Presentation on theme: "BIOMASS. Biomass is a biological material derived from living, or recently living organisms. This often means plant based material, but biomass can."— Presentation transcript:
Biomass is a biological material derived from living, or recently living organisms. This often means plant based material, but biomass can equally apply to both animal and vegetable derived material. Biomass is any organic matter – wood, crops, seaweed, animal waste – that can be used as an energy source. It is our oldest energy source (1812) It is a renewable (flow) source because its supplies are not limited. DEFINITION
In 1850, 85% of the world’s total primary energy supply was derived from biomass whereas, in 2005, 85% of the world’s supply was from fossil fuels.
There are five basic categories of material: Firewood Crops Animal waste Food waste Industrial waste
Biomass takes carbon out of the atmosphere while it is growing, and returns it as it is burned. If it is managed on a sustainable basis, biomass is harvested as part of a constantly replenished crop. This is either during woodland or arboricultural management or as part of a continuous programme of replanting with the new growth taking CO 2 from the atmosphere. This maintains a closed carbon cycle with no net increase in atmospheric CO 2 levels.
Offers pro- environmental opportunities for a cleaner future of our planet It is a growing field for higher education focus It provides economic advantages as public awareness and implementation grows
Biomass is a flexible energy source and, can be stored and used as a fuel when required. Approximately 6 million tonnes of waste wood and 9 million tonnes of waste food are sent to landfill each year in the UK. This has the potential to generate 42TWh of electricity pa (i.e. 18% of the UK’s renewable energy target).
Biomass is a cost effective way to deliver 30% of the UK’s renewable energy target by 2020, rising to 50% if biofuel for transport is included. The total energy contained in existing UK biomass is equivalent to between 3.1% and 3.7% of the total UK primary energy consumption and this could rise to 10% by 2030 depending on improvements in energy crop management and the effective utilisation of waste materials.
Growing crops specifically for biomass could compete with space needed for food crops Expensive Inefficient Harmful as gives off methane Consumes more fuel Growing it and transporting can be a big problem and may need to be transported long distances which is expensive
This table shows the cost of each fuel… 1.How much do wood pellets cost per unit and per Kilo Watt Hour? 2.How about Wood chips?
Watch this YouTube video on ‘What is Biomass?’ http://www.youtube.com/watch?v=dQ-cIVJuDks
To consolidate, using the notes you have made, and the handout on ‘Biomass Energy’ answer the 5 mark exam style question. Answering the question: 1) Sustainable, explain what it means. 2) What is Biomass? 3) Look at both sides of the argument (for & against). 4) Your opinion and conclusion. “Is Biomass a sustainable energy resource?” (5 marks)