Sewage Treatment Plant (STP)
In early 1900, domestic wastewater i.e. sewage was generally disposed off either in pits, open ground or on surface water bodies. Due to increase in population and rapid industrialization, urban development took place resulted in accumulation of waste in densely crowded habitation/cluster. In order to protect public health and maintain a good standard of living, it became a necessity to treat domestic wastewater before letting it flow into surface streams.