subject: Sewage Treatment Plant Works A Lot To Protect The Environment [print this page] The constant development in the technological sector has led to urbanization on a grand scale all over the world. Today, the world is burdened with population. As a result, the industries that were designed to bring comfort in human life are running out of their capacity and this is giving rise to desperation among people.
With people becoming more and more self centered, the issue of environmental decadence has gone largely undermined. Hence, we see a huge negative impact of uncontrolled industrialization on the balance of nature, global warming being the most glaring example of what the earth is going through. However, some steps have been taken to safeguard the ecological balance. Sewage treatment plants are designed to treat the contaminated sewerage water before it is released in the natural water system.
Sewage treatment plant implement biological, physical and chemical processes in order to make the water free of contaminants. These plants produce environmentally safe fluid and solid wastes which can disposed of or reused as manures. Sewage treatment plants can treat both household and industrial water. In case of household water treatment the plants are generally operated by the local municipal bodies. However, huge industrial complexes may sometimes have their own water treatment plants in which they treat their own industrial waste water and release it into nature.
Sewage water treatment mainly consists of two stages, primary treatment and secondary treatment. In primary treatment the sewage water is temporarily held in quiescent basin. Here the heavy solids drops at the bottom and lighter solids float on the surface. The solid and lighter wastes are then removed and the water is then passed to the secondary stage of treatment.
In the secondary treatment the biological substances are removed by micro-organisms before releasing the water in the natural environment. However, if the water is to be released in an ecologically sensible area the sewage treatment plants may require executing a third stage of treatment known as tertiary treatment. The water that is released can be used for agricultural purposes and if the water is sufficiently clean it can also be used to reinforce the groundwater level.
