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We forewarn that we are in the testing phase, many problems are solved with the increasing of tests and experiments.

Resistance and maintenance

  • What debris can the devices handle? The device can theoretically handle all kinds of detritus, the blade operating system will be protected by a dome and at the moment we are studying alternative solutions able to give greater safety in operation.
  • How does it behave with large debris (ex: branches, logs)? The system deals with the contact with large debris as with boats, the single devices move, allowing the floating body to continue.
  • What happens in the event of a quick impact with a boat? The protective dome will be designed to protect the device from impacts and to absorb impact in the best possible way.
  • What kind of maintenance will it need? The system is designed to require the least possible maintenance, in case of failures or blocks these will probably be limited to the single rotating units.

Anchoring and Arrangement

  • Do the devices rotate on themselves, or lose their positions? No, the devices are anchored to the rope in a frontal position, the current keeps them naturally parallel to the watercourse and keeps them in the right position.
  • How do they keep on the axis? Depending on the initial installation, they are arranged and calibrated so as to reposition themselves on the axis even if subject to shocks or variations in the intensity of the current.
  • How do they maintain the right position and distance despite the changes in the river level and its intensity? The ropes to which they are anchored, have sufficient length to allow the devices to remain functioning in a wide range of river level variation. When the water level changes, the angle with which the ropes connect to the units will also vary.
  • How can they be anchored to the river bed? They can be anchored to a weight, to a stake or fixed previously to a single rope which is then laid on the river bed.
  • How does an installation vary depending on the size of the watercourse? In the case of large water courses, or with particular characteristics, the modular system allows more consecutive lines to be arranged, the devices can also have very different dimensions, in order to adapt to the best environment and plant requirements.
  • How far should the devices be arranged from one another? Currently we think about 70 cm from each other, but we are in the process of continuous improvement of the project.


  • Which systems can be used to give the rotary movement to the devices? The possible systems are many, the present solution includes blades that transmit the rotary movement to an external rack, other solutions can include self-propelled side blades, or up to an external power supply in case of particular needs.
  • What can the device size be? The dimensions can vary considerably, we currently imagine a product in a range from 70 cm to 1.5 meters.
  • How much can the cost of the single device be? If industrialized and mass-produced, the cost can be extremely reduced.

Collection point

  • What kind of collection point can be there? You can arrange a standard collection point that contains the waste and can then be picked up and replaced comfortably. Alternatively, a separator system can be installed which divides the waste at the moment.
  • What materials are collected? Mainly floating plastics, polystyrene, wood, leaves, etc. Can problems occur with varying water levels and device positions? During the positioning the possible variation of the current and the river level is calculated.