| Issue |
E3S Web Conf.
Volume 683, 2026
2025 2nd International Conference on Environment Engineering, Urban Planning and Design (EEUPD 2025)
|
|
|---|---|---|
| Article Number | 02005 | |
| Number of page(s) | 6 | |
| Section | Environmental Ecology and Sustainable Development | |
| DOI | https://doi.org/10.1051/e3sconf/202668302005 | |
| Published online | 09 January 2026 | |
Study on pollutant emission characteristics of sludge combustion in municipal wastewater treatment plants under oxygen-enriched conditions
Hefei General Machinery Research Institute Co., Ltd., China
Oxygen-enriched combustion technology, as an efficient and clean combustion technology, shows great potential in the field of sludge disposal by using a high concentration of oxygen (>21%) instead of air as a combustion agent. Firstly, this paper investigates the differences in pollutant emission characteristics between sludge under oxygen-enriched combustion and air combustion conditions. The experimental results showed that the generation of CO was 887 ppm under oxygen-enriched combustion, which was higher than that of 301 ppm under air combustion, and the generation of NO and SO2 were 247 ppm and 71 ppm, which were lower than that of 291 ppm and 100 ppm under air combustion, respectively. Secondly, the effects of different oxygen concentrations on the pollutant emission characteristics of sludge under oxygen-enriched combustion were investigated in this paper. Secondly, the article further investigated the effects of different oxygen concentrations on the emission characteristics of pollutants during oxygen-enriched combustion. The results showed that under the oxygen-enriched combustion condition, the generation of CO showed a tendency of decreasing and then increasing. The lowest CO generation was 631 ppm at 50% oxygen concentration, while the NO and SO2 generation showed a gradual increase at 50% oxygen concentration, with 283 ppm and 79 ppm, respectively; however, in the range of 21% to 50% oxygen concentration, the growth of NO and SO2 generation was significantly lower than that in the range of 50% to 100% oxygen concentration. The growth trend in the range of 50% to 100% oxygen concentration is significantly lower. In summary, oxygen-enriched combustion in an atmosphere with 50 per cent oxygen concentration is more conducive to suppressing the generation of combustion pollutants.
© The Authors, published by EDP Sciences, 2026
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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