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<p>Infected biomedical wastes, including cotton and plastic syringe waste, pose environmental problems. These types of waste were processed to remove pathogens, recycled, and then reused. In this study, the wastes were processed through pyrolysis to obtain char, which was then mixed with sawdust. Fuel pellets were prepared by combining the char with dextrin and cassava binders. All the pellets underwent heat treatment for stability, DSC analysis to evaluate their calorific value and ultimate, proximate analysis. The maximum calorific value of the pellets is 221&#xa0;J&#xa0;g<sup>−1</sup>, and all the pellets contained the required volatile matter (VM) and fixed carbon content, which are essential parameters for any fuel. The required amounts of carbon, hydrogen, nitrogen, sulfur, and oxygen were present in the fuel pellets. The fuel pellets were incorporated into the fireworks chemical composition with the aim of replacing sulfur, and crackers were made in the fireworks industry. The crackers were tested for quality by measuring the noise level during their bursting. It was concluded that biomedical wastes can be used to replace up to 60% of the sulfur in fireworks crackers, which helps reduce sulfur dioxide emissions.</p>

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Thermal analysis of fuel pellets derived from the biomedical wastes by hydrothermal and pyrolysis method for replacing sulfur in fireworks flash powder composition

  • 期刊论文

  • 发表日期：

    2026年7月30日

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  • A. Azhagurajan,
  • R. Saravana Sathiya Prabhahar,
  • J. Thanikachalam,
  • G. Rahini

摘要

Infected biomedical wastes, including cotton and plastic syringe waste, pose environmental problems. These types of waste were processed to remove pathogens, recycled, and then reused. In this study, the wastes were processed through pyrolysis to obtain char, which was then mixed with sawdust. Fuel pellets were prepared by combining the char with dextrin and cassava binders. All the pellets underwent heat treatment for stability, DSC analysis to evaluate their calorific value and ultimate, proximate analysis. The maximum calorific value of the pellets is 221 J g−1, and all the pellets contained the required volatile matter (VM) and fixed carbon content, which are essential parameters for any fuel. The required amounts of carbon, hydrogen, nitrogen, sulfur, and oxygen were present in the fuel pellets. The fuel pellets were incorporated into the fireworks chemical composition with the aim of replacing sulfur, and crackers were made in the fireworks industry. The crackers were tested for quality by measuring the noise level during their bursting. It was concluded that biomedical wastes can be used to replace up to 60% of the sulfur in fireworks crackers, which helps reduce sulfur dioxide emissions.