Solids Extraction of Cod Frame and Effects on Ultrafiltration of the Aqueous Extract |
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Authors: | M.T. RODRIGUEZ-ESTRADA S. CHUNG P. CHINACHOTI |
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Affiliation: | The authors are affiliated with the Dept. of Food Science, Univ. of Massachusetts, Amherst, MA, 01003. |
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Abstract: | Grinding, pH adjustment, heat treatment and centrifugation were studied to recover solids from ground cod frames and to apply ultrafiltration (UF) to the resulting aqueous phase. Early heat treatment (90°C/20 min) dissolved collagen into aqueous phase resulting in a very low UF flux. A pH adjustment to 4.5 after grinding (~0.32 cm die), with no heat resulted in efficient separation after centrifuging. UF of the aqueous phase showed an increase in initial flux (23 L/hr m2). However, when the same aqueous material was heated and then centrifuged (1–2% solids removed), UF flux was further increased to 46 L/hr m2and this process gave highest solids recovery (90%). |
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Keywords: | cod fish frame ultrafiltration solids extraction |
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