Digestate disposal still a burden for AD but new processes may help

There is growing interest in techniques aimed at making digestate from anaerobic digestion plants easier to manage. The companies involved say the technologies could give waste firms much more flexibility over their digestate

Anaerobic digestion (AD) is growing in importance as an energy-from-waste technique, but a well-attended London conference showed there is much interest in making it easier to manage.

There are about 30 on-farm anaerobic digestion plants operating in the UK, with another 22 off-farm sites, which process municipal and commercial food waste. There are believed to be another 50 or so in the planning stages.

Although AD is increasing, projects are often hamstrung by the need to dispose of digestate. It is recognised as a valuable resource for farming, but nobody believes it is possible to sell it to farmers.

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