Abstract
In this work, samples of components usually present in healthcare waste, such as cotton, diapers, transfusion tubes, surgical gloves, examination gloves, adhesives, surgical masks, urine bag collectors, serum bottles and syringes, were subjected to alkaline hydrolysis or autoclaving and the effects of these treatments were assessed. Both treatments were carried out at 135 °C, and the weight loss and the carbon loss of the components as well as the total organic carbon and the chemical oxygen demand in the effluents were determined. The biodegradability of effluents was assessed by measuring the biochemical oxygen demand after 5 days. Alkaline hydrolysis caused appreciable degradation in most of the components, with the adhesives and the diapers having the highest weight losses and carbon losses. Components made with low-density polyethylene, high-density polyethylene and polypropylene showed good chemical resistance with 2 M NaOH solution. The effluents obtained after alkaline treatment of healthcare waste are hazardous due to their very high alkalinity. The effluent obtained after treatment of a mixture of all components using a 2 M NaOH solution was biodegradable with the following parameters: 6.5 g C/l of total organic carbon, 29.8 g O2/l of chemical oxygen demand and 14.9 g O2/l of biochemical oxygen demand after 5 days. Although the autoclaving treatment degraded the components much less than alkaline hydrolysis, the effluents obtained from some components showed an appreciable organic load.
Similar content being viewed by others
References
American Public Health Association (APHA) (1998) Standard methods for the examination of water and wastewater, 20th edn. American Public Health Association (APHA), Washington DC
Bendak A, El-Marsafi SM (1991) Effects of chemical modifications on polyester fibres. J Islam Acad Sci 4(4):275–284
Blazevska-Gilev J, Spaseska D (2007) Chemical recycling of poly(vinyl chloride): alkaline dechlorination in organic solvents and plasticizer leaching in caustic solution. J Univ Chem Technol Metall 42(1):29–34
Blenkharn JI (2006) Medical wastes management in the south of Brazil. Waste Manag 26:315–317
Deng N, Zhang Y, Wang Y (2008) Thermogravimetric analysis and kinetic study on pyrolysis of representative medical waste composition. Waste Manag 28:1572–1580
Diaz LF, Eggerth LL, Enkhtsetseg Sh, Savage GM (2008) Characteristics of healthcare wastes. Waste Manag 28:1219–1226
Ehrenstein GW (2001) Polymeric materials. Structure, properties, applications. Gardner Publications Inc, Cincinnati, Munich
EN 13137:2001 Characterisation of Waste. Determination of total organic carbon (TOC)
EN 1484:1997 Water analysis. Determination of total organic carbon (TOC) and dissolved organic carbon (DOC)
Franka E, El-Zoka AH, Hussein AH, Elbakosh MM, Arafa AK, Ghenghesh KS (2009) Hepatitis B virus and hepatitis C virus in medical waste handlers in Tripoli, Libya. J Hosp Infect 72:258–261
Gu X, Raghavan D, Nguyen T, VanLandingham MR, Yebassa D (2001) Characterization of polyester degradation using tappingmode atomic force microscopy: exposure to alkaline solution at room temperature. Polym Degrad Stab 74:139–149
Gupta S, Boojh R (2006) Report: biomedical waste management practices at Balrampur Hospital Lucknow, India. Waste Manag Res 24:584–591
Gupta VK, Prasad R, Kumar A (2003) Preparation of ethambutol–copper (II) complex and fabrication of PVC based membrane potentiometric sensor for copper. Talanta 60:149–160
Health Care Without Harm (2007) Non-incineration medical waste treatment technologies in Europe. A resource for hospital administrators, facility managers, health care professionals, environmental advocates and community members. Health Care Without Harm. http://www.noharm.org
Kalambura S, Voća N, Krička T, Ŝindrak Z, Ŝpehar A, Kalambura S (2011) High-risk biodegradability waste processing by alkaline hydrolysis. Arch Ind Hyg Toxicol 62:249–253
Kao C, Cheng W, Wan B (1998) Investigation of alkaline hydrolysis of polyethylene terephthalate by differential scanning calorimetry and thermogravimetric analysis. J Appl Polym Sci 70:1939–1945
Karayannidis GP, Chatziavgoustis AP, Achilias DS (2002) Poly(ethylene terephthalate) recycling and recovery of pure terephthalic acid by alkaline hydrolysis. Adv Polym Technol 21(4):250–259
Knill CJ, Kennedy JF (2003) Degradation of cellulose under alkaline conditions. Carbohydr Polym 51:281–300
Kumar S, Guria C (2005) Alkaline hydrolysis of waste poly(ethylene terephthalate): a modified shrinking core model. J Macromol Sci Part A Pure Appl Chem 42:237–251
Lee CC, Huffman GL (1996) Medical waste management/incineration. J Hazard Mater 48:1–30
Manyele SV, Anicetus H (2006) Management of medical waste in Tanzanian hospitals. Tanzan Health Res Bull 8(3):177–182
Murphy RG, Scanga JA, Powers BE, Pilon JL, VerCauteren KC, Nash PB, Smith GC, Belk KE (2009) Alkaline hydrolysis of mouse-adapted scrapie for inactivation and disposal of prion-positive material. J Anim Sci 87:1787–1793
Park H, Lee K, Kim M, Lee J, Seong S, Ko G (2009) Detection and hazard assessment of pathogenic microorganisms in medical wastes. J Environ Sci Health, Part A 44:995–1003
Pruss A, Giroult E, Rushbrook P (1999) Safe management of wastes from health activities. World Health Organization, Geneva
Shin S, Yoshioka T, Okuwaki A (1998) Dehydrochlorination behavior of rigid PVC pellet in NaOH solutions at elevated temperature. Polym Degrad Stab 61:349–353
Shinee E, Gombojav E, Nishima A, Hamajima N, Ito K (2008) Healthcare waste management in the capital city of Mongolia. Waste Manag 28:435–441
Sukandar S, Yasuda K, Tanaka M, Aoyama I (2006) Metals leachability from medical waste incinerator fly ash: a case study on particle size comparison. Environ Pollut 144:726–735
Taguchi F, Tamai Y, Uchida K, Kitajima R, Kojima H, Kawaguchi T, Ohtani Y, Miura S (1991) Proposal for a procedure for complete inactivation of the Creutzfelt-Jakob disease agent. Arch Virol 119:297–301
Tamplin SA, Davidson D, Powis B, O`Leary Z (2005) Issues and options for the safe destruction and disposal of used injection materials. Waste Manag 25:655–665
Taylor DM, Fernie K, McConnell I (1997) Inactivation of the 22A strain of scrapie agent by autoclaving in sodium hydroxide. Vet Microbiol 58:87–91
Thacker H, Leon (2004) Carcass disposal: a comprehensive review. National Agricultural Biosecurity Center, Kansas State University
Acknowledgments
S.C. Pinho thanks the Fundação para a Ciência e Tecnologia for the fellowship SFRD/BD/48956/2008, the Project PTDC/SAU-SAP/114855/2009 and Anthony Danko for his corrections to the manuscript.
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Pinho, S.C., Almeida, M.F. & Nunes, O.C. Effects of alkaline hydrolysis and autoclaving on inorganic components present in healthcare waste. Int. J. Environ. Sci. Technol. 12, 1191–1200 (2015). https://doi.org/10.1007/s13762-014-0503-5
Received:
Revised:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s13762-014-0503-5