Show simple item record

dc.contributor.authorMurnane, J. G.
dc.contributor.authorBrennan, R. B.
dc.contributor.authorHealy, Mark G.
dc.date.accessioned2016-08-08T13:16:25Z
dc.date.issued2016-07-31
dc.identifier.citationMurnane, J.G., Brennan, R.B., Healy, M.G., Fenton, O (2016) 'Assessment of intermittently loaded woodchip and sand filters to treat dairy soiled water'. Water Research, 103 :408-415.en_IE
dc.identifier.issn0043-1354
dc.identifier.urihttp://hdl.handle.net/10379/5927
dc.descriptionJournal articleen_IE
dc.description.abstractLand application of dairy soiled water (DSW) is expensive relative to its nutrient replacement value. The use of aerobic filters is an effective alternative method of treatment and potentially allows the final effluent to be reused on the farm. Knowledge gaps exist concerning the optimal design and operation of filters for the treatment of DSW. To address this, 18 laboratory-scale filters, with depths of either 0.6 m or 1 m, were intermittently loaded with DSW over periods of up to 220 days to evaluate the impacts of depth (0.6 m versus 1 m), organic loading rates (OLRs) (50 versus 155 g COD m-2d-1), and media type (woodchip versus sand) on organic, nutrient and suspended solids (SS) removals. The study found that media depth was important in contaminant removal in woodchip filters. Reductions of 78% chemical oxygen demand (COD), 95% SS, 85% total nitrogen (TN), 82% ammonium-nitrogen (NH4-N), 50% total phosphorus (TP), and 54% dissolved reactive phosphorus (DRP) were measured in 1 m deep woodchip filters, which was greater than the reductions in 0.6 m deep woodchip filters. Woodchip filters also performed optimally when loaded at a high OLR (155 g COD m-2 d-1), although the removal mechanism was primarily physical (i.e. straining) as opposed to biological. When operated at the same OLR and when of the same depth, the sand filters had better COD removals (96%) than woodchip (74%), but there was no significant difference between them in the removal of SS and NH4-N. However, the likelihood of clogging makes sand filters less desirable than woodchip filters. Using the optimal designs of both configurations, the filter area required per cow for a woodchip filter is more than four times less than for a sand filter. Therefore, this study found that woodchip filters are more economically and environmentally effective in the treatment of DSW than sand filters, and optimal performance may be achieved using woodchip filters with a depth of at least 1 m, operated at an OLR of 155 g COD m-2 d-1.en_IE
dc.description.sponsorshipTeagascen_IE
dc.formatapplication/pdfen_IE
dc.language.isoenen_IE
dc.publisherIWA Publishing and Elsevieren_IE
dc.relation.ispartofWater Researchen
dc.subjectPassive filtrationen_IE
dc.subjectWoodchipen_IE
dc.subjectSanden_IE
dc.subjectDairy soiled wateren_IE
dc.titleAssessment of intermittently loaded woodchip and sand filters to treat dairy soiled wateren_IE
dc.typeArticleen_IE
dc.date.updated2016-08-04T07:40:15Z
dc.identifier.doi10.1016/j.watres.2016.07.067
dc.local.publishedsourcehttp://dx.doi.org/10.1016/j.watres.2016.07.067en_IE
dc.description.peer-reviewedpeer-reviewed
dc.contributor.funder|~|
dc.description.embargo2017-01-31
dc.internal.rssid11304904
dc.local.contactMark Healy, Room Eng-1038, Civil Engineering, Col Of Engineering & Informatics, Nui Galway. 5364 Email: mark.healy@nuigalway.ie
dc.local.copyrightcheckedNo
dc.local.versionPUBLISHED
nui.item.downloads176


Files in this item

Attribution-NonCommercial-NoDerivs 3.0 Ireland
This item is available under the Attribution-NonCommercial-NoDerivs 3.0 Ireland. No item may be reproduced for commercial purposes. Please refer to the publisher's URL where this is made available, or to notes contained in the item itself. Other terms may apply.

The following license files are associated with this item:

Thumbnail

This item appears in the following Collection(s)

Show simple item record