[Digestion] BIOTEC: Biogas from biodegradable waste

[Mueller, Christian]

Hye all,

Does anyone know of BIOTECH that are involved in the production of
biogas from MSW. As far as I heard they've alerady installed numerous
biogas plants in Kerala , South India. I' am interested in information
such as:

1) Functionality of digester: Is there a schematic description
available?
2) What' s the performance of BIOTECH digesters? Do they operate on a
regular basis? 
3) What are the investment or operation costs?
4) What are the problems in terms of operation / management?
5) What is the main feedstock material used?

Thanks for a short response.

Best regards,
Christian