Racho, P., Wichitsathian, B. and Jindal, R. 2017. Feasibility of low cost post-treatment options for the anaerobic processes of tapioca starch wastewater: Fungal Down-flow Hanging Sponge (DHS) and Bacterial DHS systems. Asia-Pacific Journal of Science and Technology. 13, 10 (Apr. 2017), 1172–1184.