biogas presentation.ppt - tusk

‘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.

Methane

Coal

The North Wind

A cowpat

A banana skin

A tree

Sunshine

A waterfall

Your legs

Uranium

GOOD

BAD

If you were a farmer in Tanzania, would you install a biogas system?

?

BENEFITS TO MY FAMILY PROBLEMS TO OVERCOME

Activity 1

Used for lighting and……………………………………………………………………………………………………………………………………………………………………

How is it made:……………….. …………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………

Also known as… …………………………………………(A mixture of gases)

Benefits:……………………………………………………………………………………………………..………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………………

Biogas

Find out more…

What is it made from? …………………………………………………… ……………………………………………………………………………………………………………………………………………………………………………………………………………………

What is biogas?• A mixture of methane and carbon dioxide

CH4

CO2 • Methane or ‘swamp gas’, produced naturally in swampy ponds

What is this?

What is it used for?• Biogas is a fuel used as an energy source for light, heat or movement

?

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?

Biogas is made by fermenting organic waste in a biogas digester.

Digesters vary from small household systems…

How is it made?

Holsworthy Biogas Plant, Devon

….to large commercial plants of several thousand cubic metres

• It can also be captured from landfill sites where organic waste has been rotting under the ground

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

biogasAnaerobic digestion

greenhouse gases

organic waste pollution