Ansari joveini, Hamidreza, Javid, Amirhoseini, Hasani, Amirhesam, Kashefiolasl, Morteza. “Comparison of the effect of up-flow and down-flow Cascade anaerobic bioreactors in industrial wastewater treatment of sugar factory.” Water Engineering, vol. 9, no. 3, 2021, pp. 1-13.