New low-cost wastewater treatment system pioneered in Ireland

摘要

Alum sludge is the main residual by-product from drinking-water-treatment processes including coagulation, flocculation, clarification and filtration, followed by dewatering in plants using aluminium salt as a coagulant. It is the most widely generated water-treatment residual worldwide - and is mostly sent to landfill being perceived as a waste of little known reuse value.