Desludging Rates and Mechanisms for Domestic Wastewater Treatment System Sludges in Ireland

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This report first summarises the findings of a literature review on international sludge accumulation rates and desludging frequencies (in addition to the main points gathered from the stakeholder advisory workshop that was held in Ireland in May 2017). Householder perception and the need to educate DWWTS owners on the correct operation and maintenance of their systems is then discussed, particularly with respect to the protection of soil treatment systems and the critical need for regular desludging. Clear evidencebased messaging was produced in the form of an Operation and Maintenance Manual, giving guidelines to householders on how to manage septic tanks and packaged treatment systems, as well as how to modify behaviours in the home in order to protect both their systems and the environment.