Just one year ago, Alchemy Utilities was promising to revolutionise on-farm fertiliser and energy production. These days, the company is being sued by its own lawyers and its pilot plant lies idle on a farm near Emyvale, a border townland in north Monaghan. The high-tech rotating stainless steel cylinder, the size of a 40ft container, was switched on in September 2018 by engineers from Alchemy and its Finnish supplier, bringing continuous dry anaerobic digestion to Ireland for the first time.  Alchemy harnessed the new technology to process the farm’s poultry and cattle manure as well as grass and straw into…