Racho, P., Wichitsathian, B., & 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), 1172–1184. retrieved from https://so01.tci-thaijo.org/index.php/APST/article/view/83507