Removal of Suspended Solids Using Pumice Stone in Integrated Fixed Film Activated Sludge Process. Baghdad Science Journal, Iraq, Baghdad, v. 18, n. 1, p. 0041, 2021. DOI: 10.21123/bsj.2021.18.1.0041. Disponível em: https://bsj.uobaghdad.edu.iq/index.php/BSJ/article/view/5432.. Acesso em: 27 apr. 2024.