We are moving forward with the biogas system at the Vancouver Energy Farm. The paint will be fully dry by tomorrow and we could technically start the digestion process. However, I will wait at couple of more days to let the clover and leaf feedstock undergo a little more aerobic decomposition. I picked up all the "plumbing" fittings at Vancouver Irrigation. These folks were quite helpful and allowed me to purchase the pipe-fittings at a wonderfully discounted rate--Thank You.

Potions of the pipe-fittings are intended to be a scrubbing chamber for hydrogen sulfide gas. Hydrogen sulfide smells like rotten eggs and is corrosive to the metal or brass in any system that you feed the gas to. However, the hydrogen sulfide gas can be scrubbed by corroding some other type of metal- in this case steel wool. The steel wool is placed inside an 18-inch long chamber. As gas pressure builds up in the digester the gas is forced through the steel wool on its way to the gasholder. Below are pictures that show the process of making the scrubbing system and how it is built into the digester lid.

Unrolled Steel Wool

Feeding Steel Wool Into Scrubbing Chamber

Biogas Digester with Scrubbing Chamber Extending from the Lid