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송풍량에 따른 하수슬러지 Biodrying의 건조 효율성 평가

Evaluation of Bio-drying Efficiency of Sewage Sludge by Air Flow Rate

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  • URLhttps://db.koreascholar.com/Article/Detail/352391
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한국폐기물자원순환학회 (Korea Society Of Waste Management)
초록

The amount of sewage sludge emission is gradually increasing every year. However, the Ocean dumping of sewage sludge was prohibited since 2012 by london convention 96 protocol. Therefore, ground disposal method for recycling organic waste or utilizing to energy technology was needed. The heat is generated when sewage sludge has decomposed with the aerobic microbes. In this study, the heat would be applied to dehydrate sewage sludge. The drying efficiency was evaluated according to Air Flow Rate(AFR) and the mixing proportion of the returned sludge. At the experiments used returned sludge Which was dried at 40% moisture content. As a result, the most high temperature was indicated when it mixed 30% and optimal AFR for maintaining aerobic condition was 200 mL/min.kg. During 14days of Biodrying, the highest temperature of reactor was 46℃ and maintained 5~7days are higher than 40℃. and also 18.8% of moisture was eliminated. These results show that using Biodrying to sewage sludge has economic potential compared to hot-air drying and can be one of the method to produce SRF with additional treatment.

저자
  • 안정원(서울시립대학교 환경공학과) | Jeong Won An
  • 오민아(서울시립대학교 환경공학과) | Minah Oh
  • 오승진(서울시립대학교 환경공학과) | Seungjin Oh
  • 오화수(토방토건) | Hwa-Soo Oh
  • 김용화(그린에너지개발(주)) | Yonghwa Kim
  • 이재영(서울시립대학교 환경공학과) | Jai-Young Lee