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  2. Waste oil - Wikipedia

    en.wikipedia.org/wiki/Waste_oil

    The U.S. EPA defines the term "used oil" as any petroleum or synthetic oil that has been used, and as a result of such use is contaminated by physical or chemical properties. [2] "Used oil" is a precise regulatory term. "Waste oil" is a more generic term for oil that has been contaminated with substances that may or may not be hazardous. [1]

  3. Automotive oil recycling - Wikipedia

    en.wikipedia.org/wiki/Automotive_oil_recycling

    Used oil re-refining is the process of restoring used oil to new oil by removing chemical impurities, heavy metals and dirt. [2] Used industrial and automotive oil is recycled at re-refineries. The used oil is first tested to determine suitability for re-refining, after which it is dehydrated and the water distillate is treated before being ...

  4. Oil sludge - Wikipedia

    en.wikipedia.org/wiki/Oil_sludge

    Oil sludge or black sludge is a gel-like or semi-solid deposit inside an internal combustion engine, that can create a catastrophic buildup. It is often the result of contaminated engine oil and occurs when moisture and/or high heat is introduced to engine oil.

  5. Maryland takes aim at industrial sludge with new bills. Here ...

    www.aol.com/maryland-takes-aim-industrial-sludge...

    A new law passed by the Maryland General Assembly takes aim at impacts of industrial sludge in the state. Here's what to know.

  6. Oil purification - Wikipedia

    en.wikipedia.org/wiki/Oil_Purification

    Oil filtration systems generally use a multistage filtration with coarse and fine filters. [2] Centrifugation is separation of oil and water, or oil and solid particles by centrifugal forces. Vacuum treatment degasses and dehydrates industrial oil. This method is well suited for removing dispersed and dissolved water, as well as dissolved gases ...

  7. Solid waste policy of the United States - Wikipedia

    en.wikipedia.org/wiki/Solid_waste_policy_of_the...

    Solid Waste Tree, Based on Resource Conservation and Recovery Act, United States Environmental Protection Agency. Solid waste means any garbage or refuse, sludge from a wastewater treatment plant, water supply treatment plant, or an air pollution control facility and other discarded material, including solid, liquid, semi-solid, or contained gaseous material resulting from industrial ...

  8. Exclusive-US EPA says it is auditing biofuel producers' used ...

    www.aol.com/news/exclusive-us-epa-says-auditing...

    The production of biodiesel from sustainable ingredients, like used cooking oil, can earn refiners a slew of state and federal environmental and climate subsidies, including tradable credits under ...

  9. Hazardous waste - Wikipedia

    en.wikipedia.org/wiki/Hazardous_waste

    Waste generated by a company or at an industrial setting is not HHW. The following list includes categories often applied to HHW. It is important to note that many of these categories overlap and that many household wastes can fall into multiple categories: Paints and solvents; Automotive wastes (used motor oil, antifreeze, etc.)

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