Potential of Sewage Treatment Plants in Bangalore_V C Kumar_2013

POTENTIAL OF STP’S IN

BANGALORE

By

V. C. Kumar

Executive Engineer, BWSSB

A statutory organization set up in 1964under the BWSSB Act whose corefunctions & responsibilities include :

Providing water supply & sewerage andsewage disposal systems

Ensuring sufficient of domestic watersupply to the required standards.

Levying & collecting water/sanitationcharges on a no loss/no profit basis.

Bangalore Water Supply and Sewerage Board

BMRDA

Boundary

1306 Sq. Kms

CDP Boundary

594 Sq. Kms

Core Area

226 Sq. Kms

S.No. Boundaries

Sq.K

m

1 BMA 1306

2 Bruhath Bangalore 810

i) Core Area Sewerage

Catchments 245

ii)7-CMCs & 1-TMC 250

iii) 111 Villages around

Bangalore 315

Bruhath Bangalore Mahanagara Palike

B B M P

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Source of Water Supply

Source of Water Supply

1891-1900 1896- Hesargatta WSS – untreated water

1921-1930 Hesargatta – Combined jewel filters

1931-1940 T G Halli Arkavathi WSS-27 MLD

1951-1960 1952-T G Halli – 45 MLD added

1961-1970 1964 – T G Halli – 135 MLD

1971-1980 1974 – CWSS I Stage – 135 MLD

1981-1990 1882- CWSS Stage II – 135 MLD

1991-2000 1993- CWSS Stage III – 270 MLD

2001-2010

2011-2020

2002 – CWSS Stage IV phase I -270 MLD

Proposed CWSS Stage IV Phase II – 500

MLD

Bangalore Water Supply

ProjectsYear of

commissioning

Installed

Capacity

(MLD)

Present

Supply

(MLD)

Arkavathy (TG Halli) 1933 149 0

Cauvery Stage I 1974 135 135

Cauvery Stage II 1983 135 135

Cauvery Stage III 1993 270 270

Cauvery Stage IV, Phase – I 2002 270 300

Cauvery Stage IV, Phase – II 2012 500 300

Total Supply 1459 1140

Present Water Supply

Year Quantity in MLD

2006 875

2011 985

2021 1320

2036 1570

Generation of wastewater

Wastewater

BANGALORE SANITATION

Bangalore is blessed with undulated terrain having natural gradient

Wastewater generated flows out of the city in all the four directions

Wastewater generated is collected and conveyed through the sewerage network to the treatment plants for treatment up to Secondary level and disposed to the natural course

BWSSB has setup 14 treatment plants of secondary and Tertiary level of various capacities all-round the city – 721 MLD Capacity

Four Tertiary treatment plants of total capacity 73 MLD has been established and treated water is reused for non potable purposes

ABOUT BANGALORE SANITARY SYSTEM

1920-1950 Sewerage system existed

1950-1960 Major sewerage system constructed

1970-1980 K & C Valley wastewater treatment

plant (Primary) & V- Valley STP

1980-2000 K & C and V Valley and Hebbal

upgraded to secondary

2000-2010 CWSS Stage IV Phase I – 7 treatment

plants & sewerage system

2012 - 2015 CWSS Stage IV Phase II – 11

treatment plants – 339 MLD capacity

Core Area Sewerage Net work

Major Valleys

1 – K & C Valley

2 – V Valley

3 – Hebbal Valley

#

#

#

%

%

%

%

%

Hebbal Valley

ArkavathiValley

VrishbhavathiValley

ChallaghattaValley

KoramangalaValley

TavarakereValley

KatriguppeValley

HebbalMinor Valley-1

HebbalMinor Valley-2

AgaramSPS

V-ValleySTP

MadivalaMini-STP

K&C ValleySTPKempambudhi

Mini-STP

HebbalValley STP

(38)

(36)

(35)

Area in Sq.Km.(32)

(31)

(19)(16)

(6)

(11)(5)

K-MinorValley

To MailasandraSTP

To Raja CanalSTP

BellandurLake

$

Major and Minor Valleys Area in Sq

Kms

Hebbal 48

Challaghatta 36

Koramangala 37

Taverekere 19

Kathariguppe 16

Vrishabhavathi 38

Arkavathi 35

Total 229

•150 mm dia – 1490 Kms

•175 mm dia – 450 Kms

•225 mm dia – 1600 Kms

•300 mm dia – 275 Kms

•Total No. of Manholes –1,28,000

Abstract of sewer statistics < 400mm

Core Area

ABSTRACT OF SEWER STATISTICS

>400MM

CORE AREA

Zones Total Length

in Km

Existing

inside SWD

in Km

No of

manholes in

Nos

Hebbal 45 9 1650

K&C 113 35 2857

V Valley 85 18 1746

Total 243 62 6253

Wastewater Treatment Plants Sl.

No.Location

Capacity in

MLDTreatment Facility

Under CWSS I, II, III stages

1. Vrishabhavathi Valley 180 Secondary – Trickling filters

2. K & C Valley I 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 MLDTreatment Facility

7. Mylasandra 75 Secondary – Extended aeration

8. Nagasandra 20 Secondary -Extended aeration

9. Jakkur 10 Secondary – UASB +Extended aeration

10. K. R. Puram 20 Secondary – UASB +Extended aeration

11. Kadabeesanahalli 50 Secondary-Extended aeration

12. Rajacanal 40 Secondary- Extended aeration

13. Cubbon Park 1.5 Membrane

14. Lalbagh 1.5Extended Aeration + Plate Settlers + UV

disinfection

Grand Total 721

Treatment plants proposed under CWSS Stage IV Phase II

Name Capacity in MLD Process (Including BNR)

Raja Canal 40 Extended Aeration (EA)

Horamavu Agara 20 Sequential Batch Reactor (SBR)

Nagasandra 20 SBR

Chikkabanavara 5 SBR

Kadugodi 6 SBR

Kachohalli 3 Membrane Bio – Reactor

Kengeri 60 Activated Sludge Process (ASP)

K & C Valley 60 ASP

Bellandur Amanikere 90 ASP

Doddabele 20 SBR

Yellemallappa Chetty Kere 15 SBR

Total 339

Wastewater Treatment Plants

Raw sewage characteristics

Raw sewage BOD : Average 300 mg/lit

Raw sewage suspended solids: Average 400-500 mg/lit

Treated effluent standards ( Secondary)

Treated effluent BOD : < 20 mg/lit

Treated effluent suspended solids : < 30 mg/lit

Tertiary standardsTreated effluent BOD : < 5 mg/lit

Treated effluent suspended solids : < 5 mg/lit

Coliforms : < 2.2/100ml

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

K & C Valley STP (Activated Sludge Process)

Capacity 163 MLD

Capital cost 602 Lakhs

Installed capacity of power 1475 KVA

Power Charges 50 Lakhs per year

Cost of Man power utilised 25 Lakhs per year

Total O & M charges 75.60 lakhs per year

K & C Valley STP

Capacity 55 MLD additional module


K & C Valley STP (Extended Aeration Process)

Capacity 30 MLD

Capital cost 2700

Lakhs


K & C Valley Sewage Treatment Plant

Koramangala And Challaghatta

Valley Treatment Plant – 30 MLD

Plant

Agaram Pump House

K & C Valley treatment plant

Koramangala And Challaghatta Valley

Treatment Plant – 30 MLD Plant

Aeration Tank

Madiwala Water Reclamation Plant

Name of the STP : Madiwala STP

Location : Madiwala

Capacity : 4 MLD capacity

Treatment Process : First & Secondary

Year of Construction : 1998

Capital cost : 121 Lakhs

Catchment Area : Tavarekere

Effluent characteristics : BOD < 20m g/L & SS <30 mg/L

Installed Capacity of power : 35 KVA

Power Charges : 3.7 Lakhs per year

Cost of Man power utilised : 10.0 Lakhs per year

Total O & M charges : 13.7 lakhs per year

Madivala Water Reclamation Plant

UASB side view

Madivala Water Reclamation Plant

UASB with sludge withdrawal piping arrangement

V. Valley STP (Trickling Filter)

Capacity 180 MLD

Capital cost 1122

Lakhs

Installed Capacity of power 1400 KVA



Total O & M charges 105 lakhs per year

V. Valley Sewage treatment Plant

V. Valley Tertiary Treatment plant ( Trickling filter followed by

Densadeg and Flopac & disinfectin by Chlorination)

Capacity 60 MLD




Chemical Charges if any 36 Lakhs per year


V. Valley Sewage treatment Plant - Recycling Plant

Effluent Standards

- BOD < 5 mg/ L

- SS < 5 mg/ L

- Turbidity < 2 NTU

V. Valley Sewage treatment Plant - Recycling Plant

Capacity 01 MLD



Power Charges 5.0 Lakhs per year

Total O & M charges 5.6 lakhs per year

(including man power)

Kempambudhi Water

Reclamation Plant (Activated

Sludge Process)

Hebbal Sewage

Treatment Plant (Activated Sludge

Process)

Capacity 60 MLD






YELAHANKA Tertiary

Treatment plant

(Conventional ASP followed

with filtration by

Chlorination)Capacity 10 MLD





Chemical Charges if any 36 Lakhs per year


Supplied to International Airport, BEL,

Wheel and Axle and other industries

Effluent Standards

- BOD < 5 mg/ L

- SS < 5 mg/ L

- Turbidity < 2 NTU

Capacity 1 MLD



Power Charges 5.0 Lakhs / Year

Total O & M charges 5.6 lakhs / Year

(including man power)

Kempambudhi Water Reclamation

(Activated Sludge Process)

Capacity 75 MLD

Capital cost : 5200 Lakhs

MAILASANDRA STP

(Extended Aeration Process)

Capacity 50 MLD

Kadabeesanahalli STP


NAGASANDRA STP


Capacity 20 MLD

Capital cost Rs.1400 Lakhs

Jakkur

(UASB Process)

Capacity 10 MLD

K R Purum

(UASB Process)

Capacity 20 MLD

Rajacanal


Capacity 40 MLD

Cubbon Park

(Membrane Process)

Capacity 1.50 MLD

Lalbagh Park


Capacity 1.50 MLD

Tertiary Treated Water Utilizations

Sl. No. Consumer Wastewater

in KLD

1. International Airport 1000

2 BEL 1200

3. Wheel and Axle Plant – Railway 300

4. ITC Limited 300

5. IAF 200

6. Aravind Mills 1000

7. Cubbon Park 1500

8. Lalbagh 1500

TOTAL 7000

Selling rate - Rs.25/- per KL

Revenue - 4.50 Crores per year

Cubbon Park

Tertiary

Treatment Plant

RAW SEWAGE AND TREATED WATER

CHARACTERISTICS

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 wastewaterRaw Sewage

Quality of treated wastewater

Potential of Sewage Treatment Plants in Bangalore_V C Kumar_2013

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