Pitriani, ., Fajaruddin Natsir, M., & Daud, A. (2015). The Effectiveness of EM4 Addition into Anaerob-Aerob Biofilter in the Processing of Wastewater at Hasanuddin University Hospital, Makassar Indonesia. International Journal of Sciences: Basic and Applied Research (IJSBAR), 22(1), 178–187. Retrieved from https://gssrr.org/index.php/JournalOfBasicAndApplied/article/view/3845