What is eWQMS?

Emanti Management's Water Quality Management System (eWQMS) can be used to guide the tracking, reviewing and improving of water quality.

After sludge has settled via sedimentation, the sludge is withdrawn and treated. The aim of treating sludge is to:

  • Stabilize the sludge
  • Reduce odours
  • Reduce sludge volume
  • Decompose organic matter
  • Kill disease causing organisms (disinfection)

Sludge treatment processes include:

Preliminary Operations

  • Includes sludge grinding, degritting, blending, and storage necessary to provide a relatively constant, homogeneous feed to sludge-processing facilities.


  • Procedure used to increase the solids content of the sludge by removing a portion of the liquid fraction.


  • Sludge is stabilized to reduce pathogens, eliminate offensive odors and inhibit, reduce, or eliminate the potential for putrefaction.


  • Used to improve the sludge's dewatering characteristics.


  • Sludge is disinfected by means of chemical addition, composting, heat treatment, long-term storage and pasteurization.


  • Physical unit operation used to reduce the moisture content of the sludge.


  • Process that involves reducing the water content by vaporization of water to the air.


  • Composting is a cost effective and environmentally sound alternative for the stabilization and disposal of sludge.

Thermal Reduction

  • Involves the total or partial conversion of organic solids to oxidized end products.

Ultimate Disposal

  • Ultimate disposal of sludge from wastewater treatment plants can include:
    • Disposal at landfills sites
    • Accumulation at the plant via stockpiling or lagoons
    • Beneficial uses (e.g. compost manufacturing)