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dc.contributor.authorRodgers, M.
dc.contributor.authorMulqueen, J.
dc.contributor.authorHealy, Mark G.
dc.contributor.authorRodgers, Michael
dc.identifier.citationHealy, M.G., Rodgers, M., Mulqueen, J. 2007. Performance of a stratified sand filter in removal of chemical oxygen demand, total suspended solids and ammonia nitrogen from high-strength wastewaters. Journal of Environmental Management 83: 409-415.en_US
dc.description.abstractA stratified sand filter column, operated in recirculation mode and treating synthetic effluent resembling high strength dairy wastewaters was studied over a 342 day duration. The aim of this paper was to examine the organic, total suspended solids (TSS) and nutrient removal rates of the sand filter, operated in recirculation mode, under incrementally increasing hydraulic and organic loading rates and to propose a field filter sizing criterion. Best performance was obtained at a system hydraulic loading rate of 10 L m-2 d-1; a higher system hydraulic loading rate (of 13.4 L m-2 d-1) caused surface ponding. The system hydraulic loading rate of 10 L m-2 d-1 gave a filter chemical oxygen demand (COD), TSS, and TKN loading rate of 14, 3.7, and 2.1 g m-2 d-1, respectively, and produced consistent COD and TSS removals of greater than 99%, and an effluent NO3-N concentration of 42 mg L-1 (accounting for an 86% reduction in total nitrogen (Tot-N)). As the proportional surface area requirement for the sand filter described in this study is less than the recommended surface area requirement of a free-water surface (FWS) wetland treating an effluent of similar quality, it could provide an economic and sustainable alternative to conventional wetland treatment.en_US
dc.publisherJournal of Environmental Managementen_US
dc.subjectCivil Engineeringen_US
dc.subjectRecirculating sand filtersen_US
dc.subjectDairy soiled wateren_US
dc.subjectOrganic loading rateen_US
dc.subjectAgricultural wastewateren_US
dc.subject.lcshRecirculating sand filtersen_US
dc.subject.lcshAgricultural wastewateren_US
dc.subject.lcshDairy soiled water treatmenten_US
dc.titlePerformance of a stratified sand filter in removal of chemical oxygen demand, total suspended solids and ammonia nitrogen from high-strength wastewaters.en_US

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