Journal of Korean Society of Water and Wastewater (상하수도학회지)

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

Evaluation of COD Solubilization and Reduction of Waste Activated Sludge by pH Control

pH 조절을 통한 폐활성 슬러지의 COD 가용화 및 감량화 평가

  • 김연권 (한국수자원공사 수자원연구원 상하수도연구소) ;
  • 문용택 (한국수자원공사 수자원연구원 상하수도연구소) ;
  • 김지연 (한국수자원공사 수자원연구원 상하수도연구소) ;
  • 서인석 (한국수자원공사 수자원연구원 상하수도연구소)
  • Received : 2007.06.22
  • Accepted : 2007.10.01
  • Published : 2007.10.15
Download PDF
⟨ Previous Next ⟩

Abstract

From the view point of biological wastewater treatment, C/N ratio is one of the most important factor in biological nutrient removal process. However, municipal sewage in Korea is characterized by extremely low content of carbon source and relatively higher portion of N source. Accordingly, it is necessary to dose external carbon source in order to obtain higher degree of carbon source within the process. In this study, the effects of pH pretreatment as an alternative plan for increasing carbon source on the cell disruption and COD solubility of waste activated sludge were conducted under well defined experimental conditions. During 5 hours, the value of COD solubilization rate ($S_R$) at pH 11.5 is approximately 4.4 times higher than the value of $S_R$ at pH 9.5. It is expected that the level of SCOD increased due to the result from cell disruption. However, VSS/TSS ratio was not significantly changed after 5 hours. As Alkalinity changes gradually from less than 15, 30 and 60 meq NaOH/L, average RBCOD/SCOD fraction showed 34, 36 and 45%,respectively.

Keywords

References

  1. 장은수, 최영균, 김형수, 염익태 (2003) 하수슬러지의 전처리가 슬러지의 생분해성에 미치는 영향. 상하수도학회지, 17(5), pp. 633-639
  2. 채규정, 임성균, 최광호, 김도연, 황규대 (2000) 축산폐수의 질소. 인 동시제거를 위한 전처리연구: 암모니아 스트리핑과 Stuvite 침전, 한국폐기물학회 2000년 추계학술발표회 논문집
  3. 허남효 (2004) Biogas 회수를 위한 음식물쓰레기와 하수슬러지의 고율 혐기성 통합소화, 충남대학교, 박사학위논문
  4. Aravinthan V., Mino T., Takizawa S., Satoh H. and Matsuo T. (2001) Sludge hydrolysate as a carbon source for denitrification. Wilt. Sci. Tech. 43(1), pp. 191-199
  5. Beccari M., Long G., Majone M., Rolle E. and Scarinci A. (1993) Modelling of pretreatment and acidogenic fermentation of the organic fraction of municipal solid waste. Wilt. Sci. Tech. 27(2), pp. 193-200
  6. Kim Y.K. (2003) Respirometric monitoring of a microbial behavioral characteristics change through the retrofitting process, Ph. D. Thesis, Hanyang University
  7. Kujawa K. and Klapwijk B. (1999) A method to estimate denitrification potential for predenitrification systems using I\TUR batch test. Writ. Res., 33(10), pp. 2291-2300
  8. Mininni G (2001) Incineration with energy recovery, Sludge into Biosolids-Processing, Disposal, Utilization, Spinosa, L. and Vesilind, PA (Ids.), IWA Publishing, Lodon, pp. 101-129
  9. Muller, J.A. (2001) Prospects and problems of sludge pretreatment processes, Wat. Sci Tech. 44(10), pp. 121-128
  10. Orhon D. and okg r E. U. (1997) COD fractionation wastewater characterization-The state of the art. J. Chem. Tech. Biotechnol., 68, pp. 283-293 https://doi.org/10.1002/(SICI)1097-4660(199703)68:3<283::AID-JCTB633>3.0.CO;2-X
  11. Porges N., Jasewicz L. and Hoover S.R. (1956) Principles of biological oxidation. In Biological Treatment of Sewage and Industrial Wasies. cds.J. McCabe and W.W. Eckenfelder. New York; Reinhold Publ
  12. Ray B.T., Lin J.G. and Rajan R.V. (1990) Low-level alkaline solubilization for enhanced anaerobic digestion. J. Water Pollut. Control Fed. 62(1), pp. 81-87
  13. Saiki Y., Imabayashi S., Iwabuchi C., Kitagawa Y., Okumura Y. and Kawamura II. (1999) Solubilization of excess activated sludge by self-digestion. Wat. Res. 33(8), pp. 1864-1870 https://doi.org/10.1016/S0043-1354(98)00408-4
  14. Vesilind P.A. and Spinosa L. (2001) Production and regulations Sludge Into Biosolids - Processing, Disposal, Utilization, Spinosa, L. and Vesilind, P.A. (Eds.), IWA Publishing, Lodons, 3-18
  15. Wentzel, M.C., Ekama, G.A .. Cronjc, G.L., Beeharry, A.O. (2002) Active biomass in activated sludge mixed liquor, Wat. Res., 36, pp. 439-444 https://doi.org/10.1016/S0043-1354(01)00226-3