Date post: | 22-Jan-2018 |
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Contents :
• Introduction.
• WHO statistics.
• SOURCE OF
BOMEDICAL
WASTE.
• HAZARDS
EFFECT
EXISTENCE.
• Management.
• conclusion.
• References.
Introduction
• Waste: Waste is any substance which is discarded after primary use, or it is worthless, defective and of no use. eg. municipal solid waste, hazardous waste, wastewater (such as sewage, which contains bodily wastes (feces and urine) and surface runoff), radioactive waste.
• Biological waste:Waste generated during the diagnosis, testing, treatment, research or production of biological products for humans or animals (WHO).
Wastes
Solid wasteLiquid Waste
Gaseous Waste
Sources of Bio-Medical Waste
Major Sources
Hospitals LabsResearch
centersAnimal
researchBlood banksNursing
homesMortuariesAutopsy
centers
Minor sources
Clinics
Dental clinics
Home care
Cosmetic clinics
Paramedics
Funeral services
Institutions
Hazardous health care waste can result in
1.Infection
2. Genotoxicity and Cytotoxicity
3. Chemical toxicity
4.Radioactivity hazards.
5.Physical injuries .
Infection
The infectious agents enter into the body through :
Puncture Abrasion Cut in the skin Through mucous
membranes By inhalation and
ingestion.
Genotoxicity and Cytotoxicity
• Irritant to skin and eyes
E.g. alkylating agent, intercalating
agent
• Carcinogenic and Mutagenic
e.g. Secondary neoplasia due to
chemotherapy
Chemical Toxicity
• Many drugs are hazardous
• May cause intoxication , burns, poisoning
on exposure
Radioactivity Hazards
• Radioactive waste exposure
may cause headache,
dizziness, vomiting,
genotoxicity and tissue
damage.
• Visual impact of the anatomical
waste, recognizable body parts.
How did BMW come into
Existence
• In the late 1980’s
– Items such as used syringes washed up on several East Coast beaches USA
– Concern about HIV and HBV virus infection
– Lead to development of Biomedical Waste Management Law in USA.
• However in India the seriousness about the management came into lime light only after 1990’s.
Bio-Medical Waste Flow Chart
In House Segregation(Collection, Segregation Packing
in Color Coded Poly Bags)
Common Storage Point
At
Hospitals
Transportation (Approved Special Vehicle)
Unloading and Temp
Storage at CBWTF
Treatment(Incineration, Autoclaving
and Shredding)
Disposal
( Recycling & Landfill)
Waste Water
to ETP
Re Use
Generator (HOSPITALS)
COLOR WASTE TREAT
Yellow Human & Animal anatomical waste / Micro-biology waste and soiled cotton/dressings/linen/beddings etc.
Incineration/DB/
Red Tubings, Catheters, IV sets. Autocl/microwav/chemical treatment
Blue / White
Waste sharps( Needles, Syringes, Scalpels, blades etc. )
Autocl/microwav/chemical treatment/destruction/shredding
Black Discarded medicines/cytotoxic drugs,Incineration ash, Chemical waste.
Disposal in land fields
HOW TO MANAGE BMW
1. Survey of waste generated
2. reduction at source .
3. Segregation of hospital waste.
4. Collection & Categorization of waste.
5. Storage of waste.
6. Transportation of waste.
7. Treatment of waste.
Source Reduction
• Source Reduction : ways to lessen
the amount of material.
• Segregation : keeping noninfectious
waste out of the infectious waste stream.
• Minimization: reduce or eliminate
waste at the source.
• Engineering controls: methods
to reduce quantity of waste(smaller
containers).
Steps to Manage Hazardous Wastes before Disposal
1. Know what hazards you
have.
2. Purchase smallest
quantity needed, and don’t
purchase hazardous
materials if safe alternative
exists .
3. Limit use and access to
trained persons with
personal protective gear.4. Use Engineering Controls
such as Ventilation, Hoods for Select Hazards.
5. Recycle Products When Possible.
Label of Hazard Warnings
toxic
biohazard
inflammable
corrosiveRadiation
Gas bottle explosive
Health danger
Collection, transportation,
storage (within the hospital)
• Waste collected and stored in thick non-
corrosive disposable plastic bags or containers
of specific colour code.
• The waste in bags or containers should be stored
in a separate area, room, or building of a size
appropriate to the quantities of waste produced
and the frequency of collection.
• Health care waste should be transported within
the hospital or other facility by means of hand
cart wheeled trolley .
TRANSPORTATION
• Transportation of BMW can be divided into internal and external transportation.
• INTERNAL: it is for yellow ,red ,blue and white bags.
• EXTERNAL: it is for the general waste collected in the black coloured plastic bags.
DISPOSAL METHODS OF BIO-MEDICAL WASTES
• Incineration
• Chemical disinfection
• Inertisation
• Autoclave
• Encapsulation
• Microwave
• Shredder
• Plasma pyrolysis
• Deep burial
ANNUAL REPORT
• To be submitted to the prescribed authority by 31 January every year
• Name of the occupier with Address
• Categories of waste generated and Quantity [monthly average] basis:
• Name of treatment facility with Address
• Category-wise quantity of waste treated
• Mode of treatment with details:
• Any other information
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.
• PPE does not replace proper procedures and techniques, consider all as hazard.
References:
• Luxton R., Biomedical science Explained
clinical biochemistry, Rep. edition- New york,
Butterworth HEINEHANN 1999.