hospital waste managemnt
TRANSCRIPT
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HOSPITAL WASTE MANAGEMNT
ELAMATHI.TIII-MBBS
CELESTRIANS
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Definitions• Health care waste: Any waste generated
consequent to health care activity including those at home
• Biomedical Waste: As per Biomedical waste (Management and Handling)Rules 1998 of India, it is def. as a waste generated during diagnosis, treatment, immunization of human beings or animals or in research activities pertaining thereto or in the production or testing of biologicals.
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Sources of health care waste:• Government & private
hospitals • Nursing homes• Physician’s & Dentist’s
clinics• Dispensaries• Medical research &
training establishments• Mortuaries • Blood banks• Laboratories• Vaccinating centers• Bio-technology institutions
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Classification of Health care waste
• Infectious waste• Pathological
waste• Sharps• Pharmaceutical
waste• Genotoxic waste• Chemical waste• Waste with high
content of heavy metals
• Pressurized containers
• Radioactive waste
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Health Hazards of Health care waste: Who’s at Risk ?• Doctors and nurses• Patients and visitors• Hospital support staff• Waste collection and
disposal staff• General public and• the Environment
Health hazards :• Hazards from infectious
waste & sharps• Hazards from chemical
& pharmaceutical waste
• Hazards from genotoxic waste
• Hazards from radio-active waste
• Public sensitivity
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Treatment & disposal of health care waste:
• Incineration• Chemical
disinfection• Wet & dry thermal
treatment• Microwave
irradiation• Land disposal • inertization
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Incineration• It is a high temperature dry oxidation process, that reduces
organic & combustible waste to inorganic incombustible waste. This process requires no pre- treatment
• This process reduces the waste-volume and weight.Suitable waste:•Low heating volume (>2,000 kcal/kg) & (>3,500 kcal/kg)•Combustible matter >60%•Non-combustible solid <5%•Non-combustible fine <20%•Moisture content <30%
Unsuitable waste:
•Large amnt. of reactive chemical waste•Pressurized gas containers•Ag salts photographic or radioactive waste•Halogenated waste eg., PVC•Wastes with high Hg & Cd content•Sealed ampules & ampules containing heavy metals
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Types of incinerator:
•Double-chamber pyrolytic incinerators
•Single-chamber furnaces
•Rotary kilns operating at high temp.
Incinerator simpler diagram:
Double chambered incinerator:
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Chemical disinfection:• In this process chemicals are added to waste• This is the most suitable method for treating liquid waste
e.g.., blood, urine, stool etc. & Solid waste e.g., microbial cultures, sharps etc.
• The types of chemicals used for disinfection of health-care waste are mostly aldehydes, chlorine compounds, ammonium salts, and phenolic compounds.
• The use of ozone (O3) for disinfection of waste is currently being investigated.
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Wet thermal treatment(steam disinfection):
•Shredded infectious waste-high temperature- high pressure steam •This process is similar to autoclaving
Screw-feed technology:
•Dry thermal disinfection process•Waste shredded- rotating auger-heated
Wet and dry thermal treatment:
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Microwave irradiation:•Microwave of frequency-2450 MHz, wavelength- 12.24 nm•Water present in the waste is heated by microwave•Mechanism of disinfection- heat conduction
Land disposal: •Acceptable route of disposal•Two types:open dumps sanitary landfills•Advantages of sanitary landfills over open dumpsGeological isolation of wasteAppropriate engineering preparation Organized depositDaily coverage of waste
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Landfill image
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Bio-Medical waste management(BMW) in India:
• Bio-Medical waste (Management and Handling) rule 1998, prescribed by the Ministry of Environment and Forests, Govt. of India, came into force on 20th July 1998.
• This rule applies to those who generate, collect, receive, store, dispose, treat or handle Bio-Medical waste in any manner.
• Generators: Administrative medical officer of health care facilities.
• Occupier/Operator : Authorized person of any health care facility- who deals with BMW in accordance with rules
• Waste audit: A survey of wastes generated in different health care settings is a basic- pre-requistte for planning & implementing a waste management endeavor.
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Schedule-IClassification and management of BMW
in IndiaCategory Waste Type Treatment and Disposal
Method
Category 1 Human Wastes (Tissues, organs, body parts Incineration / deep burial
Category 2 Animal Waste Incineration / deep burial
Category 3 Microbiology and Biotechnology waste
Autoclave/microwave/incineration
Category 4 Sharps
Disinfection (chemical treatment)+/autoclaving/microwaving and mutilation shredding
Category 5 Discarded Medicines and Cytotoxic Drugs
Incineration/ destruction and drugs disposal in secured landfills
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Schedule-I ( contd.,)Category Waste Type Treatment and Disposal Method
Category 6
Contaminated solid waste(Items contaminated with blood & body fluids including cotton, dressings, soiled plaster casts, lines, beddings ,etc.)
Incineration/autoclaving / microwaving
Category 7 Solid waste (disposable items other than sharps)
Disinfection by chemical treatment+ microwaving/autoclaving & mutilation shredding
Category 8
Liquid waste (generated from laboratory washing, cleaning, housekeeping and disinfecting activity)
Disinfection by chemical treatment+ and discharge into the drains
Category 9 Incineration ash Disposal in municipal landfill
Category10 Chemical Wastes (liquid & solid)Chemical Treatment + and discharge in to drain for liquids and secured landfill for solids
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Schedule-IIColour coding and type of container for
disposal of bio-medical wastes:CATEGORIES- 5,9 AND 10 (SOLID)
CATEGORIES- 3,6 AND 7
CATEGORIES- 1,2,3 AND 6
CATEGORIES- 4 AND 7
SEGREGATION
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COLOR CODE TYPE OF CONTAINER
WASTE CATEGORY
TREATMENT OPTIONS
Yellow Plastic bags 1, 2, 3 and 6 Incineration/deep burial
Red Disinfected container/plastic
bag
3, 6 & 7 Autoclaving/Micro Waving/Chemical
treatment
Blue/white transparent
Plastic bags/puncture
proof container
4 & 7 Autoclaving/Micro waving/chemical
treatment, Destruction & shredding
Black Plastic bag 5, & 9, AND 10 (SOLID)
Disposal in secured land fills
Colour coding as per schedule-II
Waste collection bags for waste types needing incineration shall not be made of chlorinated plasticsCategory 8,10 (liquid) does not require containers/bagsCategory 3 if disinfected locally need not be in containers/bags
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Categories of Bio-Medical Waste in India
Mnemonics- HAM Was Discarded Soil LICking
H - Human anatomical WastesA - Animal WastesM - Microbiology and Biotechnology WasteWas - waste SharpsDiscarded - Discarded medicines and cytotoxic WastesS - Solid wastes (Contaminated with blood)S - Solid waste (disposables) other than sharpsL - Liquid wasteI - Incineration wasteC - Chemicals waste
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Schedule – IIILabel for Bio-Medical Waste Containers/
Bags
Bio-Hazard CytotoxicHandle with Care
Note: Label shall be non-washable and prominently visible
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SCHEDULE -VI
SCHEDULE FOR WASTE TREATMENT FACILITIES LIKE INCINERATOR/ AUTOCLAVE/ MICROWAVE SYSTEM
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The contravention of the Act , Rules, Orders & directions may
lead to legal action• For failure or continued contravention a
fine @ Rs.5000 /Day may be charged.
• The punishment may lead to the imprisonment up to 5 years with fine up to Rs. 1 lakh.
• The failure or the contravention continues beyond one year, the imprisonment may be extended up to 7 years.
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conclusion• Thus refuse disposal cannot be solved without public
education.• Individual participation is required.• Municipality and government should pay importance to
disposal of waste economically.• Thus educating and motivating oneself first is important
and then preach others about it.• Start disposing waste first from within your home, then
outside home, then neighborhood, then your street, your area, city and then the nation and the world.
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LET THE WASTE OF THE “SICK” NOT CONTAMINATE THE LIVES OF
“THE HEALTHY”.
K.park
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