Comment Log Display

Report attached.

Future GHG control efforts must recognize the implications of use
of bio-gasification systems at POTWs. The anaerobic digesters
within these systems do not function unless they generate gases -
all of which are GHGs. The digester gas mix is approximately 50 /
50 CO2 and methane.

The anaerobic digesters utilize feedstocks consisting primarily of
biosolids and food wastes. These materials are an industrial waste
byproduct of the agricultural industry. This is a fossil fuel
intensive industry. Use of biosolids to generate "bio"-methane is
often represented as having less environmental impact than methane
derived from a mineral well source. Such an assessment would not be
factual if the full carbon footprint of digester gas is accurately
plotted.