Modification of the chemico-physical properties of sewage sludge towards its application for agricultural purposes. Global Journals of Research in Engineering, [S. l.], v. 12, n. J1, p. 29–35, 2012. Disponível em: https://testing.engineeringresearch.org/index.php/GJRE/article/view/101244. Acesso em: 6 jun. 2026.