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Anaerobic Digesters and CHP

  • 24-04-2011 9:58am
    #1
    quentingargan
    Registered Users, Registered Users 2 Posts: 1,627 ✭✭✭


    Anyone have experience with AD and CHP for hospitals / district heating systems / schools? There has been some coverage that sileage may be suitable feedstock for AD.

    I'd be grateful for any pointers on viable systems for district heating and CHP that are leading edge, but not bleeding edge.


Comments

  • #2
    darragh_haven
    Closed Accounts Posts: 3,433 ✭✭✭darragh_haven


    I have been working in germany in the construction of 'wet' AD plants up until christmas. The main feed stock out there has been maize with between t 10% and 35% slurry. "Any thing that a cow will eat will go into it" is what i have been told. Grass silage, maize silage, whole crop, beet, etc. along with dung, slurry, rotten silage etc.
    About half of the 5000 farmer owned AD plants in Germany use the heat off the engine. some have used a district heating system, while a few have piped the low pressure gas (maximum 4km) to a school or hospital to the CHP engine, where the engine produces electricity for sale to the grid and the heat is used to heat the building.
    It is a huge industry in germany, and the best place at the moment to build one of these plants is on a Northern Irish farm due to the excellant price for the electricity there. It is not really viable in the Republic of Ireland yet (due to government ineptitude/short-sightedness). Unless you have a good location to sell the heat off the engine.


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