Bio 4.7 Biogas 3.0 / 5 based on 1 rating ? BiologyHuman impact on the environmentGCSEAQA Created by: DanCreated on: 01-04-13 10:45 What is biogas? Gas produced from organic substances 1 of 12 What is anaerobic respiration? Respiration without oxygen 2 of 12 How is biogas made briefly?(No detail required at this stage) Organic waste gets turned into biogas by bacteria 3 of 12 What sort of organic waste is needed? Any thing that contains carbohydrates 4 of 12 What conditions do biogas factories provide for fermentation? They provide suitable temperatures for bacteria and no oxygen 5 of 12 Why is suitable temperature needed? So the bacteria can work at its fastest 6 of 12 Why is no oxygen important? So that the bacteria must respire anaerobically producing biogas 7 of 12 What is the main biogas made through out the world? Methane (CH4) 8 of 12 Why are some generators buried under ground? All adaptation of generators such as thick walls, are all to keep an optimum working temperature for bacteria 9 of 12 Suggest some ways large scale factories could get cheap organic waste? Sewage works, Sugar factories. Suggest anything that is sensible and gives waste organic material to get marks. 10 of 12 What can be added to the bacteria and organic waste to stop oxygen reaching the bacteria? Oil 11 of 12 Describe the processes that occur in a biogas generator (Detail) Organic waste is fermented by bacteria through anaerobic respiration producing biogas. 12 of 12
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