Diese Präsentation wurde im Rahmen des Comenius Projektes Erneuerbare Energien erstellt. Das Treffen fand am HANSE-Berufskolleg Lemgo statt.

2.  Biogas
is created when natural
waste is decomposed.
 Small bacteria create the biogas.
 This process has been done by
nature for millions of years.
This is the product which the
biogas system produces.

3.  First
the material is collected in a pit
 In the pit they mix the materials
The organic material is filled
into the pit
A mixer moves the organic
material so that the bacteria
can always work

4. 
The mixture is pumped in a bottle with
the bacteria.

The biogas, which has been produced, is
burnt in an engine to produce electricity
and heat.

5. The biogas is pumped under this
big black roof and then into the
engine

6. 
The rest is used as a fertiliser for farmers

7. Pit
Bacteria
Heat
Corn
Fertilizer
Electricity

8. Pro





No fossil fuels are used
Renewable energy
Neutral CO2-production
Can produce both heat and
electricity
Synthetic fertiliser is saved by
using the bi-product of a
biogas-plant
Cons
Cultivable land can no
longer be used to harvest
food
 Price for farmland increases
and food can become more
expensive


14. Disadvantages of wind energy

15. Disadvantages of wind energy

16. Disadvantages of wind energy

17. Disadvantages of tide plant

high cost factor
› frequent servicing
› high wear and tear by sand and salt
› prevention of possible landslides or
earthquakes

they start becoming worth after 5 -10
years
→ because of high costs, for the power
plants and including necessary for dams

18. 
nature damage

Fauna & Flora lose their habitats

fertility adjoining meadows, fields
and pastures sink, due to water stop