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Author del Rio, A.V.; Campos, J.L.; Da Silva, C.; Pedrouso, A.; Mosquera-Corral, A.
Title Determination of the intrinsic kinetic parameters of ammonia-oxidizing and nitrite-oxidizing bacteria in granular and flocculent sludge Type
Year 2019 Publication Separation And Purification Technology Abbreviated Journal Sep. Purif. Technol.
Volume 213 Issue Pages 571-577
Keywords Ammonia oxidizing bacteria; Flocs; Granules; Kinetics; Monod; Nitrite oxidizing bacteria
Abstract The different oxygen affinities of ammonia-oxidizing (AOB) and nitrite-oxidizing bacteria (NOB) are often used to define the operational strategy to achieve partial nitritation (PN) required before the anammox (AMX) process. For this purpose, apparent kinetic parameters are mainly used in the case of granular sludge, which can lead to errors when defining the operational conditions to obtain only nitritation (avoiding nitratation). In the present study, a mathematical methodology is proposed to determine the intrinsic kinetic parameters of AOB and NOB in granular sludge based on data obtained by respirometric assays. Additionally, the oxygen affinity constant (K-O2) and maximum specific rate (r(max)) of flocculent and granular sludge sample, produced under mainstream and sidestream conditions were determined at various temperatures (15, 20 and 30 degrees C). The results show that for granules, the intrinsic K-O2 and r(max) values were lower and higher, respectively, than the apparent values. Furthermore, the K-O2 values for flocs and granules at all of the tested temperatures were lower for NOB than for AOB. The values obtained for the kinetic parameters indicated that it is impossible to maintain partial nitritation by only controlling the dissolved oxygen concentration.
Address [del Rio, Angeles Val; Pedrouso, Alba; Mosquera-Corral, Anuska] Univ Santiago de Compostela, Dept Chem Engn, Sch Engn, E-15705 Santiago De Compostela, Spain, Email: mangeles.val@usc.es;
Corporate Author Thesis
Publisher Elsevier Science Bv Place of Publication Editor
Language English Summary Language Original Title
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN 1383-5866 ISBN Medium
Area Expedition Conference
Notes WOS:000457657200054 Approved
Call Number UAI @ eduardo.moreno @ Serial (down) 977
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