Abstract
Pollutants in municipal sewage include a complex mixture of soluble and insoluble constituents ranging in size from less than 0.001 μm up to over 100 μm [1]. Several studies have been addressed to the classification of contaminants in wastewater in terms of particle size. Balmat [2], Heukelekian and Balmat [3] and Rickert and Hunter [4], using a sequence of sedimentation, centrifugation and filtration, separated the contaminants into four size fractions: settleable (> 100 μm), supracolloidal (1–100 μm), colloidal (0.08–1 μm), and soluble (< 0.08 μm). On the basis of a sequential filtration of the wastewater, Munck et al. [5] used a slightly different definition of the four size ranges: settleable (> 106 μm), supracolloidal (3-106 μm), colloidal (0.025–3 μm), and soluble (< 0.025 μm). Notwithstanding the differences in the operating definition of the size ranges, these studies do agree that only a quarter or less of the COD of the raw sewage may be considered truly soluble [6]. The majority of the pollutant load is actually in suspended form, and is not easily biodegradable. In addition, other contaminants, such as heavy metals, bacteria and viruses, and organic micro pollutants (PCB, PAH) are strongly associated with the suspended phase.
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References
Levine, A.D., Tchobanoglous, G. and Asano, T. (1985) Characterization of the size distribution of contaminants in wastewater: treatment and reuse implications, J. W.P.C.F 57(7), 805–816.
Balmat, J.L. (1957) Biochemical oxidation of various particulate fractions of sewage, Sew. and Ind. Wastes 29, 757–761.
Heukelekian, H. and Balmat, J.L. (1959) Chemical composition of the particulate fraction of domestic sewage, Sew. and Ind. Wastes 31, 413–423.
Rickert, D.A. and Hunter, J.V. (1971) General nature of soluble and particulate organics in sewage and secondary effluent, Wat. Res. 5(7), 421–436.
Munck, R., Hwang, C.P. and Lackie, T.H. (1980) Wastewater fractions add to total treatment picture, Water and Sewage Works 127, 49–54.
Ødegaard, H. (1989) Appropriate technology for wastewater treatment in coastal tourist areas, Wat. Sci. Tech. 21(1), 1–17.
Harleman, D. and Murcott, S. (2001) An innovative approach to urban wastewater treatment in the developing world, Water 21 June 2001, 44–48.
Parker, D.S., Barnard, J., Daigger, G.T., Tekippe, R.J. and Wahlberg, E.J. (2001) The future of chemically enhanced primary treatment: evolution not revolution, Water 21 June 2001, 49–59.
Gambrill, M.P., Mara, D.D., Oragui, J.I. and Silva, S.A. (1989) Wastewater treatment for effluent reuse: lime-induced removal of excreted pathogens, Wat. Sci. Tech. 21(3), 79–84.
Gambrill, M.P., Mara, D.D. and Silva, S.A. (1992) Physicochemical treatment of tropical wastewater: production of microbiologic ally safe effluents for unrestricted crop irrigation, Wat. Sci. Tech. 26(7-8), 1449–1458.
Marani, D., Di Pinto, A.C., Ramadori, R. and Tomei, M.C. (1997) Phosphate removal from municipal wastewater with low lime dosage, Environ. Tech. 18, 225–230.
Rosinski, K. (2001) Effects of primary treatment optimization on energy savings and recovery in conventional activated sludge process, Master Thesis, Department of Civil Engineering, University of Toronto.
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© 2003 Springer Science+Business Media Dordrecht
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Marani, D., Ramadori, R., Di Pinto, A.C., Passino, R. (2003). Low Lime Coagulation for the Enhancement of Primary Treatment of Urban Wastewater. In: Arsov, R., Marsalek, J., Watt, E., Zeman, E. (eds) Urban Water Management: Science Technology and Service Delivery. NATO Science Series, vol 25. Springer, Dordrecht. https://doi.org/10.1007/978-94-010-0057-4_24
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DOI: https://doi.org/10.1007/978-94-010-0057-4_24
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