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[GreenYes] Re: Landfill methane recovery data

Hi Dennis ~

I work for a county that owns a landfill and has very up-to-date technology for gas extraction and energy production, with revenues of over a million dollars a year.

When we did our food scraps recovery study, this very question came up and our study's conclusion was that the removal of food would have negligible impact on gas recovery at the landfill. (We used the EPA LandGEM model.)

On the other hand, removal of food from landfills will cut down on odors and the attraction of birds, flies and other vectors. And, for waste generators, it means that materials don't need to be set out frequently for collection (I set out material only 2-3 times a year).

Best wishes,

John Reindl, Recycling Manager
Dane County, WI

-----Original Message-----
From: GreenYes@no.address [mailto:GreenYes@no.address]On Behalf Of Dennis Sauer
Sent: Thursday, March 01, 2007 2:16 PM
To: GreenYes@no.address
Subject: [GreenYes] Landfill methane recovery data

Does anyone have recent data or studies relating to the capture rate of methane from landfills? As we expand our food scrap diversion programs we have received criticism that we are stealing fuel from a co-generation facility at our regional landfill. I realize that in dry tomb landfills, any reduction of methane from removing food scraps is negligible due to the rapid decomposition of food scraps. This has been answered by critics who state that the latest landfill and methane recovery technology does capture methane from food scraps and all of the methane generated by a landfill. I have read one study that states: despite claims of 70-75% recovery rates, the actual amount being recovered is more like 20%. Can anyone direct me to additional information to back up this data?



Dennis Sauer

Compost Specialist compostspecialist@no.address

Central Vermont Solid Waste Management District

137 Barre St, Montpelier, Vermont 05602

802-229-9383 Ext. 303

800-730-9475(Vt only)

802-229-1318 fax


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