Nanofiltration of concentrated and salted tuna cooking juices |
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| Authors: | K Walha R Ben Amar P Bourseau P Jaouen |
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| Institution: | 1. Agrarian Technological Institute of Castilla and Leon (ITACyL), Junta de Castilla y León, Consejería de Agricultura y Ganadería, Finca Zamadueñas, Ctra. Burgos, Km 119, 47071 Valladolid, Spain;2. Technical University of Denmark, National Food Institute, Division of Industrial Food Research, Søltoft Plads, Building 221, 2800 Kgs Lyngby, Denmark;1. State Key Laboratory of Satellite Ocean Environment Dynamics, Second Institute of Oceanography, State Oceanic Administration, 36 Bochubeilu, Hangzhou 310012, China;2. Zhejiang University, Hangzhou 310028, China;1. IEM (Institut Européen des Membranes), UMR 5635 (CNRS-ENSCM-UM2), Université Montpellier 2, Place E. Bataillon, F-34095 Montpellier, France;2. Laboratory of Materials Science and Environment, University of Sfax, Faculty of Science of Sfax, Route de la Soukra Km 3.5, BP 1171, Sfax 3000, Tunisia |
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| Abstract: | Tuna cooking juice from a Tunisian tuna-processing unit has a high level of polluting load: chemical oxygen demand (COD) is comprised between 4 and 20 g L−1, nitrogen kjedahl (NK) between 0.6 and 3 g L−1 and dry matter between 120 and 160 g L−1. The juice has thus to be treated before being rejected into the environment. This paper considers the nanofiltration (NF) of these concentrated organic/inorganic mixtures using an AFC 30 (NF) membrane. The work focusses on the effect of organic and inorganic matters on the permeate flux and rejections of these matters. For this purpose, mixtures of salt and organic pollution (COD), used as model solutions, were prepared by the dilution of a typical industrial tuna cooking juice. The permeate flux was found to decrease when salt and organic matter concentrations increase. The recovery rate in organic matter decreases with increasing salt or organic matter content and the recovery rate of salt decreases when the COD concentration increases. |
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| Keywords: | Nanofiltration Tuna cooking juice Organic/inorganic matters retention |
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