Bench-scale investigation of an integrated adsorption–coagulation–dissolved air flotation process for produced water treatment

Bench-scale investigation of an integrated adsorption–coagulation–dissolved air flotation process for produced water treatment

Type	Journal Article
Author	Jessica M. Younker
Author	Margaret E. Walsh
URL	http://www.sciencedirect.com/science/article/pii/S2213343713002248
Volume	2
Issue	1
Pages	692-697
Publication	Journal of Environmental Chemical Engineering
Date	March 2014
Abstract	Produced water contains organics which may be free, dispersed, or dissolved in the water. While certain dissolved compounds may contribute to environmental risk from produced water, current North American discharge regulations only address the dispersed fraction of oil and grease. Researchers studied, at bench scale, chemical coagulation with ferric chloride (FeCl3) and adsorption with organoclay (OC) in a completely stirred tank reactor (CSTR) configuration as pre-treatment for dissolved air flotation (DAF) for the removal of dissolved and dispersed oils from produced water. The integrated process was evaluated and compared to the individual processes of coagulation-DAF, adsorption-DAF and DAF without pre-treatment for the removal of dispersed oil, naphthalene and phenol from synthetic produced water.