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Don't forget sewage sludge as another well utilised source for AD, the majority of the WaSC's are now approaching 100% sludge to AD, think they all will be by 2025.
Likely to see greater energy recovery from sludge in the future as well if sludge to land is closed as a disposal route which it already has in parts of Scotland as the Japanese won't buy whisky where sludge to land was used in the crop production. So likely to see the waste sludge burned in one form or another.
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It's been a few years since I did any work with AD operators, so I hope things have changed. Back then, thanks to government subsidies, they were being built at an unrealistic pace and on the flawed assumption that food waste would remain at the same levels.
Given the amount of energy used in growing, harvesting, processing and distributing food that was eventually thrown away far outstripped the amount of energy it could produce from AD, it seemed to make much more sense to reduce the huge amount of avoidable and unnecessary waste in the first place. And the proliferation of plants meant that none were operating at more than 65% capacity and their feed stock was poor and heavily contaminated. Cue farmers growing crops to be sold as AD "fuel", a not so great use of agricultural land. Instead of charging gate fees for waste, operators were paying for feed stock and their subsidies had gone.
Things may have moved on in the last few years, but I thought it sucked.
We only burn rubbish so personally I’d be happy giving that away.
The future in the UK in my eyes anyway is Wind, Solar and AD. AD runs incredible off whisky and brewery waste but needs a lot of it, you can run it off farm waste if you have sugar beet to go with it but it struggles without.
Burning plants I hate for many reasons.
AD plants that also burn are a strange concept and I’ve still not seen one fully work to maximum output although they look good on paper.
I am a projects and commissioning manager for a large company in their BioEnergy section. I see a lot of these plants every week except for the last month where I’ve seen a lot of video calls.