Back to Search Start Over

Start-up of the Anammox process in a membrane bioreactor

Authors :
Trigo, C.
Campos, J.L.
Garrido, J.M.
Méndez, R.
Source :
Journal of Biotechnology. Dec2006, Vol. 126 Issue 4, p475-487. 13p.
Publication Year :
2006

Abstract

Abstract: The start-up of an Anammox process was studied in a membrane sequencing batch reactor (MSBR) in which a submerged hollow fibre membrane module was used to retain the biomass. The reactor was seed with Anammox biomass and fed using the Van de Graaf medium. During a first operating stage, salt precipitation was observed and interfered with microbial activity and caused a decrease of the nitrogen removal rate of the reactor from 100 to only 10mgl−1 per day. Salt precipitation was avoided by diminishing adequately the Ca and P concentrations of the Van de Graaf medium during the last operating stage. This action increased quickly the activity of the system, and nitrogen removal rate reached up to 710mgl−1 per day with almost full nitrite removal. Sporadic flotation of the sludge was observed in the MSBR. The use of the membrane avoided biomass wash-out from the system. Moreover, a surprising fact was that Anammox biomass did not grow in flocs in the MSBR, but in granules. This fact showed that this kind of microorganisms have a trend to grow in aggregates. Results indicated that the use of the MSBR could be a suitable system for nitrogen removal by using the Anammox reaction. [Copyright &y& Elsevier]

Details

Language :
English
ISSN :
01681656
Volume :
126
Issue :
4
Database :
Academic Search Index
Journal :
Journal of Biotechnology
Publication Type :
Academic Journal
Accession number :
22936137
Full Text :
https://doi.org/10.1016/j.jbiotec.2006.05.008