I have a question about a anarobic digester construction.

While working on a current project with a homemade anarobic digester i have come to a question.
When turning on the gas valve tosupply the burner with Methane thathas been collected what type of device shoudl i use to keep the fire from traveling up the gas line making a kind of bomb?

Or should i not be concerned with this happening? Second is there a way to store the methane under pressure ?

If i install a large metal container  such as a  55 gallon drum   above  the  digester   how  can i  compress the gas ?

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aeray7 years ago
This is the cheapest, most elegant solution that I have come across: http://www.afrigadget.com/2010/07/06/poop-piki-piki-for-my-biogas-system/
lemonie7 years ago

I'll suggest that you look at "Dual Head Diaphragm Pump gas"

L
NachoMahma7 years ago
.  Yes, you do need to be concerned. For a low-pressure system, such as yours, I'd go with a sintered metal flame arrestor. But I'm no expert.
.  You can pressurize methane with the proper pump and equipment, which includes something that will stand more pressure than a 55-gallon drum, but I strongly recommend against a DIYer attempting to do so. Stick with your low-pressure system.
andy1917 (author)  NachoMahma7 years ago
thanks i had actually thought about a arrestor as a possible solution. The pump i can only imagine would be crazy expensive.
. A simple, inexpensive centrifugal pump will do the job ... as long as you don't have a seal leak.
Kiteman7 years ago
As long as the tank only contains methane, the fire will not travel back up the pipe, because the fire cannot burn without oxygen.
andy1917 (author)  Kiteman7 years ago
this makes perfect sense . Never thought of it that way.