Separation and concentration of anthocyanins from jamun: an integrated process

Chandrasekhar, J. ; Raghavarao, K. S. M. S. (2015) Separation and concentration of anthocyanins from jamun: an integrated process Chemical Engineering Communications, 202 (10). pp. 1368-1379. ISSN 0098-6445

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Aqueous two-phase extraction (ATPE) was employed to separate sugars from the extract of jamun anthocyanins. Polyethylene glycol (PEG) 6000/magnesium sulfate (16.0/10.9%, w/w) was found to be the most suitable system for effective differential partitioning of anthocyanins and sugars during ATPE. Tie line length of 34.26% and volume ratio of 0.76 resulted in maximum partitioning of anthocyanins to the PEG-rich (top) phase (yield ~100.0%) and sugars to the salt-rich (bottom) phase (yield—72.9%). Multistage ATPE resulted in an increase in removal of sugars (by about 96.1%) with 91.9% yield of anthocyanins in the PEG-rich (top) phase. The phase forming polymer (PEG 6000) was successfully separated from anthocyanins employing organic-aqueous extraction. Integration of ATPE with membrane processes such as osmotic membrane distillation (OMD) and forward osmosis (FO) resulted in an increase in concentration of anthocyanins from 430.1 mg/L (7.8° Brix) to 790.3 mg/L (21° Brix) and 2890.3 mg/L (40° Brix), respectively. Evaluation of colorant properties confirmed that the anthocyanins extracted and concentrated employing ATPE followed by membrane processes (FO and OMD) are stable.

Item Type:Article
Source:Copyright of this article belongs to Taylor & Francis.
Keywords:Anthocyanins; Aqueous Two-Phase Extraction; Forward Osmosis; Osmotic Membrane Distillation; Process Integration
ID Code:104283
Deposited On:21 Dec 2017 11:56
Last Modified:21 Dec 2017 11:56

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