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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Partial Nitritation-Anammox Granules: Short-Term Inhibitory Effects of Seven Metals on Anammox Activity

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Author(s):
del Rio, Angeles Val [1] ; da Silva, Tulio [2] ; Martins, Tiago Henrique [2] ; Foresti, Eugenio [2] ; Campos, Jose Luis [3] ; Mendez, Ramon [1] ; Mosquera-Corral, Anuska [1]
Total Authors: 7
Affiliation:
[1] Univ Santiago de Compostela, Inst Technol, Dept Chem Engn, E-15782 Santiago De Compostela - Spain
[2] Univ Sao Paulo, Sch Engn, Dept Hydraul & Sanitat, Sao Carlos, SP - Brazil
[3] Univ Adolfo Ibanez, Fac Ingn & Ciencias, Vina Del Mar - Chile
Total Affiliations: 3
Document type: Journal article
Source: WATER AIR AND SOIL POLLUTION; v. 228, n. 11 NOV 10 2017.
Web of Science Citations: 2
Abstract

The inhibitory effect of seven different metals on the specific anammox activity of granular biomass, collected from a single stage partial nitritation/anammox reactor, was evaluated. The concentration of each metal that led to a 50% inhibition concentration (IC50) was 19.3 mg Cu+2/L, 26.9 mg Cr+2/L, 45.6 mg Pb+2/L, 59.1 mg Zn+2/L, 69.2 mg Ni+2/L, 174.6 mg Cd+2/L, and 175.8 mg Mn+2/L. In experiments performed with granules mechanically disintegrated (flocculent-like sludge), the IC50 for Cd+2 corresponded to a concentration of 93.1 mg Cd+2/L. These results indicate that the granular structure might act as a physical barrier to protect anammox bacteria from toxics. Furthermore, the presence of an external layer of ammonia oxidizing bacteria seems to mitigate the inhibitory effect of the metals, as the values of IC50 obtained in this study for anammox activity were higher than those previously reported for anammox granules. Additionally, the results obtained confirmed that copper is one of the most inhibitory metals for anammox activity and revealed that chromium, scarcely studied yet, has a similar potential inhibitory effect. (AU)

FAPESP's process: 10/11218-9 - Alternative technology for landfill leachate treatment
Grantee:Tiago Henrique Martins
Support type: Scholarships in Brazil - Post-Doctorate
FAPESP's process: 13/24189-5 - Specific anammox activity inhibition by leachate
Grantee:Túlio da Silva Siqueira
Support type: Scholarships abroad - Research Internship - Scientific Initiation