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The Use of Polymers in the Flotation Treatment of Wastewater

CSIRO Manufacturing, Clayton South, VIC 3169, Australia
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Processes 2019, 7(6), 374; https://doi.org/10.3390/pr7060374
Received: 27 May 2019 / Revised: 13 June 2019 / Accepted: 13 June 2019 / Published: 17 June 2019
(This article belongs to the Special Issue Feature Review Papers)
The use of flotation for the treatment of wastewaters in general, but especially for the removal of oil, grease, general organic matter, and suspended solids, is well established as a low energy process. Polyelectrolytes (PEs) can enhance performance without adding to the solids load that occurs with inorganic additives such as alum. The bridging of pollutants and the attachment of the resulting aggregates to the air-water interface can be effectively carried out with most wastewaters. Hydrophobic modification of the PEs can be useful for difficult species. It should be applied to the flotation of polyfluoroalkyl substances, for example, as they are not amenable to economical conventional treatment. Similarly, the removal of microplastic particles from sewage effluents by flotation could be enhanced. View Full-Text
Keywords: polymer; flotation; polyelectrolyte; wastewater; oil recovery; hydrophobic polymers polymer; flotation; polyelectrolyte; wastewater; oil recovery; hydrophobic polymers
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Bolto, B.; Xie, Z. The Use of Polymers in the Flotation Treatment of Wastewater. Processes 2019, 7, 374.

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