The attenuation capacity of different subsoils receiving domestic wastewater effluent
Citation:
Cormac Ó Súilleabháin, 'The attenuation capacity of different subsoils receiving domestic wastewater effluent', [thesis], Trinity College (Dublin, Ireland). Department of Civil, Structural and Environmental Engineering, 2005, pp 279, pp 189Download Item:
Abstract:
With the domestic wastewater effluent of approximately 400,000 dwellings in Ireland
being discharged to groundwater annually and about 25% of all water supplies in the
country provided by groundwater a risk of contamination of groundwater resources
by domestic wastewater effluent exists. Treatment Systems for Single Houses, a
wastewater treatment manual produced by the EPA, is aimed at reducing that risk. It
recommends a rigorous site suitability assessment procedure, comprising a desk
study and on-site assessment, to determine the potential of the subsoil for effluent
assimilation and attenuation. It is currently considered that a site with 1.2m of
unsaturated subsoil below the invert of the proposed percolation trenches with a Tvalue
falling in the range 1min/25mm and 50min/25m is suitable for the installation of
a septic tank treatment system. If less than 1.2m, but greater than 0.6m, of
unsaturated subsoil is present, some form of secondary treatment is also required
prior to discharge.
Author: Ó Súilleabháin, Cormac
Advisor:
Keogh, JoeQualification name:
Doctor of Philosophy (Ph.D.)Publisher:
Trinity College (Dublin, Ireland). Department of Civil, Structural and Environmental EngineeringNote:
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