Title: A hybrid flotation: microfiltration cell for effluent treatment

Authors: Efrosyni N. Peleka; Nick K. Lazaridis; Kostas A. Matis

Addresses: Section of Chemical Technology, School of Chemistry, Aristotle University, GR-54124 Thessaloniki, Greece. ' Section of Chemical Technology, School of Chemistry, Aristotle University, GR-54124 Thessaloniki, Greece. ' Section of Chemical Technology, School of Chemistry, Aristotle University, GR-54124 Thessaloniki, Greece

Abstract: The investigated hybrid cell combines the advantages of both flotation and membrane filtration, while overcoming their limitations and having as outcome clean water from wastewater. The specific objective of the current paper was to apply the process for the efficient separation of effluents containing toxic metals (zinc cations and chromate anions). The main examined parameters were the sorbent material and flotation reagents concentration, the bubbles size and the backflushing required to reduce the fouling of membranes and to extend their useful operation time. Attention was also paid to the economics of this integrated process.

Keywords: bonding agents; hybrid flotation; heavy metal ions; heavy metals; metal removal; microfiltration; membrane filtration; wastewater treatment; zinc cations; chromate anions; sorbent materials.

DOI: 10.1504/IJEWM.2011.042636

International Journal of Environment and Waste Management, 2011 Vol.8 No.3/4, pp.273 - 285

Published online: 24 Jan 2015 *

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