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Author Pedrouso, A.; Tocco, G.; val del Rio, A.; Carucci, A.; Morales, N.; Campos, J.L.; Milia, S.; Mosquera-Corral, A.
Title Digested blackwater treatment in a partial nitritation-anammox reactor under repeated starvation and reactivation periods Type
Year 2020 Publication Journal Of Cleaner Production Abbreviated Journal J. Clean Prod.
Volume 244 Issue Pages 9 pp
Keywords Anammox; Blackwater; Decentralized systems; Nitritation; Starvation; Wastewater source separation
Abstract Wastewater source-separation and on-site treatment systems face severe problems in wastewater availability. Therefore, the effect of repeated short-term starvation and reactivation periods on a partial nitritation-anammox (PN/AMX) based processes were assessed treating digested blackwater at room temperature. Two sequencing batch reactors (SBR) were operated, one of them during 24 h/day the whole week (SBR-C, which served as control) and the other with repeated starvation/reactivation periods during the nights and the weekends (SBR-D), using simulated blackwater (300 mg N/L and 200 mg COD/L) as substrate. Results showed no remarkable differences in overall processes performance between both reactors, achieving total nitrogen removal efficiencies (NRE) around 90%. Furthermore, no significant variations were measured in specific activities, except for the aerobic heterotrophic one that was lower in SBR-D, presumably due to the exposure to anoxic conditions. Then, the technical feasibility of applying the PN/AMX system to treat real blackwater produced in an office building during working hours was successfully proved in a third reactor (SBR-R), with the same starvation/reactivation periods tested in SBR-D. Despite the low temperature, ranging from 14 to 21 degrees C, total NRE up to 95% and total nitrogen concentration in the effluent lower than 10 mg N/L were achieved. Moreover, the PN/AMX process performance was immediately recovered after a long starvation period of 15 days (simulating holidays). Results proved for the first time the feasibility and long-term stability (100 days) of applying the PN/AMX processes for the treatment (and potential reuse) of blackwater in a decentralized system where wastewater is not always available. (C) 2019 Elsevier Ltd. All rights reserved.
Address [Pedrouso, Alba; Val del Rio, Angeles; Mosquera-Corral, Anuska] Univ Santiago de Compostela, Dept Chem Engn, CRETUS Inst, E-15705 Santiago De Compostela, Spain, Email: alba.pedrouso@usc.es;
Corporate Author Thesis
Publisher Elsevier Sci Ltd Place of Publication Editor
Language English Summary Language (down) Original Title
Series Editor Series Title Abbreviated Series Title
Series Volume Series Issue Edition
ISSN 0959-6526 ISBN Medium
Area Expedition Conference
Notes WOS:000503172600066 Approved
Call Number UAI @ eduardo.moreno @ Serial 1079
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