Overcoming challenges in mainstream Anammox applications: Utilization of nanoscale zero valent iron (nZVI)
| Autor: | Halil Kurt, Esra Erdim, Bilge Alpaslan Kocamemi, Zeynep Yücesoy Özkan |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Environmental Engineering
010504 meteorology & atmospheric sciences Iron Sequencing batch reactor Wastewater 010501 environmental sciences Waste Disposal Fluid complex mixtures 01 natural sciences chemistry.chemical_compound Bioreactors Ammonium Compounds Environmental Chemistry Ammonium Anaerobiosis Nitrite Waste Management and Disposal 0105 earth and related environmental sciences Zerovalent iron Sewage biology biology.organism_classification Pollution chemistry Anammox Environmental chemistry Sewage treatment Oxidation-Reduction Bacteria |
| Zdroj: | Science of The Total Environment. 651:3023-3033 |
| ISSN: | 0048-9697 |
| DOI: | 10.1016/j.scitotenv.2018.09.140 |
| Popis: | Although Anammox process is a proven technology for sidestream nitrogen removal, the process faces challenges for mainstream applications in sewage treatment plants (STPs). The aim of this study was to investigate the effect of zero valent iron nanoparticles (nZVI) on process performance to eliminate confronts for mainstream applications. An SBR (sequencing batch reactor) system was fed with various nZVI concentrations (0.04–5000 ppb) within 310 days of operation. Ammonium (NH4+N) and nitrite (NO2−N) removal rates showed 58% increase in daily measurements and 73% increase in instant measurements. Specific Anammox Activity (SAA) was noticeably higher on the days the system was exposed to nZVI compared to the unexposed days. EPS secretion, which enhances granulation of Anammox bacteria was favored by nZVI. Despite lower sludge retention time (SRT) values, the fraction of Anammox bacteria in total bacteria reached to 91–92% implying a boosting effect of nZVI on growth rate of Anammox bacteria. High Resolution Melting (HRM) analyses showed that four distinct clades were present in the reactor. |
| Databáze: | OpenAIRE |
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