Browse > Article

Development of Dissolved Air Flotation Technology from 1st Generation to the Newest or 3rd One (Very Thick Microbubble Bed) with High Flowrates DAF in Turbulent Flow Conditions  

Kiuru, H.J. (Dept. of Water and Wastewater Engineering, Helsinki University of Technology)
Publication Information
Journal of Korean Society of Water and Wastewater / v.18, no.2, 2004 , pp. 228-234 More about this Journal
Abstract
Dissolved air flotation (DAF), in which suspended solids are removed from water by means of micro-size air bubbles raising slowly up in water and lifting solids from water (smaller than those) attached onto the micro-bubbles as well as those (larger than solids) being attached on these, have been used in water and wastewater since 1920s. The dissolved air flotation technology was originally based on the laminar flow conditions prevailing in water to be treated, but the latest development in that technology has led now to a situation, in which the flow conditions may also be turbulent ones in the modem dissolved air flotation units. Despite of that, the flotation phenomenon used in this unit operation for removal suspended solids from water or wastewater is still the same.
Keywords
Dissolved air flotation; creation of micro-bubbles; control of hydraulics; flow conditions; high flowrate DAF;
Citations & Related Records
연도 인용수 순위
  • Reference
1 Edzwald,J., (1995) Principles and applications of DAF, Water S챠두ce and Tecb., 31, pp. 1-23
2 Han, M. Y, (2002). Modeling of DAF: the effect of particle and bubble characteristics, AQUA, 51(1), pp.27-34
3 Sander E. de Rijk et al.,(1994), Bubble size in flotation thickening, Water Research, 28(2), 465-473
4 Vlaski A. et al., (1997) Algal laden watertreatment by dissolved air flotation, CJWEM, pp.215-238
5 Schulze, H. J., (1984) Physico-chemical elementary processes in flotation, Elsevier
6 Edzwald, J., (1997) Contact zone modelling and the role of pretreatment in DAF performance, Dissolved Air flotation, ClWEM, London, pp.9-23
7 Fukushi, K, Tambo, N., Matui, Y., (1994) A kinetic modelfor dissolved air flotation in water and wastewater treatment, Proceedings of IAQW-IWSA-AWWA Joint Specialized Conference, Orlando, pp. 13-22
8 Jokela P., (1997) Dissolved air flotation treatment of surface waters for high quality process water in the foreset industry, CIWEM, pp.417-428
9 Krofta, M., Wang,L.X, (1982) Potable water treatment by DAF and filtration,J. of AWWA, pp. 305-310
10 Zabel, T.,(1985) Advantages of DAF for water treatment, J. of AWWA, 5, pp.42-46
11 Haarhoff J., (1997) Towards the maximal utilization of air in Dissolved Air Flotation, CIWEM, pp. 25-34
12 Edzwald, J., Olson, S.C., Tamulonis, C.W., (1994) DAF: Field Investigations, AWWA Reseach Foundation
13 Eades, A.,Jordan, D., Scheidler, S., (1997) Counter-current Dissolved Air Flotation COCO-DAFF, Dissolved Air Flotation, ClWEM, London, pp. 323-340
14 Edzwald, J., (1993) Coagulation in drinking water treatment: particles, organics and coagulants, Water Saence and Tech., 27,pp.21-35