Performance of a Hybrid ED–NF Membrane System for Water Recovery Improvement via NOM Fouling Control
نویسندگان
چکیده
Natural organic matter (NOM) complicates water treatment and causes formation of disinfection byproducts (DBPs). NOM is removed well by nanofiltration (NF) but extensive membrane fouling, especially in the presence divalent cations. This research investigated a hybrid electrodialysis-nanofiltration (ED–NF) system to treat freshwaters containing hardness NOM. ED removes most ions little no NOM, diluate is, then, treated with NF remove reduced fouling. Subsequently, some or all concentrate can be mixed permeate increase recovery, limit concentration (and thereby reduce DBPs), control ion content. Compared alone, ED–NF increases product yield. fouling was removal cations ED. Spectroscopic resonant scattering measurements fouled membranes near calcium K-edge reveal significant contribution bridging between carboxyl groups on surface. novel allows several “knobs” recovery DBP potential adjusting concentrate) ionic composition, fraction remixed form water.
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ژورنال
عنوان ژورنال: ACS ES&T engineering
سال: 2021
ISSN: ['2690-0645']
DOI: https://doi.org/10.1021/acsestengg.1c00153