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The Problems with Land Fills (Landfills) - The Inside Structure of a Landfill

Nobody, or nobody, likes a land fill.  But, that does not alter the indisputable fact that Land fill is one of the most widely used techniques of waste disposal of civil solid waste ( MSW ) and commercial business and general commercial waste ( C&I Waste ) around the globe.  Even when a council recycles a lot there may still be a third of the waste going to a land fill.

As well as that more and more are being thrown up as society makes more trash.

After being land filled, the refuse decomposes through a sequence of combined physico-chemical and biological processes, which may take a period of more than a century and a half.

Some waste in these nations never even gets sent to landfills any more.  For instance, waste from electric and electronic hardware, white goods ( e.g, washing machines, fridges ) and hazardous waste ( e.g, batteries, drugs, fluorescent tube lighting ) mustn’t be thrown in the bin, but get left at the numerous civic amenity centres around the country for recycling and disposal. 

Land fill fires are not unusual on the poorly controlled landfills and yet more pollution happens when rubbish heap burning produces toxic smoke as they burn plastic materials.  Such fires are rare in the united states, Europe and other more wealthy countries.  Land fill desires miles better control in most developing states and it’s not dear control the land fills better, when compared with he disease and suffering caused by bad land fills.

Landfills are a bit like bathtubs.  Like bathtubs, they leak two ways : out the bottom or ott.  To avoid this the leachate must be removed before it builds up pressure.  So, leachate is removed from the bottom layer of the Land fill and put into storage tanks.

The leachate is then pumped back to the land fill, allowing it to flow over the waste continually.  It filters thru the land fill, picking up impurities as it travels.  The bottom layer of the dump rests upon a land fill liner.  The liner regularly has several layers.  The top, or primary, liner might be as an example, a composite section with 60-mil high-density polyethylene ( HDPE ) and a bentonite subliner. 

Leachate is produced by a mix of liquids from waste material, rainwater and other liquids that are produced during the decomposition of waste.  It may contain contaminates that would pollute water supplies if allowed to enter the underground water in the rocks below.

Depending on traits of the Land fill and the wastes it contains, the leachate may be relatively safe or very toxic. 

To make sure that a land fill doesn’t pollute the groundwater below it, groundwater monitoring wells are installed thru each site to ensure that Land fill operations are not badly effecting underground water quality. 

Usually, each one of the wells is sampled on a once a month basis, with the results sent to the Environmental Protection (EPA) and Water Resources Board.  Groundwater monitoring stations consistently test for land fill leakage, infrequently for as long as fifty years after Land fill closure.  That is needed since there’s little oxygen and moisture in Land fills, garbage does not break down extremely quickly.

Additionally, a Land fill gas system will be installed to gather gas through wells and treat the gas by burning in enclosed flame flares or by other licensed strategies such as converting the gas to electricity. 

Methane has twenty-one times the global warming potential of CO2, therefore in the short term and in the case of Controlled Landfill Sites, it is better to have CO2 going into the atmosphere than methane.  Land fill gases travel freely for great distances into the environment.  Methane burns really easily and regularly is used as natural gas for cooking and heating.  It is lighter than air and collects at the pinnacle of enclosed spaces.
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