The effect of irrigation by domestic waste water on soil properties

Abstract

To investigate the beneficial impacts of domestic waste water on soil properties, we conducted an experiment in the 
lysimeter by measuring certain features essentially related to soil characteristics. The objectives in this study were (i) 
the domestic waste water in filtration by soil and (ii) the effect of domestic waste water on soil properties. In this 
experiment, we had 15 lysimeters that 1 - 5 lysimeters were irrigated by domestic waste water and primary drainage 
water was accumulated from these lysimeters and 6 - 9 lysimeters were irrigated by primary drainage water and 
secondary drainage water was accumulated and 10, 11 and 12 lysimeters were irrigated by secondary drainage water. 
In order to compare soil properties, 13, 14 and 15 lysimeters were irrigated by agronomical water and finally, soil and 
water properties were analyzed in each stage. The results showed that, soil could filter the domestic waste water and 
reduced BOD5 and COD of domestic waste water. Also, irrigation with domestic waste water increased nutritive 
elements in soil that can be source of nutrition for plants. The findings may give applicable advice to commercial 
farmers and agricultural researchers for management and proper use of water.