biogas

• biogas is made by anaerobic decay of waste material
• biogas is mainly made up of methane, which can be burned as a fuel
• biogas is made in a simple fermenter called a digester or generator
• biogas generators need to kept at a constant temperature to keep the microorganisms respiring
• there are two main types of biogas generators: batch generators and continuous generators
• batch generators make biogas in small batches. they're manually loaded with waste, which is left to digest
• continuous generators make biogas all the time. waste is continuously fed in and biogas is produced at a steady rate
• generators for biogas need: an inlet for material to be put in ; an outlet for digested material to be removed through and an outlet so that the biogas can be piped to where it is needed