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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. |
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Title |
Digested blackwater treatment in a partial nitritation-anammox reactor under repeated starvation and reactivation periods |
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Year |
2020 |
Publication  |
Journal Of Cleaner Production |
Abbreviated Journal |
J. Clean Prod. |
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244 |
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Pages |
9 pp |
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Keywords |
Anammox; Blackwater; Decentralized systems; Nitritation; Starvation; Wastewater source separation |
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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. |
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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; |
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Publisher |
Elsevier Sci Ltd |
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English |
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ISSN |
0959-6526 |
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Notes |
WOS:000503172600066 |
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Call Number |
UAI @ eduardo.moreno @ |
Serial |
1079 |
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