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KMID : 0382420010270040079
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Korean Journal of Environmental Health Society
2001 Volume.27 No. 4 p.79 ~ p.83
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Utilization as External Carbon Source of TVFAs Fermentation with Sludge
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Kim Young-Kyu
Kim In-Bae
Kim Min-Ho
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Abstract
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The sludge wastes fermentation process reactors were operated to produce the VFAs(volatile fatty acids) as supplemental carbon sources and to determine the optimum operating conditions. The experiment was carried out by varied mixture ratio of 400:0, 350:50, 300:100, 200:200, and operating temperature of 20℃, 30℃, and 40℃. The results were as follows ; Higher VFAs production rate was observed at higher mixed ratio of primary sludge. When the mixed ratio of primary sludge and return sludge were 400: 0, 350:50, 300:100, 200:200, respectively. VFAs production rate were 829.6㎎/ℓ, 944.2㎎/ℓ, 597.9㎎/ℓ and 441.6㎎/ℓ, respectively. The yield of VFAs increased with temperature, but decreased with initial TSS concentration. Because fermented sludge has relatively low nitrogen and phosphorous and relatively high VFAs, it can be used as a substitute for external carbon in biological nutrient removal process.
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