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Green Building Bible, Fourth Edition
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Renewable Energy: What to do with GROT

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  1.  
    • CommentAuthorTriassic
    • CommentTimeMay 28th 2013 edited
     
    Norway possesses major unexploited energy resources of waste wood in the form of the branches and tops – known in their Norwegian acronym as GROT. There is an abundance of waste wood to see when we walk in the forest after the lumberjacks have been there. When the logging machinery moves on, what it usually leaves behind are piles of branches and tops.

    Skreiberg is leading a team at Norway’s SINTEF Energy Research where samples of the logging waste regularly arrive to be transformed into fuel.

    In the raw form in which the biomass arrives at the laboratory, it is regarded as a problematic and therefore low-value fuel.

    But when the scientists and technicians have finished processing it, they are left with a valuable source of heat – ready for use in industrial heating furnaces that are currently fuelled with wood pellets or chips, and for Norway’s domestic pellet stoves.

    http://newenergyandfuel.com/http:/newenergyandfuel/com/2013/05/23/making-waste-wood-into-fuel/?utm_source=feedburner&utm_medium=feed&utm_campaign=Feed%3A+NewEnergyAndFuel+%28New+Energy+and+Fuel%29&utm_content=Google+UK

    I have a shreader, all I need now is a reactor!
    •  
      CommentAuthorfostertom
    • CommentTimeMay 28th 2013
     
    In managed broadleaf forests, already too much of the GROT is removed, when it ought to be left as essential natural habitat from wildlife. Maybe it doesn't matter in coniferous forests, where the forest floor is pretty sterile anyway.
  3.  
    Posted By: fostertomIn managed broadleaf forests, already too much of the GROT is removed, when it ought to be left as essential natural habitat from wildlife. Maybe it doesn't matter in coniferous forests, where the forest floor is pretty sterile anyway.


    That point is mentioned at the very end of that piece:

    “If large-scale harvesting of GROT gets under way in Norway, this will mean that nutrients are also being removed from forest soil. In that case, we ought to look at the possibility of bringing its ash back to the forest. But at present, that is not permitted in Norway,” he said.


    Probably much better just to leave it where it is...
    • CommentAuthorFred56
    • CommentTimeMay 28th 2013
     
    Carbon fluxes. If it stays there on the ground some will be released as emissions (but no particulates) but some adds to soil carbon. We really need it in the soil because the action of harvesting the trees causes a sharp spike is carbon emissions through loss of soil carbon. Regrowing the forest will eventually capture it again but it will take about 150 years all in. Hardly a smart idea when we want a quick reduction in emissions.
    R4 today was taking about the USA harvesting natural forests for fuel. Utterly stupid. Carbon neutral my ass. Guess who's buying it.
    •  
      CommentAuthorSteamyTea
    • CommentTimeMay 28th 2013
     
    Posted By: Fred56R4 today was taking about the USA harvesting natural forests for fuel. Utterly stupid. Carbon neutral my ass. Guess who's buying it.
    Missed that, what was it called?
    •  
      CommentAuthorfostertom
    • CommentTimeMay 29th 2013
     
    GROT left on the forest floor isn't just for carbon balance - it's vital habitat for diverse wildlife - insects mainly.
    • CommentAuthorFred56
    • CommentTimeMay 29th 2013
     
    <blockquote><cite>Posted By: SteamyTea</cite><blockquote><cite>Posted By: Fred56</cite>R4 today was taking about the USA harvesting natural forests for fuel. Utterly stupid. Carbon neutral my ass. Guess who's buying it.</blockquote>Missed that, what was it called?</blockquote>

    It was on PM at 40mins in.
    • CommentAuthormw116
    • CommentTimeMay 29th 2013
     
    It was also covered on the Today programme this morning - around 7:40. Apparently we're transporting it across the ocean so Drax can stay open...
    • CommentAuthorTriassic
    • CommentTimeMay 29th 2013
     
    Why not burn British coal and use technology to reduce emmissions? Or is it all about cost?
    •  
      CommentAuthorSteamyTea
    • CommentTimeMay 29th 2013
     
    I think the mine is still burning. Ans Scottish Coal is no more.
    Yes it is all about cost, if we invested say £10bn in clean coal technology, that would be £10bn less that we could not invest in energy reduction, or something else. Be cheaper to replace the old coals with gas until be have a cheaper alternative, but only if we are willing to spend some extra money on out domestic energy bills, which we are not.

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