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Emission Characteristics of Pollution Gases from the Combustion of Food Waste

Author

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  • Haili Liu

    (School of Energy and Mechanical Engineering, Hunan University of Humanities, Science and Technology, Loudi 417000, China)

  • Xu Zhang

    (School of Energy and Mechanical Engineering, Hunan University of Humanities, Science and Technology, Loudi 417000, China)

  • Qingchao Hong

    (School of Energy and Mechanical Engineering, Hunan University of Humanities, Science and Technology, Loudi 417000, China)

Abstract

The emission characteristics of pollution gases produced via the combustion of food waste were studied through a laboratory-scale electrically heated tube furnace. The results showed that the pollution gases generated from the combustion of food waste were CO, H 2 and NO x . Each emission curve of CO had a peak. When the combustion temperature rose from 400 °C to 1000 °C, the peak first increased (from 400 °C to 700 °C) and then decreased (from 800 °C to 1000 °C). However, the burnout time shortened with the increase in temperature. Therefore, food waste should be combusted at a higher temperature than 700 °C from the perspective of reducing CO emissions. The emissions of H 2 were similar to those of CO. In other words, if CO emissions increased, H 2 emissions also increased in the same temperature range. Some NO x emission curves had two peaks (the combustion of cooked rice at 1000 °C; the combustion of vegetable leaves in the temperature range of 600 °C to 1000 °C). The higher the combustion temperature, the higher the second NO x emission peak. NO x emissions from the combustion of cooked rice were greater in the temperature range of 400 °C to 500 °C, whereas for vegetable leaves, that temperature range was from 600 °C to 700 °C. Hence, from the viewpoint of reducing pollution gases, food waste should be combusted at a higher temperature than 700 °C.

Suggested Citation

  • Haili Liu & Xu Zhang & Qingchao Hong, 2021. "Emission Characteristics of Pollution Gases from the Combustion of Food Waste," Energies, MDPI, vol. 14(19), pages 1-11, October.
    • Handle: RePEc:gam:jeners:v:14:y:2021:i:19:p:6439-:d:652056
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    References listed on IDEAS

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