Water that has been used and contains domestic, industrial, institutional and commercial waste products is called wastewater.

1. Presented By:-
Abhishek Mahapatra
M.Sc
Subject- Industrial Pollution

2. CONTENT
1. Waste water
2. Ways to treat waste water
3. Physical waste water treatment method
4. Chemical waste water treatment method
5. Waste water treatment
6. Stages of waste water treatment
7. Advantages of waste water treatment
8. Disadvantages of waste water treatment
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3. WASTE WATER AND IT’S SOURCE
 Water that has been used and contains domestic, industrial, institutional and
commercial waste products is called wastewater.
 Residences (kitchen, bathroom)
 Commercial Institution
 Industrial Institution (usually requires specialized treatment process)
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4. WAYS TO TREATE WASTE WATER
 Four common ways to treat wastewater include
 Physical Water Treatment
 Chemical Treatment
 Biological Water Treatment And
 Sludge Treatment.
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5. PHYSICAL WASTE WATER TREATEMENT METHOD
 Major treatment measures falling under this category are as follows:
 Screening
 Mixing
 Flocculation
 Sedimentation
 Floatation
 Vacuum filtration
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6. CHEMICAL WASTE WATER TREATEMENT METHOD
 Major treatment methods falling under this category re as follows
 Chemical neutralization
 Chemical coagulation
 Chemical precipitation
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7. NEED TO TREATE WASTE WATER
 Wastewater treatment is important to remove constituents or contaminants that
could harm people or the environment. Common constituents in domestic
wastewater are:-Organic Solids-Nutrients-Pathogens
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8. STAGES OF WASTE WATER TREATEMENT
 Preliminary Treatment: Solid waste
 Primary Treatment: Sand catcher, Primary sedimentation
 Secondary Treatment: Biodegradable organic matter
 Tertiary Treatment: Removal of disease causing organisms
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9. ADVANTAGES OF WASTE WATER TREATEMENT
 Compact (less than 10m2 of floor space for a complete installation)
 Efficient as a conventional sewer
 Reliable
 Can be installed on difficult and compact sites
 Cost effective (taking into account installation, running costs and
maintenance)
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10. DISADVANTAGES OF WASTE WATER TREATEMENT
 Needs energy to operate (air compressor, turbine)
 Annual maintenance required (which can be binding on some models)
 Can be recommended for holiday homes (secondary houses). SBR systems and
those with a sludge return process can be more suitable for holiday homes,
depending on the occupancy.
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11. CONCLUSION
 Wastewater treatment is a great technique to make optimum use of water.
 Water which would simply be thrown away is put to good use.
 Reduces contamination of clean water sources.
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12. THANK YOU
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