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Optimisation of liquor yield during the hydraulic pressing of sardine (Sardina pilchardus) discards ArchiMer
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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Enzymatic technology to improve oil extraction from Caryocar brasiliense camb. (Pequi) Pulp. Rev. Bras. Frutic.
Mariano,Renata Gomes de Brito; Couri,Sonia; Freitas,Suely Pereira.
The present study aims to compare yield and quality of pequi pulp oil when applying two distinct processes: in the first, pulp drying in a tray dryer at 60ºC was combined with enzymatic treatment and pressing to oil extraction; in the second, a simple process was carried out by combining sun-drying pulp and pressing. In this study, raw pequi fruits were collected in Mato Grosso State, Brazil. The fruits were autoclaved at 121ºC and stored under refrigeration. An enzymatic extract with pectinase and CMCase activities was used for hydrolysis of pequi pulp, prior to oil extraction. The oil extractions were carried out by hydraulic pressing, with or without enzymatic incubation. The oil content in the pequi pulp (45% w/w) and the physicochemical characteristic...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Caryocar brasiliense; Sun drying; Hydraulic pressing; Oil quality index.
Ano: 2009 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-29452009000300003
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