Browsing Civil Engineering (Scholarly Articles) by Author "Rodgers, Michael"
Now showing items 1-19 of 19
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Constructed wetlands for the treatment of highway runoff.
Keating, E.; Healy, Mark G.; Rodgers, Michael (Nova Publishers, 2008-06-01)Highway surface runoff contains pollutants such as total suspended solids (TSS), hydrocarbons, de-icing salts, and heavy metals. Treatment methods for highway runoff include storage/treatment facilities, such as constructed ... -
Cyclic loading tests on sandstone and limestone shale aggregates used in unbound forest roads
Rodgers, Michael; Hayes, G; Healy, Mark G. (Elsevier, 2009)This study examined the performance of two aggregates subjected to cyclic loading in a large-scale test rig. The two aggregates examined were: (i) a sandstone from Co. Cork, Ireland and (ii) a limestone shale from Co. ... -
Cyclic loading tests on sandstone and limestone shale aggregates used in unbound forest roads.
Rodgers, Michael; Hayes, Gregory; Healy, Mark G. (Construction and Building Materials, 2009-06-01)This study examined the performance of two aggregates subjected to cyclic loading in a large-scale test rig. The two aggregates examined were: (i) a sandstone from Co. Cork, Ireland and (ii) a limestone shale from Co. ... -
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 ... -
Different depth sand filters for laboratory treatment of synthetic wastewater with concentrations close to measured septic tank effluent
Walsh, G.; Rodgers, Michael; Healy, Mark G. (2011)The objective of this study was to apply hydraulic and chemical oxygen demand (COD) loading rates at the upper limits of the design criteria for buried sand filters to test the sand filter depth design criteria. Over a ... -
Dynamics and function of intracellular carbohydrate in activated sludge performing enhanced biological phosphorus removal
Wu, Guangxue; Rodgers, Michael (Elsevier, 2010)Recovery of biodegradable plastics from activated sludge is a promising sustainable technology. In this study, polyhydroxybutyrate (PHB) ¿ a biodegradable plastics material - was produced by activated sludge performing ... -
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, ... -
Evaluation of chemical amendments to control phosphorus losses from dairy slurry
Brennan, Raymond B.; Rodgers, Michael; Healy, Mark G. (Wiley, 2011)Land application of dairy slurry can result in incidental losses of phosphorus (P) to runoff in addition to increased loss of P from soil as a result of a buildup in soil test P (STP). An agitator test was used to identify ... -
Evaluation of chemical amendments to control phosphorus losses from dairy slurry.
Brennan, Raymond B.; Rodgers, Michael; Healy, Mark G. (Soil Use and Management, 2011-06-01)The aim of this paper is to identify chemicals with the potential to reduce P losses from agricultural grassland arising from the land application of dairy cattle slurry. It also aims to identify optimal application rates ... -
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, ... -
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 ... -
Nitrogen-limitation-induced carbon and phosphorus fluxes in anaerobic/aerobic sequencing batch reactors
Wu, Guangxue; Rodgers, Michael (Elseiver, 2010)Enhanced biological phosphorus removal (EBPR) has been applied widely in wastewater treatment plants. However, deterioration or failure of EBPR often happens because: (i) of the dominance of glycogen-accumulating organisms ... -
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 ... -
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 ... -
On-farm treatment of dairy soiled water using aerobic woodchip filters
Ruane, Eimear M.; Healy, Mark G.; Rodgers, Michael (Elsevier, 2011)Dairy soiled water (DSW) is produced on dairy farms through the washing-down of milking parlours and holding areas, and is generally applied to land. However, there is a risk of nutrient loss to surface and ground waters ... -
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 ... -
Production of polyhydroxybutyrate by activated sludge performing enhanced biological phosphorus removal
Rodgers, Michael; Wu, Guangxue (Elsevier, 2010)In this study, polyhydroxybutyrate (PHB) 'a biodegradable plastics material' was produced by activated sludge performing enhanced biological phosphorus removal (EBPR) in batch experiments under anaerobic, aerobic and ... -
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 ... -
The use of laboratory sand, soil and crushed-glass filter columns for polishing domestic-strength synthetic wastewater that has undergone secondary treatment
Healy, Mark G.; Burke, Padraic; Rodgers, Michael (Taylor & Francis, 2010)The aim of this study was to examine the performance of intermittently loaded, 150 mm-diameter stratified filter columns of 2 depths (0.65 and 0.375 m) comprising different media - sand, crushed glass and soil - in polishing ...