Microbiology and Biotechnology Letters (한국미생물·생명공학회지)
- Volume 6 Issue 1
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- Pages.17-22
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- 1978
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- 1598-642X(pISSN)
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- 2234-7305(eISSN)
Studies on Recycling of Feedlot Waste (Part 1) Microbial and Chemical Changes during the Fermentation of Swine Feces-Corn Meal Mixture
축산폐기물의 이용에 관한 연구 (제1보) 돈분과 옥분 혼합물의 발효중 일어나는 미생물학적 및 화학적 변화
Abstract
The microbial and chemical changes, and characterization of the predominant acid-producing bacteria in the fermenting pig feces blended with corn meal at a ratio of 50:50 were studied. The fermentation was dominated by lactobacilli, which multiplied rapidly for the first 24 hours. The acid produced during the fermentation caused rapid pH drop to pH 4.5 and halted the growth of E. coli and yeast. The initial acid producing bacteria in the mixture was predominantly Streptococcus species, which were reduced in number rapidly. After 7 days of fermentation, three lactobacilli species were appeared L. acidophilus, L. fermenti, L. delbrueckii. Chemical changes during the fermentation were also studied. The lactic acid fermentation imparted a good tangy acid flavor to the corn-feces mixture by removing or covering the .fecal ordour and made the corn-feces mixture palatable for the animal as well as halted the unwanted microbial flora. We hope the lactic acid fermentation will replace the heat processing in the utilization of animal feces.
돈분과 옥분을 50:50으로 혼합하여 3
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