Quote:
Originally Posted by Fuzz
That's what I was wondering, the source gas seems not easy to get.
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There's a lot of digesters out there, as biogas from fermentation is usually the starting point for all bio fuels. And it's even relatively "cheap" at anywhere from $2-20/MBtu, in fact it's cheaper than natural gas on some places in Europe. The issue is that the cheap stuff is only cheap because it uses easy to digest waste that the waste facilities either offer for free or pay the biogas company to pick up. There's only so much water treatment plant waste close to any digester. You can do it with cellulosic waste like corn stalks for example, but it suddenly becomes waaaay more expensive.