Performance evaluation in concentrating PEG solutions using forward osmosis membrane and different draw solutions

摘要

Polyethylene Glycol (PEG) has excellent property in lubricating, moisture retention, dispersion and antistatic charge applications. It has wide application in many industries, especially in solar and semiconductor industries. Huge amount of wastewater containing 2-3% PEG (MW150-300) in these industries was produced each year. It has been calculated that to produce 1 ton PEG, indirectly, 8.6 tons oil was consumed. Therefore, recovering PEG from wastewater not only reduces pollution but also conserves resources. However, PEG has good solubility in water and good compatibility with a number of organic groups, this makes it difficult to recover, using traditional separation methods.