Effects of ZnO nanoparticles on wastewater treatment and their removal behavior in a membrane bioreactor

Bioresource Technology
Magdalene TanYen-Peng Ting

Abstract

Long-term effects of ZnO nanoparticles on the system performance of an MBR were investigated together with their removal behavior in the system. Continuous operation over 242days showed that ZnO NPs at both 1.0 and 10.0mg/L caused moderate deterioration in the removal of COD, nitrogen and phosphorus. Denitrification was affected upon the exposure but recovered subsequently. Although no significant acute effect on ammonia-oxidization was observed, permanent inhibition occurred after long-term exposure. Nitrite-oxidization was not affected even with 10.0mg/L ZnO NPs. Significant changes were observed in activated sludge properties which resulted in severe membrane fouling. Although ZnO NPs caused changes in the bacteria community structure, the diversity however remain unchanged. ZnO NPs was removed effectively in the MBR (>98%) with biosorption being a major removal mechanism. Membrane filtration also played an important role (20% of the total removal) especially at high ZnO NPs concentrations (around 10.0mg/L).

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Citations

Dec 18, 2015·The Science of the Total Environment·Maria P HerrlingHarald Horn
Aug 19, 2015·The Science of the Total Environment·Maria P HerrlingSusanne Lackner
Jul 21, 2016·Environmental Science & Technology·Connie Walden, Wen Zhang
Jul 8, 2017·Microscopy Research and Technique·Pabel Cervantes-AvilésGermán Cuevas-Rodríguez
Jan 9, 2016·Water Science and Technology : a Journal of the International Association on Water Pollution Research·Guanglei QiuYen-Peng Ting
Oct 27, 2018·Bioprocess and Biosystems Engineering·Dharmesh H Sur, Mausumi Mukhopadhyay
Jun 27, 2015·Water Science and Technology : a Journal of the International Association on Water Pollution Research·Xiong ZhengYinguang Chen
Aug 26, 2017·Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering·Dongqing ZhangWun Jern Ng
Mar 10, 2017·Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering·Dongqing ZhangYu Liu
Apr 9, 2021·Environmental Science and Pollution Research International·Ermelinda PratoFrancesca Biandolino

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