Ang susunod na programa ay rated
Ang susunod na programa ay rated
HAZARDOUS AND TOXIC WASTES
Hazardous wastes
Hazardous waste –
those are capable of harming
people and the environment
(acidic resins, arsenic, heavy
metals, organic solvents,
pesticides and radioactive
materials.
EXAMPLES OF HAZARDOUS WASTE CAR BATTERIES PESTICIDE
LIGHT BULBS USED MOTOR OIL
Toxic waste
Toxic waste
is waste material that can
cause death, injury or birth
defects to living creatures. It
spreads quite easily and can
contaminate lakes, rivers,
and the atmosphere.
EXAMPLES OF TOXIC WASTE
Dioxins:
- Produced by burning chlorine-containing substances, plastics; the manufacture of iron and steel, and some organic chemicals.
Heavy metals:
- Widespread industrial use, such as in cadmium and nickle plating. Found in batteries (mercury, cadmium, lead) and leaded petrol.
Radioactive waste:
- By-product of nuclear power generation and used in medicine (e.g. cancer therapy).
Methods of disposal
3 - Recycling
1 - Landfill
2 - Incineration
Landfill
- The disposal of refuse and other waste material by burying it and covering it over with soil.
Sanitary Landfills
Sanitary Landfill
Hazardous Waste Landfill
Bulk waste
Imperviousclay
Earth
Water table
Groundwater
Clay cap
Gas vent
TopsoilEarth
Sand
Plastic cover
Impervious clay cap
Leakdetectionsystem
Reactionwastesin dreams
Double leachatecollection system
Plastic double liner
Groundwatermonitoringwell
Incineration
Incineration is a disposal method in which solid organic wastes are subjected to combustion so as to convert them into residue and gaseous products. This method is useful for disposal of residue of both solid waste management and solid residue from waste water management. This process reduces the volumes of solid waste to 20 to 30 percent of the original volume. Incineration and other high temperature waste treatment systems are sometimes described as "thermal treatment". Incinerators convert waste materials into heat, gas,steam and ash.
Waste-to-energy Incinerator
Recycling
Recycling is a resource recovery practice that refers to the collection and reuse of waste materials such as empty beverage containers. The materials from which the items are made can be reprocessed into new products.
How can we shrink the waste stream so we don’t have to rely on disposal methods?
REDUCE!REUSE!RECYCLE!In that order…
REDUCEBuy foods with less packaging
Bring your own bags for carrying groceries- no paper OR plastic
Bring your own bottles/cups
Look for products that use fewer toxins
If choosing between glass, metal or plastic- choose glass or metal
Preferred Hierarchy:
No packaging
Minimal packaging
Reusable packaging
Recyclable packaging
Compost your yard waste & kitchen scraps
If using plastic use photodegradable or biodegradable plastic
Cons:
Don’t go away completely
May add toxins to soil
Never decompose in sanitary landfill
People may think littering is OK
REUSE Reuse/resell things that are still
good
Auto parts sold thru junkyards- demanufacturing
Salvage parts (doors, stained glass) from old buildings
Some areas provide money to return bottles for refilling
Donate clothing/toys to charities that will sell them for money
Preferred over recycling because material doesn’t have to be reprocessed
RECYCLE Reprocessing of discarded materials into
new, useful products. Recycle glass into other glass products Recycle tires into rubberized road surfacing Problems:
Plastic recyclables can be contaminated by one PVC bottle in a truckload
Plastic recycling is down 50% b/c so many people consume these bottles on the go.
Benefits: Saves water, energy, raw materials, land
space Lowers demand for raw resources- less
deforestation, mining Producing aluminum from scrap instead
of bauxite ore cuts energy need by 95% Reduces pollution Makes one think about waste they produce Cut waste volumes & reduce pressure on
landfills Reduces litter problems
Why Is Reusing and Recycling Materials So Important?
Reusing items decreases the use of matter
and energy resources and reduces
pollution and natural capital degradation;
recycling does so to a lesser degree.
THE END
THANK YOU !