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How does a biogas plant work?

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Esther Eumann

on 15 January 2015

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Transcript of How does a biogas plant work?

How does a biogas plant work?
Organic waste products or energy crops are chopped up, stirred together and put in biogas plant as a substrate.
In the fermenter, heated to approx. 38-40 °C, the substrate is decomposed by micro organisms under exclusion of light and oxygen
The final product of this fermentation process is biogas with methane as the main ingredient.
The biogas generated is stored in the roof of the tank
The methane content and quality of the biogas are enhanced to make it more like conventional natural gas.
The biogas is burned in the combined heat and power plant (CHPP) to generate electricity and heat.
The electric power is fed directly into the power grid or to households.
generated heat can be used to heat buildings or to be fed into a district heating network
also used to heat fermentation tank
substrate is transported to the fermentation residues end storage tank
can be retrieved from there for further utilisation.
can be used as high quality fertilizer
lower viscosity -> penetrates into the ground more quickly
quite often higher fertilizer value
less intense smell.
can also be dried and used as a dry fertilizer.
Biogas plants
A presentation by Steffi Gregel & Esther Eumann
What is a biogas plant?
Anaerobic digester
Produces biogas from animal waste or energy crops
Composed of digester and a gas holder
a type of biofuel
is produced through the breakdown of organic matter in the absence of oxygen
composed mainly of methane (CH4) and carbon dioxide (CO2)
can be used e.g. for heating, power generation and as a vehicle fuel
Advantages & Disadvantages
of biogas plants
What is a biogas plant?
How does it work?
Advantages & disadvantages
Thank you for listening!
Full transcript