Incineration technology for managing biomedical wastes

Velzy, Charles O.; Feldman, J.; Trichon, M.

doi:10.1016/0734-242x(90)90004-7

Cited by 9 publications

(6 citation statements)

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“…It affects the incinerator design regarding the amount of supplementary fuel or the oxygen requirements needed to achieve proper incineration temperature (Velzy et al, 1990). Hirayama (1981) found that the optimum lower CV needed for complete self-sustained incineration is 900-1100 kcal/kg of waste.…”

Section: Table 12mentioning

confidence: 99%

Hospital waste management in El-Beheira Governorate, Egypt

El-Salam

2010

Journal of Environmental Management

151

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Section: Table 12mentioning

confidence: 99%

Hospital waste management in El-Beheira Governorate, Egypt

El-Salam

2010

Journal of Environmental Management

151

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“…Incinerating HW offers a 70% reduction in mass and 90% reduction in volume of the waste (Stegemann et al, 1995) and degrades the infectious materials (Velzy et al, 1990). However, this practice generates solid residues, such as bottom and fly ash, as well as air pollution control residues with high levels of heavy metals, including lead, copper, chromium, nickel, zinc and cadmium (Mulder 1996; Stucki and Jakob, 1997), inorganic salts and other organic compounds (Dong et al, 2002; Linak et al, 1993).…”

Section: Introductionmentioning

confidence: 99%

Characterization of bottom ash from two hospital waste incinerators in Rabat, Morocco

et al. 2013

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The uncontrolled disposal of bottom ash generated by the incineration units of hazardous and infected wastes in developed countries are the main cause of significant damage, such as contamination of the soil, as well as surface and underground waters, which may put both the environment and public health at risk. In Morocco, little information is available on the chemical properties of the resulting ashes. In this study, 16 hospital waste ash samples were collected from the incinerators of the two main hospitals in Rabat: Ibn Sina and Cheikh Zayd. A series of tests was conducted, including particle size distribution, mineralogical and chemical composition, and heavy metal leaching behaviour. The results showed that the samples were composed mainly of P2O5 (18%), SiO2 (17%), Na2O (16%), CaO (14%) and SO3 (10%). Moreover, chemical analysis clearly demonstrated that medical waste (MW) contains large amounts of waste generated by domestic activities in the hospital, with a lack of sorting system in the monitoring of MW. Furthermore, the ashes contained high concentrations of heavy metals such as zinc, lead, chromium and nickel with a vast range of 0.5-25071 mg/kg. Leaching tests showed that the extracted amounts of all the heavy metals were lower, with concentrations < 2.85 mg/kg. Comparison of the corresponding heavy metal concentrations with the limit values set by the Council Decision 2003/33/EC allowed us to conclude that bottom ashes meet the waste acceptance criteria regarding these heavy metals.

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“…Nowadays, incineration has been proved to be the best option for medical waste (MW) treatment as it could reduce the MW volume up to 90% and degrade the infectious materials effectively [1]. In China, especially during SARS (Severe Acute Respiratory Syndrome), numerous MW incineration plants were built to treat the highly infectious MW.…”

Section: Introductionmentioning

confidence: 99%

Influence of supercritical water treatment on heavy metals in medical waste incinerator fly ash

Zhang

Zhao

2009

Journal of Hazardous Materials

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a b s t r a c tIn this work, medical waste (MW) incinerator fly ashes from different types of incinerators were subjected to supercritical water (SCW) and SCW + H 2 O 2 (SCWH) treatments. Sequential extraction experiments showed that, after SCW treatment, heavy metals in exchangeable and carbonate forms in the ashes could be transferred into other relatively stable forms, e.g., Ba and Cr into residual fraction, Cu and Pb into organic matter fraction. SCWH treatment could stabilize heavy metals in Fe-Mn oxides and residual fractions. However, the behavior of As was quite different from heavy metals, which could be leached out from residue fraction after SCW and SWCH treatments. The leached As tended to absorb onto Fe-Mn oxides and organic matters under near neutral environment, but it could react with Ca 2+ at lower pH, increasing the mobility of this element. Therefore, it is necessary to neutralize acidic ash to near neutral condition before subjecting it to SCW and SCWH treatments so as to effectively stabilize hazardous elements in the ash. Consequently, it is believed that SCWH treatment is an effective alternative for hazardous elements detoxification in MW fly ash.

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Incineration technology for managing biomedical wastes

Cited by 9 publications

References 1 publication

Hospital waste management in El-Beheira Governorate, Egypt

Hospital waste management in El-Beheira Governorate, Egypt

Characterization of bottom ash from two hospital waste incinerators in Rabat, Morocco

Influence of supercritical water treatment on heavy metals in medical waste incinerator fly ash

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