1. Asad Rasheed
11-ARID-433

2. Contents
 Introduction
 Production
 Anaerobic Digestors
 Prdduction Process
 Composition
 Benefits

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. 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. 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. 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. Biogas Plant

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. 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. Process of Biogas
Production

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. 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