| Title |
Comparison of Anaerobic Digestion Performance in Mixing Sewage Sludge and Livestock Wastewater with Food Waste |
| Authors |
성낙창(Nak Chang Sung),강동효(Dong Hyo Kang),박경철(Kyung Choul Park) |
| Abstract |
Sewage sludge and livestock wastewater with food waste were mixed and digested. The results are as follows. In case of mixing digested sewage sludge with food waste, the pH vaule was lowed by the organic acid of a large quantity at the beginning of the inspection so that NaOH was poured into reactor. But in case of mixing digested livestock wastewater with food waste, during experimental the pH value was set neutral because of high alkalinity of livestock wastewater. In the case of VS removal ratio the result showed the higher removal value about 5.3% in R2(1:1), R₃(1:2) mixing sewage sludge and food waste than sewage sludge digestion alone, and reactor R-5 in which livestock wastewater and food waste were mixed with rate of 1:1 showed the highest removal value about 6.3% than livestock wastewater digestion alone. Though food waste with initial CI^- concentration of 3,000㎎/L showed about 4,700㎎/L at the highest point in the reactor R₃(1:2), there had no effect on VS removal and the production of CH₄. In the case of sewage sludge digestion alone and livestock wastewater digestion alone, the production rates of CH₄ gas per gVS removal were 125mL and 51mL. In the production rates of CH₄ gas per gVS removal, reactor R₂ and R₃ in which sewage sludge and food waste were conbined with mixing ratio of 1:1, 1:2 showed 68mL and 71mL which were more than sewage sludge digestion alone. But R-5 and R-6 in which livestock wastewater and food waste were conbined with mixing ratio of 1:1, 1:2 showed 18mL and 8mL. Therefore, it is concluded that sewage sludge and livestock wastewater mixing with food waste is more possible than sewage sludge and livestock wastewater digestion alone. |