[Digestion] Flares, Check Valves, Insulation Blankets

[Steven Bolgiano]

Hi Group,
I thought I'd put a group of trivia questions, in one email.

Gas Flare - In terms of a small digester, can anyone describe or point 
to plans for self-assembling a gas flare?
I assume it would be a type of pressure valve with an activation for a 
battery operated igniter, so that if the gas collection bag became too 
full it would relieve pressure by burning off excess?
And any comments or advice on flares in general, or how it might apply 
to a bladder tank style containment would be great.

Check Valves - I assume a gas check valve would go between the gas 
containment and the generator engine, also between a utility like the 
above mentioned flare, .... where else in a small digester system 
should  a check valve be located. I know with the solar water heating 
for tanks, we just completed ... in terms of a water valve, a "swing 
check valve" was required because our solar water heating is a closed 
loop with next to nothing in pressure to open a spring loaded valve.  
What are the various kinds of check valves for gas, and what is best for 
a small system?

Insulation Blankets - I know quite a few list members are from outside 
the U.S. so they may not be able to help, but I'm looking for a UV 
resistant insulation blanket, black on top and reflective on bottom to 
cover bladder tanks in winter. These tanks actually have a low profile 
"greenhouse" shell over them, so the ambient greenhouse temps can be as 
high as 65C. The blanket would need to be 5 x 9 meters.
Any suggestions for sources to buy?

Thanks!
Steven

-- 
Steven Bolgiano
Executive Director
Planet Foundation Ltd.
steven at planetfound.com
443.235.1344