Using Biogas Generators

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  • Created by: Ellie
  • Created on: 20-04-14 12:26
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  • Using Biogas Generators
    • Generators
      • Batch generators
        • Make biogas in small 'BATCHES'
        • Manually loaded with waste
          • which is then left to digest
            • the by=products are then cleared away at the end of each session
      • Continuous generators
        • Make biogas all of the time
        • Waste is continuously fed in
          • biogas is produced at a steady rate
        • mor suitted to large scale production
      • Need:
        • An inlet for waste to be put in
        • an outlet for digested material to be moved out
        • an outlet so the biogas can be piped to where it's needed
    • Designing generators
      • Cost
        • Continuous are more expensive
          • waste has to be mechanically pumped in and products have to be mechanically pumped back out.
      • Convenience
        • Batch generators need to be manually filled and cleaned
      • Efficiency
        • gas is produced efficiently at 35* if the tempreature drops production is slower
          • Some generators are insulated.
      • Position
        • the waste will smell so generators should be positioned away from houses.
        • located close to waste sources
    • Advantages
      • The CO2 released into the atmosphere is taken in by plants so it's a carbon neutral fuel.
      • No acid rain
        • No sulphur dioxide is produced
      • Burning methane as a biogas means it isn't released to the atmosphere
        • Prevents global warming
      • The raw materials used are cheap and widely available
      • Digested material can be used as fertiliser.
      • Helps women in3rd worls countries as they do't need to collect wood for fuel.
      • Prevents diseases taht are caused by waste.

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