How biogas 1 m3 waste, at least, no

[Did67]

Hello,
Still with the same idea, Having read a report on the brief, he spoke among other things of what he called nitrogen hunger.
Apparently following the carbon intake.
An idea that I tried but that momentarily, a vermicompostor, what would be the disadvantages advantages, of principle, say to make them digested 100 kg of straw.
Well, humidity is certainly better, I also saw that it was necessary to bring them from time to time fine sand which apparently maintains their digestive system.
And what would be good on the qualitative result of luer droppings.
a + claude

1) To continue this "basic agronomy treatise":

When you put in the ground a compound very rich in cellulose and / or lignin, the microorganisms which will "digest" it, they do not do it to please you! They do it for food. But like any living being, they are not made up only of cellulose, nor of carbohydrates ... They also need proteins, even if they are capable of synthesizing it. So since your organic matter contains very little of it (otherwise, we wouldn't need meat / fish or pulses!), They will draw the nitrogen it takes to make these proteins in the soil. ..

So the process of decomposition of these cellulosic and / or woody organic matter (same thing for straw, same thing for your sorghum!) Will be directly in competition with the plants: we say that there is a "hunger for" nitrogen". Plants grown on such soil are initially yellower, more puny ...

2) It will be the same for your earthworms: with that straw, they will soon run out of protein and ... will probably not develop that much!

On the other hand, if you do this when you find grass clippings, this will be the best: cellulose = energy; very green lawn = rich in nitrogen, there, it will gas !!!

[chatelot16]

remark on the main question

how much gas for 1 m3 of waste: I don't care! waste costs nothing

more important question: how long should the waste remain in the tank to completely methanize?

if the complete anaerobic digestion lasts 1 month, a tank 30 times larger than the daily quantity of waste to be anaerobic digestion is required

it is the depreciation of the methanizer which makes the price of methane, it is not the quantity of waste used

we might prefer to stuff the methanizer to make it produce more even if the methanization is not complete and there is energy left in what came out of the tank ... it will not release methane to pollute the atmosphere if what came out of the tank is put in the open air: it no longer makes methane but only CO2

[dedeleco]

basic course answers:
http://fr.wikipedia.org/wiki/M%C3%A9thanisation
http://en.wikipedia.org/wiki/Anaerobic_digestion
http://www.methanisation.info/
http://www.methanisation.info/methanisa ... definition
http://www.solagro.org/site/im_user/193 ... ricole.pdf

response on the time required depending on the temperature and the system chosen:

A simplified generic chemical equation for the overall processes outlined above is as follows:
C6H12O6 → 3CO2 + 3CH4

Methanogenic Archaea have needs in specific trace elements such as iron, molybdenum, nickel, magnesium, cobalt, copper, tungsten and selenium. The partial pressure of hydrogen must remain below 10-4 bar in the gas phase.

Apartments
The residence time in a digester varies with the amount and type of feed material, the configuration of the digestion system, and whether it is one-stage or two-stage.

In the case of single-stage thermophilic digestion, residence times may be in the region of 14 days, which, compared to mesophilic digestion, is relatively fast. The plug-flow nature of some of these systems will mean that the full degradation of the material may not have been realized in this timescale. In this event, digestate exiting the system will be darker in color and will typically have more odor. [Citation needed]

In two-stage mesophilic digestion, residence time may vary between 15 and 40 days. [67]

In the case of mesophilic UASB digestion, hydraulic residence times can be (1 hour to 1 day) and solid retention times can be up to 90 days. In this manner, the UASB system is able to separate solid an hydraulic retention times with the usage of a sludge blanket. [68]

Continuous digesters have mechanical or hydraulic devices, depending on the level of solids in the material, to mix the contents enabling the bacteria and the food to be in contact. They also allow excess material to be continuously extracted to maintain a reasonably constant volume within the digestion tanks.

I wonder if simply drying in the sun and then burning like Yak's dung is not as simple and effective in a lot of cases ???

Personally I try to put nothing vegetable waste in the trash and keep everything in my recycled gardens !!!

The mowed lawns and grasses thrown in the trash for decades, end up sterile and full of moss !!!!

[clasou]

Hello
@did67
Don't bother with the basics, when I quote the end of nitrogen, it's just so that whoever reads to me knows what I'm talking about, in their language, since I call among other things brf, while it is sometimes brf or mulch.
Good info is that the green ground need nitrogen (lawn) to be able to appreciate the straw.

So my vermiculturalist, would only serve me to keep the colony intact during the hot months.

Anyone have one in real.
a + claude

[chatelot16]

I wonder if just drying in the sun and then burning like Yak's dung is not as simple and efficient in a lot of cases?

everything depends on the climate: in a dry country with sun drying is easier than at home

the waste that I find interesting to methanize decay if we do not dry it fast enough

anaerobic digestion is not the miracle thing that must engulf everything, leaving nothing to the other way

[moinsdewatt]

...He believes like the square of dimensions and therefore wood of 100mm in diameter dries more than 100x100 = 10000 times slower than this same wood of 1mm in diameter !!
......

source of this statement?

[chatelot16]

difficult to justify ...

this may be true for an isolated grain: a grain of sawdust dries faster than a massive log

but 10 tons of log simply tidy dry as a single log, slowly but surely

10 tonnes of sawdust in a pile does not dry: to dry them you need a silo and ventilation

fine grinding is not that simple

and the sawdust does not rot too quickly ... the other vegetable waste is worse

[chatelot16]

the example of sawdust is bad, anyway the wood does not methanize

what is methanized is precisely what dries the worst: grass leaf food waste

[dedeleco]

.

He believes like the square of dimensions and therefore wood of 100mm in diameter dries more than 100x100 = 10000 times slower than this same wood of 1mm in diameter !!

source of this statement?

Diffusion equation for anything, moving at random, in a stationary uniform medium:
heat, water vapor or liquid water in wood, radio waves or microwaves in a conductive metal, neutrons in a reactor, etc. !!!
!!!!
Very verified by all of us, by drying the linen finely spread or in a round ball !!

read
http://fr.wikipedia.org/wiki/Conduction_thermique
and see that all the formulas are in Dt / L ^ 2 with diffusion constant t time in L es dimensions !!!
for just a dimensional reason.

[chatelot16]

Very verified by all of us, by drying the linen finely spread or in a round ball !!

exactly it is not the fineness of the linen fibers that counts, but the thickness of the pile of linen

so to dry waste the fine wood is useless if we do not have the means to put them in a very fine layer to dry

very thin layer it's easy for linen hanging on a thread ... for waste I don't see a simple solution