Abstract
Anaerobic acidogenesis of municipal primary sludge is one way of producing external carbon sources within sewage treatment plant. The practical utility was evaluated for the TVA (Total Volatile Acids) production by anaerobic acidogenic of primary sludge on the sewage treatment plant. The reactor was fed with primary sludge alone and operated HRT 1.5 day at $35^{\circ}C$. Results show that SCOD/TCOD ratio was 8.2%, average TVA production rate was $0.0453 gTVA_{produced}/gVSS_{destroyed}$ and average SCOD production rate was $0.1453gSCOD_{produced}/gVSS_{destroyed}$. In the batch denitrification tests, the denitrification efficiency was about 39.6%, and the contents of SCOD which can be external carbon source in denitrification process was about 34%. The required gCOD for $gNO_3-N$ denitrification was $5.09gCOD/gNO_3-N.$
도시하수 일차슬러지 발효는 하수처리장 내에서 외부탄소원을 생산하는 방법중 하나이다. 하수처리장에서 일차슬러지의 산발효에 의한 TVA생성에 대한 실용성이 평가되었다. 반응조는 일차슬러지 단독으로 주입되었고 1.5일 HRT로 $35^{\circ}C$에서 운전되었다. 실험결과 SCOD/TCOD늘 8.2%, 평균 TVA생성량은 $0.0453gTVA_{produced}/gVSS_{destroyed}$ 평균 SCOD생성율은 $0.1453gSCOD_{produced}/gVSS_{destroyed}$였다. 회분식 탈질 실험에서, 탈질효율은 약 39.6%였고 탈질공정에서 외부탄소원으로 이용될 수 있는 SCOD의 함량은 약 34%였다. 질산성 질소를 탈질시키는데 필요한 COD의 양은 $4.32gSCOD/gNO_3-N$였다.