Journal of Korean Society of Water and Wastewater (상하수도학회지)

The Korean Society of Water and Wastewater (대한상하수도학회)
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Sludge Reduction by Mechanical Solubilization in the Aerobic Digestion

호기성소화에서 가용화가 슬러지 감량화에 미치는 영향

  • 윤상현 (경희대학교 환경응용화학대학 및 환경연구센터) ;
  • 장현섭 (경희대학교 환경응용화학대학 및 환경연구센터) ;
  • 황선진 (경희대학교 환경응용화학대학 및 환경연구센터)
  • Received : 2006.09.06
  • Accepted : 2006.10.12
  • Published : 2006.10.15
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Abstract

The purpose of this study was to investigate the effects of mechanical(ball-mill) solubilization of excess sludge especially focused on the TSS(total suspended solid) reduction during the conventional aerobic digestion of sewage sludges including primary and/or excess sludge, HRT was examined at the 10 days and 20 days. According to the results of this study, TSS removal efficiency of solubilized excess sludge was almost two times higher than that of non-solubilized excess sludge. And as the proportion of the primary sludge increased, TSS removal efficiency became worse because primary sludge rarely contained microbial cells which could be easily solubilized physically. It was also proved that by the application of proper solubilization techniques to the excess sludge, HRT for the aerobic digestion could be lessened(above 50%) dramatically keeping the same or better digestion performance. The fact that between primary and excess sludges, only the excess sludge is quite effective in the sludge solubilization and in it's reduction says that excess sludge releasing sources are key-point in the sludge cake reduction field as a source control.

Keywords

References

  1. 권재현, 김봉준, 김민규, 염익태, 김형수 (2003) 전처리 방법에 따른 하수슬러지 가용화 비교연구, 상하수도학회 17(4), pp.567-573
  2. 장광언 (2005) 기계적 전처리를 적용한 하수슬러지의 혐기성 소화효율 향상 및 감량화에 대한 연구,경희대학교, 석사학위논문
  3. 정연규, 안규홍, 박준홍 (1994) 초기고형물농도가 호기성 소화의 Kinetics에 미치는 영향에 관한 연구, 상하수도학회지, 2 (1). pp.2S-23
  4. 초광명 (1981) 여과막활성 슬러지 공법에 의한 슬러지의 호기성소화에 관한 연구, 대한환경공학회지, 3(1), pp.48-54
  5. 최홍복, 황경엽, 신응배 (1996) 하수슬러지의 혐기성 소화개선을 위한 기계적 전처리, 대한환경공학회지. 18(9), pp.1095-1102
  6. 환경부 (2006) 2005 하수도통계
  7. C. Bougrier, C. Albasi, J.P. Delgenes, H. Carrere (2006) Effect of ultrasonic, thermal and ozone pre-treaments on waste activated sludge solubilisation and anaerobic biodegradability, Chemical Engineering and processing, 45, pp.711-718 https://doi.org/10.1016/j.cep.2006.02.005
  8. Chiu, TC., Cahng, CN., Lim, JG., and Huang, SJ. (1997) Alkaline and ultrasonic pretreatment of sludge before anaerobic digestion, Wat. Sci. Tech., 38, pp 425-433 https://doi.org/10.1016/S0273-1223(98)00720-3
  9. D.A Kores, and D.s. Mavinic, (1977) Aerobic digestion of waste activated sludge at low temperature, JWPCF, 49, pp.460-468
  10. H. Yasui., K. Nakamura, S. Shakuma, M. Iwasaki, and Y. Sakai (1997) A full-scale operation of a novel activated sludge process without excess sludge production, Wat. Sci. Technol., 36(11) pp.163-170 https://doi.org/10.1016/S0273-1223(97)00704-X
  11. In Wook Nah, Yun Whan Kang, Kyung-Yub Hwang and Woon-Ki Song (2000) Mechanical pretreatment of waste activated sludge for anaerobic digestion process, Wat. Res. 34(8), pp.2362-2368 https://doi.org/10.1016/S0043-1354(99)00361-9
  12. J. Kopp, J.A. Miler, N. Dichtl and J. Schwedes (1997) Anaerobic digestion and dewatering characteristics of mechanically disintegrated excess sludge, Wat. Sci. Tech. 36(11), pp.129-136
  13. J.A. Mller (2001) Prospects and problems of sludge pretreatment processes, Wat. Sci. Tech. 44(10), pp.121-128
  14. J.A. Mller, G. Lehne, J. Schwedes, S. Battenberg, R. Naveke, J. Kopp, N. Dichtl, A. Scheminski, R.Krull and D.C. Hempel (1998) Disintegration of sewage sludges and influence on anaerobic digestion, Wat. Sci. Tech. 38(8-9), pp.125-433
  15. J. Ganczarczyk, By Jerzy, (1984) Activated sludge process: Theory and practice Water Research, Volume 18, Issue 11, pp.1468
  16. M. Barhenbtuch and O. Kopplow (2003) Enzymatic, mechanical and thermal pre-treatment of surplus sludge, Advances in Environmental Research. 7, pp.715 -720 https://doi.org/10.1016/S1093-0191(02)00032-1
  17. Ravisankar Arunachalam, Hemant K. Shah, Lu-Kwang Ju (2005) Monitoring aerobic sludge digestion by online scanning fluorometry, Water Research 39, pp. 1205-1214 https://doi.org/10.1016/j.watres.2004.11.028
  18. R.K Finn, P. Prave, M. Schlingmann, W. Crueger, K. Esser, R. Thauer and T. Wagner (1992) Biotechnology focus 3: fundamentals, applications, information. pp.195-196
  19. Sakai, Y., Aoyagi, T., Shiota, N., Akashi, A., and Hasegawa, S. (2000) Complete decomposition of biological waste sludge by thermophilic aerobic bacteria, Wat. Sci. Technol., 42(9) pp.81-88
  20. S. Bernard, N.F.Gray (1999) Aerobic digestion of pharmaceutical and domestic wastewater sludges at ambient temperature, Wat. Res. 34(3), pp.725-734 https://doi.org/10.1016/S0043-1354(99)00234-1
  21. T. John, Novak, E. Mary, Sadler, sudhir N. Murthy (2003) Mechanisms of floc destruction during anaerobic and aerobic digestion and the effect on conditioning and dewatering of hiosolids, water research 37, pp.3136- 3144 https://doi.org/10.1016/S0043-1354(03)00171-4