A REVIEW ON TREATMENT PROCESSES FOR MUNICIPAL WASTE WATER

Abstract

Nowadays many water resources are polluted by anthropogenic sources including household and
agricultural waste and industrial processes. Public concern over the environmental impact of wastewater pollution
has increased. Several conventional wastewater treatment techniques, i.e. chemical coagulation, adsorption,
activated sludge, have been applied to remove the pollution, however there are still some limitations, especially
that of high operation costs. The use of aerobic waste water treatment as a reductive medium is receiving increased
interest due to its low operation and maintenance costs. In addition, it is easy-to-obtain, with good effectiveness
and ability for degrading contaminants. This paper reviews the use of waste water treatment technologies to remove
contaminants from wastewater such as halogenated hydrocarbon compounds, heavy metals, dyes, pesticides, and
herbicides, which represent the main pollutants in wastewater. The main purpose of wastewater treatment is to remove
the various contaminants that presence in the wastewater such as suspended solids, organic carbon, nutrients,
inorganic salts, heavy metals, pathogens and so on. The ultimate goal of the wastewater treatment is to provide the
protection in terms of human health and environmental aspect.