Can AD plants utilise wood fibre as a feedstock?

Exfarmer

Member
Location
Bury St Edmunds
Its the lignin that is the problem, if it is very low lignin then digestibility can be reasonable. High and it will pass through.
Well that is the case for a cow :)
There was work on feeding wood to cattle, as young brush can and is in certain parts of the world used as a feed. Other animals eat their own dung as 2 passes give a better chance of catching the energy.
 

thesilentone

Member
Livestock Farmer
Location
Cumbria
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Fowler VF

Member
Location
Herefordshire
Hydrolysis. High pressure, high temperature, chemicals. Expensive!
If you could crack a cheap and effective way of breaking down plant based lignin to make it digestible then feeding a bio digester would be the least of your priorities. Its the holy grail for a whole host of issues.
We worked on a desk based research project into some of this many years ago, yes it can be done but the costs are just totally prohibitive and most likely will remain so. If you are going to invest that much time, effort and money into processing wood then there are more interesting things to do. Pyrolysis can be made to work, I have been involved in a plant in Holland that converts wood fines into pyrolysis oil with great success. The oil goes to a refinery, alongside crude oil to make fuel. But its a £50m plant, it works reliably, but its still little more than a proof of concept. The economics of even this are pretty marginal.
 

How much

Member
Location
North East
This video shows Asian knotweed , that i assume is what we know as Japanese knotweed being made into silage and mixed with maize , it doesn't say it being used in a digester but by the looks and scale of it I assume it is.
Although quite why you would encourage its cultivation i'm not sure although its not wood but does make you wonder what cant be used.

 
This video shows Asian knotweed , that i assume is what we know as Japanese knotweed being made into silage and mixed with maize , it doesn't say it being used in a digester but by the looks and scale of it I assume it is.
Although quite why you would encourage its cultivation i'm not sure although its not wood but does make you wonder what cant be used.



That’s just crazy! Amazing what turns up on YouTube
 

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Red Tractor drops launch of green farming scheme amid anger from farmers

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As reported in Independent


quote: “Red Tractor has confirmed it is dropping plans to launch its green farming assurance standard in April“

read the TFF thread here: https://thefarmingforum.co.uk/index.php?threads/gfc-was-to-go-ahead-now-not-going-ahead.405234/
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