Staying power – harnessing sun, wind and waste
Aug 15, 2019
3 minutes
IN search of the perfect renewable technology, I once found myself staring at a giant gut-like sausage machine with a continual feed of farm waste at one end, fermenting steadily through its passage, releasing methane as it went, to deposit a fibrous solid compost and digestate liquid at the other. It was an excellent piece of engineering in principle, however, the complexities of managing feedstock and avoiding any unwanted belches made this small, farm-scale anaerobic digestion plant hard to envisage ever being economically
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