Albuquerque Soares, Haroldo Sávio, Fabiana Rocha Pinto, David Barbosa de Alencar, and Manoel Henrique Reis Nascimento. “PH Analysis of an Wastewater Treatment Plants (WWTP) in a Paper Recycling Industry”. International Journal for Innovation Education and Research 7, no. 11 (November 1, 2019): 1062–1069. Accessed May 16, 2024. https://scholarsjournal.net/index.php/ijier/article/view/1967.