Removal of emulsified oil with organic coagulants and dissolved air flotation

Journal Article · Wed Feb 01 00:00:00 EST 1978 · J. Water Pollut. Control Fed.; (United States)

OSTI ID:5030851

Luthy, R G ^[1]; Selleck, R E; Galloway, T R

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1. Carnegie-Mellon Univ., Pittsburgh

On-line dissolved air flotation pilot plant studies demonstrated that oil could be removed from refinery American Petroleum Institute separator effluents to levels of 10 mg/l with a 15 mg/l dose of 75% charged polydiallyldimethylammonium polymer without the assistance of alum or ferric coagulants. Both influent oil concentrations and oil removal efficiencies were considerably higher than previously reported values. Best oil removal corresponded to a polymer dose which gave net zero oil droplet charge. However, efficient polymer bridging between oil droplets was also necessary, as optimum oil removal was dependent upon the degree to which the polymer was substituted with functional groups. It was shown that good floculation yielded good flotation. The process was dependent upon oil droplet size with respect to flotation, but not dependent upon oil droplet concentration with respect to depletion of polymer by adsorption. Performance may be improved if surface active agents and excessive amounts of nonextractable suspended solids are not released to wastewaters destined for dissolved air flotation treatment.

• OSTI ID: 5030851
• Journal Information: J. Water Pollut. Control Fed.; (United States), Vol. 50:2
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
PETROLEUM REFINERIES
CHEMICAL EFFLUENTS
WASTE OILS
WASTE PROCESSING
ELECTROLYTES
FLOCCULATION
FLOTATION
OILS
PILOT PLANTS
POLYMERS
SEPARATION PROCESSES
FUNCTIONAL MODELS
MANAGEMENT
ORGANIC COMPOUNDS
OTHER ORGANIC COMPOUNDS
PRECIPITATION
PROCESSING
WASTE MANAGEMENT
020800* - Petroleum- Waste Management