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Perez-galvez, Raul; Guadix, Emilia M.; Berge, Jean-pascal; Guadix, Antonio. |
This paper assesses the performance of three ceramic membranes of average pore size 50 nm, 200 nm and 1.4 tan in the treatment of the press liquor resulting from a compaction operation of sardine by-products. To this end, 2 L of pre-filtered press liquor with an average protein content of 44 g/L were filtered during 3 h through the three membranes assayed. Unexpectedly, the membrane of larger pore size, presented the lowest values for the flux of permeate at steady state at 20 L/(m(2) h), while its average protein rejection (77%) was similar to that observed in the membrane of 200 nm. This fact was attributed to the difference in material of its active layer (a-alumina instead of zirconite). The cleaning efficiency of the membranes was assessed by the COD... |
Tipo: Text |
Palavras-chave: Fish processing; Ceramic membranes; Ultrafiltration; Fouling; Cleaning. |
Ano: 2011 |
URL: http://archimer.ifremer.fr/doc/00052/16290/14084.pdf |
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Perez-galvez, Raul; Guadix, Emilia M.; Berge, Jean-pascal; Guadix, Antonio. |
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... |
Tipo: Text |
Palavras-chave: Membranes; Waste-water; Bioseparations; Filtration. |
Ano: 2013 |
URL: http://archimer.ifremer.fr/doc/00156/26701/24791.pdf |
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