Wastewater treatment plants produce a solid waste by-product typically known as biosolids. The amount produced is largely proportional to the volumes of wastewater being treated and levels of treatment required to meet increasingly stringent effluent discharge standards. Typically, 10-40 dry kilograms of biosolids are produced per person each year.

Biosolids management and disposal is an increasing global challenge for both urban and rural communities. Numerous technological approaches to reducing biosolids volumes typically result in final disposal to landfill or agricultural application. These challenges have resulted in rapidly increasing costs. This cost increase is commonly associated with;

  • Quantities - most biosolids are 75-80% water. Due to landfill consolidation trends, these biosolids need to be transported over longer distances.
  • Contamination - high pathogen and heavy metal concentrations require increasing levels of treatment, quality control, and reduced disposal options.
  • Environmental impacts - significant nutrient levels contribute to waterway degradation and breakdown of organic matter to greenhouse gas emissions.

The TERAX™ technology was developed to address the challenge of biosolids management to provide a cost-effective, and just as importantly, secure disposal route that is not subject to the risks currently burdening many wastewater treatment plants. Processing biosolids through a Terax hydrothermal treatment system can deliver substantial benefits through;

  • Reduced volumes by destruction of organic solids;
  • Reduced harm by controlled capture of breakdown products and sterilising biological contaminants;
Recovering value through targeted deconstruction and recovery of carbon and nitrogen compounds for energy and fertiliser applications.

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