Pervaporation membrane separation process for concentration of the organic compound and treatment of wastewater from specific organic compound containing wastewater

摘要

The present invention relates to a pervaporation membrane separation process capable of dehydrating wastewater containing a specific organic compound, such as NMP, and concentrating the specific organic compound, and simultaneously treating the wastewater. According to the pervaporation membrane separation process of the present invention, dehydration from wastewater containing a specific organic compound such as NMP and selectively separating the specific organic compound can be recycled by concentrating the organic compound to a high concentration of 70.0 to 99.0 wt%. At the same time, wastewater containing organic compounds at a low concentration of 0.5 wt% or less can be treated in an existing wastewater treatment plant without separate dilution and additional water treatment.