Transcript Biogas Presentation

‘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.
‘GOOD’ or ‘BAD’?
Sort these FUELS from BEST to WORST. There’s no right
answer so think about why you’ve chosen that order.
GOOD
Methane
Your legs
A cowpat
A waterfall
The North Wind
A banana skin
Coal
Uranium
A tree
Sunshine
BAD
?
If you were a farmer in Tanzania,
would you install a biogas system?
BENEFITS TO MY FAMILY
PROBLEMS TO OVERCOME
Activity 1
Find out more…
Also known as…
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……(A mixture of gases)
What is it made from?
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Biogas
How is it made:………………..
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Used for lighting
and……………………………
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Benefits:…………
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What is biogas?
• A mixture of methane
and carbon dioxide
CH4
CO2
• Methane or ‘swamp gas’,
produced
Whatnaturally
is this? in
swampy ponds
What is it used for?
• Biogas is a fuel used as an
energy source for light, heat
or movement
?
How is it made?
Biogas is produced by the breakdown of
organic waste by bacteria without oxygen
(anaerobic digestion or fermentation).
Leftover food from houses,
shops, restaurants and
factories
Leftover straw
What
types
of
organic
waste
Cow, sheep and
and crops from
Sewage
could
be
turned
in
biogas?
chicken manure
farming
Leftover meat
and blood from
abattoirs
How is it made?
Biogas is made by fermenting organic waste in a
biogas digester.
Digesters vary from small household
systems…
….to large commercial plants of several thousand cubic metres
Holsworthy Biogas Plant, Devon
• It can also be captured from landfill
sites where organic waste has been
rotting under the ground
KEYWORDS
environmental
biogas
electricity
methane
organic waste
greenhouse
gases
Anaerobic
digestion
Electricity generators at Holsworthy
manure
pollution
CREATE A SENTENCE USING THE
KEYWORDS TO COMPARE THE TWO
CASE STUDIES
Katakwa’s biogas stove