The major methods of waste management are:
2. Composting an aerobic, biological process
of degradation of biodegradable organic matter.
1. Recycling the process of
extracting resources or value from waste is generally referred to as recycling,
meaning to recover or reuse the material.
3. Sewage treatment a process of treating raw
sewage to produce a non-toxic liquid effluent which is discharged to rivers or
sea and a semi-solid sludge, which is used as a soil amendment on land,
incinerated or disposed of in land fill.
4. Incineration a process of combustion designed
to recover energy and reduce the volume of waste going to disposal.
5. Landfill the deposition of waste in a
specially designated area, which in modern sites consists of a pre-constructed
‘cell’ lined with an impermeable layer (man-made or natural) and with controls
to minimize emissions.
Incineration
and other high temperature waste treatment systems are sometimes described as
"thermal treatment". Incinerators
convert waste materials into heat, gas, steam, and ash.
Why is waste disposal a problem?
Waste disposal has become a major problem due to
the following factors
1.
People’s bad habits for example dumping waste on footpath or on the roadside orthrowing
it from vehicles
2.
Using excessive paging for example wrapping pieces of candy in two layer of
plastic
point
or waste bins
5.
Failure by the local authorities to enforce effective punishment to those who litter
public
place to a act as warning to other offender.