Subject Area物理化学
Optimization and scale-up of a new agar extraction from red seaweed
Li HY(李海燕); Zhang W(张卫)
Conference Name13th International Biotechnology Symposium and Exhibition
Conference Date2008-10-12
Conference Place中国
Funding Organization中国科学院,中国工程院,中国教育部,中国科技部,中国国家发改委
AbstractThe commercial mariculture of Gracilaria lemaneiformis has been leading in China, because of their fast growing ability, higher adaptability, uses as aquaculture-bioremediator and for the higher concentration of agar–agar (Zhou et al., 2006). Besides food and agar-industry, the abundant availability of cultured algae needs other potential andmore prospective markets.Aneco-friendly photobleaching extraction process for the agar extraction from the red algae Gracilaria lemaneiformis was developed for the benefit of workers’ health and environmental safety (Li et al., 2008). The current study reported the optimization of key process parameters (alkali modification concentration, photobleaching duration, algal length and screen filter opening size) in order to scale up this new technique. And a 20 L agar extraction reactor was thus constructed and the scale-up of this agar extraction processwas tested in six-batch experiments. The optimal conditions were found to be modification by 3–5% NaOH, photobleaching for 5 h, using 2–4cm length of algae and the 6 m opening filter screen. The resulted agar quality was similar to that of the laboratory-scale extraction. In addition, batch-to-batch reproducibility was excellent. The agar yield and gel strength for 5% NaOH modified agar were 26.8% and 1897gcm−2, while those for 3% NaOH modified agar were 28.2% and 1287 g cm−2, respectively. The results demonstrate excellent scale-up ability and potential application of this new photobleaching agar extraction process at commercial scale. And it is clear that the agar yield and quality can be manipulated through the alkali modification in this new eco-friendly extraction as per the market demands.
WOS IDWOS:000208979402298
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Document Type会议论文
Corresponding AuthorZhang W(张卫)
Recommended Citation
GB/T 7714
Li HY,Zhang W. Optimization and scale-up of a new agar extraction from red seaweed[C],2008:S569/2.
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