AOW-NOT: All Serviced Organic Waste - Biogas Digesters

* Technical Challenges -
Proper utilisation of domestic organic waste requires development of biogas installations, based on
digesters, or a large scale in many urbanised areas of the country. It may be useful to develop a
standard unit (20,000 tons/annum) that can be replicated as required - there appears to be little
economy of scale beyond the size of a large digester. The feedstock considered here includes
currently unserviced households, as these come on stream expansion can be undertaken.
* Cost Challenges -
There may be as many as 100 viable projects, with significant capital investment required. Costs are
comparable to new coal-based electricity.
* Policy Challenges -
The projects are feasible, require little or no subsidy, and can be implemented incrementally both at
individual sites and across the country. Enabling policy, permitting, and regulation will be required
to ensure safe handling of waste products, and IPP contributions to the grid allowed.