earticle

영어

Pilot scale study was carried out to produce Volatile Fatty Acids with primary sludge from municipal wastewater treatment plant. An acid fermenter was operated at pH 9, 35℃, SRT of 3.5-4.25d, using a final effluent as elutriating water(Mode-Ⅰ)and pH 9, SRT 5d, temperature of 35℃(Mode-Ⅱ), 55℃(Mode-Ⅲ), using a primarily treated water as elutriating water. Although solubilization rate was enhanced with the increase of temperature, the VFAs production rate was decreased. The VS reduction was shown approximately 56%, and the sludge volume reduction was 93%. The optimal conditions for solubilization was obtained at pH 9, 35℃ and SRT of 5d.

한국어

본 연구에서는 하수일차슬러지의 가용화 및 산발효를 위한 pilot scale 세정산발효공정의 운전 특성을 검토하였다. 하수일차슬러지의 가용화 및 산발효 특성을 평가하기 위해 SRT, 세정수 및 운전온도를 변화시켜 실험을 수행하였다. 세정산발효공정의 가용화율은 온도가 높을수록 증가하는 반면, 산생성율은 중온조건(35℃)이 고온조건(55℃)보다 높게 나타났다. VS 감량은 약 56%, 슬러지 부피감량은 약 93%까지 나타났다. 가용화측면에서 세정산발효공정의 최적운전조건은 pH 9,35℃ 및 SRT 5일이 적합 할 것으로 판단된다.