Emission Characteristics of Pollution Gases from the Combustion of Food Waste

Haili Liu, Xu Zhang and Qingchao Hong
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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

Energies, 2021, vol. 14, issue 19, 1-11

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.

Keywords: pollution gases; food waste; combustion; emission characteristics (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2021
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