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Author (up) del Rio, A.V.; Buys, B.; Campos, J.L.; Mendez, R.; Mosquera-Corral, A. pdf  doi
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  Title Optimizing upflow velocity and calcium precipitation in denitrifying granular systems Type Journal Article
  Year 2015 Publication Process Biochemistry Abbreviated Journal Process Biochem.  
  Volume 50 Issue 10 Pages 1656-1661  
  Keywords Calcium; Denitrification; Granule; Upflow velocity  
  Abstract The denitrification process was studied in two granular biomass denitrifying reactors (USB1 and USB2). In USB1 large quantities of biomass were accumulated (9.5 gVSS L-1) allowing for the treatment of high nitrogen loads (3.5 g NO3--N L-1 d(-1)). As the biomass granulation process is not immediate the effects of different upflow velocities (0.12-5.5 m h(-1)) and calcium contents (5-200 mg Ca2+ L-1) were studied in order to speed up the process. Obtained results indicate that the optimum values for these parameters, which allow for the stable operation of USB1, are of 0.19 m h(-1) and 60 mg Ca2+ L-1. Then these optimum conditions were applied to USB2 where the effects of concentrations from 335 to 1000 mg NO3--N L-1 were tested. In these conditions nitrate concentrations of 1000 mg NO3--N L-1 are required for denitrifying granular biomass formation. Summarizing denitrifying granules can be formed at low upflow velocities and in hard or extremely hard water composition conditions if sufficient high nitrogen loads are treated. (C) 2015 Elsevier Ltd. All rights reserved.  
  Address [Val del Rio, A.; Buys, B.; Campos, J. L.; Mendez, R.; Mosquera-Corral, A.] Univ Santiago de Compostela, Inst Technol, Dept Chem Engn, Santiago De Compostela 15782, Galicia, Spain, Email: mangeles.val@usc.es;  
  Corporate Author Thesis  
  Publisher Elsevier Sci Ltd Place of Publication Editor  
  Language English Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 1359-5113 ISBN Medium  
  Area Expedition Conference  
  Notes WOS:000361775400022 Approved no  
  Call Number UAI @ eduardo.moreno @ Serial 526  
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