There are four factors that will ensure the good functioning of the system:
a) #sufficient air (oxygen), provided by active aeration (pumped air) or passive aeration; b) #proper moisture (ideally moisture content should be between 45–70%); c) #internal (heap) temperature of 40–50°C (can be controlled with proper chamber dimensioning); and d) #a 25:1 carbon to nitrogen ratio (theoretically) which can be adjusted by adding an external source of carbon such as toilet paper, wood chips, and/or vegetable scraps.
It is appropriate to assume a design value of 300L/person/ year to calculate the required chamber volume.
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