Key parameters in sludge dewatering: Testing for the shear sensitivity and EPS content

Water Science and Technology

Volumn 46, Issue 10, 2002, Pages 105-114

  Mikkelsen, L H ^a   Mascarenhas, T ^a   Nielsen, P H ^a  

^a AALBORG UNIVERSITY   (Denmark)

Author keywords

Adhesion energy; Dewatering; EPS content; Floc strength; Shear sensitivity

Indexed keywords

DEWATERING; POLYMERS; SEWAGE TREATMENT;

SHEAR SENSTIVITY;

SEWAGE SLUDGE;

POLYMER;

DEWATERING; FLOC; SLUDGE; TESTING; WASTEWATER;

ADHESION; ANALYTICAL PARAMETERS; COLLOID; CONFERENCE PAPER; ENERGY; LABORATORY TEST; METHODOLOGY; PROCESS DEVELOPMENT; PROCESSING; REACTOR; SENSITIVITY ANALYSIS; SLUDGE; SLUDGE DEWATERING; SLUDGE TREATMENT; WASTE WATER MANAGEMENT;

EID: 0036444412     PISSN: 02731223     EISSN: None     Source Type: Journal    
DOI: 10.2166/wst.2002.0303     Document Type: Conference Paper

References (23)

1. Camp, T.R. and Stein, P.C. (1973). Velocity gradients and internal work in fluid motion. J. Boston Soc. Civ. Eng., 30, 219-237.
2. Frølund, B., Griebe, T. and Nielsen, P.H. (1995). Enzymatic activity in the activated sludge floc matrix. Appl. Microbiol. Biotechnol., 43, 755-761.
3. Frølund, B., Palmgren, R., Keiding, K. and Nielsen, P.H. (1996). Extraction of extracellular polymers from activated sludge using a cation exchange resin. Wat. Res., 30, 1749-1758.
4. Gregory, J. (1989). Fundamentals of flocculation. Crit. Rev. Env. Contr., 19, 185-230.
5. Hermansson, M. (1999). The DLVO theory in microbial adhesion. Colloids Surfaces B: Biointerfaces, 14, 105-119.
6. Keiding, K., Wybrandt, L. and Nielsen, P.H. (2001). Remember the water - A comment on EPS colligative properties, Wat. Sci. Tech., 43(6), 17-24.
7. Li, D. and Ganczarczyk, J. (1991). Size distribution of activated sludge flocs. Res. J. WPCF, 63, 806-814.
8. Mikkelsen, L.H. (1999). A physico-chemical approach to the floc strength concept - With dewatering implications. Ph.D. thesis, Environmental Engineering Laboratory, Aalborg University, Denmark.
9. Mikkelsen, L.H. (2001). The shear sensitivity of activated sludge. Relation to sludge parameters. Coll. Surfaces A: Physicochem. Eng. Aspects, 182, 1-14.
10. Mikkelsen, L.H. and Keiding, K. (1999). Equilibrium aspects of the effects of shear and solids content on aggregate deflocculation. Adv. Colloid Interface Sci., 80, 151-182.
11. Mikkelsen, L.H. and Keiding, K. (2001). Effects of solids concentration on activated sludge deflocculation, conditioning and dewatering, Wat. Sci. Tech. 44(23), 417-425.
12. Mikkelsen, L.H. and Nielsen, P.H. (2001). Quantification of the bond energy of bacteria attached to activated sludge floc surfaces, Wat. Sci. Tech., 43(6), 67-75.
13. Mikkelsen, L.H. and Keiding, K. (2002a). Physico-chemical characteristics of full-scale sewage sludges with implications to dewatering, Wat. Res. 36, 2451-2462.
14. Mikkelsen, L.H. and Keiding, K. (2002b). The shear sensitivity of activated sludge: An evaluation of the possibility for a standardised floc strength test. Wat. Res. 36, 2931-2940.
15. Mikkelsen, L.H., Mascarenhas, T. and Nielsen, P.H. (2001). Deflocculation of excess activated sludge due to weakened adhesion forces during anaerobic storage prior to conditioning and dewatering (in preparation).
16. Nielsen, P.H. and Keiding, K. (1998). Disintegration of activated sludge flocs in the presence of sulfide. Wat. Res., 32(2), 313-320.
17. Parker, D.S., Kaufman, W.J. and Jenkins, D. (1970). Characteristics of biological flocs in turbulent regimes. SERL Report No. 70-5. 1970. University of California, Berkeley, Sanitary Engineering Research Laboratory.
18. Rasmussen, H., Bruus, J.H., Keiding, K. and Nielsen, P.H. (1994). Observations on dewaterability and physical, chemical and microbiological changes in anaerobically stored activated sludge from a nutrient removal plant, Wat. Res., 28, 417-425.
19. Raunkjær, K., Hvitved-Jacobsen, T. and Nielsen, P.H. (1994). Measurement of pools of protein, carbohydrate and lipid in domestic wastewater., Wat. Res., 28, 251-262.
20. Unz, R.F. (1987). Aspects of bioflocculation: An overview. In: Flocculation in Biotechnology and Separation Systems, edited by Y.A. Attia, pp. 351-368. Elsevier Science Publishers, Amsterdam.
21. Wahlberg, E.J., Keinath, T. and Parker, D.S. (1994). Influence of activated sludge flocculation time on secondary clarification, Wat. Envir. Res., 66, 779-786.
22. Wilén, B.-M., Nielsen, J.L., Keiding, K. and Nielsen, P.H. (2000a). Influence of microbial activity on the stability of activated sludge flocs, Colloids & Surfaces: Biointerfaces, 18(2), 145-156.
23. Wilén, B.-M., Keiding, K. and Nielsen, P.H. (2000b). Activated sludge floc deflocculation during anaerobic conditions and reflocculation during aerobic conditions, Wat. Res., 34, 3933-3942.