ABSTRACT
Wastewater originated from various industries like textile, agriculture, food, petrochemical, polymer, pharmaceutical, etc. and contains a large number of contaminants of oil and salt of inorganic and organic compounds. When this wastewater released into the ecosystem without any appropriate treatments causes major ecological issues with high environmental impacts. Also, the natural fresh water resources are getting depleted because of the increased demand for fresh water supply. There are different physical, chemical, and biological methods are developed for the treatment of water but these methods cannot abolish the contaminants. And also most of these conventional methods are very expensive. The development of green technology for water treatments has received enormous interest over recent years due to its significant advantages to the environment, society, and economy. In this chapter, we discuss the various green technologies for the treatment of water and wastewater.
