Environmental investigation on co-combustion of sewage sludge and coal gangue: SO2, NOx and trace elements emissions. (April 2016)

• Record Type: Journal Article
• Authors: Yang, Zhenzhou; Zhang, Yingyi; Liu, Lili; Wang, Xidong; Zhang, Zuotai
• Is Part Of: Waste management. Volume 50(2016)
• Page Start: 213
• Page End: 221
• Publication Date: 2016-04
• Subjects: Sewage sludge -- Coal gangue -- Co-combustion -- Gaseous pollutants emission -- Trace element; Hazardous wastes -- Periodicals; Refuse and refuse disposal -- Periodicals; 363.728
• DOI: 10.1016/j.wasman.2015.11.011
• Languages: English
• ISSNs: 0956-053X

Abstract

Highlights: Environmental issues during combustion of sludge and coal gangue were explored. Synergic effect on desulfurization and denitrification can be obtained at 800 °C. Enhanced retention of trace elements was observed during co-combustion. Cooperative handling of sewage sludge and coal gangue can be expected. Abstract: To promote the utilization of waste material as alternative fuel, the mono- and co-combustion characteristics of sewage sludge (SS) and coal gangue (CG) were systematically investigated, with emphasis on environmental influences. The emission of SO2, NO x as well as the trace elements during combustion of SS and CG were studied with regard to the effects of their chemistries, structures and interactions. Results showed that co-combustion can be beneficial for ignition performance. A synergic effect on both desulfurization and denitrification can be expected at ca. 800 °C. Further, an enhanced retention of trace elements during co-combustion was also observed, especially for Pb and Zn. On the basis of the results, it can be expected that, with proper operation, co-combustion of SS and CG can be a promising method for the disposal of these two wastes.