Journal of Korean Society on Water Environment (한국물환경학회지)

Korean Society on Water Environment (한국물환경학회)
권호 표지

A Comparative Study on the Conditioning and Dewaterability of Digested Sludge from Intermittent Aerobic Digestion

간헐포기 소화슬러지의 개량과 탈수 특성에 관한 비교 연구

  • Kim, Seong Hong (Department of Civil Engineering, Chosun University) ;
  • Choi, Young Gyun (Department of Civil and Environmental Engineering, Sungkyunkwan University) ;
  • Chung, Tai Hak (Department of Civil, Urban and Geosystem Engineering, Seoul National University)
  • 김성홍 (조선대학교 토목공학과) ;
  • 최영균 (성균관대학교 토목환경공학과) ;
  • 정태학 (서울대학교 지구환경시스템공학부)
  • Received : 2004.05.11
  • Accepted : 2004.06.07
  • Published : 2004.07.30
Download PDF
⟨ Previous Next ⟩

Abstract

Synthetic organic polyelectrolytes can be used to condition sludges to enhance their dewaterability. When conditioning biological sludges, the charge on the polymer has a significant impact on the effectiveness of the polymer as a conditioner. The objectives of this investigation were to determine the most effective type and dosage of polymer for conditioning digested sludge prior to dewatering, and to investigate the relationship between dewaterability and particle size. 3 types of digested sludge were used under the different digestion processes like anaerobic digestion, aerobic digestion and intermittent aerobic digestion. CST(capillary suction time), TTF(time-to-filter) and SRF(specific resistance to filtration) were tested as a dewaterability index and the number of particle distribution was analyzed using particle size analyzer. The results indicate that cationic polymer appears to be required for effective conditioning of these 3 types digested sludge and the optimal polymer dosage is about 0.6% of SS. CST and TTF are well correlated with mean particle diameter of which the dimension order is 1.7.

Keywords

References

  1. 김성흥, 김희준, 정태학, 간헐포기에 의한 슬러지의 호기성 소화 기술, 대한토목학회논문집, 22(2-B), pp. 245-252 (2002)
  2. Anne I. Cole and Philip C. Singer, Conditioning of anaerobically digested sludge, Journal of Environmental Engineering, American Society of Civil Engineering, 111(4), pp. 501-509 (1985)
  3. C. H. Lee and J. C. Liu, Enhanced sludge dewatering by dual polyelectrolytes conditioning, Water Research, 34(18), pp. 4430-4436 (2000)
  4. C.W. Randall, B. Richards and P.H. King, Temperature effects on aerobic digestion kinetics, Journal of Environmental Engineering. American Society of Civil Engineering, 101(EE5), pp. 795-811 (1975)
  5. Desmond F. Lawler, Yoon Jin Chung, Shiaw-Jy Hwang and Barbara A. Hull, Anaerobic digestion: Effects on particle size and dewaterability, Journal Water Pollution Control Federation, 58(12), pp. 1107-1117 (1986)
  6. Jennifer I. Houghton, Joanna E. Burgess and Tom Stephenson, Off-line particle size analysis of digested sludge, Water Research, 36, pp. 4643-4647 (2002)
  7. John T. Novak and Nazih Bandak, Chemical conditioning and the resistance of sludges to shear, Journal Water Pollution Control Federation, 61(3), pp. 327-332 (1989)
  8. K. Barbusinski and H. Koscielniak, Activated sludge floc structure during aerobic digestion, Water Science and Technology, 36(11), pp. 107-114 (1997)
  9. L. H. Mikkelsen and K. Keiding, Physico-chemical characteristics of full scale sewage sludges with implications of dewatering, Water Research, 36, pp. 2451-2462 (2002)
  10. M. Rebhun, J. Zall and N. Galil, Net sludge solids yield as an expression of filterability for conditioner optimization, Journal Water Pollution Control Federation, 61(1), pp. 52-54 (1989)
  11. Particle Sizing Systems, ACCUSIZER MODEL 780 -USER MANUAL, Particle Sizing Systems, Santa Barbara, CA, U.S.A, pp. 117-119 (2001)
  12. APHA, AWWA and WEF, Standard Methods - for the Examination of Water and Wastewater, 19th ed., Washington DC, USA, pp. 2_68-2_70 (1992)
  13. Y. Q. Zhao, E. N. Papavasilopoulos and D. H. Bache, Clogging of filter medium by excess polymer during alum sludge filtration, Filtration & Separation, December, pp. 947-950 (1998)