Dewatering and low-temperature pyrolysis of oily sludge in the presence of various agricultural biomasses

被引:20
作者
Zhao, Song [1 ,2 ]
Zhou, Xiehong [1 ,2 ,3 ]
Wang, Chuanyi [1 ,2 ]
Jia, Hanzhong [1 ,2 ]
机构
[1] Chinese Acad Sci, Xinjiang Tech Inst Phys & Chem, Lab Environm Sci & Technol, 40-1 South Beijing Rd, Urumqi 830011, Xinjiang, Peoples R China
[2] Chinese Acad Sci, Xinjiang Tech Inst Phys & Chem, Key Lab Funct Mat & Devices Special Environm, Urumqi, Peoples R China
[3] Northwest Univ, Sch Chem Engn, Xian, Shaanxi, Peoples R China
基金
中国科学院西部之光基金; 中国国家自然科学基金;
关键词
Oily sludge; dewatering; pyrolysis; biomass; oil recovery; PETROLEUM SLUDGE; SEWAGE-SLUDGE; WASTE; PRODUCTS; EMISSION; RECOVERY; REMOVAL; LIGNIN;
D O I
10.1080/09593330.2017.1365938
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
Pyrolysis is potentially an effective treatment of waste oil residues for recovery of petroleum hydrocarbons, and the addition of biomass is expected to improve its dewatering and pyrolysis behavior. In this study, the dewatering and low-temperature co-pyrolysis of oil-containing sludge in the presence of various agricultural biomasses, such as rice husk, walnut shell, sawdust, and apricot shell, were explored. As a result, the water content gradually decreases with the increase of biomass addition within 0-1.0wt % in original oily sludge. Comparatively, the dewatering efficiency of sludge in the presence of four types of biomasses follows the order of apricot shell>walnut shell>rice husk>sawdust. On the other hand, rice husk and sawdust are relatively more efficient in the recovery of petroleum hydrocarbons compared with walnut shell and apricot shell. The recovery efficiency generally increased with the increase in the biomass content in the range of 0-0.2wt %, then exhibited a gradually decreasing trend with the increase in the biomass content from 0.2 to 1.0wt %. The results suggest that optimum amount of biomass plays an important role in the recovery efficiency. In addition, the addition of biomass (such as rice husk) also promotes the formation of CxHy and CO, increasing the calorific value of pyrolysis residue, and controlled the pollution components of the exhaust gas discharged from residue incineration. The present work implies that biomass as addictive holds great potential in the industrial dewatering and pyrolysis of oil-containing sludge.
引用
收藏
页码:2715 / 2723
页数:9
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