화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Korean Journal of Chemical Engineering, Vol.34, No.12, 3163-3169, December, 2017
DOI10.1007/s11814-017-0220-0  Export Citation
Introduction of alkali soaking and microwave drying processes to improve agar quality of Gracilaria verrucosa
Yong-Woon Kim, and Hyun-Jae Shin1, †
  • Department of Chemical Engineering, Graduate School of Chosun University, Pilmundaero 309, Dong-gu, Gwangju 61452, Korea
  • 1Department of Biochemical and Polymer Engineering, Chosun University, Pilmundaero 309, Dong-gu, Gwangju 61452, Korea
E-mail:
Gracilaria species produce agars with low quality due to their high sulfate concentrations. For this reason, the gel properties of many Gracilaria agars must be improved by appropriate processes. In this study, we developed an improved agar extraction process for Gracilaria verrucosa by alkali soaking extraction and microwave thawing and drying. Variables such as the seaweed to alkali volume ratio, extraction time, and alkali concentration were adjusted to optimize the yield and agar quality. The yield of the agar was maximized (34.5±0.6%) using 3% alkali concentration; the lowest yield (17.0±1.7%) was obtained with 1% alkali concentration. Agar gel strengths ranged from 462.0±7 to 627.3±11 g·cm-2. We have developed a process for quickly producing an agar gel through thawing and drying using microwave radiation. This study shows the possibility of producing a high-value agar using alkali soaking extraction methods for nonedible G. verrucosa.
Keywords:Gracilaria verrucosa;Agar;Alkali Soaking;Seaweed-alkali Solution Ratio;Microwave Drying
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