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Wastewater Sludge Dewatering

Our wet processing and dewatering solutions are designed to remove rag and grit, producing a a high quality sludge material.
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Grit Removal and Dewatering Solutions for High Quality Sludge

The wastewater industry is seeing an ongoing increase in the volume of solids its sewage treatment works receive, as well as a concurrent increase the amount of sludge produced, and as modern treatment process increase the potential value of sludge, it is clear that the sludge issue isn’t going anywhere.

As the world’s population continues to grow and legislation tightens, the availability of land is also becoming scarcer, so it is not always viable to build new assets or dispose of untreated sludge.  Not only that, but these are not the most sustainable options available.

CDE’s sludge dewatering solutions remove grit and rag as early as possible in the sludge treatment process, preventing excessive abrasion and wear.  CDE’s screening and dewatering equipment is also focused on reducing the weight and volume of the sludge so that disposal and transport costs are kept to a minimum.

CDE’s sludge dewatering solutions offer:

  • Fast processing rate
  • High screenings retention
  • Real time automated control

As a result, customers benefit from:

  • Reduced downtime and maintenance requirements
  • Reduced transport and disposal costs
  • Reduced waste sent to landfill
  • A high quality sludge product for use in biosolids applications and energy generation processes
  • Maximised tank capacity and improve biogas yield 
  • More sustainable operations 


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Solids Removal

Rag and grit are major problems in wastewater sludges causing blockages, wear and inefficiencies throughout the wastewater treatment works, both up and downstream. Upstream, rag and grit cause increased wear and the need for more maintenance and shut downs. When sludges are used in downstream processes such as anaerobic digestion, rag and grit cause even greater problems. These problems include but aren’t limited to reduced tank capacity, further wear on dewatering centrifuges, and a significant reduction in biogas yield as a result of lost digester volume and increased downtime when maintaining and cleaning digester vessels. 

Our sludge dewatering solutions successfully remove solids from:

  • Sewage sludges
  • Sewer cleanout residues
  • Tank cleaning residues
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