| Title |
Effects of Elutriating Rates for Elutriated Acid Fermentation of Food Waste |
| Authors |
권구호 ( Koo Ho Kwon ) ; 이상협 ( Sang Hyub Lee ) ; 민경석 ( Kyung Sok Min ) |
| Keywords |
Elutriated acid fermentation; Food waste; Solubilization; VS reduction |
| Abstract |
The korean government started to ban the sanitary landfill of food wastes as of 2005. The radical change of policy is primarily due to the limited landfill site, but aimed to promote not only to reduce the food waste production but also to enhance the reuse and recycle. The performance of elutriated acid fermentation to evaluate the effects of elutriating ratios was investigated. The fermenters were operated with elutriating water to food waste volumetric ratio of 2, 1, 0.5 and 0.25. Initial pH of elutriating water was set for 9 based on the pH effects study. The cumulative amounts of SCOD production rate were 0.34 gSCOD/gVSi, 0.45 gSCOD/gVSi, 0.26 gSCOD/gVSi and 0.28 gSCOD/gVSi with the ratios of 2, 1, 0.5 and 0.25, respectively. The cumulative productions of VFAs were 0.12 gVFAs as COD/gVSi, 0.28 gVFAs as COD/gVSi, 0.21 gVFAs as COD/gVSi and 0.14 gVFAs as COD/gVSi with the ratios of 2, 1, 0.5 and 0.25, respectively. The volume reduction were 58%, 52%, 45% and 47% with the ratios of 2, 1, 0.5 and 0.25, respectively. |