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Disposal – Permanently containing hazardous wastes. The most common type of disposal facility is a landfill, where hazardous wastes are disposed of in carefully constructed units designed to protect groundwater and surface water resources.
Food waste is the most common material found in U.S. landfills. It is the single largest component of the municipal waste we discard, accounting for more than 20 percent of the material arriving at landfills and incinerators. We currently recycle less than 3% of food waste.
There are many methods of leachate treatment [5] such as: Aerobic Biological Treatment such as aerated lagoons and activated sludge. Anaerobic Biological Treatment such as anaerobic lagoons, reactors. Physiochemical treatement such as air stripping, pH adjustment, chemical precipitation, oxidation, and reduction.
Chemicals added to plastics are absorbed by human bodies. … Plastic buried deep in landfills can leach harmful chemicals that spread into groundwater. Around 4 percent of world oil production is used as a feedstock to make plastics, and a similar amount is consumed as energy in the process.
The total amount of plastics combusted in MSW in 2018 was 5.6 million tons. This was 16.3 percent of all MSW combusted with energy recovery that year. In 2018, landfills received 27 million tons of plastic. This was 18.5 percent of all MSW landfilled.
Researchers estimate that more than 8.3 billion tonnes of plastic has been produced since the early 1950s. About 60% of that plastic has ended up in either a landfill or the natural environment.
The water that gets into landfill cells picks up contaminants from the waste and becomes “leachate.” What’s in the leachate depends on what’s in the landfill, but some chemicals can be counted on, such as volatile organic compounds, chloride, nitrogen, solvents, phenols, and heavy metals.
Impacts Biodiversity
The creation of landfill sites requires wild areas to be cleared, leading to habitat loss and degradation. … This can become toxic and thus contaminate nearby streams, ponds and lakes, damaging the habitat of many different organisms.
Mice, voles, and other small mammals pick from the trash and nest in the landfill’s periphery, while raccoons, coyotes, and dogs — even baboons and bears in areas with such creatures — scavenge the top. Crows, starlings, and gulls flock to landfill en masse, and are in turn sometimes scavenged by fiercer birds of prey.
Soil is needed to cover fresh waste every day, and once the landfill has reached its capacity, the waste is covered with more clay and another plastic sheet. Since this waste is simply “stored” as opposed to broken down, it releases methane gas, the greenhouse gas that contributes to climate change.
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