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http://dx.doi.org/10.17137/korrae.2019.27.3.27

Variation in Physicochemical Properties and Anaerobic Digestion Efficiency by Thermal-alkali Pre-treatment (THAP) Factors  

Park, Seyong (Bioresource Center, Institute for Advanced Engineering)
Han, Sungkuk (Bioresource Center, Institute for Advanced Engineering)
Song, Eunhey (Bioresource Center, Institute for Advanced Engineering)
Kim, Choonggon (Bioresource Center, Institute for Advanced Engineering)
Lee, Wonbae (Department of Civil & Environmental Engineering, Hanyang University)
Publication Information
Journal of the Korea Organic Resources Recycling Association / v.27, no.3, 2019 , pp. 27-39 More about this Journal
Abstract
In this study, thermal-alkali pre-treatment (THAP) optimal condition and co-digestion efficiency with THAP of the mixture food waste and sewage sludge were evaluated for improving the performances of co-digestion for mixed food waste and sewage sludge. The optimal condition of THAP was evaluated for solubilization COD, CST(Capillary Suction Time), TTF(Time to Filter), and volatile fatty acids (VFAs) with THAP temperature and NaOH concentration. In addition, the co-digestion of mixed food waste and sewage sludge were evaluated using biochemical methane potential (BMP) test. The optimal THAP reaction temperature and NaOH concentration of food waste and sewage sludge were $140^{\circ}C$ and 60 meq/L to solubilization COD over 20%, CST and TTF under 60sec and VFAs concentration over 12,000 mg-COD/L, respectively. The optimal condition of co-digestion of mixed food waste and sewage sludge equal to THAP condition. Therefore, it was determined that the optimal condition of THAP reaction temperature and NaOH concentration for co-digestion of mixed food waste and sewage sludge were $140^{\circ}C$ and 60 meq/L, respectively.
Keywords
Food waste; Sewage sludge; Thermal-alkali pre-treatment; Co-digestion; Solubilization COD;
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