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J Environ Manage

Title:		Thermal treatment of medical waste in a rotary kiln
Author(s):		Bujak J;
Address:		"Polish Association of Sanitary Engineers, Division Bydgoszcz, Ruminskiego 6, 85-950 Bydgoszcz, Poland. Electronic address: j.bujak@promont.com"
Journal Title:		J Environ Manage
Year:		2015
Volume:		20150731
Issue:
Page Number:		139 - 147
DOI:		10.1016/j.jenvman.2015.07.048
ISSN/ISBN:		1095-8630 (Electronic) 0301-4797 (Linking)
Abstract:		"This paper presents the results of a study of an experimental system with thermal treatment (incineration) of medical waste conducted at a large complex of hospital facilities. The studies were conducted for a period of one month. The processing system was analysed in terms of the energy, environmental and economic aspects. A rotary combustion chamber was designed and built with the strictly assumed length to inner diameter ratio of 4:1. In terms of energy, the temperature distribution was tested in the rotary kiln, secondary combustion (afterburner) chamber and heat recovery system. Calorific value of medical waste was 25.0 MJ/kg and the thermal efficiency of the entire system equalled 66.8%. Next, measurements of the pollutant emissions into the atmosphere were performed. Due to the nature of the disposed waste, particular attention was paid to the one-minute average values of carbon oxide and volatile organic compounds as well as hydrochloride, hydrogen fluoride, sulphur dioxide and total dust. Maximum content of non-oxidized organic compounds in slag and bottom ash were also verified during the analyses. The best rotary speed for the combustion chamber was selected to obtain proper afterburning of the bottom slag. Total organic carbon content was 2.9%. The test results were used to determine the basic economic indicators of the test system for evaluating the profitability of its construction. Simple payback time (SPB) for capital expenditures on the implementation of the project was 4 years"
Keywords:		Air Pollutants/analysis Carbon Dioxide/*analysis Coal Ash Environment Equipment Design Hospitals Incineration/economics/*instrumentation/methods Medical Waste Medical Waste Disposal/economics/*instrumentation/*methods Organic Chemicals/analysis Temperatur;
Notes:		"MedlineBujak, J eng England 2015/08/05 J Environ Manage. 2015 Oct 1; 162:139-47. doi: 10.1016/j.jenvman.2015.07.048. Epub 2015 Jul 31"