Sewage systems have been available almost everywhere. Just like domestic buildings, sewage systems have also existed at industrial and institutional buildings. Large amount of wastewater is generated through these sewage systems. Sewage water treatment procedure includes several processes like chemical, biological and physical processes of water treatment. These methods of treatment successfully remove mud, effluents and poisonous materials from wastewater of sewage. The most advanced technologies are used in our sewage water treatment plants.