Worth digging deeper for more information. Their is an allowance for wear differential per axle, however it is usually quite small. In addition weight per axle also plays a part as does pressure. The obvious advice you will get is to replace them all (especially from tyre supplier).
As daft is you think it maybe, a bit of bale tape round is better than it is now, and reduces the risk.
It looks like whoever put the machine on, forgot to put the pto rest support in right place afterwards.
To expand on the above.
Matching the nutrient requirement of our land is key, this does not necessarily need to be done at the AD Plant. It could be done elsewhere, say in a storage tank at the point of use where the mass balance could be adjusted with additives.
We need to start at the end...
In the UK we were faced with a major challenge. Much of our dated energy production plants were coming to the end of their life, and little in the pipeline to replace them.
Kyoto committed us to a renewables target over the coming years, and renewables was not only the way, but also helped...
They use floculants and coagulants, this explains it fairly well.
On the diagram, where is says "secondary treatment" it is after that, that sludge becomes fit to be used as a fertilizer.
Mm, I beg to differ.
Most shooters are excellent conservationist, putting back way more than is taken.
You have no idea what the World population of Mallard is, only what you see and hear.
Reared Mallard are not very good breeders with each other, never mind wild duck.
Woodcock is another...
The nutrient in Digestate is exactly what was in the feed-stock (well almost), and you are correct it varies greatly depending what you put in.
eg: Maize is not to high in N (about half that of grass) however poultry manure is high in N.
Food waste is fairly good in N P and K.
So, the ideal...
That is exactly what happens at the sewage treatment plant, where the solids are separated and used as fertilizer. The treatment is to kill pathogens in the solids, the liquid is treated by varying methods and returned to the water course.
Or, we are using perfectly good land that could be used to grow feed-stock to produce energy, we need both food and energy, we can't survive without either of them.
AD is the only flexible renewable that re-cycles all the nutrient AND produces base load energy. No other source of renewable...