Sterilization of Gochujang Sauce with Continuous Ohmic Hea

연속 옴가열 장치를 이용한 고추장 소스의 살균

  • Choi, Jun-Bong (Graduate School of Hotel & Tourism, The University of Suwon) ;
  • Cho, Won-Il (CJ Foods R&D, CJ Cheiljedang Corporation) ;
  • Jung, Jung-Yoon (Department of Food Science and Engineering, Ewha Womans University) ;
  • Chung, Myong-Soo (Department of Food Science and Engineering, Ewha Womans University)
  • 최준봉 (수원대학교 호텔관광대학원) ;
  • 조원일 (씨제이제일제당(주) 식품연구소) ;
  • 정정윤 (이화여자대학교 식품공학과) ;
  • 정명수 (이화여자대학교 식품공학과)
  • Received : 2015.05.29
  • Accepted : 2015.07.26
  • Published : 2015.08.31


In this study, five different Gochujang (a traditional Korean sauce prepared using fermented red pepper paste) sauces were heated at $100^{\circ}C$ for 5 min using a continuous ohmic heating system. Ohmic heating yielded greater reduction in microbial counts (90-95% reduction) than did conventional heating (65-75% reduction). The sterilization effect of the continuous ohmic heater increased with increasing sample flow rate and decreasing Reynolds number inside the pipe. Low-viscosity samples had higher electrical conductivity and were better suited for ohmic heating than were high-viscosity samples. The color and texture were also satisfactorily maintained after ohmic heating. Compared with conventional heating, ohmic heating provided rapid and uniform heating, which is more suitable for aseptic thermal processing of viscous foods.


  1. Kim MS, Kim IW, Oh JA, Shin DH. Quality changes of traditional kochujang prepared with different meju and red pepper during fermentation. Korean J. Food Sci. Technol. 30: 924-933 (1998)
  2. Cho WI, Kim DU, Kim YS, Pyun YR. Ohmic heating characteristics of fermented soybean paste and kochujang. Korean J. Food Sci. Technol. 26: 791-798 (1994)
  3. Kim DH, Kwon YM. Effect of storage conditions on the microbiological and physicochemical characteristics of traditional kochujang. Korean J. Food Sci. Technol. 33: 589-595 (2001)
  4. Kim DH, Yook HS, Youn KC, Sohn CB, Byun MW. Changes of microbiological and general quality characteristics of gamma irradiated kochujang (fermented hot pepper paste). Korean J. Food Sci. Technol. 33: 72-77 (2001)
  5. Lim SB, Jwa MK, Mok CK, Park YS. Quality changes in kochujang treated with high hydrostatic pressure. Korean J. Food Sci. Technol. 33: 444-450 (2001)
  6. Sastry SK, Palaniappan S. Mathematical modeling and experimental studies on ohmic heating of liquid-particle mixtures in a static heater. J Food Process Eng. 15: 241-261 (1992)
  7. Sarang S, Sastry SK, Knipe L. Electrical conductivity of fruits and meats during ohmic heating. J. Food Eng. 87: 351-356 (2008)
  8. Cho HY, Yousef AE, Sastry SK. Kinetics of inactivation of Bacillus subtilis spores by continuous or intermittent ohmic and conventional heating. Biotechnol. Bioeng. 62: 368-372 (1999)<368::AID-BIT14>3.0.CO;2-0
  9. Yoon SW, Lee CYJ, Kim KM, Lee CH. Leakage of cellular materials from Saccharomyces cerevisiae by ohmic heating. J. Microbiol. Biotechnol. 12: 183-188 (2002)
  10. Marcotte M, Trigui M, Ramaswamy S. Effect of salt and citric acid on electrical conductivities and ohmic heating of viscous liquids. J. Food Process. Pres. 24: 389-406 (2000)
  11. Jun SJ, Sastry S. Modeling and optimization of ohmic heating of foods inside a flexible package. J. Food Process Eng. 28: 417-436 (2005)
  12. Kim YC, Yoo BS. Rheological properties of traditional kochujang. Korean J. Food Sci. Technol. 32: 1313-1318 (2000)
  13. Ayadi MA, Leuliet JC, Chopard F, Berthou M, Lebouche M. Continuous ohmic heating unit under whey protein fouling. Innov. Food Sci. Emerg. 5: 465-473 (2004)
  14. Palaniappan S, Sastry SK. Electrical conductivities of selected solid foods during ohmic heating. J. Food Process Eng. 14: 221-236 (1991)