Randomized trial evaluates recovery of phosphorus and heavy metal removal in bricks made from treated sewage sludge, indicating viable reuse options.
Key Points
This research aims to assess the feasibility of using electrodialytic-treated sewage sludge in brick manufacturing for enhanced phosphorus recovery and heavy metal removal.
Utilized electrodialysis for phosphorus recovery and heavy metal mobilization from municipal sewage sludge.
Created bricks with varying sludge content (10-30%) and fired them at temperatures ranging from 1020-1040 °C.
Analyzed the physical properties of bricks including open porosity and dry density.
Zn and Cd removal rates were 60-80%, while Cu and Pb demonstrated limited mobilization.
Bricks with higher sludge content exhibited increased open porosity and decreased dry density.
Up to 10% treated sludge mixtures maintained acceptable physical properties, promoting resource recovery.