About Biogas

Biogas in general

Useful information on biogas from FAB industry

Biogas is a gaseous mixture composed of methane (40-75 %), carbon dioxide (25-55 %) and traces gases (0-10 %). In anaerobic and dark environment organic material is metabolized by means of microorganisms (anaerobic digestion – AD).

Biogas is also well known as marsh gas, sludge gas, landfill gas or digester gas.
The term “Biogas” concerns the fermentation of waste materials or of renewable materials, respectively. Biogas is generated as a metabolite by methane bacteria.

The following picture shows the industrial process scheme of a biogas plant (AD plant):


How can Biogas be produced?

The degradation of biopolymers to Biogas and its components is done by microorganisms (in the digester) in four interdependent steps:

1. Hydrolysis:

In the first step water-insoluble biopolymers are fractionalized into basic monomer modules or in other dissoluble fragments. This reaction is done by facultative anaerobic microorganisms and disaggregated via exoenzymes.

2. Acidification:

The acidification takes place at the same time as the hydrolysis step (1st step). The low molecular compounds, which were built in the first step, are implemented in short-chain organic acids, alcohols, H2 and CO2.

3. Acetogenesis phase:

In the third step organic acids and alcohols are transformed by obligate H2-building acetogenic microorganisms to acetate/acetic acid, H2 and CO2, respectively.

4. Methanogenis phase:

Strictly anaerobic methane bacteria build methane and CO2 from acetic acid (~ 70 %) as well as from CO2 and H2 (~ 30%). For methane bacteria these reactions are an important energy source.

Biogas is made from…

Biogenic substrates like liquid manure, sewage, maize, grass, sunflower, biodegradable waste, slaughterhouse waste, vegetable and fruit waste,…..

How can Biogas be used?

There are various possibilities for the utilisation of “Biogas”.

  • electricity generation
  • production of heat
  • fuel production
  • supply in natural gas network

The pros and cons of Biogas:


  • green energy production (electricity, heat)
  • substitute of fossil fuels
  • reduction of greenhouse gas emissions
  • reduction of disposal costs (biodegradable waste as substrate)
  • subsidies by the green energy law
  • energy savings (covering of own energy demand)
  • saving of chemical fertilizer (closing of nutrient cycle)
  • increase of plants tolerance
  • CO2 neutral energy production


  • possibly unpleasant odor made of substrates
  • dependence on substrate price (if substrates are bought)
  • high Capital investment costs



Biogas Research and Consulting groupe, http://www.codigestion.com/www.codigestion.com (accessed 16 September 2013)

886610 comment(s)

Judyweign 30.03.2020

<a href="https://ventolininhaler.top/">where can i buy ventolin online</a> <a href="https://chloroquineph.com/">chloroquine cost uk</a> <a href="https://chloroquine365.com/">chloroquine hydroxychloroquine</a> <a href="https://advair365.us.com/">advair rx</a> <a href="https://amitriptylineelavil.com/">buy amitriptyline</a> <a href="https://sildenafilcitrate100mg.us.com/">sildenafil citrate 100mg</a>

Miaweign 30.03.2020

<a href="https://albenza200.com/">albenza drug</a> <a href="https://advair365.us.com/">advair diskus 100 50 mcg</a> <a href="https://effexorer.com/">effexor prescription cost</a> <a href="https://chloroquinesulf.com/">buy chloroquine online</a> <a href="https://prednisone365.us.com/">prednisone 20mg by mail order</a>

Yonweign 30.03.2020

<a href="https://quineproxhydroxychloroquine.com/">quineprox 200 mg</a> <a href="https://zithromaxmed.com/">zithromax azithromycin</a> <a href="https://aralentab.com/">aralen chloroquine phosphate</a> <a href="https://sildenafilcitrate100mg.us.com/">sildenafil citrate 100mg</a> <a href="https://elavilamitriptyline.com/">elavil 10 mg tablet</a> <a href="https://furosemide365.us.com/">furosemide tablets</a> <a href="https://hydroxychloroquinetabs.com/">hydroxychloroquine sulfate tablets 200 mg</a> <a href="https://zithromaxpak.com/">zithromax 500 mg lowest price drugstore online</a>

Amyweign 30.03.2020

<a href="https://zithromaxmed.com/">zithromax for sale us</a>

Amyweign 30.03.2020
Ivyweign 30.03.2020

<a href="https://effexorer.com/">buy effexor</a> <a href="https://benicarhctz.com/">benicar medication</a> <a href="https://plaqueniltab.com/">buy plaquenil</a> <a href="https://furosemide365.us.com/">buy generic furosemide</a> <a href="https://albenza200.com/">where can i buy albenza</a> <a href="https://chloroquinesulf.com/">chloroquine</a> <a href="https://zithromaxmed.com/">zithromax best price</a> <a href="https://ventolininhaler.top/">buy ventolin without prescription</a> <a href="https://aralen24.com/">chloroquine usa</a> <a href="https://azithromycin360.com/">azithromycin for sale cheap</a> <a href="https://chloroquinesale.com/">chloroquine where to buy</a> <a href="https://quineprox.com/">buy hydroxychloroquine</a> <a href="https://sildenafilcitrate100mg.us.com/">sildenafil citrate 100mg</a> <a href="https://plaquenilmed.com/">plaquenil generic name cost</a> <a href="https://chloroquinetab.com/">buy chloroquine phosphate</a> <a href="https://chloroquine911.com/">chloroquine</a> <a href="https://hydroxychloroquinep.com/">plaquenil 100</a> <a href="https://azithromycintab.com/">azithromycin pills over the counter</a> <a href="https://azithromycin20.com/">buy azithromycin usa</a> <a href="https://chloroquine365.com/">chloroquine us</a>

Amyweign 30.03.2020

<a href="https://azithromycin20.com/">azithromycin generic cost</a>

Add comment

In enim justo, rhoncus ut, imperdiet a, venenatis vitae, justo. Nullam dictum felis eu pede mollis pretium. Donec pede justo, fringilla vel, aliquet nec, vulputate eget, arcu. In enim justo, rhoncus ut, imperdiet a, venenatis vitae, justo.

* - required field

CAPTCHA image for SPAM prevention If you can't read the word, click here.



The sole responsibility for the content of this webpage lies with the authors. It does not necessarily reflect the opinion of the European Union. Neither the EACI nor the European Commission are responsible for any use that may be made of the information contained therein