Hazardous waste management involves identifying waste generators and types of waste, quantifying waste amounts, and determining appropriate treatment and disposal methods. Hazardous wastes come from industrial processes and household products and can harm human health or the environment if not properly managed. The preferred methods are reducing waste production, reuse, and recycling. Disadvantaged methods include incineration due to air pollution risks and landfilling due to groundwater contamination risks over time. Proper hazardous waste management is important to protect public health and the environment.

1. Hazardous waste
management
BY
M. SIVA SANKAR
K. SRI ARULMANI
V. TAMIZVENTHAN
G. VIGNESH

2. INTRODUCTION
 Hazardous wastes can take the form of solids, liquids,
sludges, or contained gases,
 They are generated primarily by chemical production,
manufacturing, and other industrial activities.
 They may cause damage during inadequate storage,
transportation, treatment, or disposal operations.

3. USEFUL THING OF HAZARDOUS
WASTE
 Hazardous, or toxic, waste threatens human health or the environment because it is
poisonous, dangerously chemically reactive, corrosive, or flammable. Examples include:
 Industrial solvents.
 Hospital medical waste.
 Car batteries.
 Household pesticide products.
 Dry-cell batteries.
 Ash from incinerators and coal-burning power plants.

4. Household hazardous waste
 Vehicle maintenance items
 Cleaning products
 Cosmetics
 Pet care products
 Garden products
 Home care products

5. What Harmful Chemicals Are in Your
Home?
Cleaning
Disinfectants
Drain, toilet, and
window cleaners
Septic tank cleaners
Paint Products
Paints, stains, varnishes,
and lacquers
Paint thinners, solvents, and
strippers
Wood preservatives
Artist paints and inks
Gardening
Pesticides
Weed killers
Ant and rodent killers
Flea powders
General
Dry-cell batteries
(mercury and
cadmium)
Glues and cements
Automotive
Gasoline
Used motor oil
Antifreeze
Battery acid
Brake and transmission
fluid

6. NEEDS FOR INFORMATIONS
 Needs to identify
 Generators
 Hazardous waste quantities
 Types
 Treatment

7. Hazardous waste generators
 All industries generate some hazardous waste the largest
quantities come from five sectors:
 Chemical and pharmaceutical manufacture
 Metals refining
 Petroleum and coal products
 Metal working and fabrication
 Rubber and plastics manufacture

8. Non-industrial generators:
 Used motor oils
 Used car batteries
 Redundant agricultural pesticides and containers
 Paints and solvents
 Medical and health care wastes

9. Health care wastes
 nursing homes
 dental surgeries
 veterinary practices
 doctors’ surgeries
 hospitals
 clinics

10. Types
 Flammable
 Corrosive
 Reactive
 Toxic

11. Flammable:
Eg; solvents - from chemical manufacturers, laundries & dry cleaners,
metal plating, tanneries, print shops etc
corrosive:
Eg; acids and alkalis - from cleaning & maintenance, equipment repair,
vehicle body shops etc
Reactive:
Eg; bleaches and oxidisers - from chemical manufacturers, laboratories etc
Toxic:
Eg; heavy metals, pesticides, cyanides from metals manufacturing,
photographic processing, pesticide end users etc

12. Some types of waste associated with
different industries
chemical manufacturers:
 Chemical process wastes
 Acids and alkalis
 Spent solvents
 Reactive wastes
 Discarded commercial chemical products
Construction industry
 Paint wastes
 Spent solvents
 Strong acids and bases

13. Vehicle maintenance shops
Paint wastes
Used oils
Spent solvents
Acids and alkalis
Furniture and wood manufacturing and refinishing
Spent solvents
Paint wastes

14. Quantifying waste generation by
measurements
 Factory visits/records
 Interviews with contractors & suppliers
 On - site inspections
 Raw materials and product records
 Waste disposal records at generating, treatment & disposal sites
 Industry associations
 Local government staff/inspectors
 Surveys

15. Waste audit
Pre assessment step
 identify staff and resources
 define unit operations
 identify links between unit operations
Conduct audit
 quantify all inputs and outputs
 analyse and apply findings

16. WASTE REDUCTION
 It based on three type
 Reduce
 Reuse
 recyle

17. STRATEGIES FOR REDUCE
RESOURCES
 Redesign manufacturing processes and products to use
less material and energy.
 Develop products that are easy to repair, reuse,
remanufacture, compost, or recycle.
 Eliminate or reduce unnecessary packaging.
 Charge consumers by amount of waste they throw away
but provide free pickup of recyclable and reusable
items.

18. STRATEGIES FOR REUSE
RESOURCES
 Reuse involves cleaning and using materials over and over
and thus increasing the typical life span of a product.
 Waste reduction decreases the use of matter and energy
resources, cuts pollution and waste, creates local jobs, and
saves money.
 Increasingly substituted throwaway items for reusable
ones, which has resulted in growing masses of solid waste.

19. STRATEGIES FOR RECYCLE
RESOURCES
 Recycling involves reprocessing discarded solid materials
into new, useful products.
 Households and workplaces produce five major types of
materials that we can recycle: paper products, glass,
aluminum, steel, and some plastics.

20. ADVANTAGES AND
DISADVANTAGES OF RECYCLE
ADVANTAGES
 Reduce greenhouse gas emission
 Reduce soild waste
 Can save landfill space
DISADVANTAGE
 Sources separation inconvenient for some
 Reduce profit for land fill and incinerators owners

21. ADVANTAGE AND DISADVANTAGE
OF BURNING WASTE
ADVANTAGES
 Reduce trash volume
 Produces energy
 Sales of energ reduces cost
DISADVANTAGES
 Expensive to build
 Produces a hazardous waste
 Emit some co2 and air pollutants

23. ADVANTAGE AND DISADVANTAGE
OF BURYING SOLID WASTE
ADVANTAGE
 Low operating cost
 Can handle large amounts
of waste
 Filled land can used for
other purposes
DISADVANTAGE
 Noise, traffic and dust
 Release greenhouse gases,
unless they are collected
 Leak and contaminate
ground water

25. Change industrial
processes to reduce
or eliminate
hazardous waste
production
Recycle
and reuse
hazardous
waste
Convert to Less Hazardous
or Nonhazardous Substances
Put in
Perpetual Storage
Natural
decomposition
Incineration
Thermal treatment
Chemical, physical, and biological
treatment
Dilution in air or water
Landfill
Underground
injection wells
Underground salt
formations
Surface impoundments

26. STORE HAZARDOUS WASTE
 Burial on land or long-term storage of hazardous and toxic
wastes should be used only as the last resort.
 Currently, burial on land is the most widely used method
in the United States and in most countries, largely because
it is the least expensive of all methods.
 Wastes can leak into groundwater from the well shaft or
migrate into groundwater in unexpected ways.

28. CONCLUSION
 Avoid using pesticides and other hazardous chemical or
use them in the smallest amounts possible
 Do not dispose of pesticides, paints, solvents, oil,
antifreeze, or other hazardous chemicals by flushing them
down the toilet, pouring them down the drain, burying
them, dumping them down storm drain.
 Instead, use hazardous waste disposal service available in
many cities.