Korean Journal of Microbiology (미생물학회지)

The Microbiological Society of Korea (한국미생물학회)
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Studies on the Isolation and Identification of Bacillus sp. for the Composting of Swine Manure and the Removal of Malodorous Gases from its Liquid Compost

돈분의 퇴비화를 위한 Bacillus sp.의 분리 동정 및 그 액체 비료의 악취 제거 연구

  • 김규동 (중앙대학교 산업과학대학 생명공학과) ;
  • 김기연 (중앙대학교 산업과학대학 생명공학) ;
  • 함영태 (중앙대학교 산업과학대학 생명공학과)
  • Published : 2004.06.01
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Abstract

Bacillus species were isolated from swine manure to develope the microbial additive suitable for the rapid com-posting. The 3 of 4 isolated strains were identified as Bacillus cereus KD-2, B. pumilus KD-3, and B. licheni-formis KD-4. Bacillus sp. KD-1 was, however, not highly identical with any Bacillus sp. The isolated strains were analyzed their growth rates, enzyme activities, and antibacterial activities. The maximum growth tem-peratures of KD-1, KD-2, KD-3 and KD-4 were $45^{\circ}C$, $50^{\circ}C$, $53^{\circ}C$, and $55^{\circ}C$, respectively. The activities of pro-tease or amylase in mixed culture of 4 strains were similar in the range of $37^{\circ}C$ to $53^{\circ}C$ and activities of lipase in the range of $37^{\circ}C$ to $42^{\circ}C$ were twice higher than those of lipase in the range of $47^{\circ}C$ to $53^{\circ}C$. The antibacterial activity of KD-l, KD-2, or KD-3 against each other was not detected. That of KD-4 against KD-1, KD-2, or KD-3 was, however, detected. The organic compound and C/N ratio of compost fermented by the mixed culture were determined as 61.9% and 22.4%, respectively. The concentration of the ammonia gas was 12.35 mg/l in the liquid compost.

돈분 고속발효에 적합한 미생물 제제를 개발하기 위하여 Bacillus속을 돈분에서 분리한 후,분리 균주의 생장능력, 효소활성 및 상호균주에 대한 항균활성을 비교 분석하였다. 분리된 4종을 동정한 결과, Bacillus cereus KD-2, B. pumilus KD-3, B. licheniformis KD-4로 분석되었고, 분리균주 KD-1은 그 어떤 Bacillus 종들과도 높은 일치성을 보이지 않았다. 생장최고온도는 Bacillus sp. KD-1이 $45^{\circ}C$, B. cereus KD-2가 $50^{\circ}C$, B. pumilus KD-3는 $53^{\circ}C$, B. licheniformis KD-4는 $55^{\circ}C$이었다. 이들 균주 모두를 혼합한 미생물 제제의 효소활성은 protease와 amylase는 37-$53^{\circ}C$ 범위에서 그 활성도에 차이를 보이지 않았고, lipase는 37-$42^{\circ}C$에서의 효소활성이 47-$53^{\circ}C$에 비해 2배 이상 높았다. 혼합 미생물 제제에 사용된 균주들의 상호 항균활성은 Bacillus sp. KD-1, B. cereus KD-2, B. pumilus KD-3는 타 균주의 생장에 영향을 주지 않았고, B. licheniformis KD-4의 배양 상층액을 10% (v/v)의 농도로 첨가시 다른 균주의 생장에 거의 영향을 주지 않았으나, 50% (v/v)로 혼합할 경우 다른 균주들의 생장을 억제하였다. 이 미생물 혼합 제제로 발효된 유기질비료의 성분은 유기물이 61.9%, 질소가 1.6%, C/N비가 22.4%, 인산이 0.21%, 칼리가 1.0%로 분석되었다. 발효 부산물인 액체비료의 암모니아 가스농도는 12.35 mg/1로 낮게 검출되었다.

Keywords

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