SCFI Group Limited

Sustainable sludge handling for the 21st Century


Courtesy of SCFI Group Limited

Purification of municipal and industrial waste waters leads to the generation of a residue-called “excess sludge”. This material when mechanically dewatered is typically 75-90% water. The balance of the dewatered sludge consists of organic compounds (solid waste, biomass) and inert materials (sand, salts, and metals).

These sludges have been to date dehydrated to reduce the aqueous fraction using thermal dryers or subjected to other treatment regimes such as composting or alkali addition to render the material acceptable for subsequent disposal.

Treated material has been typically disposed of through the practice of land spreading in agriculture, or by placement in landfill or incineration. Increasing costs and reduction in land bank availability has caused sludge generators to seek alternative disposal routes for their sludges.

Aqua Critox® offers the total solution to sludge handling.

Alum sludges generated from potable water clarification are typically dewatered and placed in landfill at increasing cost. Using Aqua Critox® it is possible to recover the coagulant for recycling.

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