Three Stages of Consolidation Dewatering of Sludges
Publication: Journal of Environmental Engineering
Volume 125, Issue 10
Abstract
This work investigates the constant-pressure consolidation characteristics of three different sludge samples, with particular emphasis on the tertiary consolidation stage. The refined Terzaghi-Voigt rheological model is applied to interpret the data and, in doing so, to evaluate the model parameters. Experimental results indicate that the tertiary consolidation stage is commonly found in sludge that contains a large amount of bound water. In addition, it was found that consolidation pressure and polymer conditioning would markedly affect the moisture distribution. Results obtained from conventional analysis are compared with those of the refined model.
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References
1.
Chang, I. L., Chu, C. P., and Lee, D. J. (1997a). “Filtration followed by expression characteristics of polymer flocculated clay sludge.” J. Colloid and Interface Sci., 185(2), 335–342.
2.
Chang, I. L., Chu, C. P., and Lee, D. J. (1997b). “Electrokinetic property effects on expression characteristics of clay sludge.” J. Envir. Sci. Health A, 32(5), 1591–1604.
3.
Chang, I. L., Chu, C. P., Lee, D. J., and Huang, C. (1997c). “Filtration followed by expression characteristics of alum coagulated clay sludge.” Envir. Sci. and Technol., 31(5), 1313–1319.
4.
Chang, I. L., and Lee, D. J. (1996). “Expression dewatering of mixed sludges.” Spectroscopy Letters, 29(8), 1659–1672.
5.
Chang, I. L., and Lee, D. J. (1998). “Ternary expression stage in activated sludge dewatering.” Water Res., 32(3), 905–915.
6.
Chen, G. W., Lin, W. W., and Lee, D. J. (1996). “Use of capillary suction time as a measure of sludge dewaterability.” Water Sci. and Technol., 34(3–4), 443–448.
7.
Chu, C. P., Lee, D. J., and Huang, C. (1998). “The role of ionic surfactants in compression dewatering of alum sludge.” J. Colloid and Interface Sci., 206(1), 181–188.
8.
Cleveland, T. G., Tiller, F. M., and Lee, J. B. (1996). “Theory of filtration of highly compactable biosolids.” Water Sci. and Technol., 34(1–2), 299–306.
9.
Kawasaki, K., Matsuda, A., and Murase, T. (1990). “The effects of freezing and thawing process on the expression characteristics and final moisture content of excess activated sludge.” Kagaku Kogaku Ronbunshu, Tokyo, 16(6), 1241–1246.
10.
Kawasaki, K., Matsuda, A., and Murase, T. (1994). “The effects of a freezing and thawing process on the expression characteristics and final moisture content of excess activated sludge.” Int. Chem. Engrg., 34(3), 403–409.
11.
Lee, D. J. (1994). “Floc structure and bound water content in excess activated sludges.” J. Ch. I. Ch. E., Taipei, Taiwan, 25(4), 201–207.
12.
Lee, D. J., and Hsu, Y. H. (1995). “Measurement of bound water in sludge: A comparative study.” Water Envir. Res., 67(3), 310–317.
13.
Lee, D. J., and Wang, C. H. (1999). “Theories of cake filtration and consolidation and implications to sludge dewatering.” Water Res., accepted for publication.
14.
Li, D. H., and Ganczarczyk, J. J. (1989). “Fractal geometry of particle aggregates generated in water and wastewater treatment process.” Envir. Sci. and Technol., 23(11), 1385–1389.
15.
Li, D. H., and Ganczarczyk, J. J. (1990). “Structure of activated sludge flocs.” Biotechnol. Bioengrg., 35(1), 57–65.
16.
Shirato, M., Murase, T., Hayashi, N., and Fukushima, T. (1977). “Constant pressure expression of solid-liquid mixtures with medium resistance.” J. Chem. Engrg. Japan, 10(1), 154–159.
17.
Shirato, M., Murase, T., Kato, H., and Fukaya, S. (1970). “Fundamental analysis for expression under constant pressure.” Filtr. Sep., 7(3), 277–282.
18.
Shirato, M., Murase, T., Tokunaga, A., and Yamada, O. (1974). “Calculations of consolidation period in expression operations.” J. Chem. Engrg. Japan, 7(3), 229–231.
19.
Tiller, F. M., and Yeh, C. S. (1987). “The role of porosity in filtration. Part XI: Filtration followed by expression.” AIChE J., 33(8), 1241–1256.
20.
Vesilind, P. A. (1979). Treatment and disposal of wastewater sludges. Ann Arbor Science, Ann Arbor, Mich.
21.
Vesilind, P. A. (1994). “The role of water in sludge dewatering.” Water Envir. Res., 66(1), 4–10.
22.
Wu, C., Huang, C., and Lee, D. J. (1997). “Effects of polymer dose on alum sludge dewaterability characteristics and physical properties.” Colloids Surf. A., 122(1–3), 89–96.
Information & Authors
Information
Published In
Journal of Environmental Engineering
Volume 125 • Issue 10 • October 1999
Pages: 959 - 965
History
Received: Oct 22, 1998
Published online: Oct 1, 1999
Published in print: Oct 1999
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