Evaluating the effects of metal oxide nanoparticles (TiO2, Al2O3, SiO2 and CeO2) on anammox process: Performance, microflora and sludge properties. (October 2018)

• Record Type: Journal Article
• Authors: Zhang, Zheng-Zhe; Cheng, Ya-Fei; Xu, Lian-Zeng-Ji; Bai, Yu-Hui; Xu, Jia-Jia; Shi, Zhi-Jian; Shen, Yang-Yang; Jin, Ren-Cun
• Is Part Of: Bioresource technology. Volume 266(2018)
• Page Start: 11
• Page End: 18
• Publication Date: 2018-10
• Subjects: Anammox -- Metal oxide nanoparticles -- Granular sludge -- Nitrogen removal -- High-throughput sequencing; Biomass -- Periodicals; Biomass energy -- Periodicals; Bioremediation -- Periodicals; Agricultural wastes -- Periodicals; Factory and trade waste -- Periodicals; Organic wastes -- Periodicals; Bioénergie -- Périodiques; Déchets agricoles -- Périodiques; Déchets industriels -- Périodiques; Déchets organiques -- Périodiques; Déchets (Combustible) -- Périodiques; 662.88
• DOI: 10.1016/j.biortech.2018.06.052
• Languages: English
• ISSNs: 0960-8524

Abstract

Graphical abstract: Highlights: The impacts of MONPs on anammox process were first investigated. The increase of MONPs to 200 mg L −1 had no adverse effects on anammox performance. The differentiation of anammox community occurred after exposed to different MONPs. Sludge properties responded differently to the exposure of MONPs. Abstract: The increasing use of engineered metal oxide nanoparticles (MONPs) in consumer products raises great concerns about their environmental impacts, but their potential impacts on anaerobic ammonium oxidation (anammox) process in wastewater treatment remain unclear. In this study, the presence of MONPs (1, 50, 200 mg L −1 ) exhibited no visible effects on the nitrogen removal performance of anammox reactors, but high levels (200 mg L −1 ) of SiO2 NPs, Al2 O3 NPs and CeO2 NPs had a distinct effect on shaping the anammox community. Long-term exposure of MONPs caused different responses in the relative abundance of Ca. Kuenenia, the level of functional gene Hzs A and the activities of three key enzymes involved in anammox metabolism, but no significant inhibition effects on specific anammox activity were detected. Overall, the effects of MONPs on anammox community structure and sludge properties depended on their types and levels and followed the order SiO2 > CeO2 > Al2 O3 > TiO2 .