Aqseptence Group

Tailings Filtration

Tailings Filtration


A silver mine in Mexico, had started up a new cyanidation plant to increase its silver bar production.

With increasing production they found the following problems;

  • Filtering the tailings coming from silver production, succeeding in recovering the highest quantity of water to use back in the process
  • The recovery of cyanides (one of the main costs of the Merrill Crowe process);
  • Environmental impact reduction, eliminating the tailing ponds.


Bilfinger Water Technologies was awarded the contract to supply filter presses to the silver mine.

A sludge dewatering plant comprising of 3 Diemme® Filtration GHT 2000 filter presses were supplied. Each press is able to dewater large amounts of dry solids reaching a very low residual cake moisture. The sludge dewatering plant is able to recover and return up a very high percentage of water, that is very important in Countries with few water resources.

In the previous year, the same mine also purchased 4 Diemme® Filtration AUTOMAT 1500 filter presses, employed in the Merril Crowe process.

Bilfinger Water Technologies srl

Bilfinger Water Technologies srl

Global Business Unit Industrial Filtration
Via Gessi 16
48022 Lugo (RA) Italy

Phone: +39 0545 20611
Fax: +39 0545 30358