Waste treatment and disposal encompasses the engineered processes and systems used to manage solid, liquid, and gaseous wastes to minimize environmental and human health impacts. It includes physical, chemical, and biological treatment methods such as sedimentation, filtration, adsorption, oxidation–reduction, incineration, composting, anaerobic digestion, and advanced thermal or physicochemical processes, often integrated with resource recovery (e.g., energy, nutrients, materials). Disposal refers to the final placement of residuals in landfills, deep-well injection, or other long-term containment systems designed with liners, leachate collection, gas management, and monitoring to control emissions, prevent groundwater contamination, and ensure regulatory compliance.
Wastewater plants emit about twice as much greenhouse gas as previously believed, according to Princeton engineers who used a mobile lab to check plants across the country.
Environment
Oct 9, 2025
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Each year, U.S. wastewater treatment plants clean trillions of gallons of water, from what we flush down the toilet to drain down the sink.
Environment
Oct 8, 2025
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Wastewater treatment plants (WWTPs) are a major source of greenhouse gas (GHG) emissions, including methane (CH₄) and nitrous oxide (N₂O).
Environment
Oct 8, 2025
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Imagine you have just finished a delicious to-go meal or morning coffee, or used the last drop of moisturizer. Without thinking too hard, you may be ready to toss another container into the trash, adding to the 82 million ...
Environment
Oct 1, 2025
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The accumulation and poor management of plastic fibers and particles remains a pressing global issue, with serious consequences for both human health and environmental sustainability.
Environment
Sep 29, 2025
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Many African cities still struggle with litter and garbage that is not properly disposed of. This poses serious public health risks. It attracts vectors of disease like mosquitoes and flies, and can lead to cholera and malaria ...
Environment
Sep 16, 2025
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Household waste constitutes 30–40% of municipal solid waste globally. Separating waste at the household level into compostable, recyclable, and non-recyclable is a crucial first step for local governments to process solid ...
Environment
Sep 10, 2025
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In 2020, haunting images of corroded metal barrels in the deep ocean off Los Angeles leapt into the public consciousness. Initially linked to the toxic pesticide DDT, some barrels were encircled by ghostly halos in the sediment.
Environment
Sep 9, 2025
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Researchers at National Taiwan University designed a graphene oxide biochar TiO2 nanocomposite that combines adsorption capacity with superior photocatalytic activity. With strong material characterization and optoelectronic ...
Nanomaterials
Sep 8, 2025
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We extract more than 100 billion tonnes of raw materials from Earth each year, then throw most of them away. The "circular economy" offers a different approach: instead of the linear "take-make-waste" model, we could reuse, ...
Environment
Sep 8, 2025
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1
