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)

882447 comment(s)

WilliamJeavy 28.01.2020

viagra coupons <a href=" http://canadianpharmacystorm.com/#y ">best canadian pharmacy for cialis</a>
free viagra http://canadianpharmacystorm.com/#r uk pharmacy <a href=" http://canpharmb3.com/#h ">uk pharmacy</a>
cialis dosage 40 mg dangerous http://canpharmb3.com/#n viagra effects <a href=" http://viagrawithoutdoctorspres.com/#4 ">viagra for women</a>
canadian pharmacy price checker http://viagrawithoutdoctorspres.com#

WilliamJeavy 28.01.2020

pfizer generic viagra <a href=" http://viagrawithoutdoctorspres.com/#d ">how to take viagra for maximum effect</a>
24 hr pharmacy near me http://viagrawithoutdoctorspres.com# canada drugs online <a href=" http://canpharmb3.com/#m ">cheap viagra</a>
best online pharmacy http://canpharmb3.com/#f legit canadian pharmacy online <a href=" http://cialisxtl.com/#5 ">cheapest cialis</a>
canadian pharmacy near me http://cialisxtl.com/#6

Evaweign 28.01.2020

<a href="http://diflucan10.com/">diflucan tablet</a>

Evaweign 28.01.2020

<a href="http://doxycyclinehycl.com/">buy doxycycline from canada</a>

Annaweign 28.01.2020

<a href="http://avodartgen.com/">avodart generic</a> <a href="http://avodart24.com/">avodart 1mg</a> <a href="http://vardenafill.com/">vardenafil hydrochloride</a> <a href="http://accutanrx.com/">accutane cream</a> <a href="http://diflucan10.com/">diflucan pill</a> <a href="http://prednisonetl.com/">generic prednisone</a> <a href="http://celebrexotc.com/">celebrex generic</a>

JamesLeaby 28.01.2020

daily use cialis cost <a href=" http://canadianpharmacystorm.com/#t ">cialis at a discount price</a>
canada online pharmacy http://canadianpharmacystorm.com/#u certified canadian international pharmacy <a href=" http://viagrawithoutdoctorspres.com/#7 ">herbal viagra</a>
viagra from canadian pharmacy http://viagrawithoutdoctorspres.com# buy viagra online <a href=" http://viagrawithoutdoctorspres.com/#v ">buy viagra online</a>
online canadian pharmacy reviews http://viagrawithoutdoctorspres.com#

Judyweign 28.01.2020

<a href="https://prednisonetl.com/">buying prednisone on line</a> <a href="https://levitramed.com/">generic levitra 20mg pills</a> <a href="https://vardenafill.com/">vardenafil over the counter</a> <a href="https://zoloft24.com/">zoloft medication</a> <a href="https://doxycycline20.com/">how to get doxycycline online</a> <a href="https://diflucan10.com/">buy diflucan without a prescription</a> <a href="https://amoxicillincaps.com/">amoxicillin 500mg cost</a> <a href="https://furosemidetab.com/">12.5 mg furosemide</a> <a href="https://doxycyclinehycl.com/">buy doxycycline pills online</a> <a href="https://diflucan5.com/">buy diflucan</a>

JamesLeaby 28.01.2020

pharmacy rx <a href=" http://cialisxtl.com/#7 ">fda warning list cialis</a>
canadian pharmacy cialis 20mg http://cialisxtl.com/#g cialis going generic in 2019 in us <a href=" http://canadianpharmacystorm.com/#3 ">viagra samples from pfizer</a>
buy viagra online http://canadianpharmacystorm.com/#j cialis going generic in 2019 in us <a href=" http://canpharmb3.com/#g ">which is better - cialis or viagra</a>
best canadian pharmacy for cialis http://canpharmb3.com/#y

Nickweign 28.01.2020

<a href="http://arimidexsale.com/">where can i buy arimidex</a> <a href="http://accutanrx.com/">accutane pharmacy</a> <a href="http://albuterol365.com/">albuterol 0.42</a> <a href="http://celebrexotc.com/">buy celebrex online no prescription</a> <a href="http://prednisonester.com/">prednisone 10 mg price</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