fulltext.study @t Gmail

The effects of zero-valent iron (ZVI) and ferroferric oxide (Fe3O4) on anammox activity and granulation in anaerobic continuously stirred tank reactors (CSTR)

Paper ID Volume ID Publish Year Pages File Format Full-Text
34457 45026 1978 9 PDF Available
Title
The effects of zero-valent iron (ZVI) and ferroferric oxide (Fe3O4) on anammox activity and granulation in anaerobic continuously stirred tank reactors (CSTR)
Abstract

•Study the effects of Fe and Fe3O4 on anammox activity and granulation.•Study the relation of anammox activity and ORP.•Study the formation mechanism of blank-anammox, Fe-anammox and Fe3O4 granules.•Determine the quorum sensing (QS) material of anammox bacterium.

The anammox granules with Fe and Fe3O4 as cores were successfully obtained in anaerobic continuously stirred tank reactors (CSTR) in this study. The sizes [d(0.5)] of Fe-anammox and Fe3O4-anammox granules successively arrived to 417.3 μm and 988.5 μm on the 39th and 72nd day, corresponding to the specific anammox activity (SAA) of 0.24 and 0.239 kgN kgVSS−1 d−1, respectively. The SAA of blank-anammox granule was stable (about 0.20 kgN kgVSS−1 d−1) in the whole study. The anammox granulation mechanisms of common anammox granule (blank-anammox granule) and Fe-anammox/Fe3O4-anammox granule were extracellular polymers (ECP) bonding model and ion-bonding model, respectively. Results showed that the optimal oxidation–reduction potential (ORP) of anammox bacteria was 209 mV. The reasonable concentration of Fe2+ and Fe3+ was beneficial to the granulation and activity of anammox bacteria by maintaining high ORP and gathering acylhomoserine lactones (AHLs). The quorum sensing (QS) material of anammox bacteria was identified as N-dodecanoyl homoserine lactone by LC–MS.

Keywords
Anammox granule; Iron; Ferroferric oxide; ORP; N-dodecanoyl homoserine lactone
First Page Preview
The effects of zero-valent iron (ZVI) and ferroferric oxide (Fe3O4) on anammox activity and granulation in anaerobic continuously stirred tank reactors (CSTR)
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us
Publisher
Database: Elsevier - ScienceDirect
Journal: Process Biochemistry - Volume 49, Issue 11, November 2014, Pages 1970–1978
Authors
, , , , ,
Subjects
Physical Sciences and Engineering Chemical Engineering Bioengineering
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us