Biogas and anaerobic digestion of manure in Jühnde

[jean63]

And Japan is also interested in it, which does not surprise me. With the Nordic countries (Sweden, Norway, Iceland-hydrogen), Germany and Japan are very motivated by these clean techniques

http://www.bioenergiedorf.info/

And we French, our leaders are good only to make speeches and our students N.Hulot and JL Etienne ... etcet to report?

[jean63]

Find in www.solagro.org

The effects of anaerobic digestion on micropollutants and pathogens




How does anaerobic digestion of organic waste and by-products (municipal, industrial, or agricultural) help to ensure the return of organic matter to the soil while controlling the risks to the environment and health?

Synthesis of a bibliographic study (300 articles) conducted under the direction of SOLAGRO on behalf of ADEME in 1999 and more recent publications, this article shows how anaerobic digestion or anaerobic digestion:


Degrades or converts most halogenated aliphatic or monoaromatic compounds into non-toxic or low-toxicity compounds. More resistant polycyclic compounds generally form less toxic compounds.



Fixes heavy metals in unassimilable and non-toxic forms by living organisms.



Reduces 100 to 10.000 concentrations of bacteria, viruses and pathogens.

This technique has only advantages; but what are we waiting for? What do the lobbies do with all their benefits: they want to gorge themselves on money to die and let humans die of cancer or other diseases after being stuffed with heavy metals?

The complete study (in French) 440 ko + annexes 290 ko: downloadable in PDF format on the site and there are others.

[vincent27]

Anaerobic digestion is great.

It lacks a little something to safely produce, store and use the gas:
A way to bottle it.

Indeed, by compressing it as and when it is produced in standard gas bottles:
- Geographically offset use of production (security).
- Less big volume of gas.
- No risk of flashback to use thanks to the pressure in the bottles and existing standard protection means.
- Independent use and production (seasons, needs, buffer reserve in case of maintenance of the production facility ...)

[Christophe]

Exact vincent, especially since it is better to burn biogas (CO2 release) than let it escape like that (CH4 release is much more harmful for the greenhouse effect).

If we really wanted to actively fight against the greenhouse effect we should even make the burning (at least in a flare) of biogas in all the processes that release it. (subject to technological feasibility obviously)

Otherwise a general concern with biogas is the lack of "constancy" of its properties (according to what is put upstream) and the sulfur it contains ... (which tends to exclude its domestic use except if desulfurized before bottling ....)

[A2E]

it was not Jean Pain's technique with inner tubes?

[jpduval53]

Hi everybody

I know several methods to remove H2S from biogas

- the aquarium bubbler: the oxygen sent in small quantity precipitates the H2S

- the ball filter: the biogas passes through the filter, the CO2 and H2S stick on the balls

- The iron filings: passing the biogas through filings, H2S sticks on

- Biogas under pressure: CO2 and H2S are dissolved in water at 5 bar.

May be there in it else

For more information see EDEN association

For my part, we will conduct a feasibility study of a biogas insatallation to treat 1000 tons of waste.

If you have any information on the combined cycle gas tubines (57% of electricity and 43% of thermal)
or gas generator sets equipped with water doping,
I need advice.

My heat needs are almost zero, I already have two solar water heaters and a brand new vegetable oil boiler.

Thank you in advance

JP

[jean63]

aidiv

I went on the site of the farm Migneville: SUPER.

If all the farmers / breeders did that, it would already be a good economy of oil and reduction of methane release to fight against the greenhouse eddef, finally only benefits!

Regarding the site for the production of biogas from biomass, I also went to the site (translated into French that gives) =>
http://216.109.124.98/language/translat ... ergy.shtml

it gives me ideas

I have a huge pile of dead leaves in a corner of my land that I gave up to throw or burn, they are breaking down. It would take a watertight tank, I will go read in detail the content of the site "biomass".

[vincent27]

Same for me, I have 3000 m2 field, it produces incredible amounts of green waste that is worse broken down than burned.

I will look at boiler that can burn anything (stove) and use energy in a stirling. With some collectors on the chimney to get the coldest gas possible, we must be able to pull something.

Another small comment on solar hydrogen:
We recover solar energy
- to make steam,
- to make mechanical energy
- to make electricity
- to make hydrogen
- to make mechanical energy
- ....

yield * yield * yield * ...
I think there must not be much left in the end compared to the system implemented.

Do not forget to deal with energy problems in a global way, including the energy to produce and deliver the necessary equipment for the production of electricity ....

The simpler it is, the more profitable it is, the less maintenance there is to do, the less polluting it is to produce, ...

Excuse the ... !!!

[norman]

Hello everyone

In January, I saw a docu on china (on arte)
They use individual skeptic pits to recover methane for household and personal use
There would be several millions in the Chinese countryside
These are semi-hemispherical stratified pits, which are probably rather rudimentary but sufficient for cooking
I have not yet found or inquire more precisely so if someone has an opening on the china to collect some precisions
patrick

[emlaurent]

Anaerobic digestion is great.

It lacks a little something to safely produce, store and use the gas:
A way to bottle it.

Totally agree with the necessary development of meataturation from vegetable waste!
A flat on the storage of biogas:
The difficulty is that the storage of biogas in liquid form is very expensive in energy, because the liquefaction temperature of methane (main biogas compound) is -163 ° C.
If we choose to store it in gaseous form at high pressure, the weight of the tanks will be substantial. For the record, the bottles (B50) used to store nitrogen or helium under 200 bars weigh 75kg empty for 9m ^ 3 of relaxed gases ...
Not easy for handling! This is why we prefer to use biogas at the place of production, or close with distribution networks.
There are still improvements with carbon fiber tanks, lighter, to put on the roofs of buses for example.

A ++