Biological magnetic ion exchange resin on advanced treatment of synthetic wastewater

[Display omitted] •Biological ion exchange employing magnetic resin was established (bio-MIEX).•Bio-MIEX presented the best removal of DOC (84%) and ibuprofen (100%) after 50 d.•The ATP amount of bio-MIEX was 1.48 µg/g and the protein amount was 2.11 mg/g.•Bio-MIEX showed the highest microbial diver...

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Bibliographic Details
Published in:Bioresource technology 2023-03, Vol.372, p.128613-128613, Article 128613
Main Authors: Xu, Shanshan, Yan, Yunbao, Shuang, Chendong, Zhou, Qing, Ji, Rong, Li, Aimin
Format: Article
Language:English
Subjects:
Biocarrier
Biological ion exchange
Charcoal
Dissolved organic carbon
Ibuprofen
Ion Exchange
Ion Exchange Resins
Magnetic resin
Secondary effluent
Wastewater
Water Pollutants, Chemical - analysis
Water Purification - methods
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Summary:[Display omitted] •Biological ion exchange employing magnetic resin was established (bio-MIEX).•Bio-MIEX presented the best removal of DOC (84%) and ibuprofen (100%) after 50 d.•The ATP amount of bio-MIEX was 1.48 µg/g and the protein amount was 2.11 mg/g.•Bio-MIEX showed the highest microbial diversity, dominated by Aquitalea (14.9%).•The superior performance of bio-MIEX was due to the presence of Fe3O4. In this work, three biological ion exchange systems and one biological activated carbon (BAC) system were established by employing magnetic ion exchange resin (MIEX), non-magnetic resin (NIEX), polystyrenic resin (DIEX) and granular activated carbon as the biocarrier for advanced treatment of wastewater. Dissolved organic carbon (DOC) removal of four systems all stabilized at about 84% due to biodegradation. The start-up period of bio-MIEX (nearly 40 d) was greatly shorter than that of others (nearly 190 d). Ibuprofen removal was ascribed to adsorption in the initial stage, which subsequently changed to the effect of biodegradation. After the start-up period, ibuprofen removal was nearly 100% (bio-MIEX), 60% (bio-NIEX), 61% (bio-DIEX) and 89% (BAC). According to the surface observation, ATP and protein measurement and metagenomic analysis, the superior performance of bio-MIEX could be attributed to its highest biological activity resulted from the presence of Fe3O4 rather than polymer matrix and surface roughness.
ISSN:0960-8524
1873-2976
DOI:10.1016/j.biortech.2023.128613