Rapid composting of human waste in cold temperatures

One of our programmes is investigating a way of rapidly composting human faeces which can then be used as crop fertiliser. Unfortunately there are harsh winters which can affect this composting during the northern Winter (i.e. approx Nov-March). The methods that we were looking at trying can only get temperatures during this time up to 30 degrees - perfect for pathogen multiplication, but not for killing of pathogens.

Temperatures in this region can range during the year between -27 to +30 degrees.

Does anyone know of any methods that can be used in cold climates to allow composting to happen quickly but effectively?

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