BIBLIOGRAFIA Acesso 13/04/2019 https://www.sciencedirect.com/science/article/pii/B9788535259544500241 https://www.sciencedirect.com/science/article/pii/B9788535259544500198 https://www.sciencedirect.com/science/article/pii/B9788535259544500241 http://www.scielo.br/pdf/esa/v21n2/1809-4457-esa-21-02-00387.pdf http://www.scielo.br/pdf/esa/v17n3/v17n3a05 http://www.ersar.pt/pt/site-comunicacao/site-noticias/documents/ct5-trataguasresiduais.pdf