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:


Pros:

  • 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

Cons:

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

 

References:

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

875021 comment(s)

tgndiete 19.03.2019

<a href="http://whatisketodiettuj.com/#">keto diet meal plan</a> keto diet meal plan pdf <a href="http://whatisketodiettuj.com/#">keto diet criticism</a>

gbyPhise 19.03.2019

http://cialiscials.com/# - viagra online canadian pharmacy buy viagra cheap <a href="http://cialiscials.com/#">canadian pharmacy online</a>

gecToche 19.03.2019

http://cialislisthec.com/# - cialis online pharmacy viagra australia <a href="http://cialislisthec.com/#">my canadian pharmacy</a>

GavriilClatt 19.03.2019

Весь день пересматривал материалы сети, случайно к своему восторгу обнаружил красивый веб-сайт. Гляньте: https://www.digitbox.net/ . Для нас вышеуказанный вебсайт показался довольно полезным. Хорошего дня!

bfhSNALT 18.03.2019

[url=http://ketodietecrt.com/#]effects of keto diet[/url] amazon keto diet <a href="http://ketodietecrt.com/#">keto diet and high cholesterol</a>

thsEduse 18.03.2019

[url=http://ketodietrecipesxef.com/#]nuts on keto diet[/url] best restaurants for keto diet <a href="http://ketodietrecipesxef.com/#">what's the keto diet</a>

gecToche 18.03.2019

[url=http://cialislisthec.com/#]how to buy cialis[/url] viagra buy <a href="http://cialislisthec.com/#">canadian pharmacy ratings</a>

canadian pharmacy 18.03.2019

treatment definition science hair transplant cost
http://canadinpharmacy.us.com canadian pharmacy
what to do about arthritis dust mite allergy
<a href="http://canadinpharmacy.us.com">canadian pharmacy</a>

bfhSNALT 18.03.2019

[url=http://ketodietecrt.com/#]keto diet without gallbladder[/url] keto diet eating out <a href="http://ketodietecrt.com/#">starting a keto diet</a>

ikqinema 18.03.2019

[url=http://ketodietlistdfk.com/#]basic keto diet[/url] keto diet while pregnant <a href="http://ketodietlistdfk.com/#">keto diet recipes breakfast</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.

*

DOWNLOAD NOW !

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