GOVERNMENT OF ANDHRA PRADESH PUBLIC HEALTH AND MUNICIPAL

ENGINEERING DEPARTMENT

WELCOME

Liquid Waste Management System

in Bengaluru

Overview of Bengaluru CityThe population of Bengaluru City as per 2011 Census is 84.43 Lakhs and the present population is around 100 Lakhs.

Bengaluru Metropolitan area is spread over an extent of 710 Sqkms.

•The BWS&SB is responsible for water supply, sewerage system and waste water disposal system in Bengaluru metropolitan area.

• The total installed capacity of Water Supply facility in Bengaluru City is around 1459 MLD.

•BWS&SB has been supplying 1140 ml of water daily @ 126 lpcd in core Bengaluru City.

Water Supply status in Bengaluru City

Present Water Supply Installations in Bengaluru City

S.No ProjectsYear of

Commissioning

Installed

Capacity in MLD

Present

Supply in MLD

1Arkavathy (TG

Halli)1933 149 0

2 Cauvery stage I 1974 135 135

3 Cauvery stage II 1983 135 135

4 Cauvery stage III 1993 270 270

5Cauvery stage IV

Phase-I2002 270 300

6Cauvery stage-IV

Phase-II2012 500 300

TOTAL SUPPLY 1459 1140

•Total quantity of Sewage generated is 985 MLD.

•There are 14 No’s decentralized STP’s in Bengaluru city with a total capacity of 721 MLD.

•Another 11 No’s STP’s with a total capacity of 339 MLD are under construction / Tender Stage.

• All the STP’s are with Activated Sludge Process except one STP at Cubbon Park of 1.50 MLD with MBR Technology

•The BWS&SB is planning to treat and dispose the total quantity of waste water generated by 2016

Waste water Generation and Disposal

The details of the existing Sewerage Treatment plants in Bengaluru City

S.No Location Capacity

in MLD

Treatment Facility

1 Vrishabhavathi Valley 180 Secondary-Tricking

Filters

2 K.C Valley 248 Secondary-Activat

ed sludge Process

3 Hebbal Valley 60 Secondary-

Activated sludge

Process

4 Madivala 4 Secondary:UASB-

Oxidation ponds+

constructed wet lands

5 Kempambudhi 1 Secondary:

Extended Aeration

The details of the existing Sewerage Treatment plants in Bengaluru City

S.No Location Capacity

in MLD

Treatment Facility

6 Yelahanka 10 Activated sludge

Process +Filtration+

Chlorination(Tertiary)

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

The details of the existing Sewerage Treatment plants in Bengaluru City

S.No Location Capacity

in MLD

Treatment Facility

11 Kadabeesanahalli 50 Secondary +

Extended Aeration

12 Rajacanal 40 -do-

13 Cubbon park 1.5 Membrane (MBR)

14 Lalbagh 1.5 Extended

Aeration + Plate settlers

+ UV Disinfection

Total 721

The details of the Proposed Sewerage Treatment plants in Bengaluru City S.N

o

Location Capacity

in MLD

Treatment

Facility

Remarks

1 K&C Valley 60 Advanced

Extended Aeration

with power generation

facility of 1MW per

day.

Under

Construction

2 Raja Canal 40 Activated

Sludge Process.

Under

Construction

3 Horamavu Agara 20 Sequential

Batch Reactor

Tender

Stage

4 Chikkabanavara 5 SBR Tender

Stage

5 Nagasandra 20 SBR Tender

Stage

The details of the Proposed Sewerage Treatment plants in Bengaluru City S.No Location Capacity

in MLD

Treatment

Facility

Remarks

6 Kadugodi 6 SBR Tender

Stage

7 Kachohalli 3 Membrane

Bio-Reactor

Tender

Stage

8 Kengeri 60 ASP Tender

Stage

9 Bellandur

Amanikere

90 ASP Tender

Stage

10 Doddabele 20 SBR Tender

Stage

11 Yellamalla Chetty

Kere

15 SBR Tender

Stage

Total 339

Waste water Treatment facilities visited by the team

I)10 MLD Tertiary waste water treatment plant at Yelahanka

II)40 MLD Sewerage Treatment Plant at RAJA CANAL

III)1.5 MLD STP at Cubban Park

IV)248 MLD STP at K.C Valley

V)60 MLD STP at K.C Valley under Construction with ASP having facility for power generation

10 MLD TREATMENT PLANT AT YELAHANKA

Parameter Wastewater Treated water

BOD 380mg/lt <5mg/lt

COD 720mg/lt <50mg/lt

Suspended solids 450mg/lt <5mg/lt

Turbidity 289NTU <2NTU

pH 6.8 to 7.5 7 to 8

Fecal coliform 620MPN <25MPN

Coliform Index 1200MPN/100m

l

2.2 to 23MPN

Characteristics of Waste and Treated water at Yelahanka Treatment Plant

40 MLD Sewerage Treatment Plant at RAJA CANAL

40 MLD Sewerage Treatment Plant at RAJA CANAL

Parameter Wastewater Treated water

BOD 259-343mg/lt <20mg/l

COD 505-770mg/lt <50mg/l

Total Suspended

solids

300-600mg/lt <30mg/l

pH 6.8 to 8.1 5.5 to 9

Chlorides 82-140 mg/l <1 mg/l

Sulphates 21-42 mg/l -

Characteristics of Waste and Treated water at Raja Canal Treatment Plant

1.5 MLD Sewerage Treatment Plant at Cubban Park

Samples of waste water before & after treatment

Parameter Wastewater Treated water

BOD 330mg/lt <2mg/l

Turbidity - 0.05 NTU

Total Suspended

solids

450 mg/lt <1mg/l

pH 6.8 to 8.0 7.2

Fecal Coliform Nil Below Detection

Limit

Coliform Index 109 - 1010 Below Detection

Limit

Characteristics of Waste and Treated water at Cubban Park Treatment Plant

30 MLD STP with Surface Aerators at K.C Valley

55 MLD STP at K.C Valley with Diffused Aeration System

Flow Diagram of 30 MLD Sewerage Treatment Plant at K.C Valley

108 MLD Sewerage Treatment Plant at K.C Valley

Parameter Wastewater Treated water

BOD 350mg/lt <20mg/l

Total Suspended

solids

650 mg/lt <30mg/l

pH 7.0 to 8.51 5.5 to 9.0

COD 300 to 1000

mg/l

< 250 mg/l

Characteristics of Waste and Treated water at K.C Valley Treatment Plant

Recycling ProposalsBangalore is situated about 840 to 940 mtrs., above sea level• Unlike many other cities Bangalore is not blessed with a near by perennial river.• With the rapid urbanisation many of the lakes located in and around the city have been destroyed.• The lakes which were acting as source of ground water recharge have gone resulting in rapid fall of ground water resources.• Production cost of water is very high and approximately Rs.16 to 18 per Kilo litre.• Water tariff for Industrial and other commercial users is Rs.66 per Kilo Litre.

Recycling Proposals• The dependency on Arkavathy the oldest surface resource has depleted over a period of time.• The city has to depend entirely on Cauvery Source for all of its fresh water needs.• Water is being supplied on alternate days to overcome the demand against the existing supplies.• The wastewater generated in the city is going as an waste, which needs to be considered as one of the water resources for meeting the demand for nonpotable users.• In order to reduce the burden on fresh water resources for drinking purposes, BWSSB has initiated action in setting up recycling plants of 60 and 10 MLD capacity at V. Valley and Yelahanka respectively

Teritiary treatment is being carried out at Vrishabavathi and Yelahanka plants having capacity 60 MLD and 10 MLD respectively.

The recycled water from Yelahanka plant is being sold to Bangalore International Airport, Bharath Electronic Limited, Indian Tobacco Company, Rail Wheel Factory and Indian Air Force @ Rs. 25/KL and the revenue generated is around 2.75 Crores.

The O&M Cost per ML for the ASP is Rs. 0.70 Lakhs per month inclusive of electrical charges. Whereas the O&M cost per ML in case of MBR is Rs. 2.66 Lakhs per month.

Present Recycling Facilities

All the treatment plants are operated with Automation

The treated effluent from all the existing STP’s are meeting the standards

The Maintenance of STP’s was entrusted to the International companies like SUEZ, VATECH WABAG Ltd, Degremont Ltd etc which are maintaining the effluent quality very well.

Operation & Maintenance

The Stone ware pipes are used for Street Sewers

RCC NP3 pipes are used for Trunk sewers

CI/DI pipes are used for Pumping Mains.

Pipe Material Used for Waste Water Disposal

Storm Water Drains

The BBMP is responsible for the construction and maintenance of Storm water drains.

The total length of storm water drains in BBMP area is 840 Kms. Out of which 240 Kms are in the core area and 600 kms in peripheral area.

The total length of primary drains is 415 Kms and secondary drains is 425 Kms. All the primary and secondary drains are open drains and these drains are covered where ever habitations are there.

Liquid Waste Management System

in Goa

•The Goa state is divided into North Goa with Panaji as capital and South Goa with Margoa as capital.

•The present population of Goa state is 15,50,000•The Urban population of Goa state is 7,75,000•The Population of Margoa and Panaji cities is 5,50,000.

•The Public Works Department is responsible for Water Supply in Goa State.

•The Sewage and Infrastructural Development Corporation of Goa limited was formed to develop sewerage facilities in the state of Goa.

Overview of Goa state

Present Water Supply in Panaji & Margoa

Installed capacity of Water Supply is 80 MLD

The Percapita supply is @ 145 LPCD

The Raw water source for water supply for these cities are from rivers Mandovi, Sal and Paroda.

•The capacity of the existing waste water treatment plants is 35.50 MLD

•Construction of ongoing waste water treatment plants is 41.50 MLD

•The treatment process being used in most of the STP’s is CYCLIC ACTIVATED SLUDGE TREATMENT process (C-Tech-SBR).

Waste water Collection & Disposal

•Phytorid technology is being used for residential and commercial complexes at Ponda.

•The capacity of plant with Phytorid technology is 0.50 MLD and it does not require energy as well as chemicals as it is a natural treatment process certified by NEERI, Nagpur.

Waste water Collection & Disposal

The details of the existing Sewerage Treatment plants in Goa

S.N

o

Name of the Sewerage

Plant

Total

MLD

Areas

covered

1 Tonca 12.50 Part of Panaji,

Taleigau, Mirama

2 Bambolin 1.00 Goa Medical

College

3 Panaji KTC Busstand 0.5 Panaji Bus

stand

4 Margoa 7.50 Part of

Margoa

5 Vasco 14.00 Vasco City

The details of the proposed Sewerage Treatment plants in Goa

S.No Name of the

Sewerage Plant

Total MLD Area

Covered

1 Margoa 6.50 (C.Tech)

20.00

(C.Tech)

Balance area

of Margoa

2 Tonca (Panaji) 15.00

(C.Tech)

Balance area

of Panaji,

Taleigau, Miramar

The Waste Water Treatment Facilities visited by the team

I)Sewerage Treatment Plant at Margoa

II)Sewerage Treatment Plant at Tonca (Panaji)

III)Sewerage Treatment plant at Ponda with PHYTORID Technology

Sewage Treatment Plant at Tonca

Disinfection in Sewerage Treatment Plant at Tonca

Sewage Treatment Plant with Phytorid Technology at Ponda

Treated Effluent from Phytorid

Pollutant Performance (% Removal)

Total Suspended Solids 75-95BOD 70-80COD 60-75Total Nitrogen Phosphates 50-60Fecal Coloiform 85-95

Performance of PHYTORID Technology

The team observed that the effluent doesn’t have colour but little odour.

Under Construction Sewage Treatment Plant at Margoa

The liquid waste management system adopted in Goa state is with SBR supported by C.Tech Technology.

All the treatment plants are operated with Automation

The treated effluent from all the existing STP’s are meeting the standards

The Maintenance of STP’s is being carried out by SIDCL & SFC which are maintaining the effluent quality very well.

Operation & Maintenance

HDPE pipes are being used for gravity and pumping mains upto 600 mm dia and above 600 mm dia MS/ CI pipes are being used.

Pipe bursting technology is being used for rehabilitation of old pipe lines.

Trench less technology is being used for laying of new sewers in busy traffic areas.

Pipe Material used & Technology for laying sewer network

Storm Water Drains

Storm water drainage system is existing in North Goa where the land profile is plain.

In South Goa where the terrain is undulated the storm water drains are not provided.

All the existing storm water drains are open drains.

All the drains are covered in core area of Panaji City.