title: Appropriate Fe (II) addition significantly enhances anaerobic ammonium oxidation (Anammox) activity through improving the bacterial growth rate.
abstract: The application of anaerobic ammonium oxidation (Anammox) process is often limited by the slow growth rate of Anammox bacteria. As the essential substrate element that required for culturing Anammox sludge, Fe (II) is expected to affect Anammox bacterial growth. This work systematically studied the effects of Fe (II) addition on Anammox activity based on the kinetic analysis of specific growth rate using data from batch tests with an enriched Anammox sludge at different dosing levels. Results clearly demonstrated that appropriate Fe (II) dosing (i.e., 0.09 mM) significantly enhanced the specific Anammox growth rate up to 0.172 d(-1) compared to 0.118 d(-1) at regular Fe (II) level (0.03 mM). The relationship between Fe (II) concentration and specific Anammox growth rate was found to be well described by typical substrate inhibition kinetics, which was integrated into currently well-established Anammox model to describe the enhanced Anammox growth with Fe (II) addition. The validity of the integrated Anammox model was verified using long-term experimental data from three independent Anammox reactors with different Fe (II) dosing levels. This Fe (II)-based approach could be potentially implemented to enhance the process rate for possible mainstream application of Anammox technology, in order for an energy autarchic wastewater treatment.
authors: Advanced Water Management Centre, The University of Queensland, St Lucia, Brisbane, Queensland 4072, Australia.
authors: Yiwen
authors: Y
authors: Liu
authors: Advanced Water Management Centre, The University of Queensland, St Lucia, Brisbane, Queensland 4072, Australia.
authors: Bing-Jie
authors: BJ
authors: Ni
mesh_terms: D064751:Ammonium Compounds / Q000737:chemistry*; D001421:Bacteria, Anaerobic / Q000737:chemistry / Q000187:drug effects* / Q000254:growth & development; D061249:Batch Cell Culture Techniques; D005296:Ferrous Compounds / Q000494:pharmacology*; D007700:Kinetics; D008962:Models, Theoretical; D010084:Oxidation-Reduction; D014865:Waste Disposal, Fluid
chemical_list: D064751:Ammonium Compounds; D005296:Ferrous Compounds
references: Biotechnol Bioeng. 2009 Jun 15;103(3):490-9
references: 19280667
references: J Biotechnol. 2008 Nov 25;138(3-4):96-102
references: 18775754
references: Appl Environ Microbiol. 2010 Apr;76(8):2652-6
references: 20190088
references: Water Res. 2010 Sep;44(17):5014-20
references: 20705314
references: Water Res. 2011 Jan;45(1):135-44
references: 20801478
references: Water Res. 2011 Jan;45(3):1258-66
references: 20965541
references: Bioresour Technol. 2011 Feb;102(3):2578-84
references: 21167707
references: Bioresour Technol. 2011 Mar;102(5):4290-3
references: 21232945
references: Bioresour Technol. 2012 Jun;114:102-8
references: 22459964
references: Water Res. 2012 Oct 1;46(15):4645-52
references: 22763288
references: Bioresour Technol. 2013 Aug;142:693-6
references: 23731899
references: Bioresour Technol. 2013 Aug;142:490-7
references: 23759432
references: Water Res. 2014 May 15;55:292-303
references: 24631878
references: Environ Sci Technol. 2014 Jul 15;48(14):7874-80
references: 24927034
references: Environ Sci Technol. 2014;48(15):8784-92
references: 24984033
references: Bioresour Technol. 2014 Oct;170:506-12
references: 25164343
references: Curr Microbiol. 2014 Dec;69(6):880-7
references: 25100226
references: Biotechnol Bioeng. 2015 Jan;112(1):98-103
references: 25042674
references: Curr Opin Biotechnol. 2001 Jun;12(3):283-8
references: 11404106
references: Biotechnol Bioeng. 2002 Feb 5;77(3):266-77
references: 11753935
references: Water Res. 2002 Nov;36(19):4839-49
references: 12448527
references: Nature. 2003 Apr 10;422(6932):608-11
references: 12686999
references: Water Sci Technol. 2004;49(11-12):83-90
references: 15303727
references: Nature. 1999 Jul 29;400(6743):446-9
references: 10440372
references: Biochem Soc Trans. 2005 Feb;33(Pt 1):119-23
references: 15667281
references: Water Environ Res. 2006 Jan;78(1):31-40
references: 16553164
references: Nature. 2006 Apr 6;440(7085):790-4
references: 16598256
references: Water Res. 2007 Oct;41(18):4149-63
references: 17583763
references: Water Sci Technol. 2007;56(9):59-65
references: 18025732
references: Water Sci Technol. 2008;57(3):383-8
references: 18309216
references: Nat Rev Microbiol. 2008 Apr;6(4):320-6
references: 18340342
references: J Struct Biol. 2008 Mar;161(3):401-10
references: 17604181
references: FEMS Microbiol Lett. 2008 May;282(1):32-8
references: 18355289
references: Bioresour Technol. 2008 Nov;99(17):8273-9
references: 18439820
references: Bioresour Technol. 2010 Mar;101(6):1762-8
references: 19900808