2. ‘Someone somewhere has
found a solution’
The PACE project was started to help organisations in
one part of Africa get the benefits from the ideas and
experiences of people working in other parts. By
sharing ideas we don’t have to start from zero, we
can learn from other people’s experiences and share
our own findings with them, so everyone benefits.
The film we’re watching today has been shared with
people in 22 countries.
3. ‘GOOD’ or ‘BAD’?
Sort these FUELS from BEST to WORST. There’s no right
answer so think about why you’ve chosen that order.
Methane
Coal
The North Wind
A cowpat
A banana skin
A tree
Sunshine
A waterfall
Your legs
Uranium
GOOD
BAD
4. If you were a farmer in Tanzania,
would you install a biogas system??
BENEFITS TO MY FAMILY PROBLEMS TO OVERCOME
Activity 1
5. Used for lighting
and……………………
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How is it made:………………..
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Also known
as…
……………………………
……………(A mixture of
gases)
Benefits:
……………………………
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Biogas
Find out more…
What is it made from?
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6. What is biogas?
• A mixture of methane
and carbon dioxide
CH4
CO2 • Methane or ‘swamp gas’,
produced naturally in
swampy ponds
What is this?
7. What is it used for?
• Biogas is a fuel used as an
energy source for light, heat
or movement
?
8. Biogas is produced by the breakdown of
organic waste by bacteria without oxygen
(anaerobic digestion or fermentation).
How is it made?
Leftover food from houses,
shops, restaurants and
factories
Cow, sheep and
chicken manure Sewage
Leftover meat
and blood from
abattoirs
Leftover straw
and crops from
farming
What types of organic waste
could be turned in biogas?
9. Biogas is made by fermenting organic waste in a
biogas digester.
Digesters vary from small household
systems…
How is it made?
11. • It can also be captured from landfill
sites where organic waste has been rotting
under the ground
12. CREATE A SENTENCE USING THE
KEYWORDS TO COMPARE THE TWO
CASE STUDIES
KEYWORDS
Electricity generators at Holsworthy
Katakwa’s biogas stove
environmental
electricity
methane manure
biogas
Anaerobic
digestion
greenhouse
gases
organic waste pollution
This activity could also lead to a debate over whether scientists should make value judgements.
Tanzanian Shillings: 500,000 TZS is about £215 pounds at 2007 exchange rates (£280 pounds at the exchange rates when the film was made). For 500,000 shillings, a household could buy about 6 years worth of kerosene, based on average rate of use for lighting a household.
Molecules: Wikimedia Commons Public Domain; Methane gas from Minnesotas for Sustainability
Biogas Train image by Amanda i Linköping 2006 (WikiCommons)
Diagram: Practical Action Technical Sheet on Biogas
Landfill compactor – Wikimedia image released to the Public Domain
Give students the handout and ask them to scan the article for the keywords on the slide. When this has been done, ask students to construct a sentence comparing the Katakwa’s farm plant in Tanzania with the Holsworthy Biogas Plant in Devon using one or more keywords. Share sentences to complete the lesson. e.g. “The Katakwa’s use biogas for cooking and lighting, but the Holsworthy Biogas plant uses it to produce electricity”
