FN Archimer Export Format PT J TI Processing fish press waters using metallic and ceramic filtration BT AF PEREZ-GALVEZ, Raul GUADIX, Emilia M. BERGE, Jean-Pascal GUADIX, Antonio AS 1:1;2:1;3:2;4:1; FF 1:;2:;3:PDG-RBE-BRM-STBM;4:; C1 Univ Granada, Dept Ingn Quim, E-18071 Granada, Spain. IFREMER, Lab Sci & Technol Biomasse Marine, F-44311 Nantes, France. C2 UNIV GRANADA, SPAIN IFREMER, FRANCE SI NANTES SE PDG-RBE-BRM-STBM IN WOS Ifremer jusqu'en 2018 copubli-europe IF 2.494 TC 1 UR https://archimer.ifremer.fr/doc/00156/26701/24791.pdf LA English DT Article DE ;membranes;waste-water;bioseparations;filtration AB 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 PY 2013 PD OCT SO Journal Of Chemical Technology And Biotechnology SN 0268-2575 PU Wiley-blackwell VL 88 IS 10 UT 000326243900011 BP 1885 EP 1890 DI 10.1002/jctb.4043 ID 26701 ER EF