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No need to look to Europe for this technology. Methane from livestock
operations and wastewater treatment facilities is processed and injected
into the natural gas piping network from Arizona to Iowa. The gas is cleaned
to the federal standards for Natural Gas and continuously monitored for
compliance. Hydrogen sulfide is a contaminant of concern and is remove via a
biological or chemical process.

On 9/10/07, LEVY,CHERONA L <[log in to unmask]> wrote:
>
> EU Research Project looks at feeding biogas into the main natural
> gas grid
> April 8, 2007
>
> "A key technology for injection of biogas into the natural gas
> grid is upgrading of the biogas to natural gas quality after which
> it can be compressed to transport grid pressure. Biogas consists
> of around 50 to 65% of methane, small fractions of other compounds
> and 50 to 35% of carbon dioxide, which has to be removed before
> injection."
>
> Some of the current technologies discussed in this article include
> membrane separation technology, pressure swing adsorption, and
> cryogenic separation.
>
> http://biopact.com/2007/04/eu-research-project-looks-at-feeding.html
> --
> LEVY,CHERONA L
>