Suez Equipment

Sludge Dryers

suez-logo
Suez
Wastewater Equipment

Sludge Dryers

Overview

The limits of mechanical sludge drying sometimes create the need for thermal drying by water evaporation. SUEZ has developed a number of sludge drying processes that allow the sludge to be recovered for a multitude of uses as fertilisers, co-products for composting or as fuel for incineration plants.

Sludge drying processes offered:

  • Evaporis LT (Low Temperature)
    • thermal drying in low temperature ranges
  • Evaporis LE (Low Energy)
    • mixed drying that combines a thin-film dryer and a hot air belt dryer
  • Heliantis
    • solar drying

 

Evaporis LT (Low Temperature): thermal drying in low temperature ranges

This fully automated drying process uses the principle of continuous drying by the convection of hot air in a closed tunnel. Greenhouse gas emissions are limited and olfactory nuisances are kept under control. The recovery of the low calories (heating and cooling networks, residual energy, etc.) also reduces energy consumption.

 

Evaporis LE (Low Energy): mixed drying that combines a thin-film dryer and a hot air belt dryer

This sludge drying process features the recovery of thermal energy. The sludge goes through three treatment steps:
  • indirect drying by a thin-film evaporator: the dried sludge is pre-dried to dry content levels of 40% to 50%
  • mechanical extrusion: the sludge is forced through a perforated grid to form pellets
  • direct drying by the belt dryer: the final dry content of the pellets is between 65% and 90%

 

Heliantis: solar drying

With this process, SUEZ is promoting the use of clean and renewable energy sources to dry sludge. It uses the same principle as horticultural greenhouses, completed by a ventilation system and a sludge stirrer.

 

Reach out to a sales engineer to find the best product for your application!

Media Gallery
Other Products
Anaerobic Digestion

Contact Us

Find Us

P.O. Box 397
W166 N11965 Fond du Lac Ave.
Germantown, WI 53022