Journal of Dairy Science and Biotechnology

Korean Society of Dairy Science and Biotechnology (한국낙농식품응용생물학회)
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Antibacterial Activity of Lactobacillus sakei on Microorganisms isolated from Chicken Manure

계분 유래 미생물에 대한 Lactobacillus sakei 의 항균활성

  • Park, Min-Ki (Major in Animal.Dairy Life Science, Graduate School of Future Convergence Technology, Hankyong National University) ;
  • Jeong, Jong-Seong (RiceTeck Inc.) ;
  • Kim, Woan-Sub (Dept. of Animal Life and Enviromental Science, Hankyong National University)
  • 박민기 (한경대학교대학원 동물.낙농생명과학전공) ;
  • 정종성 ((주)라이스텍) ;
  • 김완섭 (한경대학교 동물생명환경과학과)
  • Received : 2017.02.14
  • Accepted : 2017.03.22
  • Published : 2017.03.31
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Abstract

This study was conducted to find means to reduce the foul smell emitted from chicken manure. Rice water was inoculated with Lactobacillus sakei and then examined to determine the bacterial survival rates during storage, and whether fermentation had occurred. Rice water was an excellent medium for the growth of L sakei, given that a viable cell count was maintained for 15 days during storage at $4^{\circ}C$ and decreased slightly thereafter. Furthermore, microorganisms in chicken manure were separated and 14 species were identified. The antibacterial activity of an L. sakei supernatant against the identified microorganisms was measured using the agar diffusion method. The growth of 11 out of 14 species was inhibited, and only Corynebacterium variabile, Enterococcus faecium, and Raoultella ornithinolytica survived. Rice water was fermented by inoculation with L. sakei and mixed with chicken manure, and the quantities of ammonia, ethyl mercaptan, and hydrogen sulfide were measured after 48 hours. Emissions of ammonia and ethyl mercaptan were reduced significantly.

본 연구는 닭의 분뇨로부터 악취저감 방안으로, 쌀뜨물에 L. sakei의 배양조건과 저장 중 안정성을 검토하였다. 그리고 닭 분뇨로부터 미생물을 분리 동정하고, 이들 미생물에 대한 L. sakei의 항균능력을 검토하였다. 또한 L. sakei 함유 쌀뜨물 발효액이 닭 분뇨의 악취를 저감시키는지에 대하여 연구를 수행하였다. 연구결과, 쌀뜨물은 L. sakeiv의 생장에 좋은 영양소로 확인되었으며, 저장 기간 중 생존력도 강한 것으로 증명되었다. 또한 L. sakei는 닭의 분뇨로부터 분리된 악취유발 미생물의 생장 또한 억제하는 것으로 나타났다. 이러한 항균작용 또는 정균작용으로 사회적으로 문제가 되는 축산분뇨에 대하여, L. sakei를 이용해 배양된 쌀뜨물은 악취 유발을 저감할 수 있는 것으로 사료된다. 더욱이 쌀뜨물은 가치가 인정되지 않아 그대로 하수도로 버리게 되어 환경오염을 유발원으로 인식되었는데, 유산균 발효에 의한 악취 제거, 기능성 사료의 이용 등 산업적으로 많은 응용이 적용될 것으로 기대된다.

Keywords

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