Priya VS , Ayisha Sidiqua M, Ajay M. “Effect of Operational Parameters and Suitability of Biological Reactors for the Removal of VOC from Pharmaceutical Wastewater- A Review”. International Journal of Advanced Science and Technology, Vol. 29, no. 10s, June 2020, pp. 4007-10, http://sersc.org/journals/index.php/IJAST/article/view/21017.