Effect of external organic matter on nutrient removal and growth of Phragmites australis in a laboratory scale

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dc.contributor.authorKarunarathna, A.K.
dc.contributor.authorJinadasa, K.B.S.N.
dc.contributor.authorTanaka, N.
dc.date.accessioned2014-04-26T10:35:01Z
dc.date.available2014-04-26T10:35:01Z
dc.date.issued2006
dc.description.abstractCoconut dust, which is used intensively in horticultural applications, was tested as an external organic additive in a series of laboratory-scale subsurface-flow constructed wetlands planted with Phragmites australis. The systems were fed with a mixture of NO2 3 -N; NHþ 4 -N, and SRP in tap water to simulate high nutrient loads. In the absence of plants, TN removal efficiency was 66%, and the efficiency increased to .80% in the microcosm wetlands. TN and NO2 3 removal efficiencies were marginally increased by coconut-dust treatment in comparison with sand-bed microcosms. Analysis by ANOVA showed that the TN removal from a coconut dust-supplemented sand-bed microcosm was significantly different from a sand-bed microcosm (0.0437 , p , 0.05). All the systems showed an equal capacity to treat NHþ 4 nitrogen under low influent concentration levels. Phosphorus removal efficiencies were .98% in all three systems, and a difference between planted and unplanted systems was not observed. Shoot height and shoot densities of P. australis grown in the coconut dust-supplemented medium were significantly higher than those grown in the sand-bed medium. The difference in P. australis growth in response to the coconut dust addition revealed that the added material has the potential to create favourable conditions for plant growth.en_US
dc.identifier.citationWater Science & Technology Vol 55 No 1–2 pp 121–128 2006en_US
dc.identifier.urihttp://hdl.handle.net/123456789/651
dc.language.isoenen_US
dc.publisherQ IWA Publishingen_US
dc.subjectANOVA modelen_US
dc.subjectcoconut dusten_US
dc.subjectdenitrificationen_US
dc.subjectorganic carbonen_US
dc.subjectphosphorus sorptionen_US
dc.titleEffect of external organic matter on nutrient removal and growth of Phragmites australis in a laboratory scaleen_US
dc.typeArticleen_US

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