Accumulation of TiO2 Nanoparticles in the Anammox Bioreactor: Their Effects on Treatment Performance and Microbial Dynamics

Sarı T., Akgül D., Mertoğlu B.

BIOCHEMICAL ENGINEERING JOURNAL, cilt.187, sa.2022, ss.1-37, 2022 (SCI-Expanded)

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 187 Sayı: 2022
  • Basım Tarihi: 2022
  • Doi Numarası: 10.1016/j.bej.2022.108595
  • Dergi Adı: BIOCHEMICAL ENGINEERING JOURNAL
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, PASCAL, Aquatic Science & Fisheries Abstracts (ASFA), BIOSIS, Biotechnology Research Abstracts, CAB Abstracts, Chimica, Compendex, EMBASE, Food Science & Technology Abstracts, INSPEC, Veterinary Science Database
  • Sayfa Sayıları: ss.1-37
  • Marmara Üniversitesi Adresli: Evet

Özet

Nanotechnology applications have significant beneficial impacts on society however, the

possible adverse effects of nanoparticles (NPs) lead to great concern from the environmental

perspective because of their overproduction, overconsumption, and unintentional release to

the wastewater. The main goal of the study was to investigate the long-term effects of

titanium dioxide (TiO2) NPs on the Anammox process, considering the accumulation of NPs

on biological systems over time, in terms of nitrogen treatment capacity, extracellular

polymeric substances content, and microbial dynamics. Anammox population was found to be

vulnerable to the elevated TiO2 NPs concentration. Persistent deterioration on nitrogen

removal was observed at 200 mg/L NPs dose upon following 585 days of exposure. NH4+-N

and NO2--N removal efficiencies decreased from 97.65% ± 1.63 to 15.84% and 98.7% ± 1.84

to 8.69%, respectively. At the inhibition dose, total Ti content was found to be 1.9 g/L Ti and

65.24% of which was associated to the biomass. It reveals that, most of the accumulated Ti

within the bioreactor deposited on the microorganisms, which may decrease substrate

utilization. During the exposure period, relative abundance of Candidatus Brocadiaceae was

almost stable up to 200 mg/L NPs dose and at this dose, its abundance decreased by 9.75%.

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