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Author Morales, N.; del Rio, A.V.; Vazquez-Padin, J.R.; Gutierrez, R.; Fernandez-Gonzalez, R.; Icaram, P.; Rogalla, F.; Campos, J.L.; Mendez, R.; Mosquera-Corral, A. pdf  doi
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  Title Influence of dissolved oxygen concentration on the start-up of the anammox-based process: ELAN (R) Type Journal Article
  Year 2015 Publication Water Science And Technology Abbreviated Journal Water Sci. Technol.  
  Volume 72 Issue 4 Pages 520-527  
  Keywords anammox; autotrophic nitrogen removal; dissolved oxygen; granule; oxygen microprofiles  
  Abstract The anammox-based process ELAN (R) was started-up in two different sequencing batch reactor (SBR) pilot plant reactors treating municipal anaerobic digester supernatant. The main difference in the operation of both reactors was the dissolved oxygen (DO) concentration in the bulk liquid. SBR-1 was started at a DO value of 0.4 mg O-2/L whereas SBR-2 was started at DO values of 3.0 mg O-2/L. Despite both reactors working at a nitrogen removal rate of around 0.6 g N/(L d), in SBR-1, granules represented only a small fraction of the total biomass and reached a diameter of 1.1 mm after 7 months of operation, while in SBR-2 the biomass was mainly composed of granules with an average diameter of 3.2 mm after the same operational period. Oxygen microelectrode profiling revealed that granules from SBR-2 where only fully penetrated by oxygen with DO concentrations of 8 mg O2/L while granules from SBR-1 were already oxygen penetrated at DO concentrations of 1 mg O2/L. In this way granules from SBR-2 performed better due to the thick layer of ammonia oxidizing bacteria, which accounted for up to 20% of all the microbial populations, which protected the anammox bacteria from non-suitable liquid media conditions.  
  Address [Morales, N.; Vazquez-Padin, J. R.; Gutierrez, R.; Fernandez-Gonzalez, R.; Icaram, P.; Rogalla, F.] Guillarei WWTP, FCC Aqualia, E-36720 Tui, Spain, Email: nicolas.morales.pereira@fcc.es  
  Corporate Author Thesis  
  Publisher Iwa Publishing Place of Publication Editor  
  Language English Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 0273-1223 ISBN Medium  
  Area Expedition (up) Conference  
  Notes WOS:000359387200003 Approved no  
  Call Number UAI @ eduardo.moreno @ Serial 518  
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