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Characterization of municipal solid waste incineration and flue gas emission under anoxic environment in Tibet Plateau

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Abstract

Waste incineration is a process of full combustion reaction between waste and oxygen at high temperature. It is a new problem whether the special natural environmental conditions of Tibet Plateau, such as low air pressure, low oxygen content, and low temperature, will affect the waste incineration in the plateau area. In this work, the influence of different parameters on MSW incineration efficiency and flue gas emission were investigated. The results showed that the temperatures exhibited a significant impact on the flue gas emission. Under the lower temperature, CO was determined to be the main pollutant. With the increase of temperature, NOx became the main pollutant. The optimal temperature range of flue gas emission was between 800 and 900°C. A slight negative pressure in incinerator was benefit for incineration system safety and flue gas emissions. The optimal range was −50 to 0Pa. Lower oxygen content (3–6%) in the incinerator affected the incineration efficiency and flue gas emission. Meanwhile, the high oxygen content had no obvious impact on the flue gas emission, but the cost increased and the service life of the incinerator was affected. The optimal oxygen content in the incinerator was controlled at 6–8%. Furthermore, the air temperatures, pressures, and oxygen content in the natural environment had no significant effect on MSW incineration process. Increasing the air volume would bring about the increase of N2 in the incinerator. This work provides the basic data support for MSW incineration technology in plateau area.

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All relevant data are within the manuscript and available from the corresponding author upon request. Supplementary information is available at Environmental Science and Pollution Research’s website.

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Acknowledgments

Thanks to Lhasa Shengyun Environmental Protection Company for its support of the experimental site provided in the study. And thank the members of the research group for their contribution to the experiment.

Funding

This work was financially supported by National Key Research & Development Program of China (No.2019YFC1904101), National Natural Science Foundation of China Project (No.52160026;51668056), and Growth Plan Project of Research and Cultivation Fund of Tibet University(No. ZDTSJH19-14).

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Dan Zeng and Guanyi Chen provided the research ideas and experimental equipment. Wenwu Zhou, Peng Zhou, Qiongda Zhuoma, Jing Wang, and Yuechi Che completed the experimental operation and the arrangement and processing of experimental data. A Qiong, Zhiyong Han, Xuebin LV, and Bu Duo revised the article. Wang Yang provided some infrastructures in the experiment.

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Correspondence to Zeng Dan.

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This paper is a study on the detection of flue gas emission from waste incineration plant, not involving human and animal research.

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Highlights

• The organic matter, inorganic matter, recyclable and moisture content of garbage in Lhasa are 28.63%, 13.04%, 58.22%, and 33.8%, respectively.

• Low calorific value of MSW in Lhasa city is 5994kj/kg in rainy season and 7877kj/kg in dry season, with an average of 6935.5kj/kg.

• The concentrations of SO2, CO, HCI, dust, and NOx in the flue gas discharged under the ordinary condition of low anoxic condition are 49.79mg/m3, 5.34mg/m3, 48.22mg/m3, 2.67mg/m3, and 301.78mg/m3 respectively.

• The optimal incineration conditions with low pollutant emission were at temperature 900°C, oxygen content in the range of 6~8% and micro-negative pressure close to 0Pa.

• The contents of Ca in slag and fly ash are the highest, and the contents of Zn, Cu, Pb, and Ba in slag and fly ash are higher.

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Dan, Z., Zhou, W., Zhou, P. et al. Characterization of municipal solid waste incineration and flue gas emission under anoxic environment in Tibet Plateau. Environ Sci Pollut Res 29, 6656–6669 (2022). https://doi.org/10.1007/s11356-021-15977-x

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