_____% of our waste comes from from mining, oil & gas production, agriculture, industrial production (scrap metal, plastic, etc.)

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Presentation transcript:

_____% of our waste comes from from mining, oil & gas production, agriculture, industrial production (scrap metal, plastic, etc.)

We are only ______% of the world's population yet we create _____% of the world's wastes

Legal Definition of hazardous waste

Things not included in hazardous waste

Views waste as unavoidable, and must be handled in a way that, reduces harm Deal with waste by burying,burning, shipping off

Waste is... - A potential resource - Harmful and should not be made in the first place

First Priority of Waste Management - change industrial processes to eliminate the use of harmful chemicals - reduce packaging in materials and products - make products that last longer and are recyclable, reuseable, or easy to repair

Second Priority of Waste Management - Reuse - Repair - Recycle - Compost - buy reuseable and recyclable products

Last Priority of Waste Management - Treat waste to reduce toxicity - incinerate waste - bury waste in landfills - Release waste into environment for dispersal and dilution

Ways to reduce waste production

Benefits of reusing

Primary (Closed-loop) recycling

Secondary (Open-loop) recycling

Used for large scale recycling, collects urban wastes and separates or shreds it; valuable materials sold to manufacturers as new materials, left-over wastes (mainly non-recyclable plastics and paper) are burned

most recycled ITEM (56%)

Critics view of recycling

Proponents view of recycling

Advantages of recycling

Burns trash to create electricity

we burn ____% of solid wastes and _____% of hazardous wastes

Problems of incineration

Benefits of landfills

Problems with landfills -Traffic, noise, dust, smell - Slow decomposition - Little/no water & oxygen - Methane, H2S, volatile gases - Groundwater contamination - ALL LANDFILLS WILL EVENTUALLY LEAK

First priority of managing hazardous waste which involves : - change industrial processes to reduce or eliminate industrial processes - recycle and reuse hazardous waste

Second priority of managing hazardous waste - natural decomposition - incineration - Thermal treatment - Chemical, physical, and biological treatment - dilution in air or water

Last priority of managing hazardous waste which includes : - landfill - underground injection wells - surface impoundments - underground salt formations

Ways to detox hazardous wastes

Incinerate at high temps Reduced to atoms, released as gasses (CO, CO2, toxic metals, some particulates) More complete incineration than normal

Biological detox methods (for hazardous wastes)

Pump hazardous waste into dry rock BELOW aqifers

Put hazardous wastes into ponds or lagoons, solids will settle and liquids will evaporate..has many transport and leak issues

Who didn’t sign the Basel Treaty?

What is due next week?