Toxic metal removal from wastewater sludge

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This project aims to efficiently remove toxic metals from wastewater sludge. Sludge management is a problem for water utilities, incurring substantial costs. Land application of wastewater sludge is a sustainable way of sludge management, but toxic metals hinder its long-term repeated application. The project’s chemical-free and energy-positive technology is based on the treatment of wastewater sludge using acidified nitrite. The outcomes will help water utilities to sustainably manage sludge and could bring large economic, environmental and social benefits to the water utilities.