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The objectives of this research was to evaluate the anaerobic digestibility of waste actizvated sludge (WAS) and waste beverages in beverages manufacturing industry using BMP test under various conditions. Also, the effects of physical (ultrasonic) and biological (lactobacillus) solubilization process on anaerobic digestibility of WAS were thoroughly studied. The soluble chemical oxygen demand (SCODCr)/total chemical oxygen demand (TCODCr) ratio of WAS was 0.15 but the SCODCr/TCODCr ratio after solubilization was increased 17.5% by ultrasonic, 18.8% by lactobacillus respectively. The results of BMP test, methane gas productivity as mixing ratio of WAS and waste beverages were 156 ml CH4/gCODCr, 164 ml CH4/gCODCr and 182 ml CH4/g CODCr, respectively 9 : 1, 8 : 2, 7 : 3 before the solubilization of WAS. As the mixing ratio of waste beverages increase, VFAs concentration and methane productivity was increased. Also, methane gas productivity as mixing ratio after the solubilization of WAS using ultrasonic and lactobacillus was increased 3.3 ~ 11.3%, 11.1 ~ 15.2% respectively. From the results, it was judged that anaerobic digestion using WAS and waste beverages could be feasible.

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