A methodological approach for direct quantification of the activated sludge floc size distribution by using different techniques

Water Science and Technology

Volumn 60, Issue 7, 2009, Pages 1857-1867

  Govoreanu, R ^a,b   Saveyn, H ^a   Van Der Meeren, P ^a   Nopens, I ^a   Vanrolleghem, P A ^a,c  

^a GHENT UNIVERSITY   (Belgium)

^b JANSSEN RESEARCH AND DEVELOPMENT   (Belgium)

^c UNIVERSITÉ LAVAL   (Canada)

Author keywords

Activated sludge; Dynamic image analysis; Floc size distribution; Sizing techniques

Indexed keywords

ACCURATE MEASUREMENT; ACTIVATED SLUDGE; ACTIVATED SLUDGE FLOCS; DILUTION FACTORS; DYNAMIC IMAGE ANALYSIS; EXPERIMENTAL CONDITIONS; FLOC SIZE DISTRIBUTION; GAIN INSIGHT; HIGH CONCENTRATION; HYDRAULIC FLOW; LASER DIFFRACTIONS; MEASUREMENT TECHNIQUES; METHODOLOGICAL APPROACH; NONSPHERICAL PARTICLE; PARTICLE SHAPE; PROCESS VISUALIZATION; SAMPLE DILUTION; SIZE DETECTION; SIZE RANGES; SMALL SIZE; TIME OF TRANSITIONS;

BIOACTIVITY; FLOCCULATION; IMAGE ANALYSIS; SIZE DETERMINATION; SIZE DISTRIBUTION; TIME SERIES ANALYSIS; VISUALIZATION;

DYNAMIC ANALYSIS;

ACTIVATED SLUDGE; EXPERIMENTAL STUDY; IMAGE ANALYSIS; SAMPLING; SIZE DISTRIBUTION; VISUALIZATION;

ARTICLE; FLOCCULATION; IMAGE ANALYSIS; LASER DIFFRACTION; PARTICLE SIZE; SLUDGE; CHEMISTRY; LASER; METHODOLOGY; SEWAGE;

GLASS; SILICON DIOXIDE;

FLOCCULATION TESTS; GLASS; LASERS; PARTICLE SIZE; SEWAGE; SILICON DIOXIDE; WASTE DISPOSAL, FLUID;

EID: 73349106514     PISSN: 02731223     EISSN: None     Source Type: Journal    
DOI: 10.2166/wst.2009.535     Document Type: Article

References (20)

1. Andreadakis, A. D. 1993 Physical and chemical properties of activated sludge floc. Water Res. 27(12), 1707-1714. (Pubitemid 272908)
2. Barbusinski, K. & Koscielniak, H. 1995 Influence of substrate loading intensity on floc size in activated sludge process. Water Res. 29(7), 1703-1710.
3. Biggs, C. A. 2000 Activated sludge flocculation: investigating the effect of shear rate and cation concentration on flocculation dynamics. PhD Thesis, University of Queensland, Australia.
4. Biggs, C. A. & Lant, P. A. 2000 Activated sludge flocculation: on-line determination of floc size and the effect of shear. Water Res. 34(9), 2542-2550.
5. De Clercq, B., Lant, P. A. & Vanrolleghem, P. A. 2004 Focused beam reflectance technique for in situ particle sizing in wastewater treatment settling tanks. J. Chem. Technol. Biotechnol. 79, 610-618.
6. Galil, N., Stahl, N., Novak, T. J. & Rebhun, M. 1991 The influence of mixing on the physical characteristics of biological flocs. Res. J. WPCF 63(5), 768-772.
7. Grijspeerdt, K. & Verstraete, W. 1997 Image analysis to estimate the settleability and concentration of activated sludge. Water Res. 31(6), 1126-1134. (Pubitemid 27192550)
8. Govoreanu, R. 2004 Activated sludge flocculation dynamics: on-line measurement methodology and modeling. PhD Thesis, Ghent University, Belgium.
9. Govoreanu, R., Seghers, D., Nopens, I., De Clercq, B., Saveyn, H., Capalozza, C., Van der Meeren, P., Verstraete, W., Top, E. & Vanrolleghem, P. A. 2003 Linking floc structure and settling properties to activated sludge population dynamics in an SBR. Water Sci. Technol. 47(12), 9-18.
10. Govoreanu, R., Saveyn, H., Van der Meeren, P. & Vanrolleghem, P. A. 2004 Simultaneous determination of activated sludge floc size distribution by different techniques. Water Sci. Technol. 50(12), 39-46.
11. Guan, J., Waite, T. D. & Amal, R. 1998 Rapid structure characterization of bacterial aggregates. Environ. Sci. Technol. 32, 3735-3742.
12. Li, D. H. & Ganczarczyk, J. J. 1991 Size distribution of activated sludge flocs. R. J. WPCF 63(5), 806-814.
13. Mikkelsen, L. H., Gotfredsen, A. K., Agerbćk, M. A., Nielsen, P. H. & Keiding, K. 1996 Effects of colloidal stability on clarification and dewatering of activated sludge. Water Sci. Technol. 34(3-4), 449-457.
14. Nopens, I., Koegst, T., Mahieu, K. & Vanrolleghem, P. A. 2005 PBM and activated sludge flocculation: from experimental data to calibrated model. AIChE J. 51(5), 1548-1557. (Pubitemid 40763673)
15. Pons, M. N., Milferstedt, K. & Morgenroth, E. 2006 Modeling of chord length distributions. Chem. Eng. Sci. 61(12), 3962-3973.
16. Robertson, B. R., Button, D. K. & Koch, A. L. 1998 Determination of the biomass of small bacteria at low concentrations in a mixture of species with forward light scatter measurements by flow cytometry. Appl. Environ. Microbiol. 64(10), 3900-3909.
17. Saveyn, H., Mermuys, D., Thas, O. & Van der Meeren, P. 2002 Determination of the refractive index of water-dispersible granules for use in laser diffraction experiments. Part. Part. Syst. Charact. 19(6), 1-7.
18. Saveyn, H., Thu, T. L., Govoreanu, R., Van der Meeren, P. & Vanrolleghem, P. 2006 In-line comparison of particle sizing by static light scattering, time-of-transition and dynamic image analysis. Part. Part. Syst. Charact. 23(2), 145-153.
19. Twardowski, M. S., Boss, E., MacDonald, J. B., Pegau, W. S., Bernard, A. H. & Zaneveld, J. R. V. 2001 A model for estimating bulk refractive index from the optical backscattering ratio and the implications for understanding particle composition in case I and case II waters. J. Geophys. Res. 107(C7), 14129-14142.
20. Wilén, B.-M. & Balmer, P. 1999 The effect of dissolved oxygen concentration on the structure, size and size distribution of activated sludge flocs. Water Res. 33(2), 391-400. (Pubitemid 28554651)