Not only that - considering the state of most of the wastewater systems in the country it would be relatively easy (and cost effective) to combine the anaerobic digestion of elephant grass, with the anaerobic digestion of wastewater, to have a wastewater treatment system that actually saves money (instead of costing hundreds of thousands) and produces elecricity.
The intersting thing about this solution is that the slurry produced by the digester would be high in nutrients (nitrogen, phosphates etc,) and could be used in agriculture - reducing the need (and consumption) of chemical fertilisers.

Saw a programme on this recently. It seems to replace the nutrients itself as it goes along. No need for chemicals.

Considering the EU regs, I'd say turn 33.333 percent of arable land over to this crop.

ANAEROBIC DIGESTION THE RENEWABLE ENERGY SYSTEM FOR THE NEW MILLINIUM
Congrats to those supporting anaerobic digestion
i have been supporting such a system for years now even offering it to omagh district counil as a cost effective waste management scheme using it to take cardboard wood and other wastes and turn ing them into compost . Guess what however i have been ignored . however one note of caution needs to be sounded the massive plant with large storage facilities and a large fleet of tankers carrying slurry from a number off farms must be avided
These do not sanatise the liquids
These cannot use food scraps
These have the ability to spread broucallousis
These have the ability to spread tubercallousis .
when e.u. grants run out the are very expensive to run
A small moduler system which can be used to heat one home to 1000 homes and ranging in cost from £40.000 english pounds to £1million english pounds gives you the opportunity to have a system providing
electricty
heat
and a viable business sanatising all kinds of food scraps .
each waste been secluded from the other in a tank or trailer .