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 !