Development of Anammox Reactor Equipped with a Degassing Membrane to Improve Biomass Retention

Water Science and Technology Volume 66 Issue 2 Page 451-456 published_at 2012-06
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Title ( eng )
Development of Anammox Reactor Equipped with a Degassing Membrane to Improve Biomass Retention
Creator
Matsunaga Kosuke
Nakahara Yoshihito
Sasakawa Manabu
Source Title
Water Science and Technology
Volume 66
Issue 2
Start Page 451
End Page 456
Abstract
In up-flow anammox reactors, one of the contributing factors of biomass wash-out is the adherence of nitrogen gas produced by anammox reaction to biomass. In this study, we operated an up-flow anammox reactor equipped with a degassing membrane to minimize the biomass wash-out from the reactor by separating the produced gas from the biomass. In addition, both the effect of degassing on the anammox reactor performance and the durability of the membrane submerged in the anammox reactor were investigated. The results show that the use of the degassing membrane in the anammox reactor could 1) Improve the biomass retention ability (by separating the produced gas from the biomass), and 2) Increase the component ratio of anammox bacteria in the reactor. In addition, degassing could reduce the N2O emission produced in the reactor (for the gas selectivity of the degassing membrane). No membrane fouling was observed even after two months of operation without washing, indicating an advantage to the use of the degassing membrane.
Keywords
Anaerobic ammonium oxidation (anammox)
degassing membrane
biomass retention
NDC
Construction. Civil engineering [ 510 ]
Language
eng
Resource Type journal article
Publisher
IWA Publishing
Date of Issued 2012-06
Rights
Copyright (c) IWA Publishing 2012
Publish Type Author’s Original
Access Rights open access
Source Identifier
[ISSN] 0273-1223
[DOI] 10.2166/wst.2012.222
[DOI] http://doi.org/10.2166/wst.2012.222 isVersionOf