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Dissolved air flotation modelling: insights and shortcomings

2004; UWA Publishing; Volume: 53; Issue: 3 Linguagem: Inglês

10.2166/aqua.2004.0012

1365-2087

Johannes Haarhoff, James K. Edzwald,

Minerals Flotation and Separation Techniques

Research Article| May 01 2004 Dissolved air flotation modelling: insights and shortcomings Johannes Haarhoff; Johannes Haarhoff 1Rand Afrikaans University, PO Box 524, 2006 Auckland Park, South Africa E-mail: jh@ing.rau.ac.za Search for other works by this author on: This Site PubMed Google Scholar James K. Edzwald James K. Edzwald 2University of Massachusetts, Amherst, MA 01003, USA Search for other works by this author on: This Site PubMed Google Scholar Journal of Water Supply: Research and Technology-Aqua (2004) 53 (3): 127–150. https://doi.org/10.2166/aqua.2004.0012 Views Icon Views Article contents Figures & tables Video Audio Supplementary Data Share Icon Share Twitter LinkedIn Tools Icon Tools Cite Icon Cite Permissions Search Site Search nav search search input Search input auto suggest search filter All ContentAll JournalsThis Journal Search Advanced Search Citation Johannes Haarhoff, James K. Edzwald; Dissolved air flotation modelling: insights and shortcomings. Journal of Water Supply: Research and Technology-Aqua 1 May 2004; 53 (3): 127–150. doi: https://doi.org/10.2166/aqua.2004.0012 Download citation file: Ris (Zotero) Reference Manager EasyBib Bookends Mendeley Papers EndNote RefWorks BibTex The use of relatively simple but conceptually sound mathematical models is a powerful tool to identify and understand variables that affect the performance of a process. Such models have been used to better understand the many and complex dissolved air flotation (DAF) variables that are in play when water, flocs and air bubbles are mixed in the contact zone and then removed in the separation zone. The first purpose of this paper is to examine critically models that have been previously developed, primarily by the authors, for the contact and separation zones, and to summarize the insights gained from these efforts.During the past 5–10 years, significant strides were made towards more efficient designs that allow reduced flocculation time and much higher hydraulic loading rates. These developments have also exposed some fundamental weaknesses in the traditional modelling approaches, as some systems are now working beyond the theoretical limits of feasibility. The second purpose of the paper, therefore, is to probe these weaknesses and to suggest some directions for future modelling efforts. air bubbles, contact zone, dissolved air flotation, floc, models, separation zone This content is only available as a PDF. © IWA Publishing 2004 You do not currently have access to this content.