Advanced treatment combination for groundwater recharge of municipal wastewater by nanofiltration and ozonation

摘要

This paper presents the results of research undertaken on an advanced treatment combination for polishing municipal wastewater with the purpose of a safe groundwater recharge. The results of a former study of DWQC initiated this research. It is envisaged that tertiary effluent is nanofiltrated to reject dissolved organic carbon (DOC) and adsorbable organic halogens (AOX) to concentrations less than 2-3 mg DOC/L respectively <20 mug AOX/L. The rrine will be given back in a recycling process to the sewage treatment plant after passing an oxidation step. To avoid rising scaling potential and other negative impacts due to increasing salinity, the rejection characteristics of several NF-membranes were investigated.