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( Kafle,G. K ),박종태 ( J. T. Park ),김상헌 ( S. H. Kim ),성경일 ( K. I. Sung ) 강원대학교 농업생명과학연구원(구 농업과학연구소) 2011 강원 농업생명환경연구 Vol.23 No.4
The anaerobic co-digestion of Chinese cabbage waste silage (CCWS) and swine manure (SM) was carried out at mesophilic temperature (36-38oC) under batch mode. The mixtures ratios of SM and CCWS were 100:0, 75:25, 67:33, 33:67 and 0:100 (SM:CCWS) on a volatile solid (VS) basis at OLR of 16 gVS/L and F/M ratio of 1.6. After 40 days of digestion, biogas yield was calculated to be 425, 408, 410, 342 and 196 mL/gVS added for the SM:CCWS (100:0), SM:CCWS (75:25), SM:CCWS (67:33), SM:CCWS (33:67) and SM:CCWS (0:100), respectively. The result also showed that CCWS content in the feed can be used up to 67% (VS basis) without decreasing the methane yield per unit feedstock input (mL/g substrate added).
Kafle, G.K.,Bhattarai, S.,Kim, S.H.,Chen, L. Academic Press 2014 Journal of environmental management Vol.133 No.-
The objective of this study was to investigate the effect of the feed-to-microbe (F/M) ratios on anaerobic digestion of Chinese cabbage waste (CCW) generated from a kimchi factory. The batch test was conducted for 96 days under mesophilic (36.5 <SUP>o</SUP>C) (Experiment I) and thermophilic (55 <SUP>o</SUP>C) conditions (Experiment II) at F/M ratios of 0.5, 1.0 and 2.0. The first-order kinetic model was evaluated for methane yield. The biogas yield in terms of volatile solids (VS) added increased from 591 to 677 mL/g VS under mesophilic conditions and 434 to 639 mL/g VS under thermophilic conditions when the F/M ratio increased from 0.5 to 2.0. Similarly, the volumetric biogas production increased from 1.479 to 6.771 L/L under mesophilic conditions and from 1.086 to 6.384 L/L under thermophilic conditions when F/M ratio increased from 0.5 to 2.0. The VS removal increased from 59.4 to 75.6% under mesophilic conditions and from 63.5 to 78.3% under thermophilic conditions when the F/M ratio increased from 0.5 to 2.0. The first-order kinetic constant (k, 1/day) decreased under the mesophilic temperature conditions and increased under thermophilic conditions when the F/M ratio increased from 0.5 to 2.0. The difference between the experimental and predicted methane yield was in the range of 3.4-14.5% under mesophilic conditions and in the range of 1.1-3.0% under thermophilic conditions. The predicted methane yield derived from the first-order kinetic model was in good agreement with the experimental results.