Abstract
The co-combustion of sewage sludge and biomass is a key problem in coal-fired power plants. The combustion characteristics and pollutant emissions of municipal sewage sludge and biomass could result in unpredictable operation and environmental problems. In this study, the combustion experiments of corn stalk (CS), municipal sewage sludge (SS), and their blends were conducted in the thermogravimetric analyzer and muffle furnace, focusing on the combustion characteristics and the pollutants (SO2/NO) emissions with different temperature, proportion, and heating rate. It was found that the combustion characteristics of the mixture are affected by the mix ratio of SS. Compared with those of SS, the SO2 emission amount and S-SO2 conversion rate of CS are lower. The content of N in SS is higher than CS, but the conversion rate of N-NO is lower. Although the emissions of SO2 and NO from CS blending with SS are higher than those from CS combustion alone, the conversion rate of SO2 and NO decreases. This means that the co-combustion of CS and SS will reduce the content of pollutants released by CS combustion alone and effectively solve the environmental problems associated with CS incineration.
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The datasets used and analyzed during the current study are available from the corresponding author on reasonable request.
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Acknowledgments
We are grateful to Northeast Electric Power University and the Engineering Research Centre of Oil Shale Comprehensive Utilization, Ministry of Education for the support of experimental equipment.
Funding
This study was supported by the “thirteenth five-year” science and technology research project of the education department of Jilin province, China (JJKH20190702KJ).
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All authors discussed the results during manuscript preparation. L. H. P designed the research and analyzed data; Z. S. Q wrote the manuscript and participated in the data analysis; F. S. Y, and J. C. X conducted experiments; G. S; S. B. Z, and W. Q provided the constructive suggestions; all authors have read and approved the final paper as submitted.
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Liu, H., Zhang, S., Feng, S. et al. Combustion characteristics and typical pollutant emissions of corn stalk blending with municipal sewage sludge. Environ Sci Pollut Res 28, 9792–9805 (2021). https://doi.org/10.1007/s11356-020-11463-y
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DOI: https://doi.org/10.1007/s11356-020-11463-y