Dr. Michael O. Agho" <moagho@cyberspace.net.ng> asked:
>Are there any attempts to purify the methane produced i.e. do you filter
>off the carbon and sulfur oxides that are also likely produced? If you
>do, could you please mention your method(s)?

This is very important consideration especially when human excreta is used as raw material for methane production. So far no attempts have been made in Nepal to purify the methane produced in view of removing carbon and sulfur oxides that are generated along with other gases.
 

Best regards,
Amrit & Upendra