The effect of artificial support material existence on removal of organic and nutrient in laboratory scale using plug flow reactor (PFR)Sarah Aphirta, Prayatni Soewondo, Nida Maisa Zakiyya, Dyah Wulandari Putri and Barti Setiani MuntalifE3S Web Conf., 148 (2020) 01003DOI: https://doi.org/10.1051/e3sconf/202014801003