Journal
ENERGY CONVERSION AND MANAGEMENT
Volume 103, Issue -, Pages 401-407Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.enconman.2015.06.058
Keywords
Sewage sludge; Hydrothermal treatment; Pyrolysis; Steam gasification; Lignin content; Methane yield
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Funding
- Regional Center of Excellence (RCOE) program of the Korea Institute of Industrial Technology [EO140016]
- project Production of Fuel Additive for Transportation and Energy using Spent Black Liquor derived from Kraft Pulping Process - Ministry of Trade, Industry and Energy of Korea [NS130041]
- National Research Council of Science & Technology (NST), Republic of Korea [EO140016] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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Hydrothermal treatment is a promising option for pretreatment drying of organic waste, due to its low energy consumption and contribution to increasing fuel energy density. In this study, the characteristics of hydrothermally treated sewage sludge were investigated, and pyrolysis and steam gasification were performed with the sludge before and after hydrothermal treatment. The overall composition of product gases from treated sludge was similar to that obtained from steam gasification of wood chips, particularly under high-temperature conditions. In addition, the increase in lignin content of sewage sludge following hydrothermal treatment could help enhance methane yield in product gas during pyrolysis and steam gasification. The findings suggest that hydrothermal treatment is an appropriate method for improving sewage sludge for use as an alternative to biomass and fossil fuels. (C) 2015 Elsevier Ltd. All rights reserved.
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