오존 및 마이크로웨이브 전처리를 이용한 농축하수슬러지 가용화율 평가

초록

The objective of this study was to find optimum pretreatment conditions of ozone and microwave for solubilization of thickened waste activated sludge (TWAS). Response surface analysis was applied to determine the combination of ozone concentration (0.03 to 0.1 g O3/g total solid (TS)) and microwave temperature (100 ~ 170oC). The temperature significantly affected the solubilization degree of sludge (p < 0.01). Within the design boundaries, the conditions predicted to maximize the solubilization degree of 41.6% were determined to be 0.065 g O3/g TS and 170oC. On the other hand, the solubilization degree with the ozone pretreatment alone was 2.7 to 12.2% at 0.03 ~ 0.1 g O3/g TS. The results show that the combination of ozone and microwave pretreatments is effective in solubilization of TWAS.

키워드