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학술연구/단체지원/교육 등 연구자 활동을 지속하도록 DBpia가 지원하고 있어요.
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연구자들이 자신의 연구와 전문성을 널리 알리고, 새로운 협력의 기회를 만들 수 있는 네트워킹 공간이에요.
논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 발행연도
- 2011.1
- 수록면
- 137 - 145 (9page)
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Cost-Benefit analysis was performed for optimization of sewage sludge treatment process in Public Owned Treatment Works (POTWs). The sludge treatment efficiencies were evaluated by thickening type(gravity and centrifugal), dewatering procedure (after thickening and after digestion) and dewatering type(belt press and screw decanter). Economical efficiency was evaluated by B/C ratio based on Cost-Benefit Analysis(CBA) for four types of sludge treatment processes. Regarding thickening type, the centrifugal thickening was more beneficial than gravity thickening in terms of solid recovery and sludge thickening rate. Results showed that after digestion type consumed 1.8 times as small as after thickening type. The digestion rate and the sludge reduction rate were 42.4% and 39.7%, respectively. Results showed that the screw decanter type was more effective as dewatering type because the moisture content of dewatering cake was 79.1%. However,the amount of dewatering chemicals was 1.3 times for large scale POTWs and 2.8 times for small scale POTWs. The result of CBA showed that the B/C ratios of centrifugal thickening and centrifugal thickening after digestion were 3.0 and 2.45, respectively. Therefore, these types were applicable to the sludge treatment in the aspect of cost benefit.
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