Performance Evaluation of Trickling Filter and Extended Aeration of Wastewater Treatment Plants. Journal of Engineering, [S. l.], v. 26, n. 3, p. 93–99, 2020. DOI: 10.31026/j.eng.2020.03.08. Disponível em: https://joe.uobaghdad.edu.iq/index.php/main/article/view/876.. Acesso em: 22 jul. 2024.