The September issue of Waste magazine describes how Gerotto managed to safely carry out the potentially dangerous cleaning activities in a water purifier near Venice.


The use of Mini Robot Excavators combined with the Gerotto’s capable operators succeeded in a potentially dangerous situation during the cleaning of a water purifier.

The Livenza Tagliamento Acque Spa plant purifies water through water oxidation. This process consists in insufflating air in order to activate bacteria which, in turn, have the aim to remove the polluted water.

The problem in this plant rose when the oxidation process started to work ineffectively due to the stagnation of polluted sediments. In particular, a 13x9 meters tank presented 200 cubic meters of sediments per 150-180 cm of thickness.

Gerotto’s Team removed these seven years old sediments in just six days through five main steps:

  1. The first part of the aspiration activities aimed to create a minimum space inside the tank for the robots’ entrance. At the same time, the working area was secured in order to permit operators to safely rescue robots in case of emergency.
  2. Once the vacuum had created a minimum space, the Mini Dozer, the Dozer and the Mini Excavator were lowered inside the tank for the cleaning activities. In the meanwhile, three operators took care of the mini robots’ remote control and of the sediments draining activities.
  3. When the cleaning process reached the tank pipe, the tube was removed.
  4. After the pipe extraction, the tank cleaning operation increasingly accelerated.
  5. Finally, once the sediments had been removed thanks to the use of mini robots, operators started the direct intervention inside the tank in order to complete the tank cleaning.

Thanks to the use of Mini Dozer and the Mini excavator, it was possible for Gerotto’s Team to minimize the operators’ direct intervention in a potentially dangerous environment for humans.