Download - Waste Water Treatment Process
WASTEWATER TREATMENT PROCESS AND THE
IMPORTANCE
NOR UBAIDIHA BINTI MOHD HASAN12410CIVIL ENGINEERING
Will you dare to use it without treatment??
OBJECTIVES
• To give information and elaboration on how the wastewater treatment process.
• To expose about the importance of wastewater treatment process
WASTEWATER??Figure 2 : Sample of sewerage
• “Used” water deposited into drains by domestic (residents and businesses )
• Down the sink or toilet and travels through underground pipes (sanitary sewer system)
• A mixture of domestic
sewage
WASTEWATER TREATMENT FLOW DIAGRAM Collection
Preliminary treatment
Primary treatment
Secondary treatment
Tertiary treatment / Disinfection
Clean water discharged to the water stream
1. CollectionFigure 1 : Sample of domestic sewerage
• Sewer system is completely gravity powered
• Sewer mains flow into progressively larger pipes until they reach the wastewater treatment plant.
2. Preliminary treatmentFigure 3 : Bar screen used in preliminary
treatment
• Bar screen to remove large solid objects (sticks and rags)
• Grit tank to allow sand, gravel, other material that not to be caught by the bar screen to settle to the bottom.
• Debris is disposed of at a sanitary landfill or recycled.
3. Primary treatmentFigure 4 : primary settling tank
Figure 5 : primary sedimentation tank
primary settling tank and primary sedimentation tank :
• physical separation of solids and greases
• solid particles of organic material are removed
4. Secondary treatmentFigure 6 : Aeration tank • Biological treatment
process
• Removes dissolved organic material and suspended organic solids
• In aeration tank
5. Tertier treatment / DisinfectionFigure 7 : UV Radiation Instrument
• Chlorine and ultraviolet disinfection are the most widely used
• Disinfection using chlorine to reduce pathogens.
• Exposing contaminated water to radiation from UV light
6. Discharged • Treated water discharged
• To the water stream
• Safe for rivers
• Safe for aquatic organisms
IMPORTANCE OF WASTEWATER TREATMENT PROCESS
Eliminating the discharge of pollutants
Obtaining water quality
removes physical, chemical and biological contaminants
CONCLUSION• Wastewater treatment process
i. Collectionii. Preliminary treatmentiii. Primary treatmentiv. Secondary treatmentv. Tertiary treatment /
Disinfectionvi. Clean water discharged to the
water stream
• The importance of wastewater treatment process
Eliminating the discharge of pollutants
Obtaining water quality removes physical, chemical
and biological contaminants
– Wastewater Engineering Treatment and ReuseMetcalf & Eddy, Fourth Edition, Mc Graw Hill
– http://www.ordainternational.org/pages/water.html– http://
www.ci.gillette.wy.us/util/StonepileSelectCompost.pdf
– http://www.regulatorystaff.sc.gov/– http://ezinearticles.com/?Importance-of-Wastewater
-Treatment&id=734605
THE ENDQ & A SESSION