Journal of The Korean Society of Grassland and Forage Science (한국초지조사료학회지)

The Korean Society of Grassland and Forage Science (한국초지조사료학회)
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Effects Microbial Addition and Incubation Temperatures on Odor of Pig Manure as Fertilizer on Grass and Crop Fields

초지 및 농경지에 살포되는 돼지 분뇨의 냄새에 미생물 첨가 및 분뇨 배양온도가 미치는 효과

  • 황옥화 (농촌진흥청 국립축산과학원) ;
  • 박성권 (세종대학교 식품공학부) ;
  • 한덕우 (농촌진흥청 국립축산과학원) ;
  • 이상룡 (농촌진흥청 국립축산과학원) ;
  • 곽정훈 (농촌진흥청 국립축산과학원) ;
  • 조성백 (농촌진흥청 국립축산과학원)
  • Received : 2016.05.09
  • Accepted : 2016.05.17
  • Published : 2016.06.30
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Abstract

Odor in pig manure affects the distribution of the manure over grass and crop fields as fertilizer. The objective of this study was to investigate the effect of different types of microbes (Saccharomyces cerevisiae, Bacillus subtilis and Rodobacter capsulata) and incubation temperatures ($20^{\circ}C$ and $35^{\circ}C$) on the levels of odorous compounds in pig manure. Pig manure was incubated with 0.03% microbes (v/v) at temperatures of $20^{\circ}C$ or $35^{\circ}C$. At incubation temperature of $20^{\circ}C$, the addition of Rodobacter capsulata significantly (p<0.05) decreased the levels of indoles and volatile fatty acid (VFA). At incubation temperature of $35^{\circ}C$, the addition of any microbes of the three used in this study did not significantly (p>0.05) affect the levels of odorous compounds. When incubation temperature was increased from $20^{\circ}C$ to $35^{\circ}C$, levels of odorous compounds were significantly (p<0.05) increased. Taken together, these results suggest that Rodobacter capsulata could be utilized to reduce odor from pig manure in the spring and fall when the average temperature is around $20^{\circ}C$. However, alternative odor-reducing technology is needed to be developed to apply onto pig manure during the hot summer season ($35^{\circ}C$).

초지 및 농경지에 비료로 살포되는 돼지 분뇨에서 불쾌한 냄새가 발생되면 가축 분뇨의 이용 및 냄새 민원의 발생에 영향을 줄 수 있다. 본 연구는 돼지 분뇨의 냄새를 감소하기 위하여 냄새 저감용으로 많이 이용되는 미생물 3종을 분뇨에 살포한 후 봄 가을($20^{\circ}C$) 및 여름($35^{\circ}C$)에 해당되는 온도에서 2주간 배양한 다음 냄새물질의 농도를 평가하였다. 분뇨를 $20^{\circ}C$에서 배양하였을 때 인돌류와 휘발성 지방산의 농도가 광합성균 처리구에서 낮았다(p<0.05). 분뇨를 $35^{\circ}C$에서 배양하였을 때에는 냄새물질의 농도가 미생물 처리구 간에 유의적인 차이가 없었다(p>0.05). 돼지 분뇨의 배양온도가 $20^{\circ}C$에서 $35^{\circ}C$로 상승되었을 때 냄새물질의 농도가 크게 증가되었다(p<0.05). 이상의 연구결과를 종합하면, 봄 가을($20^{\circ}C$)에는 돼지 분뇨의 냄새를 저감하기 위한 냄새저감 미생물로 광합성균을 이용할 수 있고, 여름 ($35^{\circ}C$)에는 분뇨에 첨가한 미생물의 활성을 높일 수 있는 다른 물질의 개발이 필요할 것으로 판단된다. 결론적으로, 돼지 분뇨에서 발생되는 냄새를 줄이는 것은 초지 및 농경지에 살포되는 가축 분뇨의 영양학적 가치를 높이고 이용성을 향상시키기 위해서 매우 중요하다.

Keywords

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