Bell Decanter (DC)
As with the digester, the decantation of solid particles in the bottom occurs. The lighter particles, such as fats and oils, ascend to the top forming a floating layer. Both the solid matter of the bottom and the floating ones undergo a fermentation process that transforms them into simpler products, soluble in water, reducing the amount of mud.
A bell located inside the reactor divides the reactor into a zone of decantation (upper) and digestion zone (lower), allowing the passage to the digestion zone of the particles that settle and preventing the introduction of digestion gases into The settling zone.
At least once a year the bottom sludge and the decanter-digester fats should be removed.