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Single-stream Recycling
Single-stream (also known as “fully commingled” or "single-sort") recycling refers to a system in which all paper fibers, plastics, metals, and other containers are mixed in a collection truck, instead of being sorted by the depositor into separate commodities (newspaper, paperboard, corrugated fiberboard, plastic, glass, etc.) and handled separately throughout the collection process. In single-stream, both the collection and processing systems are designed to handle this fully commingled mixture of recyclables, with materials being separated for reuse at a materials recovery facility. The single-stream option replaces the dual-stream option, which is where people separate certain recyclable materials and place them in separate containers for collection. Typically, dual-stream has partial commingled materials such as glass, plastic and metals in one stream separated from paper products in the other stream. From an end consumer perspective, single-stream is easier to participa ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Municipal Recycling Facilities, Montgomery County, MD
A municipality is usually a single administrative division having corporate status and powers of self-government or jurisdiction as granted by national and regional laws to which it is subordinate. The term ''municipality'' may also mean the governing body of a given municipality. A municipality is a general-purpose administrative subdivision, as opposed to a special-purpose district. The English word is derived from French , which in turn derives from the Latin , based on the word for social contract (), referring originally to the Latin communities that supplied Rome with troops in exchange for their own incorporation into the Roman state (granting Roman citizenship to the inhabitants) while permitting the communities to retain their own local governments (a limited autonomy). A municipality can be any political jurisdiction, from a sovereign state such as the Principality of Monaco, to a small village such as West Hampton Dunes, New York. The territory over which a municip ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Telephone Book
A telephone directory, commonly called a telephone book, telephone address book, phonebook, or the white and yellow pages, is a listing of telephone subscribers in a geographical area or subscribers to services provided by the organization that publishes the directory. Its purpose is to allow the telephone number of a subscriber identified by name and address to be found. The advent of the Internet, search engines, and smartphones in the 21st century greatly reduced the need for a paper phone book. Some communities, such as Seattle and San Francisco, sought to ban their unsolicited distribution as wasteful, unwanted and harmful to the environment.Yellow Pages ruling endangers SF ban Heather Knight, '' |
Popular Science
Popular science (also called pop-science or popsci) is an interpretation of science intended for a general audience. While science journalism focuses on recent scientific developments, popular science is more broad ranging. It may be written by professional science journalists or by scientists themselves. It is presented in many forms, including books, film and television documentaries, magazine articles, and web pages. History Before the modern specialization and professionalization of science, there was often little distinction between "science" and "popular science", and works intended to share scientific knowledge with a general reader existed as far back as Greek and Roman antiquity. Without these popular works, much of the scientific knowledge of the era might have been lost. For example, none of the original works of the Greek astronomer Eudoxus (4th century BC) have survived, but his contributions were largely preserved due to the didactic poem '' Phenomena'' writte ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Waste Characterization
Waste characterisation (or ''waste characterization'' in the United States) is the process by which the composition of different waste streams is separated, "separate collection," and analyzed. Waste characterisation plays an essential part in waste treatment, which may occur. Developers of new waste technologies must analyze and evaluate what waste streams consist of to offer proper treatment. The biodegradable element of the waste stream is vital in systems such as composting or anaerobic digestion. Waste characterisation is a manual process carried out beside waste management plants. It consists of taking a tonne from a garbage truck, dividing the sample into four parts, mixing them, dividing again into four parts, and taking one of them (250kg) to analyze manually. This process takes around 3-4 hours to complete and generally involves 2-4 people. Even if this process is carried out very frequently (usually every 2 or 3 days), it is only a sample of the waste composition. Sol ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Resource Recovery
Resource recovery is using wastes as an input material to create valuable products as new outputs. The aim is to reduce the amount of waste generated, thereby reducing the need for landfill space, and optimising the values created from waste. Resource recovery delays the need to use raw materials in the manufacturing process. Materials found in municipal solid waste, construction and demolition waste, commercial waste and industrial wastes can be used to recover resources for the manufacturing of new materials and products. Plastic, paper, aluminium, glass and metal are examples of where value can be found in waste. Resource recovery goes further than just the management of waste. Resource recovery is part of a circular economy, in which the extraction of natural resources and generation of wastes are minimised, and in which materials and products are designed more sustainably for durability, reuse, repairability, remanufacturing and recycling. Life-cycle analysis (LCA) can be u ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Materials Recovery Facility
A materials recovery facility, materials reclamation facility, materials recycling facility or multi re-use facility (MRF, pronounced "murf") is a specialized waste sorting and recycling system that receives, separates and prepares recyclable materials for marketing to end-user manufacturers. Generally, the main recyclable materials include ferrous metal, non-ferrous metal, plastics, paper, glass. Organic food waste is used to assist anaerobic digestion or composting. Inorganic inert waste is used to make building materials. Non-recyclable high calorific value waste is used to making refuse-derived fuel (RDF) and solid recovered fuel (SRF). Industry and locations In the United States, there are over 300 materials recovery facilities. The total market size is estimated at $6.6B as of 2019. As of 2016, the top 75 were headed by Sims Municipal Recycling out of Brooklyn, New York. Waste Management operated 95 MRF facilities total, with 26 in the top 75. ReCommunity operated 6 in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
List Of Waste Types
Waste comes in many different forms and may be categorized in a variety of ways. The types listed here are not necessarily exclusive and there may be considerable overlap so that one waste entity may fall into one to many types. * Agricultural waste * Animal by-products (see Animal product#Slaughterhouse waste, slaughterhouse waste) * Biodegradable waste * Biomedical waste * Bulky waste * Business waste * Chemical waste * Clinical waste (see Biomedical waste) * Coffee wastewater * Commercial waste * Composite waste * Construction and demolition waste (C&D waste) * Controlled waste * Demolition waste * Dog waste * Domestic waste * Electronic waste (e-waste) * Food waste * Green waste * Grey water * Hazardous waste * Household waste ** Household hazardous waste * Human waste ** Sewage sludge * Industrial waste ** Slag ** Fly ash ** Sludge * Inert waste * Inorganic waste * Kitchen waste * Litter * Marine debris * Medical waste * Metabolic waste. See also Feces. * Mineral waste. See ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Curbside Collection
Kerbside collection or curbside collection is a service provided to households, typically in urban and suburban areas, of collecting and disposing of household waste and recyclables. It is usually accomplished by personnel using specially built vehicles to pick up household waste in containers that are acceptable to, or prescribed by, the municipality and are placed on the kerb. History Before the 20th century, the amount of waste produced by a household was relatively small. Household waste was often simply thrown out of an open window, buried in the garden or deposited in outhouses (see more at urban archaeology). When human concentrations became more dense, waste collectors, called nightmen or gong farmers were hired to collect the night soil from pail closets, performing their duties only at night (hence the name). Meanwhile, disposing of refuse became a problem wherever cities grew. Often refuse was placed in unusable areas just outside the city, such as wetlands and ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Eddy Current Separator
An eddy current separator (ECS) is a machine that uses a powerful magnetic field to separate non-ferrous metals from an input waste or ore stream. The device makes use of eddy currents to effect the separation. Non-ferrous metals typically separated by an ECS include aluminum, copper and die-cast metals. In waste sorting of single-stream recycling at materials recovery facilities, ECS is used after the waste has passed through some arrangement of magnets to remove ferrous metals. Eddy current separators are typically used at the end of the waste material stream, since ferrous metals will become heated when exposed to an eddy current field, leading to potential damage to the eddy current separator. In mining, ECS is sometimes used to separate metals from mined ore. Technique The eddy current separator is applied to a conveyor belt carrying a layer of mixed waste. At the end of the conveyor belt is an eddy current rotor. Non-ferrous metals caught in the eddy current end up in a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Landfill
A landfill is a site for the disposal of waste materials. It is the oldest and most common form of waste disposal, although the systematic burial of waste with daily, intermediate and final covers only began in the 1940s. In the past, waste was simply left in piles or thrown into pits (known in Archaeology, archeology as middens). Landfills take up a lot of land and pose environmental risks. Some landfill sites are used for waste management purposes, such as temporary storage, consolidation and transfer, or for various stages of processing waste material, such as sorting, treatment, or recycling. Unless they are stabilized, landfills may undergo severe shaking or soil liquefaction of the ground during an earthquake. Once full, the area over a landfill site may be Landfill restoration, reclaimed for other uses. Both active and restored landfill sites can have significant environmental impacts which can persist for many years. These include the release of gases that contribute to ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Downcycling
Downcycling, or cascading, is the recycling of waste where the recycled material is of lower quality and functionality than the original material. Often, this is due to the accumulation of tramp elements in secondary metals, which may exclude the latter from high-quality applications. For example, steel scrap metal, scrap from end-of-life vehicles is often contaminated with copper from wires and tin from coating. This contaminated scrap yields a secondary steel that does not meet the specifications for automotive steel and therefore, it is mostly applied in the construction sector. Origin and effect Downcycling can help to keep materials in use, reduce consumption of raw materials, and avoid the energy usage, greenhouse gas emissions, air pollution, and water pollution of primary production and resource extraction. The first documented use of the term ''downcycling'' was by Reiner Pilz in an interview by Thornton Kay in SalvoNEWS in 1994. We talked about the impending EU De ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Commodity
In economics, a commodity is an economic goods, good, usually a resource, that specifically has full or substantial fungibility: that is, the Market (economics), market treats instances of the good as equivalent or nearly so with no regard to who Production (economics), produced them. The price of a commodity good is typically determined as a function of its market as a whole: well-established physical commodities have actively traded spot market, spot and derivative (finance), derivative markets. The wide availability of commodities typically leads to smaller profit margins and diminishes the importance of factors (such as brand, brand name) other than price. Most commodities are raw materials, basic resources, agriculture, agricultural, or mining products, such as iron ore, sugar, or grains like rice and wheat. Commodities can also be mass-produced unspecialized products such as chemical substance, chemicals and computer memory. Popular commodities include Petroleum, crude ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
