Other slides in this set

Slide 2

Preview of page 2

Here's a taster:

· Yoghurt
· Beer
· Bio-Fuels
· Fermenters
· Biogenesis…read more

Slide 3

Preview of page 3

Here's a taster:

· Milk is boiled to kill bacteria.
· Milk is cooled (30°C)
· Yoghurt making bacteria added (starter culture).
· Milk contains the sugar Lactose.
· Lactose Lactic Acid + Energy
· Lactic acid converts soluble proteins into solid
· Acidity preserves the yoghurt (reduces growth of
bacteria).…read more

Slide 4

Preview of page 4

Here's a taster:

· Barley Grains: Contains starch, to
· Malting - seeds are germinated, enzymes
in the seed digest starch Glucose.
· Fermentation: Add brewer's yeast that
turns the glucose into alcohol.
· Glucose Ethanol + Carbon Dioxide
· Hops: Flower that is added to give flavour.…read more

Slide 5

Preview of page 5

Here's a taster:

· Anaerobic bacteria which ferment organic
waste in Methane and Carbon Dioxide.
· Advantages
· Uses waste materials.
· Produces fuel fertiliser.
· Low start up cost.
· Doesn't require high technology.…read more

Slide 6

Preview of page 6

Here's a taster:

· Yeast ferments waste products from the sugar
· Glucose Ethanol + Carbon dioxide
· Ethanol is removed by distillation.
· Advantages
· Low tech.
· Cheap to set up.
· Ethanol is mixed with gasohol.
· Ethanol : Petrol
10% 90%…read more

Slide 7

Preview of page 7
Preview of page 7

Slide 8

Preview of page 8
Preview of page 8

Slide 9

Preview of page 9
Preview of page 9


No comments have yet been made

Similar Science resources:

See all Science resources »See all resources »