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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; Chopin, Christine; Mastail, Max; Ragon, Jean-yves; Guadix, Antonio; Berge, Jean-pascal. |
| Fresh sardine (employed as discard model species) was pressed with a hydraulic press in order to obtain a partially dewatered cake (whose volume represents between 55% and 60% of the initial Volume of raw material) and a 3-phase press liquor comprising an aqueous fraction, an oil fraction and a variable amount of suspended solids. Pressing conditions, such as final pressure to which the sardine was subjected, compression speed, number of pressing stages and time of relaxation between two consecutive pressing stages, were optimised by means of a statistically designed experiment. The goal of the optimisation problem was to achieve maximal yield of press liquor with a minimum load of suspended solids. The Suspended solid content in the press liquor Must be... |
| Tipo: Text |
Palavras-chave: Multiobjective optimisation; Response surface methodology; Hydraulic pressing; Fish discards; Sardine. |
| Ano: 2009 |
URL: http://archimer.ifremer.fr/doc/2009/publication-7415.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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