1. Biomass Energy Zespół Szkół Ogólnokształcących nr7 in Katowice

2. Biomass energy What is biomas energy? Biomass is plant and animal matter, such as wood, straw, sewage and waste food. We can burn these natural materials to produce heat and electricty, or use them to produce transport fuels such as biodiesel and bioethanol. This is called biomas energy.

3. Advantages of biomass energy It does not use up limited resources such as coal. Biomass cannot run out! It stops landfill gas from going into the air, where it could damage the atmosphere. It does not rely on the weather, so it can provide energy all the time.

4. Possible disadvantages Waste materials have to be collected, which can be costly. Burning fuels (e.g. Wood chips and rubbish) does cause some air pollution.

5. Experiment with biomass 1.Collect enough freshly cut grass cuttings to fill a bin liner half or two-thirds full 2.As soon as the grass cuttings are ine the bag, measure their temperature with a thermometer. Record this figure below. Temperature of grass cuttings at start of test: 18 ºC 3.Close the bag tightly to keep air out, and seal it with tape. Put the bag into the box and leave it for 24 hours. 4.After 24 hours, open the bag and take the temperature of the grass in the middle of the bag. Record the temperature below. Temperature of grass cuttings at end of test: 21 ºC 5.Feel the grass in the bag ( Wash your hands afterwards.) What does it feel like?

6. Conclusions: Bacteria in the grass breaking it down. This is called decomposition. The grass gives off biomass energy in the form of heat and gas. This is why compost heaps are usually warm.

7. Biomass is: a)Both plant and animal matter b)Either plant matter or animal one c)Neither plant nor animal

8. Check your answer. a)True, plant and animal matter create biomass. b)False, both mentioned matters create biomass. c)False, biomass consists of animal and plant matter.

9. How do bacteria influence the grass? a)Bacteria do not influence the grass growth b)Bacteria break the grass down. c)Bacteria do not appear in the grass.

10. Check your answer. a)False, bacteria do influence the grass growth. b)True, it is proved by the heat production. c)False, bacteria do live in the grass.

11. Can fuel be produced from biomass? a)No, it is impossible. b)Only the fuel’s additional substances can be produced. c)It is widely known practise.

12. Check your answer. a)False, it is possible and we do it. b)False, biomass can be used as fuel itself. c)True, fuel is produces from rape (biomass).

13. Thank you for your attention. Created by: Marcin Kurka and Tomasz Świątkowski. (rodimus) (vierra)