Transformation and Mitigation of Tar and Related Secondary Pollutants during Sewage Sludge Pyrolysis

被引:0
|
作者
Lin, Qingyuan [1 ]
Liu, Yongxiao [1 ]
Jiao, Yimeng [1 ]
Lv, Pengzhao [1 ]
Liu, Yanbo [1 ]
Zuo, Wei [1 ]
Tian, Yu [1 ]
Zhang, Jun [1 ]
机构
[1] Harbin Inst Technol, Sch Environm, State Key Lab Urban Water Resource & Environm SKLU, Harbin 150090, Peoples R China
基金
中国国家自然科学基金; 国家重点研发计划;
关键词
sewage sludge pyrolysis; transformation; mitigation; tar and secondary pollutants; co-pyrolysis; WASTE-WATER TREATMENT; MICROWAVE-ASSISTED PYROLYSIS; MUNICIPAL SOLID-WASTE; HEAVY-METALS; BIO-OIL; NOX PRECURSORS; HYDROTHERMAL CARBONIZATION; ENVIRONMENTAL RISK; THERMOCHEMICAL CONVERSION; MIGRATION CHARACTERISTICS;
D O I
10.3390/w16142066
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
Sewage sludge has long been perceived as the bottleneck of wastewater treatment plants in China, restraining the healthy development of sewage treatment for decades. In recent years, pyrolysis as a promising multifunctional platform has attracted increasing interest for converting sludge into valuable resources. However, the generation and presence of pyrolysis tar, one of the key by-products during sludge pyrolysis, limit the wide application of pyrolysis product resources. The efficient and selective conversion of tar is complicated by the inherent complexity of sludge and various pollutants (e.g., N-, S-, and Cl-containing organic pollutants, heavy metals) in pyrolysis products, which may either migrate into tar or be released into the environment, complicating the in-depth treatment of tar and posing environmental risks. This review systematically examines the transformation and migration of tar and related secondary pollutants during sludge pyrolysis in order to optimize the pyrolysis process for resource recovery. We provide an overview of the research progress on tar generation, transformation, and secondary pollutants during pyrolysis; discuss potential control strategies for pollution abatement; and highlight the importance of understanding tar transformation during pyrolysis. Additionally, we offer insights into future development trends and research hotpots in this field. This review aims to deliver valuable information on the mechanism of tar formation, the conversion pathways of secondary pollutants, and corresponding control strategies, thus guiding the design and optimization of sludge pyrolysis processes to achieve higher efficiency and selectivity, with minimal environmental pollution.
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页数:22
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