Journal of Korean Society of Environmental Engineers (대한환경공학회지)

Korean Society of Environmental Engineers (대한환경공학회)
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Effect of Reducing the Odor of Food Wastes Using Effective Microorganism (EM)

유용미생물을 활용한 음식물쓰레기의 악취저감 효과

  • Kim, Ha-Na (Department of Environmental Engineering, Daejeon University) ;
  • Yim, Bongbeen (Department of Environmental Engineering, Daejeon University) ;
  • Kim, Sun-Tae (Department of Environmental Engineering, Daejeon University)
  • Received : 2016.01.25
  • Accepted : 2016.03.09
  • Published : 2016.04.30
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Abstract

The aim was to investigate the effect of reducing the odorous and complex odor released during the decomposition of food wastes using effective microorganism (EM) as a function of time at $20^{\circ}C$ and $35^{\circ}C$. The variation of total microbial counts and dominant species counts in EM and leachate produced during food wastes decomposition was also observed. In general, the cumulative concentration of sulfur compounds ($H_2S$, $CH_3SH$) and complex odor released during food wastes decomposition increased with increasing elapsed time. The nitrogen compounds ($NH_3$, trimethyl amine), however, was not observed in all samples. The addition of EM in food wastes resulted in the reduction of concentration of sulfur compounds and complex odor, in spite of the increase of $CH_3CHO$ concentration. The dominant microbial species detected in EM were Lactobacillus species(Lactobacillus rhamnosus and Lactobacillus casei). In the leachate produced during food wastes decomposition, however, the various microbial community alternative to that detected in EM was observed. The EM could be potentially useful as a tools for reducing odor induced from the food waste decomposition process.

음식물쓰레기 부패과정에서 발생되는 대표적인 S계(황화수소($H_2S$), 메틸멜캅탄($CH_3SH$)), N계(암모니아($NH_3$), trimethyl amine) 악취물질과 복합악취를 경과시간에 따라 측정하고, 유용미생물(effective microorganism, EM) 사용에 따른 악취 저감효과의 평가 및 EM제의 미생물상 및 세균수의 변화와 악취물질 농도 저감과의 관계를 조사하였다. 음식물쓰레기에서 발생하는 악취는 N 계열에 비하여 S계 악취물질의 영향이 더 큰 것으로 나타났다. S계 악취물질과 복합악취의 경우 대조군에 비하여 EM제를 사용한 실험군에서 발생농도가 낮게 나타나 EM제의 도포에 의한 악취 저감효과를 확인할 수 있었다. 그러나 아세트알데히드($CH_3CHO$)의 경우 EM제 도포 후 경과시간이 증가할수록 발생농도는 감소되지 않았다. EM제와 음식물쓰레기 부패시 발생하는 침출수의 미생물을 분석한 결과, 대부분 유산균 군집으로 확인되었으며, EM제 원액과 실험군에서 발생한 침출수의 미생물 군집이 다르게 나타났다.

Keywords

References

  1. Kim, D. W., "A study on the odor reduction of food waste and by microorganisms," Master's Thesis, Hoseo University, Chungnam(2005).
  2. Kwon, B., Na, S., Lim, H., Lim, C. and Chung, S., "Slurry phace decomposition of food waste by using various microorganisms," J. Korean Soc. Environ. Eng., 36(5), 303-310(2014). https://doi.org/10.4491/KSEE.2014.36.5.303
  3. Hong, K. H., Cha, J. D., Ko, Y. H., Lee, J. H., Lim, E. J. and Kim, K. S., "Evaluation of odor concentration for food waste compost facility," Korean J. Odor Res. Eng., 5(3), 151-155(2006).
  4. Choi, H. J., "The malodor deodorizing effect of EM (effective microorganism) in food garbage," Master's Thesis, Daegu University, Gyeongbuk(2011).
  5. Kim, J. G., Song, H. I., Kim, B. R. and Kwon, G. A., "A study on emission characteristics of odor in food waste treatment facilities," In proceeding of the 49the meeting of Korean Society for Atmospheric Environment, Kunsan University, Kunsan, pp. 495-496(2009).
  6. Jo, S. H., Kim, K. H., Jo, H. J., Lee, M. H., and Kim, Y. H., "Changes in odorant emission patterns of boiled egg samples between fresh and decayed stages," Korean J. Odor Res. Eng., 11(2), 151-155(2012). https://doi.org/10.11161/jkosore.2012.11.4.151
  7. Jung, J. E., Song, B. J., and Jung, S. R., "Removal of malodorous compounds from foodwaste treatment processing(II)," Rep. Busan Inst. Health & Environ., 13, 17-47(2003).
  8. Kim, K. H., Kim, Y. H., Im, M. S., Park, S. Y., Hong, Y. J. and Choi, B. S., "Characterization of malodor release from decaying foods and tactics for odor control through microbial treatment," J. Korean Soc. Environ. Anal., 9(2), 74-83(2006).
  9. Hong, O. F. and Kim, K. H., "The emission characteristics of reduced sulfur compounds in relation to food decay," Korean J. Odor Res. Eng., 8(1), 12-19(2009).
  10. Moon, Y. H., Lee, K. B., Kim, Y. J. and Koo, Y. M., "Current status of EM (effective microorganisms) utilization," Korean Soc. Biotech. Bioeng. J., 26(5), 365-373(2011).
  11. Kang, K. H., Kam, S. K., Hu, C. G. and Lee, M. G., "Comparison of reduction effect of contaminants and odor according to DO change and EM addition in maturation process of piggery slurry," J. Environ. Sci., 15(6), 563-569(2006).
  12. Lee, J. H., Joeng, J. O. and Park, S. H., "A study on the composting process of food waste by seeding the isolated effective microorganism," J. Environ. Hith. Soc., 26(3), 1-10(2000).
  13. Ko, S. C., Song, Y. C. and Kim, I. S., "Efficient treatment of food wastes by EM (effective microorganisms) and their recycling," J. Korean Solid Wastes. Eng. Soc., 14(7), 729-740(1997).
  14. Roh, S. H. and Kim, S. I., "The effect of effective microorganisms on biological nutrient removal in SBR process," J. Korean Ind. Eng. Chem., 10(1), 369-372(2006).
  15. Lee, Y. H., "Environmental purification using effective microorganisms," Master's Thesis, Kyungsung University, Busan (2004).
  16. Park, S. J., Kim, H. K., Lee, M. Y., Kil, K. B. and Hwang, J. B., "Experimental on the odor removal emitted from sewer using microbial deodorants," Proc. Korean J. Odor Res. Eng., pp. 35-37(2010).
  17. Chen, S. J., Hsieh, L, T., Hwang, W. I., Xu, H. C. and Kao, J. H., "Abatement of odor emissions from landfills using natural effective microorganism enzyme," Aerosol Air Qual. Res., 3, 87-99(2003). https://doi.org/10.4209/aaqr.2003.06.0009
  18. Ministry of Environment, "Odor analysis method in South Korea," pp. 29-45(2014).

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