Wastewater Treatmentmohua.gov.in/upload/uploadfiles/files/WW_Recycling... · 2018-01-10 · Water...
Transcript of Wastewater Treatmentmohua.gov.in/upload/uploadfiles/files/WW_Recycling... · 2018-01-10 · Water...
Wastewater Treatment by
V. C. Kumar, Executive Engineer
Demand and Supply
Year Population Demand in MLD
Supply in MLD
Shortage in MLD
2001 53.79 870 540 330
2010 75.00 1125 900 225
2015 88.00 1500 1470 30
2021 100.00 1800 1470 330
2036 125.00 2500 1470 1030
Wastewater Generation
There are three major valleys in Bangalore
Name of the Valley Area in Sq. Kms Flow in the
valley in MLD
Vrishabhavathi 89.08 500
Koramangala and
Challaghatta
97.91 400
Hebbal 53.45 100
Locations of existing STP`s
Yelahanka TTP
Jakkur STP
Hebbal STP
KR Puram STP
Kadabeesanahalli STP
K & C Valley STP
Madiwala STP
Kempambudhi STP
Mylasandra STP
V Valley STP & TTP
Nagasandra STP
Rajacanal STP
Wastewater Treatment Plants
Sl. No.
LocationCapacity in
MLDTreatment Facility
1. Vrishabhavathi Valley 180 Secondary – Trickling filters
2. K & C Valley 248Secondary: Activated sludge process
3. Hebbal Valley 60Secondary: Activated sludge process
4. Madivala 04Secondary: UASB + oxidation ponds+ constructed wetlands
5. Kempambudhi 01 Secondary: extended Aeration
6. Yelahanka 10Activated sludge process + filtration+ chlorination (Tertiary)
Wastewater Treatment Plants
Sl. No.
LocationCapacity in MLD
Treatment Facility
7. Mylasandra 75 Secondary – Extended aeration
8. Nagasandra 20Secondary -Extended aeration
9. Jakkur 10 Secondary – UASB +Extended aeration
10. K. R. Puram 20 Secondary – UASB +Extended aeration
11. Kadabeesanahalli 50Secondary-Extended aeration
12. Rajacanal 40Secondary- Extended aeration
13. Cubbon Park 1.5 Membrane
14. Lalbagh 1.5
Extended Aeration + Plate Settlers + UV disinfection
Grand Total 721
Bangalore Water Supply and Sewerage Board
has established 4 Tertiary treatment plants for
the recycle and reuse of wastewater.
1) V. Valley – 60 MLD capacity
2) Yelahanka – 10 MLD Capacity
3) Cubbon Park – 1.50 MLD Capacity
4) Lal Bagh – 1.50 MLD Capacity
Recycle and Reuse
V Valley Tertiary Treatment plant
V. Valley Tertiary Treatment plant ( Trickling filter followed by Densadeg and Flopac & disinfection by Chlorination)
Capacity 60 MLD
Parameter Treated
Design Actual
pH 7.1
S S in mg/ L < 5.00 3.40
BOD in mg/ L < 5.00 3.00
COD in mg/ L 16.60
Wastewater characteristics at V Valley TTP
V Valley Tertiary Treatment plant
V Valley Tertiary Treatment plant
Chlorination Tank
Biggest in India
Proposed to supply treated water to Bidadi Power Plant
Water is supplied to Arvind Mills and other industries for non – potable uses
Production cost – Rs.10 to 12 per KL Water is charged at Rs.15 per KL if it is supplied at the plant site Rs. 25 per KL if it is supplied through pipeline Conserves water
V Valley Tertiary Treatment plant
Conventional ASP followed with filtration by Chlorination
Capacity 10 MLD
Yelahanka Tertiary Treatment Plant
Aeration Tank
Parameter Raw Treated
Design Actual Design Actual
pH 5.5 - 9 6.50 7 - 8 7.70
S S in mg/ L 480.00 397.00 < 5.00 3.50
BOD in mg/ L 380.00 344.00 < 5.00 3.97
COD in mg/ L 836.00 1097.0 < 250 53.00
Wastewater characteristics at Yelahanka TTP
Yelahanka Tertiary Treatment plant
Supplied to International Airport, BEL,
Rail Wheel Factory, ITC, IAF and other industries
Revenue of about Rs.18.00 Lakhs is generated per month.
Cubbon Park
(Membrane Process)
Cubbon Park
Parameter Unit Influent Effluent Actual
pH - 6.8 – 8.0 6.5 – 8.0 7.2
BOD Mg/L 330 <4 <2
TSS Mg/L 450 <3 <1
Turbidity NTU - <2 0.05
Fecal Coliform
MPN/100 mL
nil BDL BDL
Coliform Index
MPN/100 mL
109 – 1010 2.3 BDL
Treated water is supplied to Land Scape irrigation of Cubbon Park. Revenue from the supply is Rs.6,75,000/- per Month
Lalbagh Park (Extended Aeration Process)
Treated water is supplied to Land Scape irrigation of Lal Bagh. Revenue from the supply is Rs.6,75,000/- per Month
Treated wastewaterRaw Sewage
Quality of treated wastewater
Rain Water Harvesting
RWH is made mandatory
About 1010 plumbers have been trained
33 workshops were conducted
Help desk created
Road shows and Beedi nataka were arranged
RWH adopted in Board offices
RWH adopted in important Government Offices
RWH adopted in Old buildings
Theme park will be inaugurated in March
Initiatives
Treated water is being supplied for non
potable uses
SCADA operated Tertiary Treatment Plants
Proposal has been made for On line
Monitoring
All the seven STP’s are going to be upgraded
to Tertiary level
Proposal for Indirect potable usage has been
made
Package STP locations Proposed Initial
Capacity
(MLD)
Recommended
Treatment
Process
Estimated
cost in Rs.
Million
S1a
Raja Canal 40 EA 448
Horamavu Agara 20 SBR 224
Kachohalli 3 MBRs 34
Kadugodi 6 SBRs 67
Nagasandra 20 SBR 422
Chikkabanvara 5 SBR
S1b Kengeri 60 AS without PG 792
S1cK & C Valley 60 AS with PG 1558
S1d Bellandur
Amanikere90 AS without PG 1110
S1e
Doddabele 20 SBR 224
Yelemallappa
Chetty15 SBR 204
Total 339 5083