Utilize este identificador para referenciar este registo:
https://hdl.handle.net/10216/103994
Autor(es): | M. J. Ferreira M. F. Almeida S. Pinho A. Neves |
Título: | Alternative treatments for footwear industry liquid effluents part 1 - classical approach |
Data de publicação: | 2002 |
Resumo: | The footwear industry generates small volumes of non-biodegradable liquid effluents from finishing operations which have a high organic load, mainly due to pigments, organic acids and organic solvents. In consequence, these effluents must be treated to accomplish regulatory requirements before discharge. One of the treatment alternatives is coagulation/flocculation, a well-known treatment for removing fine particles and colloids. Tests carried out using lime, aluminum sulphate, ferric chloride and ferric sulphate as coagulants gave chemical oxygen demand (COD) and 5-day biochemical oxygen demand (BOD5) removals over 80-90 %. However, despite this efficiency, some of the effluent characteristics are still higher than those imposed for discharge to surface waters, land or sewage systems. A polishing step using activated carbon adsorption is then required to permit the discharge to sewage systems, but the quantities of adsorbent required casts some doubt on the feasibility of the process. |
Assunto: | Ciências Tecnológicas, Ciências da engenharia e tecnologias Technological sciences, Engineering and technology |
Áreas do conhecimento: | Ciências da engenharia e tecnologias Engineering and technology |
URI: | https://hdl.handle.net/10216/103994 |
Tipo de Documento: | Artigo em Revista Científica Internacional |
Condições de Acesso: | restrictedAccess |
Aparece nas coleções: | FEUP - Artigo em Revista Científica Internacional |
Ficheiros deste registo:
Ficheiro | Descrição | Tamanho | Formato | |
---|---|---|---|---|
183843.pdf Restricted Access | Texto original na revista | 253.71 kB | Adobe PDF | Request a copy from the Author(s) |
Todos os registos no repositório estão protegidos por leis de copyright, com todos os direitos reservados.