Nitrification-Denitrification in a Coupled High Rate - Water Hyacinth Ponds

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dc.contributor.authorMayo, Aloyce W.
dc.contributor.authorHanai, E. E.
dc.contributor.authorKibazohi, Oscar
dc.date.accessioned2016-05-23T13:05:15Z
dc.date.available2016-05-23T13:05:15Z
dc.date.issued2014
dc.descriptionFull text can be accessed at http://www.sciencedirect.com/science/article/pii/S147470651400059Xen_US
dc.description.abstractNitrogen transformation was studied in a coupled high rate and water hyacinth (Eichhornia crassipes) ponds at the University of Dar es Salaam. Samples of wastewater were collected and examined for water quality parameters which were used as input parameters in a mathematical model. A conceptual model was then developed to model various processes in the system using STELLA 6.0.1 software. The studGupta and Sujathay demonstrated the dominant nitrogen transformation process in high rate pond (HRP) was nitrification, but denitrification dominated in water hyacinth pond (WHP). In a HRP denitrification and volatilization accounted for 69.1% and 23.8% of removed nitrogen, respectively. On the other hand, denitrification and net sedimentation were the major nitrogen removal mechanisms in WHP accounting for 81.9% and 13.1% of removed nitrogen, respectively. Model results indicated that 1.22 g N/m2 day and 0.37 g N/m2 day of nitrogen was removed in presence and absence of biofilm, respectively. The decrease in nitrogen removal in absence of biofilm, demonstrates the importance of biofilm attached onto plants. It was concluded that incorporation of HRP improved denitrification in WHP because it enhanced formation of more nitrates in HRP in order to promote denitrification in wetland unit due to anoxic conditions.en_US
dc.identifier.citationMayo, A.W., Hanai, E.E. and Kibazohi, O., 2014. Nitrification–denitrification in a coupled high rate–Water hyacinth ponds. Physics and Chemistry of the Earth, Parts A/B/C, 72, pp.88-95.en_US
dc.identifier.doi10.1016/j.pce.2014.09.013
dc.identifier.urihttp://hdl.handle.net/20.500.11810/2211
dc.language.isoenen_US
dc.publisherElsevieren_US
dc.subjectDenitrificationen_US
dc.subjectHigh rate ponden_US
dc.subjectNitrificationen_US
dc.subjectNitrogen removalen_US
dc.subjectWater hyacinth ponden_US
dc.titleNitrification-Denitrification in a Coupled High Rate - Water Hyacinth Pondsen_US
dc.typeJournal Articleen_US
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