Scaling-Up and Long-Term Operation of a Full-Scale Two-Stage Partial Nitritation-Anammox System Treating Landfill Leachate
dc.contributor.author
dc.date.accessioned
2021-05-31T06:55:08Z
dc.date.available
2021-05-31T06:55:08Z
dc.date.issued
2021-05-01
dc.identifier.uri
dc.description.abstract
Background: Biological treatment of leachate in landfill sites using anaerobic ammonium oxidation (anammox) is challenging because of the intrinsic characteristics of this complex wastewater. In this work, the scale-up and subsequent full-scale implementation of the PANAMMOX® technology (LEQUIA Research Group, Girona, Catalonia, Spain) are presented as a case study to achieve long-term nitrogen (N) removal from mature leachate mostly through a completely autotrophic pathway. (2) Methods: The treatment system consists of two sequencing batch reactors (SBRs) running in series to individually operate partial nitritation (PN) and anammox (A). Following biological treatment, physicochemical oxidation (i.e., Fenton-based process) was used to remove the remaining non-biodegradable organic matter. A cost analysis comparative was conducted in relation to the former technology used on-site for treating the leachate. (3) Results: The scale-up of the process from pilot- to full-scale was successfully achieved, finally reaching an average removal of 7.4 kg N/d. The composition of the leachate changed over time, but especially once the landfill site stopped receiving solid waste (this fact involved a marked increase in the strength of the leachate). The adjustment of the alkalinity-to-ammonium ratio before feeding PN-SBR helped to improve the N-removal efficiency. Values of conductivity above 25 mS/cm in A-SBR could negatively affect the performance of the anammox process, making it necessary to consider a dilution strategy according to the on-line monitoring of this parameter. The analysis of the operational costs showed that by implementing the PANAMMOX® technology (LEQUIA Research Group, Girona, Catalonia, Spain) in the landfill site, savings up to 32% were achievable. (4) Conclusions: Treatment of mature landfill leachate in such a two-stage PN-A system was demonstrated as feasible and economically appealing despite the complexity of this industrial wastewater. Accurate expert supervision of the process was a key factor to reaching good performances
dc.description.sponsorship
The scaling up of the PANAMMOX® technology for the treatment of landfill leachate was
funded by the Spanish Government through the N-OPTIMOX project [IPT-2011-1073-310000]. The Laboratory of Chemical and Environmental Engineering (LEQUIA) from the University of Girona (UdG) is member of the TECNIO network, and it was recognized as a
consolidated research group by the Government of Catalonia [2017-SGR-1552]. T.R.V.A. acknowledges the PhD grant provided by the Brazilian National Council of Technological and Scientific Development (CNPq) [Grant number 246382/2012-0]
dc.format.mimetype
application/pdf
dc.language.iso
eng
dc.publisher
MDPI (Multidisciplinary Digital Publishing Institute)
dc.relation
info:eu-repo/grantAgreement/MICINN//IPT-2011-1073-310000/ES/Primera planta de demostración de la tecnología PANAMMOX aplicada al tratamiento de lixiviados (N-OPTIMOX)/
dc.relation.isformatof
Reproducció digital del document publicat a: https://doi.org/10.3390/pr9050800
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Processes, 2021, vol. 9, núm. 5, p. 800
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Articles publicats (D-EQATA)
dc.rights
Attribution 4.0 International
dc.rights.uri
dc.subject
dc.title
Scaling-Up and Long-Term Operation of a Full-Scale Two-Stage Partial Nitritation-Anammox System Treating Landfill Leachate
dc.type
info:eu-repo/semantics/article
dc.rights.accessRights
info:eu-repo/semantics/openAccess
dc.type.version
info:eu-repo/semantics/publishedVersion
dc.identifier.doi
dc.identifier.idgrec
033410
dc.contributor.funder
dc.type.peerreviewed
peer-reviewed
dc.relation.ProjectAcronym
dc.identifier.eissn
2227-9717