Journal of Chemical Engineering & Process Technology
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Varun Sharma

Publications

• Research Article
  Treatment of Steel Rolling Mill Effluents Using Semi-Batch Foam Flotation
  Author(s): Varun Sharma and Ashok N Bhaskarwar Varun Sharma and Ashok N Bhaskarwar
  
  A semi-batch foam-flotation in which air is continuously sparged through an emulsion, with added surfactant, a coagulant, and a solvent, has been shown to be effective in the treatment of steel-rolling mill effluents. The effect of time of flotation, effects of surfactant and alum concentrations, and effect of the solvent volume were all experimentally explored. The oil recovery increased with concentrations of alum and sodium lauryl sulphate of up to around 4 g/l, and then leveled off. Volume of the solvent layer at the top improved the separation of oil with an optimum ratio of 0.167 ml solvent per ml of emulsion. The oil separation was highest for the time of flotation of about 25 minutes, and reemulsification of the separated self-emulsifiable oil was observed beyond this time. A model reported in the literature for the semi-batch flotation has been shown to be inadequate in predicti.. View More»
  DOI: 10.4172/2157-7048.1000263

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