Chatting with a friend of this matter and browsing the available material of the Vetiver Network, I bumped into this PDF document that sums up the state of the art of the research and of the realizations so far existing in Australia, Thailand, China, etc.
Leachate is the "structural evil" tightly connected with the old practice of burying the garbage in landfills. It drags with it all the worst of our lifestyle: acids, hydrocarbs, solvants, ecc. It is formed in the rotten heart of landfills and when rains fill up the containment, it spills into our dishes as steaks, vegetables, pasta, ecc.
Many studies have been carried out on the theme, but structural prevention implies very high costs, not to talk about those landfills which are not authorized, uncontrolled put in place by people without a conscience..
If prevention is costly, the cure isn't.....
Leachate is the "structural evil" tightly connected with the old practice of burying the garbage in landfills. It drags with it all the worst of our lifestyle: acids, hydrocarbs, solvants, ecc. It is formed in the rotten heart of landfills and when rains fill up the containment, it spills into our dishes as steaks, vegetables, pasta, ecc.
Many studies have been carried out on the theme, but structural prevention implies very high costs, not to talk about those landfills which are not authorized, uncontrolled put in place by people without a conscience..
If prevention is costly, the cure isn't.....
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2 commenti:
Finally I managed to enable the comments on this blog....
In the Italian version I received a comment from Nicola who asked me if the biomasses used for leachate absorbtion where suitable to be processed with the pyrolysys method for energy production since the high temperatures reached...
follows my answer..
In the second chamber of a Pyrolitic converter, temperatures reached are over 1000 ° C this
causes metals to melt, these are then precipitated with the ashes and quickly cooled. This process makes them inert. This is not really my field, then a good technical explanation can
be found here: http://www.europirol.net/
I believe though that the quick pyrolysis process, different from pyrolisis (http://smarteconomy.
typepad.com/smart_economy/
2008/04/a-simple-the-fi.html )and
capable of producing a fuel oil similar to biodiesel, does not reach these temperatures and
thus will not allow the use of heavy metal contaminated biomasses, in the first case we deal
with special waste of any kind to produce energy from heat; in the second, we use biomasses derived from local productions to produce second-generation biofuels. In this
case we will have much smaller plants, less costly also in terms of energy needs. I imagine
that these will be best suited to small groups of farms or small communities which won't
allow the construction of large industrial structures with an unbearable environmental
impact in their neighbourhood.
Tomorrow (the technology needs fine tuning and will enter the market within a decade or slightly less) probably agriculture will become for biodiesel what solar is today for energy production to the grid: an individual matter.
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