A technical and economic evaluation of the pyrolysis of sewage sludge for the production of bio-oil

被引:286
作者
Kim, Y. [1 ]
Parker, W. [1 ]
机构
[1] Univ Waterloo, Dept Civil Engn, Waterloo, ON N2L 3G1, Canada
基金
加拿大自然科学与工程研究理事会;
关键词
pyrolysis; sewage sludge; bio-oil; economic estimation;
D O I
10.1016/j.biortech.2007.01.056
中图分类号
S2 [农业工程];
学科分类号
0828 ;
摘要
Pyrolysis to produce bio-oil from sewage sludge is a promising way, to not only improve the economical value, but also to reduce pollutants associated with sludge. The aim of this study was to evaluate the production of oil from primary, waste activated and digested sludges. The pyrolysis was performed in a laboratory-scale horizontal batch reactor. The operating temperature ranged from 250 degrees C to 500 degrees C, while a gas phase residence time of 20 min was maintained with 50 ml/min of nitrogen gas as a purge flow. The maximum oil yield was achieved with primary sludge at 500 degrees C. Temperature and volatile solids were the most important factors affecting the yield of oil and char, however, sludge type also affected both results. Pre-treatment of sludge with either acids, a base or a catalyst (zeolite) did not improve the quantity of oil produced. The economic values of the oil produced from primary, TWAS, and digested sludges were estimated as 9.9, 5.6, and 6.9 phi/kg-ds when the value of oil is 32 phi/kg-oil. (C) 2007 Elsevier Ltd. All rights reserved.
引用
收藏
页码:1409 / 1416
页数:8
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