期刊
WATER ENVIRONMENT RESEARCH
卷 88, 期 9, 页码 804-810出版社
WILEY
DOI: 10.2175/106143016X14609975747441
关键词
biochar; bio-oil; py-gas; enthalpy; sustainability; water resource reclamation facilities; wastewater treatment; drying; biosolids handling
资金
- Milwaukee Metropolitan Sewerage District
Pyrolysis is a thermal process that converts biosolids into biochar (a soil amendment), py-oil and py-gas, which can be energy sources. The objectives of this research were to determine the product yield of dried biosolids during pyrolysis and the energy requirements of pyrolysis. Bench-scale experiments revealed that temperature increases up to 500 degrees C substantially decreased the fraction of biochar and increased the fraction of py-oil. Py-gas yield increased above 500 degrees C. The energy required for pyrolysis was approximately 5-fold less than the energy required to dry biosolids (depending on biosolids moisture content), indicating that, if a utility already uses energy to dry biosolids, then pyrolysis does not require a substantial amount of energy. However, if a utility produces wet biosolids, then implementing pyrolysis may be costly because of the energy required to dry the biosolids. The energy content of py-gas and py-oil was always greater than the energy required for pyrolysis.
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