TOPIC - SEWAGE TREATMENT METHODS FOR WATER.pdf

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1. GOVERNMENT POST GRADUATE COLLEGE
NOIDA
MICROBIOLOGY ASSIGNMENT :
SEWAGE TREATMENT
Submitted to :
Dr. KAVITA SINGH CHAUDHARY
Head Of Department Microbiology
Govt. P.G. College Noida
Submitted by :
CHANDAN
B.SC. 2
nd
SEMSTER
Session – 2023-24

2. SEWAGE TREATMENT

4. SEWAGE WATER

5. sewage
➢Sewage is waste water from community, containing
solid & liquid excreta, derived from house, street &
yard washing, factories & industries.
➢Waste water which does not contain human excreta.
Sullage

6. ➢Amount of sewage that flows in sewers depends
upon
•Habbits of the people
•Time of the day
➢The average amount of sewage which flows through
thw sewerage system in 24 hours is called the “dry
weather flow”

16. Primary Treatment

33. Method of sludge disposal

35. 2. Sea disposal
Sea coast town and cities can dispose of sludge by
pumping it into the sea

36. 3. Land
Sludge can be disposed of by composting
with town refuse.

37. Tertiary Treatment

38. •Tertiary treatment is the third stage of wastewater treatment, following
primary and secondary treatment. Its purpose is to further improve the
quality of treated wastewater before it is discharged into the environment
or reused.
1. Why is tertiary treatment needed
•To remove total suspended solids (TSS) and organic matter present in
effluents after secondary treatment.
•To remove specific organic and inorganic constituents from industrial
effluents, making them suitable for reuse.
•To prepare treated wastewater for land application or or direct discharge
into water bodies (rivers, lakes, etc).
•TO remove residual nutrients beyond what earlier treatment methods
achieve.
•To eliminate pathogens from secondary treated effluents.
•To reduce total dissolved solids (TDS) to meet reuse quality standerds.

39. TERTIARY TREATMENT

40. 2. Unit Operation/Processes Used in Tertiary Treatment
•Nutrient Removal
•Removal of ammonia and phosphorus
•Processes include nitrification/denitrification, ion exchange, and membrane
processes.
•Phosphorus Removal
•Physical methods ( filtration, membrane technologies ) and chemical
precipitation.
•Ammonia Removal
•Common processes: air stripping (convert ammonium to gaseous phase) and
biological nitrification/denitrification.

41. •Biological Nitrification and Denitrification:
•Conversion of ammonia to nitrate (Nitrosomonas) and nitrte to nitrate
(Nitrobactor).
•Ion Exchange:
•Used for demineralixation by swapping ions.
•Membrane Processes:
•Includes microfiltration (MF), ultrafiltration (UF), nanofiltration (NF), and
reverse osmosis (RO).

42. 3. Advantages of Membrane Processes:
•Separations occurs at ambient temperature without phase change
•No accumulation of product inside the membrane (unlike ion exchange resins).
Remember, tertiary treatment plays a crucial role in ensuring cleaner water for our
environment and communities!.....

43. THANK YOU