Deflocculation of Activated Sludge by the Dissimilatory Fe(III)-Reducing Bacterium Shewanella alga BrY.

Applied and Environmental Microbiology
Frank CaccavoPer H Nielsen

Abstract

The influence of microbial Fe(III) reduction on the deflocculation of autoclaved activated sludge was investigated. Fe(III) flocculated activated sludge better than Fe(II). Decreasing concentrations of Fe(III) caused an increase in sludge bulk water turbidity, while bulk water turbidity remained relatively constant over a range of Fe(II) concentrations. Cells of the dissimilatory metal-reducing bacterium Shewanella alga BrY coupled the oxidation of H(inf2) to the reduction of Fe(III) bound in sludge flocs. Cell adhesion to the Fe(III)-sludge flocs was a prerequisite for Fe(III) reduction. The reduction of Fe(III) in sludge flocs by strain BrY caused an increase in bulk water turbidity, suggesting that the sludge was deflocculated. The results of this study support previous research suggesting that microbial Fe(III) respiration may have an impact on the floc structure and colloidal chemistry of activated sludge.

References

May 1, 1977·Applied and Environmental Microbiology·J E HobbieS Jasper
Apr 1, 1982·European Journal of Biochemistry·F IkedaK Tomita
Jul 1, 1987·Applied and Environmental Microbiology·D R Lovley, E J Phillips
Oct 1, 1992·Applied and Environmental Microbiology·F CaccavoD R Lovley

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Citations

Jan 5, 2000·Applied and Environmental Microbiology·B F VogelL Gram
Mar 24, 2006·Water Environment Research : a Research Publication of the Water Environment Federation·Chul ParkJohn T Novak
Apr 25, 2001·Applied and Environmental Microbiology·D BaggeL Gram
Dec 3, 2004·Applied and Environmental Microbiology·Stephen M HuntPhilip S Stewart
Aug 5, 2000·Applied and Environmental Microbiology·G P Yakub, K L Stadterman-Knauer
Aug 30, 2002·Applied and Environmental Microbiology·Anton A KorenevskyTerry J Beveridge
Nov 1, 2003·FEMS Microbiology Ecology·Kjeld IngvorsenCatherine Joulian
Jul 13, 2004·Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering·Anushree MalikKazuo Kakii
Sep 4, 2018·Frontiers in Microbiology·Allison E RayTimothy S Magnuson
Oct 11, 2003·Biotechnology Advances·J E BurgessT Stephenson
May 11, 2021·Frontiers in Microbiology·Jannie Munk KristensenPer Halkjaer Nielsen
Sep 24, 2004·Water Research·Britt-Marie WilénPer Halkjaer Nielsen
Mar 16, 2005·Water Research·Fernando Morgan-Sagastume, D Grant Allen
Jul 14, 2021·Environmental Science & Technology·Abeera A AnsariChul Park

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