Qi X, Liao E, Zhao K, Regenstein JM, Mao X. Multi-stage countercurrent process for extracting protein from Antarctic Krill (
Euphausia superba).
JOURNAL OF FOOD SCIENCE AND TECHNOLOGY 2018;
55:4450-4457. [PMID:
30333641 PMCID:
PMC6170336 DOI:
10.1007/s13197-018-3368-7]
[Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Revised: 09/18/2017] [Accepted: 07/30/2018] [Indexed: 10/28/2022]
Abstract
To systematically study multi-stage countercurrent process for Antarctic krill protein extracting and to optimize the multi-stage countercurrent technology, the solubility of Antarctic krill proteins after multi-step dissolution was explored firstly; multi-step extraction was investigated; and then multi-stage countercurrent system for protein extraction was carried out. In single step extraction, krill-to-water ratio and pH were chosen as 1:10 and 12.5 respectively, in order to extract more protein. In the multi-step dissolution process, the protein solubility of aqueous solution at pH 12.5 was 33.0 ± 0.8 mg/mL. Multi-step cross-flow processing testified the feasibility of multi-stage countercurrent assumption. Three-stage countercurrent method using krill-to-water ratio 1:10 extracted, 95.1 ± 0.6% protein from krill, where almost the same water as previous works. The total recovery yield of 67.9 ± 1.6% was achieved after precipitation at pH 4.5.
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