This article is about material waste. For the medical condition, see Wasting. For other uses, see Waste (disambiguation).
"Refuse" redirects here. For other meanings of this word, see Refusal.
"Rubbish" redirects here. For other uses, see Rubbish (disambiguation).
Solid waste after being shredded to a uniform size
An art installation created with plastic bottles and other non-biodegradable waste
Waste (or wastes) are unwanted or unusable materials. Waste is any substance which is discarded after primary use, or is worthless, defective and of no use. A by-product by contrast is a joint product of relatively minor economic value. A waste product may become a by-product, joint product or resource through an invention that raises a waste product's value above zero.
Examples include municipal solid waste (household trash/refuse), hazardous waste, wastewater (such as sewage, which contains bodily wastes (feces and urine) and surface runoff), radioactive waste, and others.
Contents
1Definitions
1.1United Nations Environment Program
1.2United Nations Statistics Division
1.3European Union
2Types
3Reporting
4Costs
4.1Environmental costs
4.2Social costs
4.3Economic costs
5Resource recovery
6Energy recovery
7Education and awareness
8Gallery
9See also
10References
11External links
Definitions
United Nations Environment Program
According to the Basel Convention on the Control of Transboundary Movements of Hazardous Wastes and Their Disposal of 1989, Art. 2(1), "'Wastes' are substance or objects, which are disposed of or are intended to be disposed of or are required to be disposed of by the provisions of national law".[1]
United Nations Statistics Division
The UNSD Glossary of Environment Statistics[2] describes waste as "materials that are not prime products (that is, products produced for the market) for which the generator has no further use in terms of his/her own purposes of production, transformation or consumption, and of which he/she wants to dispose. Wastes may be generated during the extraction of raw materials, the processing of raw materials into intermediate and final products, the consumption of final products, and other human activities. Residuals recycled or reused at the place of generation are excluded."
European Union
Under the Waste Framework Directive 2008/98/EC, Art. 3(1), the European Union defines waste as "an object the holder discards, intends to discard or is required to discard."[3] For a more structural description of the Waste Directive, see the European Commission's summary.
Types
Main article: List of waste types
There are many waste types defined by modern systems of waste management, notably including:
Municipal waste includes household waste, commercial waste, and demolition waste
Hazardous waste includes industrial waste
Biomedical waste includes clinical waste
Special hazardous waste includes radioactive waste, explosive waste, and electronic waste (e-waste)
Reporting
Waste generation, measured in kilograms per person per day.
There are many issues that surround reporting waste. It is most commonly measured by size or weight, and there is a stark difference between the two. For example, organic waste is much heavier when it is wet, and plastic or glass bottles can have different weights but be the same size.[4] On a global scale it is difficult to report waste because countries have different definitions of waste and what falls into waste categories, as well as different ways of reporting. Based on incomplete reports from its parties, the Basel Convention estimated 338 million tonnes of waste was generated in 2001.[5] For the same year, OECD estimated 4 billion tonnes from its member countries.[6] Despite these inconsistencies, waste reporting is still useful on a small and large scale to determine key causes and locations, and to find ways of preventing, minimizing, recovering, treating, and disposing waste.
Costs
Environmental costs
Inappropriately managed waste can attract rodents and insects, which can harbour gastrointestinal parasites, yellow fever, worms, the plague and other conditions for humans, and exposure to hazardous wastes, particularly when they are burned, can cause various other diseases including cancers. Toxic waste materials can contaminate surface water, groundwater, soil, and air which causes more problems for humans, other species, and ecosystems.[7] Waste treatment and disposal produces significant green house gas (GHG) emissions, notably methane, which are contributing significantly to global warming.[5]
Social costs
Waste management is a significant environmental justice issue. Many of the environmental burdens cited above are more often borne by marginalized groups, such as racial minorities, women, and residents of developing nations. NIMBY (not in my back yard) is the opposition of residents to a proposal for a new development because it is close to them.[8] However, the need for expansion and siting of waste treatment and disposal facilities is increasing worldwide. There is now a growing market in the transboundary movement of waste, and although most waste that flows between countries goes between developed nations, a significant amount of waste is moved from developed to developing nations.[9]
Economic costs
The economic costs of managing waste are high, and are often paid for by municipal governments;[10] money can often be saved with more efficiently designed collection routes, modifying vehicles, and with public education. Environmental policies such as pay as you throw can reduce the cost of management and reduce waste quantities. Waste recovery (that is, recycling, reuse) can curb economic costs because it avoids extracting raw materials and often cuts transportation costs. "Economic assessment of municipal waste management systems – case studies using a combination of life-cycle assessment (LCA) and life-cycle costing (LCC)".[11] The location of waste treatment and disposal facilities often reduces property values due to noise, dust, pollution, unsightliness, and negative stigma. The informal waste sector consists mostly of waste pickers who scavenge for metals, glass, plastic, textiles, and other materials and then trade them for a profit. This sector can significantly alter or reduce waste in a particular system, but other negative economic effects come with the disease, poverty, exploitation, and abuse of its workers.[12]
Resource recovery
Waste not the Waste. Sign in Tamil Nadu, India
Main article: Resource recovery
People who earn their living by collecting and sorting garbage and selling them for recycling (waste pickers), Smokey Mountain, Philippines.
Resource recovery is the retrieval of recyclable waste, which was intended for disposal, for a specific next use.[13] It is the processing of recyclables to extract or recover materials and resources, or convert to energy. This process is carried out at a resource recovery facility.[14] Resource recovery is not only important to the environment, but it can be cost effective by decreasing the amount of waste sent to the disposal stream, reduce the amount of space needed for landfills, and protect limited natural resources.[15]
Energy recovery
Energy recovery from waste is using non-recyclable waste materials and extracting from it heat, electricity, or energy through a variety of processes, including combustion, gasification, pyrolyzation, and anaerobic digestion.[16] This process is referred to as waste-to-energy.
There are several ways to recover energy from waste. Anaerobic digestion is a naturally occurring process of decomposition where organic matter is reduced to a simpler chemical component in the absence of oxygen.[16] Incineration or direct controlled burning of municipal solid waste to reduce waste and make energy. Secondary recovered fuel is the energy recovery from waste that cannot be reused or recycled from mechanical and biological treatment activities.[16] Pyrolysis involves heating of waste, with the absence of oxygen, to high temperatures to break down any carbon content into a mixture of gaseous and liquid fuels and solid residue.[16] Gasification is the conversion of carbon rich material through high temperature with partial oxidation into a gas stream.[16] Plasma arc heating is the very high heating of municipal solid waste to temperatures ranging from 3,000-10,000 °C, where energy is released by an electrical discharge in an inert atmosphere.[16]
Using waste as fuel can offer important environmental benefits. It can provide a safe and cost-effective option for wastes that would normally have to be dealt with through disposal.[16] It can help reduce carbon dioxide emissions by diverting energy use from fossil fuels, while also generating energy and using waste as fuel can reduce the methane emissions generated in landfills by averting waste from landfills.[16]
There is some debate in the classification of certain biomass feedstock as wastes. Crude Tall Oil (CTO), a co-product of the pulp and papermaking process, is defined as a waste or residue in some European countries when in fact it is produced “on purpose” and has significant value add potential in industrial applications. Several companies use CTO to produce fuel,[17] while the pine chemicals industry maximizes it as a feedstock “producing low-carbon, bio-based chemicals” through cascading use.[18]
Education and awareness
Education and awareness in the area of waste and waste management is increasingly important from a global perspective of resource management. The Talloires Declaration is a declaration for sustainability concerned about the unprecedented scale and speed of environmental pollution and degradation, and the depletion of natural resources. Local, regional, and global air pollution; accumulation and distribution of toxic wastes; destruction and depletion of forests, soil, and water; depletion of the ozone layer and emission of "green house" gases threaten the survival of humans and thousands of other living species, the integrity of the earth and its biodiversity, the security of nations, and the heritage of future generations. Several universities have implemented the Talloires Declaration by establishing environmental management and waste management programs, e.g. the waste management university project. University and vocational education are promoted by various organizations, e.g. WAMITAB and Chartered Institution of Wastes Management.
Gallery
Vegetable waste being dumped in a market in Hyderabad
Weapon scraps
Agobox; Bio-medical Waste
Hospital waste
Waste collected in a tricycle
See also
Environment portal
Book: Pollution
Biological hazard
Chemical hazards
Environmental dumping
Fly-tipping
Garbage truck
Global waste trade
Human waste
List of waste management acronyms
Litter
Midden
Recycling
Waste Atlas
Waste by country
Waste collection
Waste converter
Waste management
References
^“Basel Convention.” 1989. "Archived copy" (PDF). Archived (PDF) from the original on 2017-05-16. Retrieved 2017-05-27.CS1 maint: archived copy as title (link)
^Glossary of Environment Statistics Archived 2013-01-04 at the Wayback Machine. 1997. UNSD. Updated web version 2001.
^"Directive 2008/98/EC of the European Parliament and of the Council of 19 November 2008 on waste and repealing certain Directives (Text with EEA relevance)". europa.eu. 22 November 2008.
^"Solid Waste Management." 2005. United Nations Environment Programme. Chapter III: Waste Quantities and Characteristics, 31-38. unep.or.jp Archived 2009-10-22 at the Wayback Machine
^ ab“International Waste Activities.” 2003. U.S. Environmental Protection Agency. 12 Oct 2009. epa.gov Archived 2009-10-16 at the Wayback Machine
^"Improving Recycling Markets." OECD Environment Program. Paris: OECD, 2006. oecd.org Archived 2015-09-24 at the Wayback Machine
^Diaz, L. et al. Solid Waste Management, Volume 2. UNEP/Earthprint, 2006.
^Wolsink, M. "Entanglement of interests and motives: Assumptions behind the NIMBY-theory on Facility Siting." Urban Studies 31.6 (1994): 851-866.
^Ray, A. "Waste management in developing Asia: Can trade and cooperation help?" The Journal of Environment & Development 17.1 (2008): 3-25.
^“Muck and brass: The waste business smells of money.” The Economist. 2009 02 28. pp. 10-12.
^ Journal of Cleaner Production 13 (2005): 253-263.
^Wilson, D.C.; Velis, C.; Cheeseman, C. "Role of informal sector recycling in waste management in developing countries." Habitat International 30 (2006): 797-808.
^USEPA (2012). "Frequent Questions". Archived from the original on 2014-04-07.
^Government of Montana (2012). "Resource Recovery". Archived from the original on 2014-04-07.
^Grand Traverse County (2006). "What is Resource Recovery?". Archived from the original on 2014-04-07.
^ abcdefghIGD (2007). "Energy Recovery and Disposal". Archived from the original on 2014-04-07.
Brazilian journal of biology = Revista brasleira de biologia. ;79(4)589-593.
The objective of this study was to evaluate the ability to degrade organic matter by edaphic macrofauna (worms), carbon/nitrogen (C/N) ratio and hydrogenation potential (pH) during the vermicomposting process in different organic residues. The treatments were constituted by organic residues of anima
How people value different ecosystems within the Great Barrier Reef.
Marshall NA, Dunstan P, Pert P, Thiault L.
Journal of environmental management. 2019 Aug;243()39-44.
Natural ecosystems hold great place within the hearts and lives of people, particularly those within which people live and work. However, whether people equally value natural ecosystems that they regularly frequent is effectively unknown. Such knowledge would greatly assist natural resource managers
Vector control remains the primary method to prevent dengue infections. Environmental interventions represent sustainable and safe methods as there are limited risks of environmental contamination and toxicity. The objective of this study is to perform a systematic review and meta-analysis of the ef
Examining of additive carbon kind and particle size to MEA with self-water management on PEFC for cost reduction
Sugiura Kimihiko,Ota Ikuya,Oya Naoyuki
グランド再生可能エネルギー国際会議論文集 1(0), 217, 2018
… Although we were able to confirm that graphite rubbish functioned as water absorption/feed grain and the grain diameter and the additive rate of graphite rubbish were optimized last year, the reaction mechanism of the added graphite in the membrane was not elucidated. …
rubbish 【名】 くず、がらくた、ごみ、廃棄物、廃物 【同】garbage ; trash・I took my old rubbish to t...【発音】rʌ biʃ【カナ】ラビッシュ【変化】《動》rubbishes ｜ rubbishing ｜ rubbished - アルクがお届けするオンライン英和・和英辞書 ...
