“The Use of Anaerobic Digestion Process in the Treatment of Dairy Wastewater by Microorganisms Derived from Sewage Wasted Sludge”. Journal of Engineering and Sustainable Development 16, no. 4 (December 1, 2012): 181–194. Accessed May 19, 2024. https://jeasd.uomustansiriyah.edu.iq/index.php/jeasd/article/view/1234.