![No](/images/layout/cross.gif) Unsustainable waste of resources |
![No](/images/layout/cross.gif) Some CH4 to atmosphere, leachate problems |
![Yes](/images/layout/tick.gif) Partial if landfill gas extracted |
![No](/images/layout/cross.gif) No fertiliser outputs |
![No](/images/layout/cross.gif) Lost in leachate |
![No](/images/layout/cross.gif) Not possible |
![No](/images/layout/cross.gif) Energy required |
![No](/images/layout/cross.gif) Damage to ozone layer, also leachate problems |
![No](/images/layout/cross.gif) None |
![Yes](/images/layout/tick.gif) Incomplete pathogen kill |
![No](/images/layout/cross.gif) Lost to atmosphere |
![No](/images/layout/cross.gif) Not possible |
![No](/images/layout/cross.gif) Fertiliser loss negates any energy gain |
![No](/images/layout/cross.gif) Toxic ash |
![Yes](/images/layout/tick.gif) Some but Energy wasted |
![Yes](/images/layout/tick.gif) Some P&K output, but N destroyed |
![No](/images/layout/cross.gif) Burnt off |
![No](/images/layout/cross.gif) Secondary waste |
![No](/images/layout/cross.gif) Fertiliser loss negates any energy gain |
![No](/images/layout/cross.gif) Toxic ash, emmissions regulated |
![Yes](/images/layout/tick.gif) Some but Energy wasted |
![Yes](/images/layout/tick.gif) Some P&K output, but N destroyed |
![No](/images/layout/cross.gif) Burnt off |
![No](/images/layout/cross.gif) Secondary waste |
![No](/images/layout/cross.gif) Fertiliser loss reduces energy gain |
![Yes](/images/layout/tick.gif) Pollutants locked in slag |
![Yes](/images/layout/tick.gif) Some but Energy wasted |
![Yes](/images/layout/tick.gif) Some P&K output, but N destroyed |
![No](/images/layout/cross.gif) Burnt off |
![No](/images/layout/cross.gif) Controlled not recovered |
![Yes](/images/layout/tick.gif) Carbon neutral |
![Yes](/images/layout/tick.gif) Total recovery of energy as CH4 CO2 & fertiliser |
![Yes](/images/layout/tick.gif) Maximum overall energy |
![Yes](/images/layout/tick.gif) Clean NPK fertiliser and trace elements |
![Yes](/images/layout/tick.gif) 100% |
![Yes](/images/layout/tick.gif) Heavy metals can be recovered from digestate |
Anaerobic digestion is the only system for dealing with organic waste which is sustainable, recovers the maximum energy, is a completely closed system with no emissions to air or land, which retains the fertiliser and water content, and facilitates the recovery of heavy metals.