How biogas works

From the Video: 1. Most biodegradable organic material can be collected for anaerobic digestion. 2. The material is fed into a digester tank where bacteria break it down in the absence of oxygen. 3. This produces biogas (methane), which is cleaned, compressed, and sent to a CHP plant. 4. It also produces a digestate, which can be used for compost or as a fertilizer.

Biogas Plant: A Virtual Tour

The embed option was removed for this video, but it is an interesting virtual tour of a biogas plant. It's done very well, but there's one part where they simulate you getting blasted in the face with a bunch of liquid manure. Gross. Still, I recommend the video. Check it out!

http://www.youtube.com/watch?v=3UafRz3QeO8&feature=rec-HM-r2