Achieve 90%DS+ and Class A biosolids

Industrial
12%DS

Municipal
18%DS

Industrial sludge cake before EVD Evaporative Dryer at 12%DS
Industrial sludge cake after EVD Evaporative Dryer at 90%DS
Municipal wastewater treatment plant WWTP sludge cake after EVD Evaporative Dryer at 95%DS

Our Evaporative Dryer (EVD) dries sludge cakes from:

  • ELODE-dried sludge cake

  • Municipal water AND wastewater treatment

  • Paper, pulp mills

  • Organic chemical, pharmaceutical plants

  • Drilling fluid / mud

  • Food, fruit, vegetable processors

  • Dairy, milk processors

  • Slaughterhouses, butcheries, meat, poultry processors

  • Farms, manure, animal waste

  • Breweries, beverage producers

  • Textile, leather industry

  • Other organic waste

95%DS

90%DS

EVD vs. Other Sludge Dryers

How EVD dries sludge cake

The EVD uses warm air convection inside a closed loop heat pump dryer without heat loss:

  1. Sludge cake enters the shaping machine inlet, evenly extruding and distributing the cake "spaghetti" across the belt.

  2. Dry warm air passes over the wet cake, collecting moisture as the two belts convey the dried cake to the exit.

  3. The A/C evaporator fins capture the moisture.

  4. The dehumidified warm air is reheated by the heat pump and sent back into the drying chamber.

  5. The dried sludge cake is discharged and conveyed away from the dryer.

About the Evaporative Dryer (EVD)

EVD Evaporative Dryer 1200 model

The Evaporative Dryer (EVD) further dries cake produced by either ELODE or mechanical dewatering equipment (eg. belt press, screw press, centrifuge).

This low temperature belt dryer processes cake at 10%DS+, drying it up to 90%DS+ to achieve Class A biosolids with a low operating temperature (≤80˚C).

The EVD uses heat pumps in a closed loop, convection process to maximize heat recovery and minimize energy waste, consuming 400 kWh to remove 1 ton of water.

EVD Specifications

Note: Specifications are subject to change depending on many factors. There are thousands of types of sludge - we may modify the machine to better suit our customer’s application.