Some figures on the biogas?

[dedeleco]

And when we burn methane what is left? Are there still polluting elements?
.

Taught at the BAC:
CH4 + 2.O2 -> CO2 + 2.H20

and so well burned, few parasitic pollutants and less CO2 than oil seen H4 for a C instead of a little more H2 for a C in fuel.
Basics to know to assimilate thoroughly by reading the links in these articles too:
http://fr.wikipedia.org/wiki/M%C3%A9thane
http://fr.wikipedia.org/wiki/Pouvoir_m% ... og%C3%A8ne
http://fr.wikipedia.org/wiki/Digesteur
http://fr.wikipedia.org/wiki/M%C3%A9thanisation
in angalis much more info:
http://en.wikipedia.org/wiki/Anaerobic_digestion
http://en.wikipedia.org/wiki/Biogas
http://fr.wikipedia.org/wiki/Biogaz
the Germans are good in chemistry and technique:
http://de.wikipedia.org/wiki/Biogas
http://de.wikipedia.org/wiki/Biogasanlage
an installation :
http://www.strom-online.ch/vergaerungsa ... aktiv.html
production calculations:
http://www.biomasse-sh.de/biogasrechner.html



A cow makes lots of methane by digestion, a real itinerant methanizer, but it would have to be recovered essentially by its mouth and separated from the CO2 of its breathing.

videos search on youtube or dailymotion, or google with methanisation keywords, etc ... while remaining critical.

The earth and the ocean floor are stuffed with CH4, which is difficult to recover.
Saturn's Titan satellite is crammed with methane:
http://fr.wikipedia.org/w/index.php?tit ... &section=6

[mamzelo]

and when we speak of "methanogenic power", are we considering 100% methane or biogas with its various components?

[dedeleco]

In m3 of biogas per tonne of raw material

http://fr.wikipedia.org/wiki/Pouvoir_m% ... og%C3%A8ne
biogas that burns and heats.

Read all posts thoroughly:
https://www.econologie.com/forums/biogaz-met ... t2338.html

[chatelot16]

and when we speak of "methanogenic power", are we considering 100% methane or biogas with its various components?

it is to be checked for each data source, because between the volume of biogas at 50% methane, and the volume of pure methane it changes seriously

worse with the ways to copy data anywhere and put them on the net without precision we ended up having completely false figures

[Gaston]

In m3 of biogas per tonne of raw material

http://fr.wikipedia.org/wiki/Pouvoir_m% ... og%C3%A8ne
biogas that burns and heats.

Read all posts thoroughly:
https://www.econologie.com/forums/biogaz-met ... t2338.html

The only source cited by Wikipedia on this subject is the thread on Econology

[dedeleco]

read the official website of the ministry:
http://www.developpement-durable.gouv.f ... 13039.html
minimum-minimorum:

All organic waste, with the exception of woody waste (wood waste), can be treated by methanation, and in particular liquid waste and effluents. The main materials treated in this way are industrial effluents and urban or industrial sewage sludge. This treatment has recently been developed in France on household waste (mixed or after separate collection of the fermentable fraction) and on agricultural waste.
The methanisation of organic matter thus leads to the production:

of a combustible gas fraction, the biogas, mainly composed of methane (55 to 60% CH4) and carbon dioxide (40 to 45% CO2) and usually containing traces of hydrogen sulfide (H2S), a particularly toxic gas ;

digestate (residue composed of non-degraded organic elements), comprising a solid fraction and a liquid fraction. The solid fraction can be spread or composted, subject to its agronomic interest and its safety. The liquid fraction can be used to replace chemical fertilizers.

Methanation treatment thus offers the possibility of a double recovery of waste, contributing to the production of stabilized organic amendments and fuel

http://www.biosphere-fontainebleau-gati ... uimeth.pdf
http://www.naskeo.com/


A small project:
http://fr.howtopedia.org/wiki/Comment_r ... masse_ARTI
http://en.howtopedia.org/wiki/How_to_Bu ... s_Digestor
a simple realization:
http://www.onpeutlefaire.com/795
http://www.onpeutlefaire.com/assets/doc ... esteur.pdf

great simplicity in the world:
http://www.fao.org/docrep/w5256t/w5256t06.htm

basics namely:
http://www.debian-fr.org/quelle-quantit ... 33446.html

http://www.fabrication-de-la-biere.wiki ... tation.php
http://www.methanisation.info/

Detailed control information to read:
http://www.hach-lange.fr/shop/action_q/ ... k/M/MbFd3g



details on archaeosbacteria:
http://www.ecosociosystemes.fr/archaebacteries.html

Methanogenic arches are strict anaerobic organisms for which the slightest trace of gaseous oxygen is, if not fatal, at least a potent metabolic inhibitor. Methanogenic arches are autotrophic and chemotrophic organisms.

Methane is produced in a reducing medium, in the presence of water, from carbon dioxide or from various organic materials (acids, aldehydes, amines, sulfides, etc.). Methanisation is a very exergonic reaction, that is to say that it releases a large amount of heat. In biogas reactors, this heat production is used to maintain the medium at a fairly high temperature (> 37 ° C) very favorable to the development of methanogenic archaea.

The methanogenic arches most often live in symbiosis with strict anaerobic eubacteria which provide them with the substrates (CO2, acids, aldehydes and ketones, etc.) that they need for their metabolisms. The main genera of anaerobic bacteria symbionts of methane arches are Bacteroides, Butyvibrio, Bifidobacterium, Lactobacillus, Clostridium, etc.

Methanization is a very effective reaction to destroy organic matter

With air, methane like city gas explodes by demolishing an entire house or building.
http://forums.futura-sciences.com/envir ... ion-3.html
http://dcroissance.blog4ever.com/blog/l ... ive__.html
http://fr.ekopedia.org/Agrocarburant

Finally, if you find that there is too much CO2 produced, you can transform this CO2 into methane in the sun (to be improved):
http://www.lepoint.fr/actualites-scienc ... 9/0/324883

We can also feed algae in the sun with this CO2 which will make organic matter to give oil or gas.
http://fr.ekopedia.org/w/index.php?titl ... section=13
http://www.eden-enr.org/

Life before on Earth without oxygen over 600 million years ago.
http://fr.wikipedia.org/wiki/Origines_de_la_vie

[chatelot16]

Methanization is a very exergonic reaction, that is to say it releases a large amount of heat. In biogas reactors, this heat production is used to maintain the medium at a fairly high temperature (> 37 ° C) very favorable to the development of methanogenic archaea.

disagree: methanization heats very little, unlike composting: conclusion must be heated by an external means ... if the methanizer is too small and poorly insulated thermally all the methane produced is not sufficient for heating

The production of methane takes place in a reducing medium, in the presence of water, from carbon dioxide or various organic materials.

interesting remark: the CO2 is necessary ... which explains why an energetic mixing is useful for a good methanisation: it is necessary to put the CO2 back in the liquid during methanisation so that the bacteria consume it: that explains the good result with bubbling soldering of the biogas produced in the tank

[dedeleco]

certain that:

the methanizer is too small and poorly insulated thermally all the methane produced is not sufficient for heating

but with large heaps per ton, like for manure with straws, or thermally insulated (to try for small dimensions ??), it heats up, and even can catch fire !!

[chatelot16]

when a pile of manure heats it is not methanisation, it heats because there is air: all the energy is lost in CO2 ... except small proportion in methane

fermentation never heats enough to ignite normal fuel: on the other hand, certain fermentation produces spontaneously flammable gases, such as fiery fire in cemeteries: in hay it ignites

[moinsdewatt]

An anaerobic digestion unit in Auch to recover 40000 tonnes of organic waste

15.02.12

Naskeo Environnement and Verdesis announce the start of construction of the “Biogas du Grand Auch” anaerobic digestion unit in Auch, in the Gers.

This draft cogeneration of renewable electricity (1,1 MW) and heat (1,1 MW) from biomass, which is scheduled to start in the first quarter of 2013, will make it possible to recover more than 40 tonnes of organic residues per year. The anaerobic digestion unit will be able to process 20 tonnes of organic matter of different types each year: 80% agricultural waste and XNUMX% waste from local food industries. It will be open to all local players in the collection and treatment of waste.

http://www.mat-environnement.com/chanti ... niques.php

and Enerzine article: http://www.enerzine.com/12/13527+la-con ... ncee+.html