Firstgrade - Compost Aeration Systems
Firstgrade have a wealth of experience in the design and manufacture of compost aeration systems, from a single fan with ductwork for an aerated static pile, to a complete in-vessel system with temperature monitoring and computer recipie control.
Aerated Static Piles
Aerated Static Piles
Aerated static pile composting eliminates the need for compost turning, and the subsequent odour problems.Air is sucked through the compost by a high pressure fan. The exhaust air is passed through a bio-filter to eliminate any remaining odours.
Air Ducting
Firstgrade provide a number of different ventilation systems. The above photograph shows above ground air ducts, which are covered in a layer of woodchips, and then Compost. The photograph below shows permanent stainless steel air ducts being placed in the ground. These are then concreted in to leave a flush surface, which can be driven over by a loading shovel.
Re-circulating Air System
The above diagram shows a re-circulating air system. Here, the chamber is sealed, and the same air is re-circulated through the compost via the fan and mixing valve. Temperature and Oxygen levels are monitored, and the air mixing valve is used to control the air conditions. External heat can also be added to increase temperature if required.
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