Article | . 2017 Vol. 35, Issue. 5
Extension of Ginger Shelf-Life Using a Forced Evaporation Humidifier

Korea Food Research Institute1

2017.. 555:567


An above-ground, pilot storage facility (15 m2) that utilizes a forced evaporation humidifier was developed, and its performance was evaluated for long-term storage of gingers. The forced evaporation humidifier was able to evenly maintain the temperature of the storage space at 12± 1°C with 95-99% relative humidity without condensation. Weight loss occurred in all treatment groups using forced humidification during 12 months of storage. Groups with polypropylene bag packing lost 12–15% of their weight, which was lower than that lost by the group loaded onto plastic crates (22–32%). After four months of storage, a control group treated with ultrasonic humidification was terminated because of its high rotting rate (84–88%). In contrast, rotting rates of all the forced evaporation humidifier treatment groups was <17% after 12 months of storage, Which was significantly lower than that for gingers stored in underground caves with about 30% losing rates that have environments that are difficult to control. Lightness (L) and yellowness (b) values and the hardness of ginger peels decreased with storage time, while values for cross sections of flesh remained similar or decreased slightly compared to initial values. While free sugar content gradually declined with storage time, b values remained similar to the initial b values observed in the present study, this suggests that the reduction in free sugar content had no significant effect on ginger browning. Therefore, we conclude that if gingers are stored in an above-ground storage facility capable of maintaining optimal humidity with a forced evaporation humidifier and are cured prior to packing into bags, the storage period can be effectively extended, and that this storage system could replace the existing underground cave storage method.

1. Andrews LS (1995) Chemical and microbial quality of irradiated ground ginger. J Food Sci 60:829-832. doi:10.1111/j.1365-2621.1995.tb06240.x  

2. Babsky NE, Toribio JL, Lozano JE (1986) Influence of storage on the composition of clarified apple juice concentrate. J Food Sci 51:564-567. doi:10.1111/j.1365-2621.1986.tb13879.x  

3. Chang MS and Kim GH (2015) Combined effect of hot water dipping and vacuum packaging for maintaining the postharvest quality of peeled taro. Hortic Environ Biotechnol 56:662-668. doi:10.1007/s13580-015-0018-0  

4. Chen C, Hu W, Zhang R, Jiang A, Zou Y (2016) Levels of phenolic compounds, antioxidant capacity, and microbial counts of fresh-cut onions after treatment with a combination of nisin and citric acid. Hortic Environ Biotechnol 57:266-273. dio:10.1007/s13580-016-0032-x  

5. Choi MS, Kim DH, Lee KH, Lee YC (2002) Effects of additives on quality attributes of minced ginger during refrigerated storage.Korean J Food Sci Technol 34:1048-1056  

6. Choi YH, Lee SB, Kim MS (1997) Improvement of quality and prolongation in chopped ginger storage. Korean J Agric Chem Biotechnol 40:123-127  

7. Choi YH, Kim MS (2001) Effects of CO2 absorbent in the PE film bag and styrofoam box during the ginger storage. Korean JPostharvest Sci Technol 8:286-290  

8. Chung HS, Lee HJ, Moon KD (2010) Effect of ethylene absorbent on quality changes of fresh ginger rhizomes during modified atmosphere storage. Korean J Hortic Sci Technol 28:82-88  

9. Chung HS, Lee HJ, Seong JH, Moon KD (2009) Effect of heat pretreatment on the quality under storage of fresh ginger rhizomes.Korean J Food Preserv 16:623-628  

10. Chung TY, Jeong MC, Namgung B, Lee SE. (1999) Effect of pre-treatment methods on the quality of ginger during storage. Korean JPostharvest Sci Technol 6:1-6  

11. Chung TY, Lee SE, Jeong MC, Kim DC (1996) Studies on the pretreatment effect of ginger on long-term storage. Korean J Food SciTechnol 28:458-463  

12. Hyun DY, Kim KY, Choi IL, Kim SD, Park MS (1998) Change of stomatal behavior and chlorophyll fluorescence to environmental conditions in ginger (Zingiber officinale Rosc.). J Kor Soc Hortic Sci 39:145-148  

13. Jeong MC, Nahmgung B, Kim DM (1999) Effect of film thickness and moisture absorbing material on ginger quality during MA storage. Korean J Postharvest Sci Technol 6:264-269  

14. Jeong MC, Lee SE, Nahmgung B, Chung TY, Kim DC (1998a) Changes of quality in ginger according to storage conditions. Korean JPostharvest Sci Technol 5:224-230  

15. Jeong MC, Lee SE, Chung TY, Kim DC (1998b) CA storage for ginger depending on CO2 concentrations. Korean J Postharvest SciTechnol 5:135-139  

16. Jeong MC, Lee SE, Lee YC (1999a) Yield and quality of ginger extracts produced by enzymatic hydrolysis. Korean J Food Sci Technol 31:391-398  

17. Jeong MC, Jeong SW, Lee YC (1999b) Quality of ginger powder as affected by concentration and dehydration methods of ginger extracts. Korean J Food Sci Technol 31:1589-1595  

18. Kasmire RF, Cantwell M (1992) Postharvest handling systems: Underground vegetables (roots, tubers, and bulbs). In AA Kader, ed,Postharvest Technology of Horticultural Crops. Univ. of California, Div. of Agriculture and Natural Resources, CA, USA, p 271 Div. of Agriculture and Natural Resources, p. 271   

19. Kim DH, Lee YC (2004) Quality changes in minced ginger prepared with frozen ginger during storage. Korean J Food Sci Technol 36:943-951  

20. Kim HS, Choi JH, Lee HJ, Jeong MC, Kim BS, Kim DM (2010) Quality characteristics of treated with mild heat and minced ginger during storage. Korea J Food Preserv 17:784-792  

21. Lee HS, Kwon KH, Kim BS, Kim JH, Cha HS, Chung KH (2010a) Optimization of the molecular press dehydration method for ginger using response surface methodology. Korean J Food Sci Technol 42:398-406  

22. Lee MH, Lee KH, Kim KT (2011) Quality properties of peeled ginger by controlled atmosphere (CA) storage. J Food Hyg Saf 26:342-348  

23. Lee MH, Lee YK, Kim KT. (2010b) Quality characteristics of minced ginger during storage. Korean J Food Preserv 17:23-29  

24. Lim HS, Kim H, Bae GR, Kim DH (1998) Healty hazards occurred in the underground storing places of ginger roots. Korean J of Rural Med 23:251-258  

25. Mukherjee PK, Thomas P, Raghu K (1995) Shelf-life enhancement of fresh ginger rhizomes at ambient temperatures by combination of gamma-irradiation, biocontrol and closed polyethylene bag storage. Ann Appl Biol 127:375-384. doi:10.1111/j.1744-7348.1995.tb06681.x   

26. Ministry of Agriculture, Food and Rural Affairs (MAFRA) (2015)  

27. Okwuowulu EOPA, Nnodu EC (1998) Some effects of pre-storage chemical treatments and age at harvesting on the storability of fresh ginger rhizomes. Trop Sci 28:123-125  

28. Park YH, Park SJ, Han GJ, Cheo JS, Lee JY, Kang MS (2012) Quality characteristics of pre-processed garlic during storage according to storage temperature. J Korean Soc Food Sci Nutr 41:994-1001. doi:10.3746/jkfn.2012.41.7.994  

29. Paull RE, Chen NJ, Goo TTC (1988) Control of weight loss and sprouting of rhizome in storage. HortScience 23:734-736  

30. Picha DH (1987) Chilling injury, respiration, and sugar changes in sweet potatoes stored at low temperatures. J Am Soc Hortic Sci 112:495-502  

31. Sung KC (2010) A study on the pharmaceutical characteristics and analysis of natural ginger extract. J Korean Oil Chem Soc 27:266-272  

32. Wu JJ (1994) Effects of gamma irradiation on the volatile compounds of ginger rhizome. J Agric Food Chem 42:2574-2577.doi:10.1021/jf00047a038  

33. Yusof N (1990) Sprout inhibition by gamma irradiation in fresh ginger. J Food Process Preserv 14:113-122. doi:10.1111/j.1745-4549.1990.tb00833