Back S. Sun, B. Ahn, K. Myung and K. Kim
Department of Animal Science, Institute of Biotechnology, Chonnam National University, Kwangju, 500-757 Korea
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Abstract
Ten swine farms were installed waste management systems. Farm size was different from 200 to 3,000 pigs. Pigs were managed under a fully automated system. Treatments were made with 2 x 3 Lartin square arrangements. Two seasonal effects were hot summer (25 - 35oC) and cold winter (10 - -15oC). Three EM levels were 1:1,000, 1:5,000, 1:10,000 dilution directly into waste fermentation tanks. Heavy foams were created during mid-day of hot summer in all EM treatment levels. However, the severeness was diminished in low dilution rate. Aeration and spray helped to reduce foam formation during this period. During winter, the fermentation was not proceeded and then the waste remained several months. Therefore, heating system was help fermentation process. In order to optimize waste treatment system, the solid materials were screened and then relative liquid type waste was input into fermentation system. The fermentation was best condition with screening method in all levels of EM treatment during summer time. In conclusion, pig waste was completely fermentable with EM treatment with liquid type manure and the optimum condition should be adjusted by environmental temperature and farm size.