Nitrogen removal in a combined vertical and horizontal subsurface-flow constructed wetland system

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dc.authorid0000-0002-6268-7237
dc.contributor.authorTuncsiper, B.
dc.date.accessioned2019-08-01T13:38:39Z
dc.date.available2019-08-01T13:38:39Z
dc.date.issued2009
dc.departmentNiğde ÖHÜ
dc.description.abstractThis study was conducted to (1) determine appropriate conditions for nitrogen removal by a combined constructed wetland (CW) system and (2) evaluate the effects of hydraulic loading rate (HLR), nitrogen loading rate (NLR), effluent recirculation, plant uptake, and seasonal change on the removal efficiency of nitrogen. A three-stage experimental CW system consisting of a vertical flow-gravel filtration (v-GF) bed without plants, a horizontal-subsurface flow (h-SSF) bed planted with Iris australis, and a vertical-subsurface flow (v-SSF) bed planted with Phragmites australis in series were fed with primary-treated domestic wastewaters. The beds with plants produced effluents of better quality than the v-GF bed without plants. It was observed that the average removal efficiencies increased as the HLR (from 100 to 30 L/m(2) d) decreased and the recycle ratios (to 100%) increased. The average removal efficiencies in the summer period were found higher of approximately 6% for the v-GF and h-SSF beds and 11% for v-SSF bed. Nitrogen removal by plant uptake was very low and only 3% (Iris) to 7% (Phragmites) of the N-input compared to other mechanisms such as nitrification and denitrification. The volume-base first-order nitrification and denitrification removal constants (1/d) were 0.388 and 0.785 for the h-SSF bed, and 0.412 and 0.293 for the v-SSF bed, respectively.
dc.identifier.doi10.1016/j.desal.2009.03.003
dc.identifier.endpage475
dc.identifier.issn0011-9164
dc.identifier.issue45352
dc.identifier.scopus2-s2.0-69349103268
dc.identifier.scopusqualityQ1
dc.identifier.startpage466
dc.identifier.urihttps://dx.doi.org/10.1016/j.desal.2009.03.003
dc.identifier.urihttps://hdl.handle.net/11480/5006
dc.identifier.volume247
dc.identifier.wosWOS:000270634400046
dc.identifier.wosqualityQ1
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.institutionauthorTuncsiper, B.
dc.language.isoen
dc.publisherELSEVIER SCIENCE BV
dc.relation.ispartofDESALINATION
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.subjectConstructed wetland
dc.subjectCombined constructed wetland system
dc.subjectHybrid system
dc.subjectNitrification/denitrification
dc.titleNitrogen removal in a combined vertical and horizontal subsurface-flow constructed wetland system
dc.typeArticle

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