Data/hora: 11/06/2024 10:56:53

Provedor de dados: | 5
País: | France
Título: | Processing fish press waters using metallic and ceramic filtration
Autores: | Perez-galvez, Raul; Guadix, Emilia M.; Berge, Jean-pascal; Guadix, Antonio.
Data: | 2013-10
Ano: | 2013
Palavras-chave: | Membranes; Waste-water; Bioseparations; Filtration.
Resumo: | BACKGROUND  The press juices resulting from a compacting operation on fish by-products were subjected to a depuration treatment in order to reduce the high COD (120 g O2 L–1). The process included an initial de-particulation step by means of two metallic filter cartridges of 465 µm and 250 µm, followed by concentration with a 200 nm ultrafiltration ceramic membrane. The polishing efficiency of each unit was assessed in terms of COD and protein removal. RESULTS  Dead-end metallic filtration of the press waters reduced their suspended matter content by 28%, but achieved only 5.6% decrease in chemical oxygen demand (COD), which suggested further processing by membrane ultrafiltration. The de-particulated stream was then subjected to ultrafiltration for 8 h in batch concentration mode, attaining a COD reduction of 87%. The observed flux of permeate was successfully fitted to a cake-forming model adapted to cross-flow filtration. The permeability of the fouled membrane was completely restored (99.87%) by a cleaning treatment comprising an alkali step with NaOH and a final disinfection with NaOCl. CONCLUSIONS  The treatment proposed has proved to be a feasible technology, able to render a final permeate with reduced organic load. © 2013 Society of Chemical Industry
Tipo: | Text
Idioma: | Inglês

Identificador:

http://archimer.ifremer.fr/doc/00156/26701/24791.pdf

DOI:10.1002/jctb.4043

Editor: | Wiley-blackwell
Relação: | http://archimer.ifremer.fr/doc/00156/26701/
Formato: | application/pdf
Fonte: | Journal Of Chemical Technology And Biotechnology (0268-2575) (Wiley-blackwell), 2013-10 , Vol. 88 , N. 10 , P. 1885-1890
Fonte: | 2013 Society of Chemical Industry