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Start-up of the Anammox process in a membrane bioreactor
- 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]
- Subjects :
- *BIOMASS
*NITROGEN
*DENITRIFYING bacteria
*BIOREACTORS
Subjects
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