Question

classification of wastes based on their physical states

Answer 1

In general, the wastes maybe categorized as follows:

Solid wastes:

The solid wastes are the useless and unwanted substances discarded by human society. These include urban wastes, industrial wastes, agricultural wastes, biomedical wastes and radioactive wastes. The term refuse is also used for solid waste.

Liquid wastes:

Wastes generated from washing, flushing or manufacturing processes of industries are called liquid wastes. Such a waste is called sewage. The most common practice is to discharge it on the ground, nallahs, rivers and other water bodies, often without any treatment.

Gaseous wastes:

These wastes are released in the form of gases from automobiles, factories, burning of fossil fuels etc. and get mixed in the atmosphere. These gases include carbon monoxide, CO2, sulphur dioxide, nitrogen dioxide, ozone, methane, etc.

Answer 2

Classification of Wastes: In general, the wastes are classified on the basis of their biological, chemical and physical properties and also on the basis of nature.