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Author Morales, N.; del Rio, A.V.; Vazquez-Padin, J.R.; Mendez, R.; Campos, J.L.; Mosquera-Corral, A.
Title The granular biomass properties and the acclimation period affect the partial nitritation/anammox process stability at a low temperature and ammonium concentration Type
Year 2016 Publication Process Biochemistry Abbreviated Journal Process Biochem.
Volume 51 Issue (down) 12 Pages 2134-2142
Keywords Anammox; AOB; Granules; Nitrogen; NOB; Partial nitritation
Abstract Extensive research on the anammox-based processes under mainstream conditions is currently in progress. Most studies have used a long acclimation period for the partial nitritation-anammox (PN-An) sludge at a low temperature and ammonium concentration. However, in this study, the results demonstrated that PN-An granular biomass produced under sidestream conditions (30 degrees C and 1000 mg NH4+-N/L) can operate at 15 degrees C and 50 mg NH4+-N/L without acclimation. The nitrogen removal efficiency was 70% and was stable for 60 days. The long-termoperation of the system with progressive adaptation provided important information for process optimization. Control of the dissolved oxygen (DO) concentration was crucial to maintain the balance between ammonia oxidizing bacteria (AOB) and anammox bacteria activities. A calculation of the oxygen penetration depth inside the granules is proposed to estimate an adequate DO level, which allows for the definition of the aerobic and anoxic zones that depend on the temperature, the size distribution and the granule density. However, the development of NOB was difficult to avoid with DO control alone. The selective washing-out of the floccular biomass, which contains mainly NOB, is proposed, leaving the granular fraction with the AOB and anammox bacteria in the system. (C) 2016 Published by Elsevier Ltd.
Address [Morales, Nicolas; del Rio, Angeles Val; Mendez, Ramon; Campos, Jose L.; Mosquera-Corral, Anuska] Univ Santiago de Compostela, Inst Technol, Dept Chem Engn, E-15705 Santiago De Compostela, Spain, Email: nicolas.morales@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:000390733500029 Approved
Call Number UAI @ eduardo.moreno @ Serial 685
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