Small scale, distributed anaerobic digestion plants could offer an environmentally and economically stable solution for locally produced biogas.
In Germany government incentives have led to the development of over 6000 anaerobic digestion (AD) facilities, generating twice as much power as all of the country's waste to energy facilities combined.
However many of these are large scale, 1 MW plus facilities, and the proliferation of such plants has affected both tipping fees for food waste - which have fallen from between Eur 60 to 80 per tonne down to Eur 10 to 20 per tonne - and biocrop prices to such an extent as to put many at risk of becoming economically unviable.
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