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Interaction mechanism and pollutant emission characteristics of sewage sludge and corncob co-combustion

Author

Listed:
  • Ni, Zhanshi
  • Liu, Xiang
  • Shi, Hao
  • Tian, Junjian
  • Yao, Yurou
  • Hu, Peng
  • He, Liqun
  • Meng, Kesheng
  • Lin, Qizhao

Abstract

The co-combustion of sewage sludge and biomass has demonstrated significant potential for reducing carbon emissions and realizing the resource utilization of solid waste. In this study, the co-combustion behavior and pollutant emissions of sewage sludge and corncob were systematically investigated using thermogravimetric-Fourier transform infrared spectroscopy-mass spectrometry (TG-FTIR-MS) and a fixed-bed reactor. When the corncob blending ratio reached 30 %, the ignition temperature was 179.01 °C lower than that of sewage sludge, and the comprehensive combustion index increased by 13.92 times. The corncob in the mixed fuel dominated the volatiles' release and combustion process. The interaction strength increased as the corncob blending ratio increased. When the corncob blending ratio reached 70 %, it promoted the thermal weight loss process of sewage sludge. The release rate of CO2 increased as the biomass ratio increased, and a 30 % corncob content could inhibit CO2 emissions. Simultaneously, the interaction between sewage sludge and corncob inhibited the emissions of CO and NO during the co-combustion process, improving the combustion efficiency. This study provides theoretical support for developing the fuel value of sewage sludge, improving the amount of solid waste collaborative disposal, and realizing the leading carbon peak in thermal power industry.

Suggested Citation

  • Ni, Zhanshi & Liu, Xiang & Shi, Hao & Tian, Junjian & Yao, Yurou & Hu, Peng & He, Liqun & Meng, Kesheng & Lin, Qizhao, 2024. "Interaction mechanism and pollutant emission characteristics of sewage sludge and corncob co-combustion," Renewable Energy, Elsevier, vol. 231(C).
    • Handle: RePEc:eee:renene:v:231:y:2024:i:c:s0960148124010292
    DOI: 10.1016/j.renene.2024.120961
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    References listed on IDEAS

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