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Deodorization of Pig Feces by Fungal Application

  • Kim, T.I. (National Livestock Research Institute, Rural Development Administration) ;
  • Ham, J.S. (National Livestock Research Institute, Rural Development Administration) ;
  • Yang, C.B. (National Livestock Research Institute, Rural Development Administration) ;
  • Kim, M.K. (School of Agricultural Biotechnology Center for Plant Molecular Genetics and Breeding Research, Seoul National University)
  • Received : 2003.12.19
  • Accepted : 2004.05.15
  • Published : 2004.09.01

Abstract

This study was carried out to screen yeasts effective in reducing odor from pig feces. Three isolates from soil and compost sources were selected to treat pig feces. On the basis of morphological and biochemical characteristics, one isolate from compost was Candida rugosa, and two isolates from soil were Candida rugosa and Candida maris. These isolates showed deodorizing activity by reducing the concentration of ${NH}_3$ and R-${NH}_2$. Volatile fatty acids (VFA) are the specific malodorous compounds of pig feces, and the Candida maris from soil showed a 100% reduction of butyric, iso-butyric, and iso-valeric acid in 10% pig slurry medium. However, the Candida rugosa from compost showed a 100% reduction of butyric and iso-butyric acid while that from soil showed a 100% reduction of propionic, butyric acid and iso-valeric acid in the medium. Also, these yeasts were effective in reducing $NH_{4}-N$, soluble-N, and biological oxygen demand (BOD).

Keywords

Candida rugosa;Candida maris;Volatile Fatty Acids;Pig Feces

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