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dc.contributor.authorPradhan, Surendra K
dc.contributor.authorMikola, Anna
dc.contributor.authorHeinonen-Tanski, Helvi
dc.contributor.authorVahala, Riku
dc.date.accessioned2019-07-17T09:10:04Z
dc.date.available2019-07-17T09:10:04Z
dc.date.issued2019
dc.identifier.urihttps://erepo.uef.fi/handle/123456789/7684
dc.description.abstractThe nitrogen (N) and phosphorus (P) contents in human urine have been recovered using struvite precipitation and N-stripping techniques. Struvite precipitation technique recovers mainly phosphorus whereas N-stripping technique only recovers nitrogen. In this study, we developed an NPharvest technique which recovered both nitrogen and phosphorus separately in the same process, enabling their use independently. The technique used Ca(OH)2 to increase the pH of urine converting ammonium into NH3 gas and simultaneously precipitating P with Ca. The NH3 gas is passed through a gas permeable hydrophobic membrane (GPHM) and reacts with H2SO4 forming ammonium sulfate. Our result showed that more than 98% (w/w) of N and P can be harvested from urine in 8 h at 30 °C. The harvested ammonium sulfate contained 19% (w/w) N, and the sediment contained 1–2% (w/w) P. The extraction of N and P from 1 m3 of urine could give a profit of 1.5 €.
dc.language.isoenglanti
dc.publisherElsevier BV
dc.relation.ispartofseriesJournal of environmental management
dc.relation.urihttp://dx.doi.org/10.1016/j.jenvman.2019.06.046
dc.rightsCC BY-NC-ND https://creativecommons.org/licenses/by-nc-nd/4.0/
dc.subjectammonium sulfate
dc.subjectgas permeable hydrophobic membrane
dc.subjectnitrogen
dc.subjectnutrients recycle
dc.subjectphosphorus
dc.subjecturine
dc.titleRecovery of nitrogen and phosphorus from human urine using membrane and precipitation process
dc.description.versionfinal draft
dc.contributor.departmentYmpäristö- ja biotieteiden laitos / Toiminta
uef.solecris.id63550144en
dc.type.publicationTieteelliset aikakauslehtiartikkelit
dc.rights.accessrights© Elsevier Ltd
dc.relation.doi10.1016/j.jenvman.2019.06.046
dc.description.reviewstatuspeerReviewed
dc.format.pagerange596-602
dc.publisher.countryBritannia
dc.relation.issn0301-4797
dc.relation.volume247
dc.rights.accesslevelopenAccess
dc.type.okmA1
uef.solecris.openaccessEi


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