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Reddit mentions of The Biogas Handbook
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Reddit mentions: 1
We found 1 Reddit mentions of The Biogas Handbook. Here are the top ones.
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- CONVENIENT: Separate lids and containers allow you to individually store and transport meals or conveniently carry them all in one self-container lunch box
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| Weight | 1.82 Pounds |
You'd need to scrub the gas. When it first comes out of the generator, it will likely be full of extra CO2, a lot of water vapor, some H2S, and a few other minor byproducts that the bacterial colony makes. These gases make up about 50% of the raw biogas. While you can use raw biogas for cooking (might be sooty, smelly, and not as hot of a flame), running an engine off raw biogas will likely not work for very long. H2S alongside water vapor and metal will condense sulfur all over the inside of your engine. Luckily, scrubbing gas isn't too hard.
There are many biogas scrubbing options out there, but the one I liked the best was using a packed water column. Essentially, you feed the raw biogas through a fitting into the bottom of a tall pipe (6" pvc or something similar) several feet long, before it exits through another fitting at the top of the pipe. The inside of that pipe is packed with irregularly shaped objects with a lot of surface area, preferably made of plastic or some other non metal. Water is constantly flowing from another fitting at the top of the pipe. It covers the irregularly shaped objects as it travels to the bottom, where it flows through another fitting and into a garden bed for irrigation.
The reason this works is that CO2 and H2S (Hydrogen Sulfide gas will kill you, so it's a good idea to scrub it out) dissolve into water WAY more easily than methane...Like orders of magnitude easier. So, when your raw biogas has a huge surface area of water all around it, those two unwanted gasses are selectively dissolved into that water, leaving you with a much higher proportion of methane. I have read that a packed water column can increase methane percent to nearly 95%.
Doing a biogas setup sounds like a lot of fun, but it really is a bit larger of an undertaking if you intend on using the gas for anything except occasional cooking. I have done a lot of studying on the topic. The single most helpful resource was a book called "The Biogas Handbook" by David House. It can be found fairly cheap, or do as I did and check it out from a nearby library (Had to do interlibrary loan to find a copy, but it was still free).