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The amount of energy saved through recycling depends upon the material being recycled and the type of energy accounting that is used. Correct accounting for this saved energy can be accomplished with life-cycle analysis using real energy values, and in addition, exergy, which is a measure of how much useful energy can be used. In general, it ...
Aluminium is an infinitely recyclable material, and it takes up to 95 percent less energy to recycle it than to produce primary aluminium, which also limits emissions, including greenhouse gases. Today, about 75 percent of all aluminium produced in history, nearly a billion tons, is still in use.
Recycling aluminium saves 96% of the energy cost of processing new aluminium, it also helps divert significant amounts of waste from landfills. [11] This is because the temperature necessary for melting recycled, nearly pure, aluminium is 600 °C, while to extract mined aluminium from its ore requires 900 °C.
Incineration, the combustion of organic material such as waste with energy recovery, is the most common WtE implementation. All new WtE plants in OECD countries incinerating waste (residual MSW, commercial, industrial or RDF) must meet strict emission standards, including those on nitrogen oxides (NO x), sulphur dioxide (SO 2), heavy metals and dioxins.
The steel industry saves enough energy to power about 18 million households for a year, on a yearly basis. [6] Recycling metal also uses about 74 percent less energy than making metal. Thus, recyclers of end-of-life vehicles save an estimated 85 million barrels of oil annually that would have been used in the manufacturing of other parts. [3]
Recycling one glass bottle can save enough energy to power a computer for 25 minutes. [5] In fact for every 10% of cullet added to the production of a new bottle, energy usage goes down by 3-4%. [2] Recycling one ton of glass can save approximately 42 kWh of energy which translates to 7.5 pounds of air pollutants not being released into the ...
In addition, recycling anode materials (primarily graphite) could significantly increase the recovery of lithium from spent batteries, since much of the lithium "lost" during battery use ends up in the anode. [23] Energy saving and effective recycling solutions for lithium-ion batteries can reduce the carbon footprint of the production of ...
Assuming that virgin PET will be used regardless of the existence of recycling: Energy 70 → 15 MJ/kg; Water 9.9 → 10.3 L/kg (this increase due to the intense washing required for mechanical recycle) Greenhouse gas emissions 2.8 → 0.9 kgCO 2 /kg