https://doi.org/10.11001/jksww.2012.26.6.897
  10. Li C., Liu G., Jin R., Zhou J. and Wang J. (2010) Kinetics model for combined (alkaline+ultrasonic) sludge disintegration, Bioresource Technology, 101, pp.8555-8557. https://doi.org/10.1016/j.biortech.2010.06.056
  11. Wang F., Wang Y. and Ji M. (2005) Mechanisms and kinetics models for ultrasonic waste activated sludge disintegration, Journal of Hazardous Materials, B123, pp.145-150.
  12. Wang X., Qiu Z., Lu S. and Ying W. (2010) Characteristics of organic, nitrogen and phosphorus species released from ultrasonic treatment of waste activated sludge, Journal of Hazardous Materials, 176, pp.135-140.
  13. Warner A.P.C., Ekama G.A. and Marais G.V.R. (1986) The activated sludge process-IV. Application of the general kinetic model to anoxic-aerobic digestion of waste activated sludge, Water Research, 20(8), pp.943-958. https://doi.org/10.1016/0043-1354(86)90035-7

Cited by

  1. Performance Estimation of SBR Aerobic Digestion Combined with Ultrasonication by Numerical Experiment vol.27, pp.6, 2013, https://doi.org/10.11001/jksww.2013.27.6.815