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Overview
 Plant Capacity : 1000 M3 / Day
Process Involved : Activated Sludge Process
Type : Extended Aeration System
Steps Involved in Treatment Process
i) Bar Screen: To remove floating objects
which are harmful to the pumps & other machineries
ii) Grit chamber cum oil & grease trap: To remove grit floating matter oil &
grease which gets coated its carrying capacity &also it prevents transfer of
oxygen in the STP. Detention time is 15 minutes.
iii) Pump House : 2 nos. of Raw effluent pumps (each of capacity 44 M3 /hr @
10m head) 2 nos. return storage pumps (each of capacity 44 M3 /hr @ 10m
head)
iv) Aeration tanks: Biological process takes place in aeration tank which
are used to convert the finely divided and dissolved organic matter in
wastewater into flocculant settleable solids.
The biological process selected to remove
organic matter is called Activated Sludge Process. The aeration tank is
equipped with aerators to transfer atmospheric oxygen to sewage. The sewage
is aerated in the aeration tanks with the help of surface aerators round the
clock to build up necessary biological system.
v) Secondary Clarifier: To achieve remove of
biological solid and its return to aeration tank the settled sludge will be
collected in a hopper of the clarifier and pumped back to aeration tank with
the help of return sludge pumps. When the concentration of solids in the
aeration tank exceeds 4000 mg/lit, part of this sludge is sent to sludge
drying beds for dewatering.
vi) Treated sewage chlorination: The clear
overflow form the clarifier is collected in a sump and either used for
gardening or disposed off in the strom drain after proper chlorination which
disinfects treated sewage
vii) Sludge Drying Beds : For dewatering the
excess sludge, sludge-drying beds are provided. While water passes through'
it, which is collected through drains and taken back to aeration tank.
viii) Effluent Disposable Pumps: Treated
sewage after chlorination shall be pumped for gardening in Hospital Complex
.covering 6 acres and in J. N. Medical College covering 15 acres.
Untreated
& Treated Hospital Waste Water Characteristics
|
Sr. No. |
Parameter |
Untreated Sewage Characteristics |
Treated Sewage Characteristics |
On Land Irrigation Limits given by
KSPCB |
|
1 |
Color & Odour |
Brown & Objectionable |
Colorless & Odorless |
Colorless & Odorless |
|
2 |
Suspended Solids |
370 mg/lit |
130 mg/lit |
200 mg/lit |
|
3 |
Conductivity |
2500-3000 |
596 |
2250 |
|
4 |
pH |
8-10 |
7.15 |
6-8.5 |
|
5 |
Oil & Grease |
50 mg/lit |
9.00 mg/lit |
10.00 mg/lit |
|
6 |
BOD @ 27o C |
250 mg/lit |
64.0 mg/lit |
100 mg/lit |
|
7 |
Boron |
2.1 mg/lit |
1.12 mg/lit |
2.00 mg/lit |
|
8 |
Sodium Absorption Ratio |
4.51 |
1.38 |
18.00 |
|
9 |
Chloride |
337 mg/lit |
96.0 mg/lit |
350.0 mg/lit |
|
10 |
Sulphate |
67.0 mg/lit |
62.0 mg/lit |
1000 mg/lit |
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