Flocs’ morphology and stability in suspensions obtained in water treatment process

• Autorzy: Banaś M.
• Języki publikacji: EN

Abstrakty

EN

Purpose: In this paper, an attempt was made to apply fractal geometry for the description of morphology of the particles found in the selected crude and coagulated suspensions derived from the water conditioning process. When morphology of such suspensions was determined, particular attention was paid to their stability and influence of hydrodynamic conditions on both morphology and stability of their particles. Design/methodology/approach: Particle composition was examined using Low Angle Laser Light Scattering method and presented in volumetric particle size and parameters of log-normal distribution. Particles’ shape and morphology was characterized by fractal dimension by means of light scattering method. Findings: Fractal geometry is powerful tool for characterizing of non-grain suspension. Fractal dimension is very sensitive factor in terms to hydrodynamic and analytic conditions. Practical implications: Determining the nature and properties of the suspensions treated undergoing coagulation and sedimentation process in settlers. Originality/value: Application of the fractal dimension to design and use of the sedimentation devices in order to characterize the properties of solid phase of suspensions.

Słowa kluczowe

EN

particle composition of suspension; water treatment; fractal dimensions of floculated suspension; sedimentation

• Wydawca: International OCSCO World Press
• Czasopismo: Journal of Achievements in Materials and Manufacturing Engineering
• Rocznik: 2012
• Tom: Vol. 55, nr 2
• Strony: 299--306
• Opis fizyczny: Bibliogr. 18 poz., rys.

Twórcy

autor

Banaś M.

• Department of Power Systems and Environmental Protection Devices, AGH University of Science and Technology, Al. Mickiewicza 30, 30-059 Kraków, Poland

Bibliografia

• [1] Guidelines for Drinkingwater Quality, Third edition, World Health Organization, Geneva, 2008.
• [2] Minister of Health regulation dated 20.04.2010 amending the regulation on the quality water for human consumption. Journal of Laws of the Republic of Poland 10.72.466 (in Polish).
• [3] W.P. Kowalski, M. Banaś, K. Kołodziejczyk, R. Mięso, T. Zacharz, The application of lamella sedimentation devices in purifying of water and water wastes, UWND AGH, Cracow, 2004.
• [4] W.P. Kowalski, K. Kołodziejczyk, T. Zacharz, The investigations of a lamella concurrent sedimentation process, Chemical and Process Engineering 22 (2001) 777-782.
• [5] K. Kołodziejczyk, T. Zacharz, The suspension purification in the combined co-current and counter-current sedimentation process - Empirical model, Chemical and Process Engineering 25 (2004) 1107-1113.
• [6] W.P. Kowalski, Lamella sedimentation - the state of art and directions of development, Chemical and Process Engineering 25 (2004) 1163-1170.
• [7] M. Banaś, The dependence of sedimentation efficiency on suspension concentration, Chemical and Process Engineering 25/3I (2004) 659-664.
• [8] W.P. Kowalski, Investigation of fine grains distribution using the sedimentation analysis, Journal of Materials Processing Technology 157-158(2004) 561-565.
• [9] British Standard BS 2955:1993, Glossary of terms relating to particle technology, 1993.
• [10] P. Jarvis, B. Jefferson, S. Parsons, Measuring floc structural characteristics, Reviews in Environmental Science and Biotechnology 4 (2005) 1-18.
• [11] B. Mandelbrot, The fractal geometry of nature, W.H. Freeman, New York, 1982.
• [12] M.Y. Lin, H.M. Lindsay, D.A. Weitz, R.C. Ball, R. Klein, P. Meakin, Universality of Fractal Aggregates as Probed by Light Scattering, Proceedings of the Royal Society of London A 423(1987) 71-87.
• [13] B.E. Logan, J.R. Klips, Fractal Dimensions of Aggregates Formed in Different Fluid Mechanical Environments, Water Resources 29 (1995) 443-453.
• [14] C.P. Johnson, X.Li, B.E. Logan, Settling velocities of fractal aggregates, Environmental Science and Technology 30 (1996) 1911-1918.
• [15] B.E. Logan, Environment transport processes, John Wiley and Sons Inc, New York, 1999.
• [16] C.M. Sorensen, N. Lu, J. Cai, Fractal cluster size distribution measurement using static light scattering, Journal of Colloid and Interface Science 174 (1996) 456.
• [17] G. Bushell, R. Amal, Measurement of fractal aggregates of polydisperse particles using small-angle light scattering, Journal of Colloid Interface Science 221 (2000) 186-194.
• [18] Malvern Instruments. Mastersizer 2000 - Operation Manual Worcester, 2007.