Quantification of biomolecules in herring (Clupea harengus) industry processing waters and their recovery using electroflocculation and ultrafiltration
Artikel i vetenskaplig tidskrift, 2015

Abstract Four types of herring industry processing waters; refrigerated sea water (RSW), storage water (SW), processing water from cutting (PW) and pre-salting brines (SB) were subjected to chemical characterization and biomolecule recovery using electroflocculation (EF) and ultrafiltration (UF). The highest protein and fatty acid content were found in SB´s, up to 12.7±0.3 and 2.5±0.1 g L-1, respectively. Long chain n-3 polyunsaturated fatty acids represented up to 44.5% of total fatty acids. In all samples, leucine and glutamic acid/glutamine were the dominating amino acids whilst calcium and magnesium were the dominating trace elements. EF plus UF in series recovered up to 80% proteins and fatty acids from SB´s and reduced chemical oxygen demand by 70%. Foaming and emulsifying properties of biomolecules were improved or unaffected by EF/UF treatment. To conclude, large amounts of biomass are currently lost per tonne of processed herring, e.g. ~9.2 kg pure proteins and ~4.1 kg fatty acids; EF/UF represents a promising way of turning such losses to a potential income.

Keywords: Herring

processing waters

fatty acids.






Clupea harengus


Ali Osman

Chalmers, Biologi och bioteknik, Livsmedelsvetenskap

Nina Gringer

Danmarks Tekniske Universitet (DTU)

Tore Svendsen

Lin Feng Yuan

Seyed Vali Hesseini

Chalmers, Biologi och bioteknik, Livsmedelsvetenskap

Caroline P. Baron

Danmarks Tekniske Universitet (DTU)

Ingrid Undeland

Chalmers, Biologi och bioteknik, Livsmedelsvetenskap

Food and Bioproducts Processing: Transactions of the Institution of of Chemical Engineers, Part C

0960-3085 (ISSN) 1744-3571 (eISSN)

Vol. 96 198-210



Livsvetenskaper och teknik (2010-2018)


Biologiska vetenskaper

Bioteknologi med applikationer på växter och djur



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