Waste Management

WASTE MANAGEMENT

WASTE
WASTE
• any material “thrown away”
• regarded as useless and unwanted (at a certain time and place)

KINDS OF WASTE
Solid wastes domestic, commercial and industrial wastes especially common as co-disposal of wastes
Examples: plastics, styrofoam containers, bottles, cans, papers, scrap iron, and other trash

Liquid Wastes : wastes in liquid form
Examples: domestic washings, chemicals, oils, wastewater from ponds, manufacturing industries and other sources

CLASSIFICATION OF WASTES
ACCORDING TO THEIR PROPERTIES
Bio-degradable
cannot be degraded (plastics, bottles, old machines, cans, styrofoam containers and others)

Non-biodegradable can be degraded (paper, wood, fruits and others)

Classification of Wastes according to their Effects on Human Health and the Environment
Hazardous wastes
Substances unsafe to use commercially, industrially, agriculturally, or economically that are shipped, transported to or brought from the country of origin for dumping or disposal in, or in transit through, any part of the territory of the Philippines
Non-hazardous
Substances safe to use commercially, industrially, agriculturally, or economically that are shipped, transported to or brought from the country of origin for dumping or disposal in, or in transit through, any part of the territory of the Philippines

PROBLEMS
•

We loose our non-renewable natural resources

•

We throw away a lot of material and energy present in waste

•

We produce waste having a changed composition and characteristics as the raw materials used

•

We pollute and poison the environment

PROBLEMS CAUSED BY IMPROPER
DISPOSAL OF WASTE
Threat to public health rodents, insects = vectors of diseases (transmit pathogens)
typhoid, plague poisonous materials flammable materials
Irreversible environmental damage in ecosystems terrestrial and aquatic air pollution (incineration) water pollution (land burial)
Technical and environmental difficulties + administrative, economic and social problems PROBLEMS WITH LAND DISPOSAL OF WASTE
 too little space for disposal
 costs
 harm to the environment and public health  landfills are unreliable in long run
 aesthetics
 public opposition

WASTE MANAGEMENT
Solve the technical and environmental difficulties, administrative, economic and social problems
Tasks to be done:
–Planning
–Design
–Construction
–Operation of facilities for
In the field of:
–Collecting,
–Transporting,
–Processing,
–Disposing of the waste material

WHAT SHOULD BE DONE?

PROPER SEGREGATION OF WASTES

4Rs - Refuse, Reduce, Reuse and Recycle
• Refuse: Do not buy or accept anything you do really need. Say ‘No’ to plastic bags:
One of the biggest sources of pollution in
Indian cities is the ubiquitous plastic bag.
Refuse to accept one. Instead, carry a cloth shopping bag with you.
• Reduce the amount of garbage generated.
Make sure that whatever is being thrown is being done so after it has been used and refused to the maximum extent possible. Consuming fewer resources and this process greatly reduces the garbage.

4Rs - Refuse, Reduce, Reuse and Recycle
• Reuse: Reuse everything to its maximum after properly cleaning it.
• Recycle: Keep things which can be recycled to be given to rag pickers or waste pickers.

RECYCLING
Not yet economical (regulations can help)
Does not eliminate the waste disposal problem non recyclable residue
Requires selection
Recycled paper is never as good as new but can be used
+
Protection of environment (eg. less harvesting of trees)
Save our resources (they are less and less)
Al cans, glass, rubber, plastic – more and better technologies for recycling Energy saving (96% of E is saved by recycling Al cans)

QUESTIONS

Questions?
Thank You!