Organic waste (municipal and food waste) produces leachate and bad odours due to decomposition processes in anaerobic conditions, when disposed of in landfills.

For limiting environmental impact with solid waste management, it is possible to get a faster degradation in a natural process by utilizing bacteria which are able to convert waste and stabilised waste to a humus material with no further degradation (composting).This process consumes water, so it solves the problems of polluting leachate produced, too. From a process design perspective it means blowing air into waste in a fermentation phase. Airflow rate is calculated to provide the right amount of oxygen to help bacteria keeping the right temperature for optimum performance.

From a process design perspective it means blowing air into waste in a fermentation phase. Airflow rate is calculated to provide the right amount of oxygen to help bacteria keeping the right temperature for optimum performance.

Air Clean manufactures the entire aeration systems including air handling, air diffusion and process control.

After aerating the solid material, the air is full of polluting substances and has to be treated to remove such substances.

Aerated floors for biostabilisation

In order to accelerate the normal fermentation of waste organic materials it is necessary to guarantee conditions with the right amount of oxygen and the correct temperature for the biological activity. One of the techniques to effect this is a forced aeration system constructed from below ground concrete conduits with openings at ground level which are covered by perforated cages inside which air is blown and transferred into the organic material which rests on the floor through which the conduits run. The amount of air provided to the organic material to be composted is controlled by temperature and oxygen sensors, these sensors provide feedback to a PLC control system which in turn controls the fan speed.

The aeration ducts which supply the air are normally made of concrete, suitably waterproofed and protected from acid corrosion, the perforated cages can be made of different materials: plastic or stainless steel / cor-ten.

A critical element of these composting systems (aerated floors) is the risk of clogging of the conduits: for this reason, the holes drilled on the plates have a shape and diameter which minimizer is the risk of clogging and facilitates the operation of maintenance and cleaning

Biocells

The accelerated maturation of the waste (composting) can be carried out in fully contained structures (rectangular vessels constructed from reinforced concrete).

Within these vessels, the correct amount of air and the correct temperature conditions are ensured via an active aeration system (biocells).

The air blown is captured and partially recycled or sent to a treatment system for treatment and odor removal (typically scrubber followed by biofiltro).