biogas

Question 1

how is methane produced?

Answer 1

through anaerobic decay

Question 2

what is biogas made up of?

Answer 2

methane

Question 3

why is biogas useful?

Answer 3

it can be burned as a fuel

Question 4

how is biogas obtained?

Answer 4

-through the anaerobic decay of plant and animal waste
-sludge waste in industry

Question 5

how is biogas made?

Answer 5

in a fermenter called a digester or generator

Question 6

what is important about biogas generators and why?

Answer 6

they need to be kept at a constant temperature to keep the microorganisms respiring

Question 7

uses of biogas

Answer 7

-heating
-cooking
-lighting
-power a turbine
-generate electricity

Question 8

why does biogas have to be used straight away?

Answer 8

it can’t be stored as a liquid as it needs too high a pressure

Question 9

batch generators

Answer 9

-make biogas in small batches
-manually loaded with waste
-left to digest
-by-products cleared away at the end

Question 10

continuous generators

Answer 10

-make biogas all the time
-waste is continuously fed in
-biogas produced at a steady rate
-large-scale biogas products

Question 11

what does a biogas generator need to have?

Answer 11

-an inlet for waste material
-an outlet for digested material to be removed
-an outlet for biogas to be piped to where it is needed

Question 12

what is the waste material used for?

Answer 12

fertilisers