| The patented process consists essentially in the treatment
of any kind of refuses that you can find in the SUR and/or in the sludge,
by means of a polymer additive plus a specific catalyst that, interacting
with perishable components, destroys its micro-bacterial flora making them
inert. Besides, adding CaCO3
(calcium carbonate) or inert drawn by the demolition during the transformation
of the product, we obtain a material with a good fire resistance. |
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| The process of transformation permits to modify the refuse
disposal system of the SUR and/or sludge, which are now placed inside big
basins drawn in areas destined to become landfills
that, as well known, produce heavy environmental
impacts; and even if it is possible to minimize the ecological unbalancements,
to do so highly expensive and anyway insufficient cultivation techniques
are needed. The waterproofing does not guarantee
completely a perfect hermetic closure, allowing the percolation and
the diffusion of both anaerobic fermentation products and toxic substances
present in the initial refuses in the deep stratums. |
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| These aspects still did not find suitable solutions, especially
for what concerns the prevision and the prevention of the effects derived
from the use of the current SUR landfills (the effects are environmental
degradation, atmospheric and water-stratum pollution, miasmas, rodents,
etc). These discomforts are
particular felt by the population that demands the removal of the landfills
from inhabited areas, establishments, parks, essentially from any place
connected with man life. |
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| Many are the costs derived from the service and, conversely,
also from the consumer's costs; just think about the acquisition of the
areas, the structural works, the management of the parking lot. |
| |
| The driver's discomforts must not be neglected too; these
take place during the transport of the SUR, from the gathering to the transfer
places, up to the final landfills (about
100.000 daily transfers in the big metropolitan areas). Considering
the daily mass of SUR approximately produced in Italy, we reach astonishing
numbers. In matter of fact with the current average of l daily kg per capita,
for a population of 50.000.000 inhabitants, we arrive at a daily average
waste production of 50.000 daily/tons,
that is equal to a compacted volume of about 770.000
daily/mc, being Vc = to about l daily/mc every 65 inhabitants. Considering
these notions in volumetric terms, for an average compacted waste height
of 5 m, it can be retainable to think that every day a surface of
150.000 square meters is covered,
while the hypothetic recovery of the areas will
be valuable in tens of years. |
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| It has been thought, in these last years, to reintroduce
the incinerator that, if matched with a heat recovery, is called
"thermo-destructor"; but it also produces
eco-system unbalancements, either for the produce of high quantities
of carbon dioxide and enormous consumption of oxygen or for the production
of dioxin, caused by the presence of plastic materials. Besides, sludge
and solid urban refuses produce, burning themselves, a high quantity of
sulfur dioxide that transforms itself, with the steams of combustion, into
sulfuric acid increasing the acid rains. The emission problem remains anyway
remarkable and difficult to manage, while the arrangement of the
ashes demands suitable landfills, being very
dangerous for their volatility and toxicity. This
kind of process is distinguished by enormous costs and pollution caused
by the incinerating activity itself. |
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