The waste organic portion (previously selected) is properly mixed with structuring material (wood chips) and put in a polyethylene tubular container (Ambiotunnel), by the special Ambipress bagger. Thanks to the closed and modular surface of Ambiotunnel, the stabilisation can be directly performed in a asphalt or cemented yard or directly in the properly arranged dump.

The innovative system with air recirculation at the bio-mass inlet and outlet prevents the leak of odourgenic particles, gas and vapour, which are automatically taken and conveyed to the mass being stabilised without creating environmental problems.

The polyethylene Ambiotunnel contains the biomass, the percolate and the gas created during the bio-stabilisation of the biomass in a sealable envelope.

After the first treatment stage the top of Ambiotunnel is properly opened and covered with the exclusive Adsorbeco covers, which are wound on special motor-driven equipment that winds and unwinds the cover and which is positioned on the Ambitech technological side.

Thanks to the active charcoal they contain, the Adsorbeco covers absorbs that minimum part of gas and bad odour that is not sucked by the intake tubes in the upper part of the tubular container.

The process is performed outdoor, without creating any environmental impact problems, waste dispersal by wind and uncontrolled losses of percolate.

The waste is stabilised by means of forced ventilation. A ventilator blows air through the Ambiotunnel and by means of punched tubes automatically inserted during the filling stage. Four more tubes with calibrated holes are also present in order to introduce water or percolate automatically. This ensures the proper level of humidity in the mass during the first stabilisation stage.

The Ambiotunnels have a 3.0 m diameter and their length, which may vary, is up to 50 metres. They can contain 3,000 to 5000 Kg. of material to be stabilised per linear metre. (The maximum limit of Kg. per linear metre depends on the type of material and on the humidity it contains).

The forward motion and the limited size of Ambipress ensure easy manoeuvres in any areas where Ambiotunnels are to be laid.

Once the biomass is fully ensiled, the technical data are entered in the computer: type of process (green waste & sludge, humid waste, humid sieved waste, etc.), weight of the material put in the Ambiotunnel, length of the Ambiotunnel and humidity of the material.

The Ambi control system management and control software processes the data and starts the process.

The start of the aerobic process leads to a controlled increase in the temperature in the Ambiotunnel.

Controls

The whole process is controlled by our exclusive Ambi control system software.

Temperature

3 PT100 probes positioned in every bio-tunnel detect the temperature uninterruptedly. The temperature is sent to the management and control system, which adjusts the air flow of the ventilator by means of an inverter in order to maintain the best operating conditions of the bio-stabilisation system

Humidity

A digital hygrometric probe on the air intake leaving the biomass controls the humidity.

Oxygen

A digital probe on the air intake from the biomass controls the oxygen. A software controlled modulating valve keeps its proper concentration in the mass being stabilised. The application of Cover Combi System is ideal both for the composting systems (sludge, humid waste, etc) and for the biological stabilisation of the organic fraction of the urban waste in the dump.