Recovery of a protein-rich biomass from shrimp (Pandalus borealis) boiling water: A colloidal study
Journal article, 2020

Flocculation and sedimentation of a protein-rich biomass from shrimp boiling water (SBW) using food grade polysaccharides (carrageenan, alginate and carboxymethyl cellulose (CMC)) as flocculants was investigated at different pH-values. The effect of flocculant concentration on particle size and viscosity of SBW was also evaluated. Flocculation with carrageenan (0.45 g/L) at pH = 4 exhibited the most efficient protein sedimentation; protein concentration of the upper phase was here reduced by 77%, allowing 86% protein to be sedimented from SBW. Flocculation by alginate and CMC at pH = 4 showed 67% and 60% protein reduction of the upper phase at concentrations of 0.5 and 0.2 g/L, respectively. Contrary to alginate and CMC, carrageenan concentration affected the size distribution of flocs. Finally, carrageenan at 0.45 g/L and pH = 4 was successfully tested in a scaled up trial (5L) providing 78.5% protein recovery and a biomass with 75% protein on dry weight basis.

Shrimp boiling water Protein Biomass recovery Flocculation Waste water Polyelectrolyte Polysaccharide

Author

Bita Forghani Targhi

Chalmers, Biology and Biological Engineering, Food and Nutrition Science

Anna Ström

Chalmers, Chemistry and Chemical Engineering, Applied Chemistry

Romain Bordes

Chalmers, Chemistry and Chemical Engineering, Applied Chemistry

Ingrid Undeland

Chalmers, Biology and Biological Engineering, Food and Nutrition Science

Food Chemistry

0308-8146 (ISSN)

Vol. 302 125299-

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Subject Categories

Food Science

More information

Latest update

1/17/2020