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하수(下水) 처리장(處理場)에서 정수조폐액(淨水槽廢液)의 혐기성소화(嫌氣性消化) 처리(處理)에 관한 연구(硏究) KCI 등재
Anaerobic Digestion of Thickened Septage at Municipal Wastewater Treatment Plant
- 언어KOR
- URLhttps://db.koreascholar.com/Article/Detail/424599
pp.13-19
Anaerobic Digestion of thickened septage was investigated in this study. Thickening could reduce the volume of septage to be treated to about 40% with 12hr HRT. The VS and BOD removal efficiencies were respectively 28 to 45%, and 75% when digested the thickened septage with 30 day HRT Or $1.4kgVS/m^3/d$. The BOD removal efficiency could be increased to about 90% with subsequent settling tank with about 6 hours HRT. The gas production rate was 0.22 to $0.35m^3gas/kgVSadd$($0.75m^3gas/kgVSrm$), or $1.32m^3gas/kgBOD_{rm}$. In addition, the supernatant of thickener could be returned to the aeration tank treating domestic sewage. In this case, a BOD loading rate of 0.5 to $0.7kgBOD/m^3/d$ or 0.5kgBOD/kgMLVSS/d was proposed for 80% BOD reduction.
