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Browsing Urban Institute Ireland Research Collection by Title

Browsing Urban Institute Ireland Research Collection by Title

Now showing items 94-113 of 151

On the fit of statistical and k-C* models to projecting treatment performance in a constructed wetland system

Babatunde, A.O. ; Zhao, Y.Q. ; Doyle, R.J. ; Rackard, S.M. ; Kumar, J.L.G. ; Hu, Y.S. (Taylor & Francis, 2011-04)

The objective of this study was to assess the suitability of statistical and the k-C* models to projecting treatment performance of constructed wetlands by applying the models to predict the final effluent concentrations ...
On the necessity of sludge conditioning with non-organic polymer : AOP approach

Zhao, Y.Q. ; Keogh, C. ; Tony, Maha A. (DEStech Publications, 2009-07)

Organic polymers have long been used as sludge conditioners to improve its dewaterability in sludge management practice. Although polymers can bring about a great dewatering performance of the sludge, their potential health ...
On the role of gypsum (CaSO_4.2H_2O) in conditioning and dewatering of a waterworks sludge

Zhao, Y.Q. ; Allen, Stephen ; Sun, Guangzhi (Guangzhou University, 2004)

Problems concerning the management and utilization of sludge derived from water treatment processes are still not fully solved. A common approach is direct discharge to a landfill site. This study provides experimental ...
An open source vision for HAZUS

Moffatt, Stuart ; Laefer, Debra F. (American Society of Civil Engineering (ASCE), 2010-01)
Opportunities and impediments to the use of 3D laser scanning for adjacent excavations

Laefer, Debra F. ; Carr, Hamish ; Morrish, Sean ; Kalkan, Erol (American Society of Civil Engineering (ASCE), 2006-02)

Although three-dimensional laser (3DLS) scanning has been used to document and monitor individual excavation walls and structures on a limited basis, impediments remain to its use for major infrastructure projects. This ...
Optimising photoelectrocatalytic oxidation of fulvic acid using response surface methodology

Fu, J.F. ; Zhao, Y.Q. ; Wu, Qiuli (Elsevier, 2007-06-01)

In this paper, statistics-based experimental design with response surface methodology (RSM) was employed to investigate the effect of operation conditions on photoelectrocatalytic oxidation of fulvic acid (FA) using a ...
Optimising the performance of a lab-scale tidal flow reed bed system treating agricultural wastewater

Zhao, Y.Q. ; Sun, Guangzhi ; Lafferty, C. ; Allen, Stephen (IWA Publishing, 2004)

A gravel-based tidal flow reed bed system was operated with three different strategies in order to investigate its optimal performance for the treatment of high strength agricultural wastewaters. According to the three ...
Overview of measures to control pollution of water resources

Magette, W. L. (University College Dublin, 2010)
Peat slope failure in Ireland

Boylan, Noel ; Jennings, Paul ; Long, Michael (Michael M.) (Geological Society of London, 2008-02)

Recent peat failures in Ireland in the autumn of 2003 at Pollatomish, County Mayo and Derrybrien, County Galway have focused attention on such events. However, peat failures are not a recent phenomenon with possible ...
Performance evaluation and prediction for a pilot two-stage on-site constructed wetland system employing dewatered alum sludge as main substrate

Babatunde, A.O. ; Zhao, Y.Q. ; Doyle, R.J. ; Rackard, S.M. ; Kumar, J.L.G. ; Hu, Y.S. (Elsevier, 2011-05)

Dewatered alum sludge, a widely generated by-product of drinking water treatment plants using aluminium salts as coagulants was used as main substrate in a pilot on-site constructed wetland system treating agricultural ...
Performance expectations for microcrystalline waxes for the seismic protection of art objects

Crowley, Anne ; Laefer, Debra F. (Getty Publications, 2006-05)

Use of microcrystalline waxes for the protection of ceramic art objects from seismic events is an inexpensive and relatively popular technique in museum exhibition practice (Fig. 1). Unfortunately, because of the high ...
Performance expectations of early 20th century urban American building foundations

Laefer, Debra F. (American Society of Civil Engineering (ASCE), 2008-03)

Foundation reuse is a tricky business at the best of times. For structures predating the mid-20th century, the challenge is exacerbated by the presence of a variety of foundation types, techniques, and materials no longer ...
Performance of soil nails in Dublin glacial till

Menkiti, Christopher O. ; Long, Michael (Michael M.) (NRC Research Press, 2008-12)

Soil nailing is being used in many projects in glacial tills in Ireland, particularly to provide temporary support to steep slopes. Little design guidance is available for such materials and it is known that application ...
Phosphorus immobilization in Al-drinking water treatment sludge (Al-DWTS) and soil under laboratory conditions

Li, W.C. ; Zhao, Y.Q. (Taylor & Francis, 2010-10)

This study assessed the potential reuse of an aluminium coagulated drinking–water treatment sludge (Al–DWTS) as a main substrate in constructed wetland to replace soil for the treatment of P-enriched wastewater. The ...
Phosphorus removal in laboratory-scale unvegetated vertical subsurface flow constructed wetland systems using alum sludge as main substrate

Babatunde, A.O. ; Zhao, Y.Q. (IWA Publishing, 2009-07)

This research has two eventual goals: (1) To optimize performance of subsurface constructed wetlands for removal of phosphorus (P) (2) To demonstrate that dewatered alum sludge (a by-product), can be reused as a constructed ...
Photo-catalytic degradation of an oil-water emulsion using the photo-Fenton treatment process : effects and statistical optimization

Tony, Maha A. ; Purcell, Patrick J. ; Zhao, Y.Q. ; Tayeb, Aghareed M. ; El-Sherbiny, M.F. (Taylor & Francis, 2009-01)

The application of advanced oxidation processes (AOPs) to the treatment of an effluent contaminated with hydrocarbon oils was investigated. The AOPs conducted were Fe2+/H2O2 (Fenton’s reagent), Fe2+/H2O2/UV (Photo-Fenton’s ...
Physical and chemical properties of pre-regulated American cements

Rush, A.S. ; Laefer, Debra F. (Taylor and Francis, 2004-11)

The characteristics of pre-regulated American cements differ fundamentally from those manufactured afterwards, both in terms of physical and chemical properties and with regard to cement consistency. This paper presents ...
Pilot field-scale demonstration of a novel alum sludge-based constructed wetland system for enhanced wastewater treatment

Zhao, Y.Q. ; Babatunde, A.O. ; Hu, Y.S. ; Kumar, J.L.G. ; Zhao, X.H. (Elsevier, 2011-01)

In this study, beneficial reuse of the alum-contained drinking water treatment sludge is extended into developing a novel constructed wetland system (CWs) using the alum sludge as main substrate. The study reports on the ...
Predicted tunnel-induced settlement and damage to Findlaters church with respect to freefield and constructed side considerations

Murphy, J. ; Gaynor, S. ; Laefer, Debra F. (2010-02)

Dublin, Ireland is scheduled to constructing its first metro in 2010, with a pair of tunnels connecting the city center to the airport. This study presents first-order predictions of the anticipated soil settlement and ...
Predicting reinforced concrete frame response to excavation induced settlement

Laefer, Debra F. ; Ceribasi, Seyit ; Long, James H. ; Cording, Edward J. (American Society of Civil Engineering (ASCE), 2009-11)

In many tunneling and excavation projects, free-field vertical ground movements have been used to predict subsidence and empirical limits have been employed to evaluate risk. Validity of such approaches given the reality ...