Amatya, I.M., Kansakar, B.R., Tare, V. and Fiksdal, L. 2011. Role of pH on biological Nitrification Process. Journal of the Institute of Engineering. 8, 1-2 (Jul. 2011), 119–125. DOI:https://doi.org/10.3126/jie.v8i1-2.5102.