Korean Chemical Engineering Research

The Korean Institute of Chemical Engineers (한국화학공학회)
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Optimization of Hot-water Extraction Conditions of Bioactive Compounds from Coffee Residue Extracts

커피박으로부터 생리활성물질 생산 증대를 위한 열수추출 공정 개발

  • Jo, JaeMin (Department of Food Science, Sunmoon University) ;
  • Kim, SeungKi (Department of Food Science, Sunmoon University) ;
  • Min, Bora (Department of Food Science, Sunmoon University) ;
  • Jung, HyunJin (Department of Food Science, Sunmoon University) ;
  • Han, Yeojung (Department of Food Science, Sunmoon University) ;
  • Kim, JinWoo (Department of Food Science, Sunmoon University)
  • Received : 2016.12.30
  • Accepted : 2017.03.03
  • Published : 2017.06.01
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Abstract

In this study, the optimization of extraction parameters (solvent, temperature, time, solvent concentration) for the maximization of polyphenol extraction was performed to produce value-added food and cosmetic additives using a byproduct of coffee extraction process (coffee residue). All of the extraction parameters evaluated in this experiment had significant effects on polyphenol extraction and the results showed the effect of NaOH concentration on the polyphenol production was most significant among tested parameters. Especially, hot water extraction using acid or base was effective rather than hot-water extraction and the addition of 0.1 mol of NaOH increased 1.5 times extraction concentration compared with hot-water extraction using distilled water. It was found that hot-water extraction with NaOH was more effective than hot-water extraction, and 36.5 mg GAE/g DM was obtained under optimum condition of $100^{\circ}C$, 2 mol of NaOH and 30 min. This result was 2.9 times higher than that of 12.5 mg GAE/g DM obtained from the hot-water extraction before optimization. Thus, coffee residue could be used for food and cosmetic industry as a high-value additive such as antioxidant.

커피침출 공정의 부산물인 커피박을 이용한 고부가가치 식품 및 화장품 소재 생산을 위해 열수추출 공정의 폴리페놀 추출인자(용매, 온도, 시간, 농도) 최적화를 수행하였다. 실험에 적용 된 모든 추출인자가 폴리페놀 생산에 유의한 효과가 있음을 확인할 수 있었고 NaOH 농도가 폴리페놀 생산에 미치는 효과가 가장 큰 것으로 평가되었다. 특히, 열수추출 보다는 산 또는 염기를 이용한 열수추출이 폴리페놀 추출 효과가 높았으며 NaOH 0.1 mol 첨가 시 증류수를 이용한 열수추출에 비해 1.5배 추출 효과가 증가하여 열수를 이용한 추출에 비해 염기-열수 추출이 보다 효과적임을 알 수 있었다. 폴리페놀 추출의 최적 조건인 $100^{\circ}C$, 2 mol NaOH와 30 min 추출 조건에서 36.5 mg GAE/g DM를 얻을 수 있었다. 이는 최적화 이전의 열수추출에서 얻은 12.5 mg GAE/g DM 대비 2.9배 증가된 결과로 커피박은 항산화 활성 등 기능성 강화 소재로 식품 및 화장품 산업에 활용이 가능할 것으로 판단된다.

Keywords

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