Browsing by Author "Healy, Mark G."
Now showing items 21-40 of 152
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Contrasting yield responses to phosphorus applications on mineral and organic soils from extensively managed grasslands: Implications for P management in high ecological status catchments
González Jiménez, José L.; Healy, Mark G.; Roberts, William M.; Daly, Karen (Wiley, 2018-09-13)Phosphorus (P) loss from grassland production is one of the main causes affecting high status water bodies in Europe. Soils with a high content in organic matter (OM), even if extensively managed, are particularly vulnerable ... -
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. ... -
Cycling and transport of phosphorus and nitrogen from harvested peatland forests and possible mitigation and methods
Asam, Zaki-Ul-Zaman (2012-11-16)Drainage of peatlands has been part of forestry practice since the early 20th century. In Ireland and the UK, approximately 800,000 ha of peat catchments were drained and afforested between the 1950s and 1990s. A large ... -
Dairy processing sludge and co-products: a review of present and future re-use pathways in agriculture
Shi, W.; Healy, Mark G.; Ashekuzzaman, S.M.; Daly, K.; Leahy, J.J.; Fenton, Owen (Elsevier, 2021-06-22)The dairy industry is one of the largest global producers of wastewater and generates huge volumes of dairy processing sludge (DPS). There are two main types of DPS, lime-treated dissolved air floatation sludge and ... -
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 ... -
Developing and validating a decision support tool for media selection to mitigate drainage waters
Ezzati, Golnaz; Healy, Mark G.; Christianson, Laura E.; Feyereisen, Gary; Thornton, Steven; Daly, Karen; Fenton, Owen (Elsevier, 2019-07-26)The nitrate nitrogen (NO3-N) and ammonium (NH4-N) and/or dissolved reactive phosphorus (DRP) load in drainage water from farms can be managed by reactive or biological media filters. The nutrient content of the drainage ... -
Development of filtration technologies for effective, cost-efficient and robust water treatment
Grace, Maebh A. (2016-08-12)The provision of high quality, potable water in a sustainable and effective manner is a key challenge for water engineers, scientists, and policy makers. Urbanisation and industrial development, along with population ... -
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 ... -
The distribution, type, popularity, size and availability of river-run gravel and crushed stone for use in land drainage systems, and their suitability for mineral soils in Ireland
Byrne, I.; Healy, Mark G.; Fenton, O.; Tuohy, P. (Compuscript for Teagasc (Agriculture and Food Development Authority, Ireland), 2022-06-24)The performance of land drainage systems installed in mineral soils in Ireland is highly variable, and is dependent on, amongst other factors, the quality and suitability of the aggregate used. In Ireland, aggregate for ... -
Economic analysis of pig manure treatment options in Ireland.
Troy, Shane M.; Healy, Mark G. (2012)An economic analysis was performed on treatment options for pig manure in Ireland. Costs were based on a 500 sow integrated pig farm producing 10,500 m3 of manure per year at 4.8 % dry matter. The anaerobic digestion of ... -
Effect of chemical amendments to dairy soiled water and time between application and rainfall on phosphorus and sediment losses in runoff
Serrenho, Ana; Healy, Mark G. (2012)Dairy soiled water (DSW) is a dilute, low nutrient effluent produced on Irish dairy farms through the regular washing down of milking parlours and holding areas. In Ireland, there is no closed period for the land application ... -
Effect of chemical amendments to dairy soiled water and time between application and rainfall on phosphorus and sediment losses in runoff
Serrenho, Ana; Healy, Mark G. (Elsevier, 2012-05-18)Dairy soiled water (DSW) is a dilute, low nutrient effluent produced on Irish dairy farms through the regular washing down of milking parlours and holding areas. In Ireland, there is no closed period for the land application ... -
Effect of rainfall interval on runoff losses of biosolids and meat and bone meal when applied to a grassland soil
Lucid, Joseph D.; Healy, Mark G. (Springer, 2014)This study assessed runoff losses following laboratory rainfall simulation on a grassland soil at two time intervals (48 and 216 h) after a single application of biosolids and meat and bone meal (MBM). The treatments were: ... -
Effect of sawdust addition and composting of feedstock on renewable energy and biochar production from pyrolysis of anaerobically digested pig manure
Shane M. Troy, Tereza Nolan, James J. Leahy, Peadar G. Lawlor, Mark G. Healy, Witold Kwapinski; Nolan, Tereza; Leahy, James J.; Lawlor, Peadar G.; Healy, Mark G.; Kwapinski, Witold (2013) -
Effect of sawdust addition on composting of separated raw and anaerobically digested pig manure
Troy, Shane M.; Leahy, James J.; Healy, Mark G. (Elsevier, 2012-06)Manures need the addition of carbon-rich bulking agents to conserve N during composting, which increases the cost of the composting process. The recommended proportion of manure / sawdust, based on a carbon (C): nitrogen ... -
Effect of sawdust addition on composting of separated raw and anaerobically digested pig manure
Troy, Shane M.; Healy, Mark G. (Elsevier, 2012)Manures need the addition of carbon-rich bulking agents to conserve N during composting, which increases the cost of the composting process. The recommended proportion of manure/sawdust, based on a carbon (C):nitrogen (N) ... -
Effect of sawdust addition on composting of separated raw and anaerobically digested pig manure
Troy, Shane M.; Healy, Mark G. (Elsevier, 2012)Manures need the addition of carbon-rich bulking agents to conserve N during composting, which increases the cost of the composting process. The recommended proportion of manure / sawdust, based on a carbon (C): nitrogen ... -
Effects of fertiliser on phosphorus pools in soils with contrasting organic matter content: A fractionation and path analysis study
González Jiménez, J.L.; Healy, Mark G.; Daly, Karen (Elsevier, 2018-12-05)With the intensification of agricultural production in many European countries, more marginal soils with elevated organic matter (OM) content are being brought into cultivation. However, little is known about the transformations ... -
Effects of substrate stress and light intensity on enhanced biological phosphorus removal in a photo-activated sludge system
Mohamed, A.Y.A.; Welles, L.; Siggins, A.; Healy, Mark G.; Brdjanovic, D.; Rada-Ariza, A.M.; Lopez-Vazquez, C.M. (Elsevier, 2020-11-06)Photo-activated sludge (PAS) systems are an emerging wastewater treatment technology where microalgae provide oxygen to bacteria without the need for external aeration. There is limited knowledge on the optimal conditions ...