Stage 1: Reception and Equalization

• The system receives the day’s effluents (water + process chemicals) in a reception tank.

• It is then pumped to an Equalizer Tank, where it accumulates until full, the flow rate is stabilized, and the mixture is homogenized to ensure subsequent treatment is efficient.

Stage 2: Chemical Reaction and Decantation

• The heart of the process. The water enters a Dortmund-type Decanter (conical bottom), where the physicochemical treatment occurs:

  • pH Adjustment: Acids or alkalis are dosed automatically to achieve exact neutralization (pH = 7).

  • Flocculation: A polymer is injected that groups the contaminants together.

• The polymer separates the solids from the liquid: the heavy mud (sludge) decants towards the conical bottom, while the clarified water is extracted above the sludge into a buffer tank.

Stage 3: Final Filtration and Reuse

• The clarified water accumulates in the buffer tank and is pumped under pressure through a set of filters:

  • Sand Filter: Retains the remaining fine particles.

  • Activated Carbon Filter: Eliminates odors and organic chemical residues.

• At the outlet of this block, the water is in perfect condition for its reuse as gray water within the plant or for its discharge into the network, complying with all regulations.

Stage 4: Sludge Dewatering

• The sludge extracted from the bottom of the decanter is sent to a sludge buffer. From there, a double-acting diaphragm pump injects it into a Filter Press.

• This equipment compresses the mud, delivering completely dry sludge «cakes». This drastically reduces the weight and volume of the industrial waste.

• The wastewater that drains during pressing is not discarded but returns to the reception stage to be treated again.