Sanjeevi Gandhi.A, Thilagaraj M, Pradeep Raj.R, Rajesh.P, Sriram.K. “Oxygen In Waste Water”. International Journal of Advanced Science and Technology, Vol. 29, no. 12s, May 2020, pp. 914 -23, http://sersc.org/journals/index.php/IJAST/article/view/22555.