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Plugflow dissolved air flotation

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Abstract:

In a conventional rectangular flotation basin, acceptable separation efficiencies in excess of 90% can rarely be achieved with an operational surface loading in excess of 15 m/h, because of the great degree of dispersion, turbulence, and dead space present in the basin. A pilot-scale coaxial cylinder-type flotation column was built to fulfill the required plugflow performance, to reduce dead space, and to optimize the size. Using a step stimulus-response test, it was observed that the column exhibits near-plugflow performance within surface loading of 5 to 30 m/h. The influence of the air bubble cloud concentration in the stream on the degree of dispersion in the column was investigated. The performance of the pilot column has been verified for an industrial waste water under winter conditions.

Keywords: CLARIFICATION; COAGULATION; DISSOLVED AIR FLOTATION; MODEL; PLUGFLOW

Document Type: Research Article

DOI: http://dx.doi.org/10.2175/106143095X133266

Publication date: November 1, 1995

More about this publication?
  • Water Environment Research® (WER®) publishes peer-reviewed research papers, research notes, state-of-the-art and critical reviews on original, fundamental and applied research in all scientific and technical areas related to water quality, pollution control, and management. An annual Literature Review provides a review of published books and articles on water quality topics from the previous year.

    Published as: Sewage Works Journal, 1928 - 1949; Sewage and Industrial Wastes, 1950 - 1959; Journal Water Pollution Control Federation, 1959 - Oct 1989; Research Journal Water Pollution Control Federation, Nov 1989 - 1991; Water Environment Research, 1992 - present.
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