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Biogas production


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Biogas production

  1. 1. Asad Rasheed 11-ARID-433
  2. 2. Contents  Introduction  Production  Anaerobic Digestors  Prdduction Process  Composition  Benefits
  3. 3. Introduction to Biogas  Biogas typically refers to a gas produced by the breakdown of organic matter in the absence of oxygen.  It is a renewable energy source, like solar and wind energy.  Can also be produced by different raw material like Sugarcane residue and maize silage
  4. 4. Cont…  Biogas is produced by the anaerobic digestion or fermentation of biodegradable materials such as manure, sewage, municipal waste, green waste, plant material, and crops.  Biogas comprises primarily methane (CH4) and carbon dioxide (CO2) and may have small amounts of hydrogen sulphide (H2S), moisture.
  5. 5. Cont…  The gases methane, hydrogen, and carbon monoxide (CO) can be combusted or oxidized with oxygen. This energy release allows biogas to be used as a fuel.  Biogas can also be cleaned and upgraded to natural gas standards when it becomes bio methane.
  6. 6. Production  Bio gas can be produced using anaerobic digesters.  During the process, as an air-tight tank transforms biomass waste into methane producing renewable energy that can be used for heating, electricity
  7. 7. Biogas Plant
  8. 8. Anaerobic Digestors  Anaerobic digestion is a series of processes in which microorganisms break down biodegradable material in the absence of oxygen.  It is used for industrial or domestic purposes to manage waste and/or to release energy.  The digestion process begins with bacterial hydrolysis of the input materials to break down insoluble organic polymers, such as carbohydrates, and make them available for other bacteria.
  9. 9. Production Process  Acidogenic bacteria then convert the sugars and amino acids into carbon dioxide, hydrogen, ammonia, and organic acids.  Acetogenic bacteria then convert these resulting organic acids into acetic acid, along with additional ammonia, hydrogen, and carbon dioxide.  Finally, methanogens convert these products to methane and carbon dioxide.
  10. 10. Process of Biogas Production
  11. 11. Composition  The composition of biogas varies depending upon the origin of the anaerobic digestion process.  Usually methane is 50 %, Co2 25 %, N 0-10 % , H 0-1 %.
  12. 12. Benefits  In production of gas for burning purpose at domestic or commercial purpose.  For production of Electricity.  In Decomposition of Biodegradable Materials  Working of Different Types of Engines