The vertical decanters are based on the principle of static decantation and the natural precipitation of suspended solid particles. During decantation occurring inside Matec decanters, the solid particles (the mud) sink down to the bottom of the structure, while the clean water overflows into the drainage system at the top and it is discharged in a dedicated tank or pit (clean water tank).
The sedimentation of the sludge at the bottom of the silo is speeded up by using a polyelectrolyte (flocculant), while the custom design and dimensions create a water column which presses over the sludge, and guarantee the required thickness of the mud.
The shape of the Matec vertical decanter, the right proportion between the cone and the upper cylinder, has been developed thanks to our experience in the filtration of waste water. The cone’s inclination degree perfects the thickening of the mud and the upper cylinder can be used also an extra stocking space.
The clarification process is essential to a wastewater treatment plant. Unlike the filtration carried out by the filter press, the clarification is a continuous process that separates water from the solid particles suspended into it.