Waste refers to materials that are no longer needed.
These materials are mostly as result of human activities . Waste disposal is the way in which we get rid
off those materials
Types
of waste
Waste can be classified according to its
state, i.e solid, liquid or gas
a.
Solid waste
Examples is household garbage, mining waste,
plastic, paper, glass and construction waste
b.
Liquid waste.
Example is urine, water from bathroom and
kitchens and chemical from industry.
c. Gaseous
waste
Example is ammonia and sulphurdioxide gas
from industry and lead from petrol in motor vehicle
Table which source and types of waste
|
Source
|
Types of waste
|
|
Household
|
Sewage: urine, faeces and water
Water from baths, washbasins and sinks
Plastics: shopping bags, container, water and juice
bottle, old utensil and old toys
Paper: newspapers, cardboard, old books and magazine
Glass: broken utensils and window
Vegetation: branches, rotten fruits, and vegetable,
leaves and peels.
Old furniture
Old clothes
Electronic waste: mobile phone, batteries and old
appliance
Chlorofluorocarbon from spray and fringe coolants
Farm animal waste: animal faces and urine |
|
School
|
Sewage: urine, feaces and water
Water from baths, washbasins and sinks
Plastics: shopping bags, container, water and juice
bottle, old utensil and old toys
Paper: newspapers, cardboard, old books and magazine
Glass: broken utensils and window
Vegetation: branches, rotten fruits, and vegetable,
leaves and peels.
Old furniture
Chemical from the laboratory |
|
Industry
|
Scrap metal
Coolants and lubricants used in machine
Industrial chemical
Waste gases such as carbon monoxide sulphurdioxide and
ammonia
Waste water
Plastic and metal containers
Slaughterhouse waste such as skeleton and blood
Construction and demolition waste |
|
Medicals facilities
|
Soiled dressing
Needles and blades
Plastics container and syringes
Blood
Chemical such as reactant and medicines
Amputated organs
Waste from maternity wards such as placenta |
Waste can come from living thing or non
living things. For example plastics ,paper and metallic waste originate from
non living things and they are called non
biodegradable and sewage, leaves and branches come from living this, waste
from living thing are called biodegradable.
They can be decomposed by bacteria and other living organism. For
example of such waste are food remain, woods, paper and cotton clothes.
Biohazardous waste can transmit
infection and disease this term is commonly used to refer to medical waste.
Waste
disposal
Waste disposal refers to collections,
transportation, processing, re-use and other activities that help us to get rid
of waste
This helps us to reduce adverse effects of
waste on human health and the environment.
Basic
principles of waste disposal
There are three basic principle of waste disposal
that can help us to better manage our waste. These are:
1.
Reducing: Reducing the amount of waste we produce for example we do nnot
have buy plastic bags each time we go shopping, we can carry a woven basket
instead.
2. Re-using:
Re-using items instead of throwing them away. For instance we can use an empty
margarine container to store sugar.
3. Recycling:
Recycling waste items, some waste can be changed to other product example
broken glass can be melted and use to make new glass bottle