[Digestion] Bio methane economy?

[Duncan Martin]

Cezar makes a good point in relation to the use of biomass crops to produce 
fuels - whatever conversion route is used.

Of course, feeding biomass crops to an AD plant CAN make economic and 
practical sense under certain regulatory regimes such as:
a) the EU's Common Agricultural Policy, in which farmers are limited as to 
how much they can produce, so have "spare" land - but that's a mad way to 
run a planet!
b) in some EU countries, this effect of the CAP is supported by high 
purchase prices for electricity, designed to encourage the development of 
renewable energy - which at least isn't mad!!

However, AD is better used to digest wastes (crop wastes, manures) or 
unsaleable crop surpluses.  Such use supports food production, rather than 
competing with it.

Duncan



----- Original Message ----- 
From: "Cezar T" <blimpyway at yahoo.com>
To: <digestion at listserv.repp.org>
Sent: Wednesday, February 27, 2008 9:51 PM
Subject: [Digestion] Bio methane economy?


> Hi everyone,
> I agree "hydrogen economy" is a losing proposal, but
> how much better is biogas? How does its economy and
> energy balances comparing with other biofuels, or
> other renewable energy resources?
>
> There is a recent trend to blame food increase prices
> or  rainforest cuts and even increased greenhouse
> gases upon the increased demand of "evil" biofuels -
> like ethanol or biodiesel. Can biogas be considered
> more food-crop friendly?
>
> thanks,
> cezar
>
>
> 
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