Recovery of Pyrolytic Oil from Thermal Pyrolysis of Medical Waste

Som, Uday; Rahman, F.; Hossain, Syed Shahadat

doi:10.21272/jes.2018.5(2).h2

Cited by 12 publications

(6 citation statements)

References 5 publications

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“…Inorganic components in medical wastes, like metals and glass, get converted into a glassy aggregate ( Zafar, 2019 ). Pyrolysis is a thermal treatment of medical wastes in the absence of oxygen, which can produce gaseous and liquid products that can be used as a source of chemicals and fuels ( Som et al, 2018 ). Anaerobic digestion is an environmentally friendly technique used for biochemical treatment of wastes and produce biogas that can be used for heat and power generation ( Abdel Daiem et al, 2018 ; Said et al, 2020 ).…”

Section: Discussionmentioning

confidence: 99%

Sustainable waste management of medical waste in African developing countries: A narrative review

et al. 2021

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Africa is the second populous continent, and its population has the fastest growing rate. Some African countries are still plagued by poverty, poor sanitary conditions and limited resources, such as clean drinking water, food supply, electricity, and effective waste management systems. Underfunded healthcare systems, poor training and lack of awareness of policies and legislations on handling medical waste have led to increased improper handling of waste within hospitals, healthcare facilities and transportation and storage of medical waste. Some countries, including Ethiopia, Botswana, Nigeria and Algeria, do not have national guidelines in place to adhere to the correct disposal of such wastage. Incineration is often the favoured disposal method due to the rapid diminishment of up to 90% of waste, as well as production of heat for boilers or for energy production. This type of method – if not applying the right technologies – potentially creates hazardous risks of its own, such as harmful emissions and residuals. In this study, the sustainability aspects of medical waste management in Africa were reviewed to present resilient solutions for health and environment protection for the next generation in Africa. The findings of this research introduce policies, possible advices and solutions associated with sustainability and medical waste management that can support decision-makers in developing strategies for the sustainability by using the eco-friendly technologies for efficient medical waste treatment and disposal methods and also can serve as a link between the healthcare system, decision-makers, and stakeholders in developing health policies and programmes.

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Section: Discussionmentioning

confidence: 99%

Sustainable waste management of medical waste in African developing countries: A narrative review

et al. 2021

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“…On the other hand, thermal cracking is not a mature MWTT, while it is not applied in large scale for MWT, and further pilot scale investigation is required. Similarly, Som et al [154] produced pyrolytic oil by thermal pyrolysis of plastic fraction MW at 200-300 • C. The pyrolytic oil's density was 840 kg/m 3 , the HHV was 24.2 MJ/kg and the flash point is 39 • C. The maximum yield reached 53%, which is a promising result. Pyrolytic oil could substitute commercial diesel since they have similar HHV.…”

Section: Energy Fuels and Materials Produced By Medical Waste Treatmentmentioning

confidence: 95%

Medical Waste Treatment Technologies for Energy, Fuels, and Materials Production: A Review

2021

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The importance of medical waste management has grown during the COVID-19 pandemic because of the increase in medical waste quantity and the significant dangers of these highly infected wastes for human health and the environment. This innovative review focuses on the possibility of materials, gas/liquid/solid fuels, thermal energy, and electric power production from medical waste fractions. Appropriate and promising treatment/disposal technologies, such as (i) acid hydrolysis, (ii) acid/enzymatic hydrolysis, (iii) anaerobic digestion, (vi) autoclaving, (v) enzymatic oxidation, (vi) hydrothermal carbonization/treatment, (vii) incineration/steam heat recovery system, (viii) pyrolysis/Rankine cycle, (ix) rotary kiln treatment, (x) microwave/steam sterilization, (xi) plasma gasification/melting, (xii) sulfonation, (xiii) batch reactor thermal cracking, and (xiv) torrefaction, were investigated. The medical waste generation data were collected according to numerous researchers from various countries, and divided into gross medical waste and hazardous medical waste. Moreover, the medical wastes were separated into categories and types according to the international literature and the medical waste fractions’ percentages were estimated. The capability of the examined medical waste treatment technologies to produce energy, fuels, and materials, and eliminate the medical waste management problem, was very promising with regard to the near future.

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“…Moreover, the energy recovery mechanism is an important alternative for polymer recycling, considering the high energy content of this material 11 . Among the technologies available, pyrolysis is considered an effective technique to obtain liquid fuel from polymers in the HCW 6,7,9,12 . By adopting such methods, it becomes possible to mitigate the environmental impact of HCW while generating valuable resources.…”

Section: Introductionmentioning

confidence: 99%

“…Given that the HCW has a high polymer content, [5][6][7][8] there is an urgent need for a cleaner and safer disposal and treatment of these medical plastic wastes. 9 The polymers that exist in the HCW could be used as a cheap chemical and energy raw materials.…”

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confidence: 99%

Unlocking energy potential: Investigating thermal degradation and kinetic modeling of health‐care waste polymers for enhanced pyrolysis conversion

Lourenço,

Bertuol,

Salau

2023

J of Applied Polymer Sci

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Recently, the main polymers present in the health‐care waste (HCW) of a Brazilian university hospital were identified, revealing a composition of polypropylene (85%), high‐density polyethylene (6%), polystyrene (5%), and cellulose (4%). Recognizing the potential for these materials to generate energy through pyrolysis, this study aimed to assess the thermal degradation of the HCW polymers and their respective polymer mixture using thermogravimetric analysis. Thermalgravimetric analysis encompassed three heating rates (5, 10, and 20°C min−1). The kinetic parameters of thermal degradation were estimated using the first‐order reaction model. Friedman differential isoconversional method, as well as Ozawa, Flynn–Wall–Ozawa, and Kissinger–Akahira–Sunose integral isoconversional methods, were applied to obtain the kinetic parameters, which can predict the thermal degradation kinetics of the polymers in thermal conversion process. Through statistical evaluation of the parameter estimation, it was demonstrated that the proposed methodology yielded fitted models for the experimental data on HCW. These models may be implemented in designing pyrolysis reactors that convert these polymers into energy, thereby mitigating environmental pollution.

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Recovery of Pyrolytic Oil from Thermal Pyrolysis of Medical Waste

Cited by 12 publications

References 5 publications

Sustainable waste management of medical waste in African developing countries: A narrative review

Sustainable waste management of medical waste in African developing countries: A narrative review

Medical Waste Treatment Technologies for Energy, Fuels, and Materials Production: A Review

Unlocking energy potential: Investigating thermal degradation and kinetic modeling of health‐care waste polymers for enhanced pyrolysis conversion

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