Biogas is produced through the anaerobic digestion of organic matter such as manure, food waste, and crops. It is comprised primarily of methane and carbon dioxide. The digestion occurs in anaerobic digesters, which are air-tight tanks that transform biomass into methane gas. This biogas can then be used as an energy source for heating, electricity, or transportation fuel after processing. Producing biogas also has environmental benefits as it manages waste and provides renewable energy.

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