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Water Treatment > Sludge Digestion

Sludge digestion utilizes bacterial action for transformation.

During the process of digestion, sludge unlocks biogas that will be recovered in the upper part of the tank to produce recoverable energy.

While digestion occurs, the temperature of the sludge must remain as stable as possible (approximately 37°C for mesophilic digestion, or 55°C for thermophilic digestion). This process is completed naturally in approximately thirty days.

A digestion tank may help to reduce the completion of this process to approximately ten days. Milton Roy Mixing offers digestion agitators without any draft tubes, helping to expedite the process.

 
 
 
The agitator in a digestion tank must perform the following functions:
 
  • Provide ideal homogenization throughout the entirety of the tank;
  • Avoid formation of crust and foam at the surface of the liquid;
  • Prevent accumulation of sand at the bottom of the tank;
  • Provide heat exchange for uniform temperature in the tank;
  • Re-suspend and homogenize the sludge after stoppage of the agitator. 

Equipment used

HELIFLOAT

The Helifloat agitator assists with the suspending and homogenizating of solid particles in basins or large tanks during water treatment.

HELIFLOAT
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TURBOXAL

The Turboxal agitator—patented jointly with Air Liquide—increases the capacity of treatment, improves sludge settling, reduces formation odors and homogenizes mixing.

TURBOXAL
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