[Digestion] Your help to up-date costs of farm scale AD plants

[Luís Ferreira]

Dear List,

Has some of you probably have already noticed from the last couple of days, I'm trying to learn more about the economics of Farm scale AD Plants based on Plug-flow digesters.

Some of the information available from the AgSTAR program case studies has almost 10 years. Therefore I feel the need to find the present values of these costs to 2007!

I would be very thankfull if I could get your advice (specially comming from those who are working in this matters) about what should be the recommendale interest rate to be used in this up-date of costs, for U.S reality.

Thank you in advance for your help.

Best wishes,

Luís Ferreira