WRc in partnership with the Environmental Body Waste Research and Thames Water examined manufacturing options for the reuse of water utility waste streams bound for landfill in this research.
The most promising waste streams for reuse 'blended mixes' were selected. These were Sewerage Sludge Incinerator Ash (SSIA) and Water Treatment Residue (WTR). These were combined as a 10% substitute for virgin clay in the manufacture of high quality bricks.
The potential savings in the use of natural raw materials, the compliance with brick manufacturing standards and commercial acceptability in reusing such waste streams means that the incorporation of SSIA and WTR blends in brick manufacturing is a commercially viable process.