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논문 기본 정보

자료유형
학술저널
저자정보
안정원 (서울시립대학교) 오민아 (서울시립대학교) 이영진 (서울시립대학교) 오승진 (서울시립대학교) 오화수 (토방토건(주)) 김용화 (그린에너지개발(주)) 이재영 (서울시립대학교)
저널정보
한국폐기물자원순환학회 한국폐기물자원순환학회지 한국폐기물자원순환학회지 제35권 제2호
발행연도
2018.1
수록면
103 - 109 (7page)

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The amount of sewage sludge that is emitted is gradually increasing every year. However, since 2012, because of theLondon Protocol, the oceanic dumping of sewage sludge has been prohibited. Therefore, for recycling organic waste, eitherthe ground disposal method has to be used or technological solutions that develop energy from such waste have to beidentified. Heat is generated when the sewage sludge has decomposed by aerobic microbes. In this study, to dehydratesewage sludge, heat was applied and the drying efficiency was evaluated according to the air flow rate (AFR) and theproportional mixing of the returned sludge. For the experiments, returned sludge that was dried to 40% moisture contentwas used; consequently, the highest temperature was obtained when the moisture content was 30% and, for maintainingaerobic conditions, the optimal AFR was 200 ml/min·kg. During biodrying for 14 days, the highest temperature of reactorwas 46oC, which was maintained at higher than 40oC for 5-7 days; moreover, 18.8% of moisture was eliminated. Theseresults show that using biodrying for treating sewage sludge has economic potential compared to hot-air drying; moreover,with additional treatment, biodrying can be one of the methods for producing Bio Solid Refuse Fuel (Bio-SRF).

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