Development of an Environmentally Safe Process for Medical Waste Disposal Based on Pyrolysis

Zroychikov, N. A.; Фадеев, С. Н.; Bezruky, P. P.

doi:10.1134/s0040601518110101

Cited by 17 publications

(6 citation statements)

References 6 publications

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“…The main components of medical waste are personal protective equipment, facemasks, aprons/gowns, nitrile gloves, which were mostly made from plastics composed of Polypropylene, Polyethylene, Polyethylene Terephthalate, Polystyrene ( Table 3 ; figure 4 ) ( Windfeld and Brooks, 2015 ; Nirban and Upendra, 2019 ). During pyrolysis, these components start decomposing at 300 °C and maximal is reached around at 400 °C under inert conditions, which releases certain substances like hydrocarbons and some gases (hydrogen, methane, acetylene, ethylene, ethane, propene, Butatriene) ( Qin et al, 2018 ; Zroychikov et al, 2018 ). These gases that evolved during the pyrolysis process were identified and analyzed using a mass spectrometer and their activation energy was found to be about 52.70 kJ/mol.…”

Section: Pyrolysis An Effective Technique For Decomposing the Covid-1mentioning

confidence: 99%

RETRACTED: Pyrolysis: An effective technique for degradation of COVID-19 medical wastes

et al. 2021

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COVID-19 has led to the enormous rise of medical wastes throughout the world, and these have mainly been generated from hospitals, clinics, and other healthcare establishments. This creates an additional challenge in medical waste management, particularly in developing countries. Improper managing of medical waste may have serious public health issues and a significant impact on the environment. There are currently three disinfection technologies, namely incineration, chemical, and physical, that are available to treat COVID-19 medical waste (CMW). This study focuses on thermochemical process, particularly the pyrolysis process to treat medical waste. Pyrolysis is a process that utilizes the instability of organic components in medical waste to convert it into valuable products. Besides, the technique is environmentally friendly, more efficient, requires less landfill capacity, causes lower pollution, and cost-effective. The current pandemic situation generates a high amount of plastic medical waste, which has components like polyethylene (PE), polypropylene (PP), polystyrene (PS), polyethylene terephthalate (PET) and nylon (N). These plastic wastes can be converted into valuable energy products like oil, gas and char through the pyrolysis process. This study provides detailed information about CMW handling, treatments, valuable product generations (biofuels), and proper discharge into the open environment.

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Section: Pyrolysis An Effective Technique For Decomposing the Covid-1mentioning

confidence: 99%

RETRACTED: Pyrolysis: An effective technique for degradation of COVID-19 medical wastes

et al. 2021

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“…The reactor throughput in the gross mass of MW, including moisture and the inorganic components was chosen as a reference value in the calculations. The dry mass of MW according to [12] comprises textiles (25 wt.%), paper (20%), plastics (15%), cotton (11%), plaster (10%), food waste (6%), metals (5%), rubber (3%), glass (2%), desinfectants (2%), and biological wastes (1%). In calculations, the dry matter of MW was considered as a mixture of 20% polypropylene to represent plastics and rubber and 63% cellulose as a model for combustible matter of paper, textiles, and food waste.…”

Section: The Materials Parametersmentioning

confidence: 99%

Gasification in the filtration combustion mode for disposal of medical waste with heat generation

Polianczyk,

Tarasov,

Zaichenko

2024

E3S Web Conf.

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The gasification of medical waste (MW) in a counterflow updraft gasifier with a partial recycle of the generator gas to the combustion zone is considered as applied for MW disposal with a heat generation. The temperature regimes and material flows are assessed for a typical model MW composition with a humidity varied from 0 to 40 wt.%. A procedure for control of the process for varied MW composition is proposed. For a given MW composition and flowrate, the combustion temperature can be controlled to prescribed value 900°C via control of the flowrates of air and and recycled generator gas. Throughout the studied humidity range the generator gas is combustible and can provide heat generation on the aftercombustion stage. The method promises an efficient and energy sustainable MW disposal.

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“…The basic and most commonly used medical waste disposal method is thermal treatment (Liu et al, 2015). Thermal conversion technologies for medical waste disposal include incineration (McKay, 2002), carbonisation/torrefaction (Świechowski et al, 2021), pyrolysis (Zroychikov et al, 2018) and gasification (Kim et al, 2011). The choice of method depends on the composition of the waste.…”

Section: Introductionmentioning

confidence: 99%

Impact of COVID-19 Case Numbers on the Emission of Pollutants from a Medical Waste Incineration Plant

Załuska

Werner-Juszczuk

Gładyszewska-Fiedoruk

2022

Aerosol Air Qual. Res.

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This article examines the correlation between the amount of pollutants emitted from medical waste incinerator plant and the number of COVID-19 infections, based on the example of Podlaskie Voivodeship in Poland. This paper deals with the issues of medical waste management during the COVID-19 pandemic. Thermal processing is characterised as a method of medical waste utilisation. The technological sequence of the medical waste incineration installation and the integrated exhaust gas cleaning system are discussed. The results of studies on the emission of pollutants into the atmosphere during combustion are compared with the number of COVID-19 cases in the same voivodeship to investigate how the coronavirus pandemic affects the amount of medical waste generated, thus the amount of pollutants emitted into the atmosphere. The Pearson's linear correlation coefficient and the Student's t-test are used to verify the results. The analysis results show a statistically significant, moderate positive correlation between the amount of covid waste and the number of COVID-19 cases (0.5140). In turn, there is also a statistically significant moderate correlation between the number of COVID-19 cases and emissions of SO2 (r = 0.6256, p = 0.010), NO x (0.5019, p = 0.048), and HCl (0.5130, p = 0.042). This correlation finding highlights additional costs to the environment and public health as the number of COVID-19 cases increase, which can be taken into account for pandemic planning by governments in the future.

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Development of an Environmentally Safe Process for Medical Waste Disposal Based on Pyrolysis

Cited by 17 publications

References 6 publications

RETRACTED: Pyrolysis: An effective technique for degradation of COVID-19 medical wastes

RETRACTED: Pyrolysis: An effective technique for degradation of COVID-19 medical wastes

Gasification in the filtration combustion mode for disposal of medical waste with heat generation

Impact of COVID-19 Case Numbers on the Emission of Pollutants from a Medical Waste Incineration Plant

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