Re: DIG-L: Biogas from Wastewater Treatment Plant

[Kevin Chisholm <kchisholm@ca.inter.net>]

Dear Jeff

Silohexanes can be a problem with "landfill biogas",
but I do not know if they are a problem with municipal
waste water treatment sludge. At any rate, even if
silohexanes are a constituent from the MWWT gases, it
would be generally better for the environment if they
were put through a turbine..... when they are burned in
this manner, the silohexanes are destrowed and a silica
deposit occurs on the turbine blades.

Kindest regards,

Kevin Chisholm

> Jeff Forward wrote:
> 
> 
> Can anyone tell me what the salient differences are
> between biogas that is produced from a farm based
> digester and gas that is produced from an anaerobic
> digester located at a wastewater treatment plant?
> The plant is located in a town of about 8,000.  It
> already has an anaerobic digester and is considering
> installing a microturbine to run on biogas.  I am
> more familiar with farm based digesters, but I assume
> that a municipal wastewater treatment plant would
> produce a gas with different contaminants.  For
> example, would siloxanes be a problem at a wastewater
> plant where they are not particularly of concern for
> a farm based system?
> 
> Thanks for the help.
> 
> Jeff
> 
> Jeffrey W. Forward
> Richmond Energy Associates
> PO Box 615
> Richmond, VT  05477
> (802) 434-3770
> (802) 434-2344 FAX
> e-mail: forward@gmavt.net

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