Landfill diversion

Waste diversion or landfill diversion is the process of diverting waste from landfills. The success of landfill diversion can be measured by comparison of the size of the landfill from one year to the next. If the landfill grows minimally or remains the same, then policies covering landfill diversion are successful. For example, currently in the United States there are 3000 landfills.[1] A measure of the success of landfill diversion would be if that number remains the same or is reduced. In 2009, it was recorded that the national average of landfill diversion in the United States was 33.8%, while San Francisco had implemented the most effective policies and had recorded a landfill diversion rate of 77%.[2] By diverting landfills we can preserve our natural resources.[3]

Waste Diversion

Waste diversion is the process of diverting waste from landfills through recycling and source reduction activities. This can be calculated in different ways. As a global community, we can measure the size and number of landfills from one year to the next. If the landfills have shrunk or decreased in number, then it can be gathered that we are successfully implementing a waste diversion plan. If landfills have increased in number, then we are not doing enough to combat the growing population and growing waste we produce. On a smaller scale, we can track our week to week, or even day to day, waste diversion rate.

Types of Landfill Diversion

Recycling

Landfill diversion can occur through recycling. Recycling refers to taking used materials and creating new products in order to prevent the disposal of these products in landfills. Recycling material can include glass, paper, metal, plastic, textiles, and electronics.

Thermal Treatment

Another method of landfill diversion is thermal treatment (such as Incineration). Approximately sixteen percent (16%) of waste is incinerated yearly in the United States.[4]. Incineration, however, can lead to other environmental issues that may have positive or negative results.

Biological Treatments

In addition to reusing materials waste products can go through biological treatment. There are two types of biological treatments anaerobic digestion or composting. Simply stated, biological treatment is the breaking down of material through the action of micro-organisms. Materials are broken down to carbon dioxide, water and biomass. Biomass consists of wood, crops, yard and animal waste. Biomass is considered a renewable energy because more can be grown in a short amount of time. Biomass contributes to roughly four percent of our energy. Biomass energy although its burned, does not pollute the air as much as fossil fuels. Some materials easily break down, others do not. The environment in which the material is placed determines the speed of breakdown.

Waste to Energy

Other options for diversion are composting and waste-to-energy: converting primary waste into various types of energy such as heat or electricity.

Types of Landfills

Open Dump

An open dump is an area where unwanted waste is disposed of with no regulations or restrictions; they often produce adverse effects on the environment. The Resources Conservation and Recovery Act of 1976 prohibited open dumping[5], therefore making it illegal in many states.

Sanitary Landfill

A sanitary landfill is where waste is disposed of in thin layers little by little; each layer is covered and compacted with soil to prevent foul odors and wind blown litter.[6] This method prevents the creation of safety and public health hazards; this landfill has four requirements before it is built. The first requirement is that it must have absolute leachate security; the bottom of the landfill can be lined, synthetically or with soil, to prevent water contamination. Secondly, there must be formal engineering preparations and plannings in order to ensure the success of the landfill. Thirdly, permanent supervision must be present in all stages of the landfill also to ensure success and sustainability. Lastly, the placement and compacting of waste must be planned to prevent pest and vermin infestations.[7]

Secure Landfill

A secure landfill is where hazardous waste is deposited since it requires a much more stringent regulation than municipal waste. The landfill must have at least two impermeable liners as well as a system for leachate collection to prevent any water contamination. In addition to this, the landfill must also have a groundwater monitoring system in case there is a leak; the wells can be pumped to remove the contaminated water for treatment[8].

Deep-well injection

Deep-well injection is a form of disposing of liquid hazardous waste. The liquid waste is pumped into porous limestone or sandstone through a steel casing, and high pressure is applied making the waste permanently stored in the pores and fissures of the rocks. The limestone or sandstone used for injection must be located beneath an impermeable layer of clay or rock at least 0.5 mile below the surface[9]. This option generally does not require pre-treatment of the waste and is one of the more inexpensive options, however it poses a risk of hazardous waste leakage.



Legislation

United States of America

Maryland

The Maryland Department of the Environment (MDE) promotes the idea of waste diversion by partnering with Maryland's jurisdictions as well as the public and private sectors. All counties and Baltimore City are required to recycle 15% of waste generated (populations under 150,000) or 20% (populations over 150,000) due to The Maryland Recycling Act (MRA); the state government is also required to recycle at least 20% of their solid waste.[10]


Europe

European waste legislation focuses upon the diversion of biodegradable waste from landfill, due to its potential to add to the effects of climate change.[11]


Waste Diversion Rate

Calculating waste diversion rates is an important tool for households and especially businesses to use. It is a KPI in indicating a successful recycling program.[12] By tracking progress weekly, changes can be made to improve week to week. A simple formula is used to calculate the waste diversion rate, as follows:

(Weight of Recycling / (Weight of Recycling + Weight of Garbage)) X 100[13]

Waste should be labeled with the name of the area in which they were received. For businesses, this will be helpful in implementing programs; what may work for one part of the company may not work for another. The goal is to calculate a number as close to one hundred as possible. This would imply that one hundred percent of your waste is recycled. If a lower number is calculated, changes are required to improve the score. When a need to change the recycling plan is recognized, you must effectively communicate the plan to all members involved to make sure it is implemented in full. After the plan is implemented, try measuring the waste diversion rate again. Measure the changes to see if the new plan has produced clear benefits.

Waste Diversion Validation

The UL is a global independent safety science company which is working to find and improve current technologies and the public use of these things. They work to innovate the usage to promote a world where these luxuries and a healthy environment can co-inhabit the planet.[14] They are three different levels of validations which the UL uses to honor the companies who manage their waste in environmentally healthy ways. Facilities are recognized as "Zero Waste" if they can consistently measure at a waste diversion rate of 100 percent.[15] Facilities which are granted "Virtually Zero," maintain a waste diversion rate of 98 percent or higher.[16] If facilities can manage to keep a waste diversion rate of 80 percent or higher, they are recognized as operating with landfill waste diversion.[17]

Methods of Achieving Zero or Virtually Zero

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See also

References

  1. ↑ "Wastes | Browse EPA Topics | US EPA". Epa.gov. June 28, 2006. Retrieved February 19, 2012.
  2. ↑ "Additional Waste & Recycling Indicators". Green Dashboard. Government of the District of Columbia. Retrieved 29 September 2015.
  3. ↑ http://greendashboard.dc.gov/Waste/WasteDivertedFromLandfills
  4. ↑ "Statistics". Zerowasteamerica.org. Retrieved February 19, 2012.
  5. ↑ Slimak, Karen (Dec 1978). "Landfill Disposal Systems" (PDF). Environmental Health Perspectives. 27: 309-316.
  6. ↑ "Sanitary Landfill". Encyclopedia Britannica. Encyclopedia Britannica.
  7. ↑ "Solid Waste". web.mit.edu. Massachusetts Institute of Technology.
  8. ↑ Nathanson, Jerry. "Hazardouse-waste management". Britannica. Retrieved 28 November 2016.
  9. ↑ Nathanson, Jerry. "Hazardouse-waste management". Britannica. Retrieved 28 November 2016.
  10. ↑ "Waste Diversion in Maryland". The Department of the Environment. Retrieved 28 November 2016.
  11. ↑ http://www.recyclecddebris.com/rCDd/Resources/Documents/CSIEurope01.pdf
  12. ↑ "How to Measure Your Waste Diversion Rate - CleanRiver". CleanRiver. 2014-03-31. Retrieved 2016-10-17.
  13. ↑ "How to Measure Your Waste Diversion Rate - CleanRiver". CleanRiver. 2014-03-31. Retrieved 2016-10-17.
  14. ↑ "About UL | UL". www.ul.com. Retrieved 2016-10-17.
  15. ↑ "Landfill Waste Diversion Validation | Services". services.ul.com. Retrieved 2016-10-17.
  16. ↑ "Landfill Waste Diversion Validation | Services". services.ul.com. Retrieved 2016-10-17.
  17. ↑ "Landfill Waste Diversion Validation | Services". services.ul.com. Retrieved 2016-10-17.


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