2. INTRODUCTION
OBJECTIVES OF A STP
WHAT IS A STP?
ORIGIN OF SEWAGE
OVERVIEW OF THE STP PLANT
WORKING OF STP
BYPRODUCT
BENEFITS OF STP
IMPACT ON NATURAL ENVIRONMENT
SUGGESTIONS
REFERENCES
3. The first sewage treatment plant was built in
singapore to reduce water pollution. The
sewage treatment plant in chitkara univesity
was built in 2008 in order to reduce pollution
and as it was a huge success, another plant
was also built in 2012.
4. The objective of a sewage treatment plant is to
produce a disposable effluent without causing
harm to the surrounding environment.
Another objective of this sewage treatment
plant is to recycle water n thus SAVE WATER
by purifying the used water again.
Main aim of sewage treatment plant is to reduce
WATER POLLUTION.
5. Sewage treatment is the process of removing
CONTAMINANTS from WASTEWATER and household
SEWAGE, both RUNOFF (EFFLUENTS), domestic,
commercial and institutional. It includes physical,
chemical, and biological processes to remove physical,
chemical and biological contaminants. It produces an
environmentally safe fluid waste stream (or treated
EFFLUENT) and a solid waste (or treated SLUDGE)
suitable for disposal or reuse (usually as farm
FERTILIZER). Using advanced technology it is now
possible to re-use sewage effluent for drinking water.
6. The waste here generally includes liquid from toilets,
baths, showers, kitchens, sinks, gardens and so forth
that is discharged by sewers.
In university the waste is mainly generated by:
Boys/girls hostels
Hostel mess
Canteen
Cafeteria
Blocks of every department
7. STP included following parts which process to give clear
water…
BLOWERS : stp includes two blowers n these
are used to produce vibration.
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12. Liquid from different sources if collected in tank and
sent to blowers through pipelines.
Blowers work with electricity and vibrate the water
inside so that the dirt and heavy particles such as wood
and stones etc. settle down.
This water is then cleared from the top with the help of a
feed pump and sent to clarifier for further process.
In clarifier sludge is removed from the water.
As sludge settles to the bottom of the clarifier, lighter
materials float to the surface and is known as scum.
Slow-moving rakes skim the scum off the surface of the
wastewater. Scum is thickened and pumped to the
digesters along with the sludge.
13. This water is then sent to carbon filter with the help of
high pressure pump.
In this carbon filter chemicals like ferric alum and poly
electrolyte are added which removes harmful bacteria
and microorganisms from the water.
Further water is transferred to sand filter which removes
smell from water and water gets clarified.
This clear water is stored in tanks and sent to different
units through pipelines..!!!
14. Another part of treating wastewater is dealing with
solid waste material. These solid are either kept
for 20-30 days in large, heated and enclosed
tanks called digesters. Here bacteria
breakdown these solids, reducing its volume,
odor and getting rid of organisms that can
cause diseases. The finished product is finally
used as fertilizer or manure as it is rich in
nutrients and can help in growth of plants.
16. Sewage treatment plants can have multiple
effects on nutrient levels in the water that the
treated sewage flows into.
Sludge generated during the clearance process
can prove to be harmful if not disposed or used
properly.
Ferric alum is an example of anaerobic water
treatment which is somewhat harmful to
environment.
17. Another grid should be introduced in the water
treatment plant which should control the level of
nutrients in clear water.
Ferric alum can be replaced with bleaching
powder as it is more organic process for
removal of harmful bacteria.
