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dc.contributor.authorSancho Lacalle, Irene
dc.contributor.authorLicon Bernal, Edxon Eduardo
dc.contributor.authorValderrama Ángel, César Alberto
dc.contributor.authorde Arespacochaga, Nicolas
dc.contributor.authorLopez Palau, Silvia
dc.contributor.authorCortina Pallás, José Luis
dc.contributor.otherUniversitat Politècnica de Catalunya. Departament d'Enginyeria Química
dc.date.accessioned2017-03-22T10:20:31Z
dc.date.available2019-04-16T00:30:32Z
dc.date.issued2017-04-15
dc.identifier.citationSancho, I., Licon , E., Valderrama, C., de Arespacochaga, N., Lopez-Palau, S., Cortina, J. Recovery of ammonia from domestic wastewater effluents as liquid fertilizers by integration of natural zeolites and hollow fibre membrane contactors. "Science of the total environment", 15 Abril 2017, vol. 584-585, p. 244-251.
dc.identifier.issn0048-9697
dc.identifier.urihttp://hdl.handle.net/2117/102781
dc.description.abstractThe integration of up-concentration processes to increase the efficiency of primary sedimentation, as a solution to achieve energy neutral wastewater treatment plants, requires further post-treatment due to the missing ammonium removal stage. This study evaluated the use of zeolites as a post-treatment step, an alternative to the biological removal process. A natural granular clinoptilolite zeolite was evaluated as a sorbent media to remove low levels (up to 100 mg-N/L) of ammonium from treated wastewater using batch and fixed bed columns. After being activated to the Na-form (Z-Na), the granular zeolite shown an ammonium exchange capacity of 29 ± 0.8 mg N-NH4+/g in single ammonium solutions and 23 ± 0.8 mg N-NH4+/g in treated wastewater simulating up-concentration effluent at pH = 8. The equilibrium removal data were well described by the Langmuir isotherm. The ammonium adsorption into zeolites is a very fast process when compared with polymeric materials (zeolite particle diffusion coefficient around 3 × 10- 12 m2/s). Column experiments with solutions containing 100 mg N-NH4+/L provide effective sorption and elution rates with concentration factors between 20 and 30 in consecutive operation cycles. The loaded zeolite was regenerated using 2 g NaOH/L solution and the rich ammonium/ammonia concentrates 2–3 g/L in NaOH were used in a liquid-liquid membrane contactor system in a closed-loop configuration with nitric and phosphoric acid as stripping solutions. The ammonia recovery ratio exceeded 98%. Ammonia nitrate and di-ammonium phosphate concentrated solutions reached up to 2–5% wt. of N.
dc.format.extent8 p.
dc.language.isoeng
dc.rightsAttribution-NonCommercial-NoDerivs 3.0 Spain
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/3.0/es/
dc.subjectÀrees temàtiques de la UPC::Enginyeria química
dc.subject.lcshSewage
dc.subject.lcshMembranes (Technology)
dc.subject.lcshZeolites
dc.subject.otherAmmonia valorization
dc.subject.otherIon-exchange
dc.subject.otherNatural clinoptilolite
dc.subject.otherLiquid-liquid membrane contactor
dc.subject.otherNitric acid
dc.subject.otherPhosphoric acid
dc.subject.otherLiquid fertilizers
dc.titleRecovery of ammonia from domestic wastewater effluents as liquid fertilizers by integration of natural zeolites and hollow fibre membrane contactors
dc.typeArticle
dc.subject.lemacAigües residuals -- Depuració
dc.subject.lemacMembranes (Tecnologia)
dc.subject.lemacZeolites
dc.contributor.groupUniversitat Politècnica de Catalunya. SETRI - Grup de Tècniques de Separació i Tractament de Residus Industrials
dc.identifier.doi10.1016/j.scitotenv.2017.01.123
dc.description.peerreviewedPeer Reviewed
dc.relation.publisherversionhttp://www.sciencedirect.com/science/article/pii/S004896971730133X
dc.rights.accessOpen Access
local.identifier.drac19740561
dc.description.versionPostprint (author's final draft)
local.citation.authorSancho, I.; Licon, E.; Valderrama, C.; de Arespacochaga, N.; Lopez-Palau, S.; Cortina, J.
local.citation.publicationNameScience of the total environment
local.citation.volume584-585
local.citation.startingPage244
local.citation.endingPage251


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