Landfill disposal, by far the most common of the methods of waste disposal
until recently, has been the
dumping of the waste in landfills: a sort of huge pits dug into the
land and then covered up after the pit
fills up. The process is, of course, then repeated at another location
again and again.
However, several factors militate against the continued use of
landfill as a means of waste disposal, particularly putrescible waste
of biotic nature.
Specifically, the disposal of food-wastes by landfill has been determined
to result in the diffusive dispersion of toxins. Generally as the
food-wastes are decomposed by both aerobic and anaerobic bacteria in
the landfills the results in some stage are high content of acids.
These acids generally dissolve, as well as react with, the metal
components in the landfills often producing toxic chemicals
that ultimately diffuse into the ground-water system.
Furthermore, during decomposition, the biodegradable waste dumps in
landfills also undergo reactions that generate
GHG emission, that
continues for a long time because of the large reservoir of such
waste accumulated in the landfill.
Besides, these landfills, by and large, have
become huge in size and continue to use up more land-space.
In addition to the expansive
exclusion of more land for the purposes of landfill use, there
is also the issue of leaching of landfills. The leaching of
landfills presents also leads to further exclusion of land that
would otherwise be available for human habitation; and the exclusion
comes about from two different reasoning: The leachate in fact
causes pollution of the neighboring lands of landfills and so makes
those lands un-inhabitable by humans in the near future;
besides the pollution, the
land so polluted, however, also gets to be granted
reclassification and as such under certain
governmental laws becomes excluded from human use.
there is the necessary motivation to transition from the use of
landfills as a means of waste disposal to some other form of disposal.
The objects of such transition are varied and drive Sustainability
as delineated presently.
First there is
the need to adopt an approach
that generally enables environmental pollution control and hence would support the prevention of the poisoning of the ground
necessity of preventing GHG emission from any source including
the adverse and huge scope of
derivative impact of GHG
there is the need for
elimination of the unsustainable continual use of extra land space
-usable for human habitation - in addition to the mass excluded for
the landfill just for treating waste already disposed of in a given
landfill and hence the consequential prevention of the usage exclusion of
extra land due
to leachate of the landfills. After all, for a growing world
population, the continual exclusion of portions of land for
landfills and derivative matters, the need for land for landfills
will sooner or latter begin to conflict with the habitation needs of
humanity for land space - quite similar to the case of growing
cash-crops for biofuel as reflected by analysis.
These factors have also contributed to the many governmental
regulations at different parts of the world effectively banning the
future use of landfill for waste disposal.
While the banning of the prospective use of landfill is a reasoned and
significant measure towards alleviating the consequential result of
the underlying factors, the residual effect of exiting landfill
persists and endures to come about, and as such there exists
the need to develop an approach to remediating these future
consequences of the use of landfills.
Quite rationally, then an
approach to addressing the issue of landfill residual effects
prevention would be
Landfills Reclamation Pollution Control Engineering, which will
the case of actual pre-leachate treatment of the wastes in landfills
using advanced bioengineering technologies, that extract the
biodegradable pollutants while allowing for the permanent sealing
off of the nonbiodegradable wastes.
Landfills Reclamation Pollution Control Engineering tasks in this
case is worth serving as a guide for the objects of the endeavour.
Recognizing that generally the biodegradable waste, specifically
those wastes of biotic nature generally putrefies and become sort of
thick particulate mash. So then it seems reasonable to conjecture
that the waste can in fact be "washed" in some sense such that the
particulate mash gets to be extracted from the rest of the waste by
washing the non-biodegradables.
approach could be the digging up of the wastes and then washing the
mush by some process and returning the rest back to the landfill
space and then processing the wash water or putrescibles particulates
mixture. An alternative approach would be to design a set of inlet
and outlet pipes, through which "landfill washing" [or washing]
fluid is pumped in and then extracted out, respectively. Of the two
approach, the approach chosen to be adopted necessarily will depend
on the landfill design and the nature of the wastes that had been
dumped in the target landfill, the viscosity of the pollution
particulate mash, the rate of mixability of the mash with the
washing fluid, the tortuosity of the waste in the landfill, and
other factors impacting the flow characteristics of the mixture of
mash and washing fluid.
the specific approach to accomplishing the "landfill washing" is
entirely design-specific. However, the residents of the neighborhood
of the landfills may also impact the landfill washing approach
adopted as well as the engineering design of the process equipment
used for the washing.
important is also the size of available unoccupied land surrounding
the landfill on which will be situated the Landfill Washing Process
So then, in
contemplating the design of such Landfill washing Process Plant, an
salient feature is that the plant must be movable and be removed
from the locale after the washing of the landfill, because over some
finite time interval the washing of the landfill will be completed
given that the landfill is not of infinite dimension. Also it must
operate such that the process does not cause undue
neighborhood smell. Further, the
washing fluid, if ordinary water, then will have to be produced locally, say,
for the post leachate treatment, the Landfills Reclamation Pollution
Control Engineering may invariably be expanded to also include a
sub-mechanism for the restoration of the leachate-polluted
surrounding lands; but, the cleaning of the leachate polluted lands
may be somewhat more involved that the cleaning of the landfill
itself. This added difficulty derives from the necessary
consideration of the earth particles, such as sand, filth, soil, and
other microscopic particles all of which will have to be carefully
treated and returned to the land.
Notwithstanding the apparent difficulty, with some limited research
regarding previous approaches adopted for treatment of polluted
earth as the specific leachate-polluted
lands, comes to mind the interesting approach, of many years ago,
that was adopted in NJ for
the cleaning up and land recovery of polluted lands that obtained caused by the leakage of gas tanks
of gas stations. In this particular situation the
polluted earth was dug up, chemically cleaned and then returned back. Curious if anyone has considered
this approach for address the landfill leachate problem. In essence,
this approach may be adopted and modified for use in the recovery of
the leachate-polluted lands surrounding landfills.
Adopting the gas-leak pollution
control approach as a foundation for cleaning the leachate polluted
lands around landfill, suggests that the polluted lands around
landfills also be dug up. "washed" somehow and then be returned to
the earth. while the leachate polluted land must be first dug-up,
again the approach to treating the pollutants is design specific,
and the approach adopted will depend on whether the end-result of
the operation should produce a dry mass or a wet mass of land.
Irrespective of the approaches or
combination of approaches ultimately adopted towards the reclamation
of a landfill, the significant aspect of the discourse, here is that
the landfills can be washed, at least conceptually, and as such
efforts made towards the accomplishment of such objects may result
in environmental cleaning that should further the Sustainability of
the activities of human life.