Biodegradation of nitrilotriacetic acid (NTA) and ferric–NTA complex by aerobic microbial granules

Nancharaiah, Y. V., Schwarzenbeck, N., Mohana, T. V. K., Narasimhan, S. V., Wilderer, P. A. and Venugopalan, V. P. (2006) Biodegradation of nitrilotriacetic acid (NTA) and ferric–NTA complex by aerobic microbial granules. Water Research, 40 8: 1539-1546. doi:10.1016/j.watres.2006.02.006


Author Nancharaiah, Y. V.
Schwarzenbeck, N.
Mohana, T. V. K.
Narasimhan, S. V.
Wilderer, P. A.
Venugopalan, V. P.
Title Biodegradation of nitrilotriacetic acid (NTA) and ferric–NTA complex by aerobic microbial granules
Journal name Water Research   Check publisher's open access policy
ISSN 0043-1354
Publication date 2006-05-01
Sub-type Article (original research)
DOI 10.1016/j.watres.2006.02.006
Volume 40
Issue 8
Start page 1539
End page 1546
Total pages 8
Place of publication Oxford
Publisher Pergamon Press
Language eng
Subject 0605 Microbiology
Abstract Development of mixed-culture microbial granules under aerobic conditions in a sequencing batch reactor (SBR), capable of completely degrading a recalcitrant metal chelating agent is reported. In laboratory-scale reactor studies, the microbial granules degraded 2 mM of free nitrilotriacetic acid (NTA) and Fe(III)–NTA completely in 14 and 40 h, respectively. Free NTA was degraded at a specific rate of 0.7 mM (g MLSS)−1 h−1, while Fe(III)–NTA was degraded at a specific rate of 0.37 mM (g MLSS)−1 h−1. Achievement of significant degradation rates of NTA and ferric–NTA in double-distilled water suggests that the microbial metabolism is not constrained by lack of essential elements. Efficient degradation of recalcitrant synthetic chelating agents by aerobic microbial granules suggests their potential application in a variety of situations where heavy metals or radionuclides are to be co-disposed with metal chelating agents.
Keyword Biodegradation
Chelating agent
Microbial granules
Nitrilotriacetic acid
Granulation
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Non-UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: Excellence in Research Australia (ERA) - Collection
ERA 2012 Admin Only
Advanced Water Management Centre Publications
 
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