COMBINED MEMBRANE SEPARATION PROCESS FOR CONCENTRATING IPA FROM WASTEWATER CONTAINING IPA AND TREATING WASTEWATER

摘要

The present invention relates to a combined membrane separation process for concentrating IPA from wastewater containing IPA and treating wastewater, and more specifically, to a combined membrane separation process capable of separating and concentrating IPA from wastewater containing IPA and simultaneously treating wastewater by combining a pervaporation membrane separation process and a reverse osmosis membrane separation process. According to the combined membrane separation process of the present invention, IPA can be selectively separated from IPA washing wastewater and concentrated to 30 wt% or more, thereby recycling the same, and simultaneously, IPA washing wastewater having a low concentration of 0.5 wt% or less can be treated, as is, in a conventional wastewater treatment plant without separate dilution.