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May 3, 2017 at 6:55 comment added mart thanks, I'll have a look - also reminder to self that I need to dig up more numbers for my answer ...
May 2, 2017 at 16:41 comment added Uli Alskelung Von Hornbol I became curious and did another round of Googling and came across this: link.springer.com/article/10.1007/s40518-014-0018-1 This analysis seems to suggest that incineration is just as efficient if not more efficient when looking at combined heat and power. I guess the only reason to have digesters then would be if one really wants to produce sustainable fuel for airplanes.
Apr 15, 2017 at 11:42 comment added Uli Alskelung Von Hornbol Were you able to find anything?
Feb 15, 2017 at 8:29 comment added mart I'll see what I find.
Feb 14, 2017 at 20:31 comment added Uli Alskelung Von Hornbol I appreciate your answer @mart, do you have any references? And do you have any energy budgets for these two types of approaches, even back-of-the-envelope? E.g. 1 kg food waste contains 2.5 MJ of energy (by burning) and 2 MJ is required to boil off the water so every 1kg of food can be turned into 0.5 MJ of heat. For biogas maybe the gas produced from 1 kg of food contains 0.7 MJ if all converted to heat, but can also be used in engines (at around 25% efficiency) to produce kinetic energy or electricity.
Feb 13, 2017 at 15:21 history edited LShaver CC BY-SA 3.0
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Feb 13, 2017 at 10:06 history answered mart CC BY-SA 3.0