Emulsion Liquid Membrane Extraction of Phenolics from Industrial WastewatersEPA Contract Number: 68D10066
Title: Emulsion Liquid Membrane Extraction of Phenolics from Industrial Wastewaters
Investigators: Wright, John D.
Small Business: TDA Research Inc.
EPA Contact: Manager, SBIR Program
Project Period: September 1, 1991 through December 1, 1994
Project Amount: $150,000
RFA: Small Business Innovation Research (SBIR) - Phase II (1991) Recipients Lists
Research Category: Small Business Innovation Research (SBIR)
Phenolic compounds are the primary wastewater treat- ment challenge found in the aqueous effluents from petro- leum refineries, coal conversion processes, petrochemical production, and the manufacture of phenols and related chemicals. Emulsion liquid membrane (ELM) separations are a developing technology with high potential for cost- effective removal and recovery of phenolic compounds. Unlike the current treatment technologies, ELM processes can almost completely remove phenolics from both high and low concentration feed streams, while producing a concentrated solute level in the stripping phase, simplifying final recovery. Further, ELM offers independent control over the solvent's solubility in water and its affinity for phenol, eliminating the need for a stripping column to clean the wastewater leaving the extractor. As a result, ELM is a much less expensive process for wastewater treatment than solvent extraction, the current technology of choice.
In Phase I, TDA Research, Inc., demonstrated the feasi- bility of the ELM extraction process. During Phase II, TDA will demonstrate the feasibility of the complete treatment process, including not only extraction, but emulsion coales- cence and phase separation. The objectives are to optimize the extraction in a low-cost contacting device, optimize the electrostatic coalescence process, demonstrate the entire system, and use the results of the complete process demon- stration as the basis for the detailed design and economic analysis of a full scale treatment plant.