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- Title
Multistage recovery process of seaweed pigments: Investigation of ultrasound assisted extraction and ultra-filtration performances.
- Authors
Zhenzhou Zhu; Qian Wu; Xiaohui Di; Shuyi Li; Barba, Francisco J.; Koubaa, Mohamed; Roohinejad, Shahin; Xingao Xiong; Jingren He
- Abstract
The objectives of this study were first to evaluate the performance of seaweed pigments' recovery through ultrasound assisted extraction (UAE) and ultra-filtration (UF), and second to investigate the membrane fouling mechanism and evidence the threshold flux during filtration. The pigments' recovery from the extract was performed using 5 kDa and lOkDa ultra-filtration membranes. Results showed that increasing the extraction temperature in the range of 40-60 °C was proportional to chlorophyll extraction efficiency, while the maximal carotenoid yield was achieved at 50 C. Ultrasonic power (from 100 W to 300 W) facilitated the extraction of both chlorophylls and carotenoids. Results from ultra-filtration showed that most pigments (>90%) were available in permeate through 10 kDa membrane, while 5 kDa membrane partially retained the pigments. Filtration resistance was quantified with resistance-in-series' model, showing that the cake layer was the most important fouling resistance during filtration. Threshold flux at different rotation speeds (200 and 600 rpm) was determined by trans-membrane pressure stepping tests, which were around 10 and 14.5 L/m² h, respectively. Results from this study demonstrated the efficiency of the multistage process involving UAE and UF to enhance the recovery of pigments from brown seaweeds.
- Subjects
MARINE algae; ALGAL pigments; ULTRAFILTRATION; MEMBRANE separation; CHLOROPHYLL; FOULING; CAROTENOIDS
- Publication
Food & Bioproducts Processing: Transactions of the Institution of Chemical Engineers Part C, 2017, Vol 104, p40
- ISSN
0960-3085
- Publication type
Article
- DOI
10.1016/j.fbp.2017.04.008