Hello,
As Remundo says, well-dried grass cuts must be able to burn. To compact the lawn freshly cut into briquettes, when the turf is still very green, malleable and compressible, must be quite easy provided you have a press of course.
I had asked the same question for the wood chips from brushcutting, and there is a discussion on this site about it. I will try to find her.
For my part I imagined I could do a press simply with a long lever that compresses a piston in a large metal tube but I think I remember that Ahmed explained that it needed a compression of several tons impossible to obtain by hand and that it was also necessary to very high temperatures to agglomerate the compressed material.
Someone had also published photos on the ecology of a DIY press with a hydraulic crack fixed in a frame and that seemed very simple to do and effective.
There is a lot of waste produced in very large volumes, grass cuts are part of it, especially in this season, and end up loose in the dump while they could be easily recovered.
To return to the manufacture of combustible logs, we can see that there are various sources of materials that are common waste and that can be converted into fuel.
Here is a list of garbage I've already heard about log transformation projects:
- so the grass, or more precisely the cuts of grass
- wood chips
- sawdust
- the leaves of trees
- the bark of wood with which the compressed logs called "night logs" are made because they burn very slowly.
- newsprint or advertisements that fill our mailboxes
- Horse manure and more generally all kinds of excrement of animal origin (cow dung, Yach dung, sheep, goats, etc.).
- (according to Chatelot16, PE plastic would burn very well without polluting ...)
- etc
It would be very interesting to know the combustion characteristics of each of these wastes, as well as the advantages and disadvantages for each of them, and to have simple compression techniques to obtain tips.
If someone has a summary table on hand ...
To finish my comment on the subject, by doing a search on the net we find quite a lot of experimental feedback on the subject.
I found this one which seems to me interesting and could be taken again with the clippings of grass:
I have the solution I use for a long time. It is long (drying 1 years) but it works.
Do not take sawdust, leaves and tree sizes can be used
You need a plant grinder. I also put paper (not glossy paper, but the newspaper, p'tites announcements and misfires of my printer).
And for the binder, I use a starch. (approx 2%). Either rice break (50 kg cheap pet food, the idea came to me looking at the consistency of a sushi)
Either potato starch or starchy residues (potatoes from the bottom of the potato crate which have branches that grow and are all soft)
By combining the cellulose of the crushed and moistened paper and the starch mixed with hot water and mixing with the crushed vegetables too, I get a kind of mashed potatoes that I pour into recycling molds (the plastic tray of the frit hut)
In fact when I do it I take the day, and to mix I use a small concrete mixer
And I let them dry for one year in a sheltered and ventilated place.
After I unmold some kind of briquettes in the form of tray sintered. There you go.
And I start every year every time I pick up the leaves of my garden and I size my plants.
At home, green waste is not picked up, I have to drive them to the rubbish.
The energy that I use to make my bows (vegetable paper electric grinder + concrete mixer for mixing + hot water for starchy foods) and roughly equivalent to my fuel consumption to go to the waste disposal.
Check my logs is all good.