Now showing items 1-20 of 197

  • Modelling nutrients and chlorophyll-a dynamics in an Irish brackish waterbody 

    Hartnett, Michael; Nash, Stephen (Elsevier, 2004)
    This paper presents aspects of a research investigation into nutrient fluxes into and out of an important Irish estuary, Wexford Harbour, located in the southeast of Ireland. Details of the methodology applied, the data ...
  • Modelling nutrient and chlorophyll_a dynamics in an Irish brackish waterbody 

    Hartnett, Michael; Nash, Stephen (Elsevier, 2004-01)
    This paper presents aspects of a research investigation into nutrient fluxes into and out of an important Irish estuary, Wexford Harbour, located in the southeast of Ireland. Details of the methodology applied, the data ...
  • Surface clogging in an intermittent stratified sand filter. 

    Rodgers, M.; Mulqueen, J.; Healy, Mark G. (Soil Science Society of America Journal, 2004-06-01)
    Accumulation of biomass and deposition of suspended solids at the surface of a sand filter can lead to clogging of the filter media. A laboratory intermittent sand filter column, which included 3 sand strata, was operated ...
  • Cyclic performance of steel and composite bracing members 

    Broderick, Brian Michael; Goggins, Jamie (2005)
    This paper describes an experimental study on the response of hollow and filled steel members to monotonic and cyclic axial loading. Monotonic tests were first performed on short specimens to establish their compressive ...
  • The efficiency of a sequencing batch reactor (SBBR) in organic carbon and phosphorus removal 

    Prendergast, John; Rodgers, Michael; Healy, Mark G. (Taylor & Francis, 2005)
    A laboratory sequencing batch biofilm reactor (SBBR), operated for a period of 158 days, was used to treat domestic-strength synthetic effluent. The biofilm. reactor comprised a bulk fluid reactor, a biofilm plastic module, ...
  • Nutrient dynamics in Cork Harbour 

    Nash, Stephen; Hartnett, Michael (2005)
    Estuaries are commonly characterised by high productivity due to frequent if not continuous inputs of nutrients from domestic and industrial discharge effluents and from freshwater and marine sources. These forms of nutrient ...
  • Behaviour of tubular steel members under cyclic axial loading 

    Goggins, Jamie; Broderick, Brian Michael; Lucas, AS (2006)
    This paper examines the cyclic performance of axially-loaded tubular members used as bracing elements to provide lateral seismic resistance in steel framed structures. An experimental study into the response of members ...
  • A novel hybrid filter for the treatment of septic tank effluent 

    Rodgers, Michael; Healy, Mark G.; Prendergast, John (ASCE, 2006)
    Intermittent sand filtration is a common and effective method for treating septic tank effluent. However, if the loading rate is too high, clogging and ponding of the sand filter surface layer can occur due to the accumulation ...
  • Denitrification of a nitrate-rich wastewater using various wood-based media materials 

    Rodgers, Michael; Mulqueen, John; Healy, Mark G. (2006)
    This laboratory study examined the use of various wood materials as a carbon source in horizontal flow filters to denitrify nitrate-nitrogen (NO3-N) from a synthetic wastewater. The filter materials were: sawdust ( Pinus ...
  • Nitrification in a vertically moving biofilm system 

    Rodgers, Michael; Healy, Mark G.; Prendergast, John (Elsevier, 2006-03)
    A laboratory continuous feed biofilm reactor, comprising a bulk fluid reactor, a biofilm plastic module, a feed tank, and pneumatic devices and controls, was operated for a total period of 257 days, including seeding time, ...
  • An improved experimental test set-up to study the performance of granular columns 

    Black, J.; Sivakumar, V.; Madhav, M.R.; McCabe, Bryan A. (ASTM International, 2006-03)
    This paper describes an innovative design of a newly developed large test setup for testing the performance of footings supported on soft clay reinforced with granular columns. This advanced testing method is used to examine ...
  • Nitrification in a vertically moving biofilm system. 

    Rodgers, Michael; Healy, Mark G.; Prendergast, John (Journal of Environmental Management, 2006-06-01)
    A laboratory continuous feed biofilm reactor, comprising a bulk fluid reactor, a biofilm plastic module, a feed tank, pneumatic devices and controls, was operated for a total period of 257 days, including seeding time, to ...
  • A novel hybrid filter for the treatment of septic tank effluent. 

    Rodgers, Michael; Healy, Mark G.; Prendergast, John (ASCE Journal of Environmental Engineering, 2006-06-01)
    Intermittent sand filtration is a common and effective method for treating septic tank effluent. However, if the loading rate is too high, clogging and ponding of the sand filter surface layer can occur due to the accumulation ...
  • Erodibility of hill peat 

    Mulqueen, J.; Rodgers, M.; Marren, N.; Healy, Mark G. (Teagasc, 2006-06-30)
    The energy necessary to entrain soil in water depends on the soil strength. Once entrained, the settling velocity of the eroded soil in water is of fundamental importance to the processes of sediment transport and deposition. ...
  • Harvesting effects on biomass and nutrient retention in Phragmites australis in a free-water surface constructed wetland in western Ireland 

    Healy, Mark G.; Newell, J; Rodgers, M. (2007)
    The aim of this study was to examine the seasonal variation in biomass, total nitrogen (Tot-N) and total phosphorus (Tot-P) content of Phragmites australis in a 3-cell free-water surface (FWS) constructed wetland in western ...
  • A nested version of the combined hydrodynamic and water quality model, DIVAST 

    Nash, Stephen (2007)
    The present research deals with the development of a one-way nested version of the combined hydrodynamic and water quality model DIVAST (Depth Integrated Velocity and Solute Transport). Initial research has concentrated ...
  • Ground improvement using the vibro- stone column technique 

    McCabe, Bryan A.; McNeill, James A.; Black, Jonathan A. (Institution of Engineers in Ireland, 2007)
    The Vibro Stone Column technique is one of the most widely-used ground improvement processes in the world, although its potential for improving Irish sites has yet to be fully exploited. Historically the system has been ...
  • Treatment of dairy wastewater using constructed wetlands and intermittent sand filters 

    Healy, Mark G.; Rodgers, Michael; Mulqueen, John (Bioresource Technology, 2007-06-01)
    In Ireland, the most common method of disposal of dairy parlour washings is by land spreading. This treatment method has numerous problems, namely high labour requirements and the potential for eutrophication of surface ...
  • Performance of a stratified sand filter in removal of chemical oxygen demand, total suspended solids and ammonia nitrogen from high-strength wastewaters. 

    Rodgers, M.; Mulqueen, J.; Healy, Mark G.; Rodgers, Michael (Journal of Environmental Management, 2007-06-01)
    A 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 ...
  • Investigation of the seismic performance of braced frames through both testing and analysis 

    Broderick, Brian Michael; Goggins, Jamie (2008)
    The results of shake table tests on three concentrically-braced sub-frames are compared with a series of correlative inelastic analyses. Both transient time-history and nonlinear static (pushover) analyses are considered. ...