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