Sewage Treatment Plant (STP), Bharwara Co-treatment of Faecal Sludge

Figure 1: Arial view of Bharwara STP& co-treatment

Scale of service

City level

Area of installation (Hectare)

120

Year of Installation

2011

Capital cost (INR)

360 Crore

Location

Bharwara

Operational & Maintenance cost per year (INR)

35 Lakhs

Funding Agency

JNNURM

Design Capacity

345 MLD

Implementing Agency

UP Jal Nigam

Sources of faecal sludge

Pits and Septic tanks

 
 
 
Lucknow, the capital city of the Indian state of Uttar Pradesh, is located in the central region of the state. Lucknow city is situated on the bank of river Gomti—an alluvial river of the Ganga Plain, which divides the city into two parts—Cis-Gomti and Trans-Gomti. Around 47% of the households in Lucknow are dependent upon Onsite Sanitation Systems. The Bharwara STP, recognized as Asia’s largest STP, is located at Bharwara in Gomti Nagar, Lucknow.It works as a gap filling FSSM approach with co-treatment of FSS. Operator of STP is Suez India Private Limited.
 
 
 

The STP is based on Upflow Anaerobic Sludge Blanket (UASB) Reactor technology. The sewage & septage at the inlet of the plant comes from the main pumping station at Gwari. From the inlet, the wastewater flows through mechanical screens.

The wastewater then flows to Upflow Anaerobic Sludge Blanket (UASB) reactors. The end product of the process is biogas, which is presently flared into the atmosphere. The sludge generated from the reactor is sent to a sludge pumping station from where it is being pumped to sludge drying beds. The treated wastewater from the UASB reactor is then taken to the pre-aeration tank, where the wastewater is aerated with the help of surface aerators. From the pre-aeration unit, treated wastewater is then taken to final polishing pond, where the wastewater is kept for 24–48 hours. From final polishing pond, the treated wastewater is taken to chlorine contact chambers. Here the water is chlorinated, which kills the pathogens in the water. Finally, the water is released from the outlet of the STP to the river Gomti.

The co-processing of faecal sludge in the Bharwara STP is conducted by mixing septage from the tanker with sewage water in pumping stations.

Figure 2: Process flow of faecal sludge

Performance of the Co-treatment

Physicochemical and biological parameters of the samples tested

S. no

Month

Sample location

pH

TS (mg/L)

TDS (mg/L)

TSS (mg/L)

COD (mg/L)

BOD (mg/L)

TKN (mg/L)

Ammoniacal nitrogen (mg/L)

Total phosphate (mg/L)

Faecal coliform (MPN/100 ml)

1

Nov
2019

Fresh faecal sludge

7.52

70,075

NT

NT

87,700

4,880

2,580.03

856.73

330

4,300,000

2

Nov
2019

Co-treated wastewater

7.63

820

708

112

422

143

78.04

54.85

6.4

750,000

3

Nov
2019

Inlet STP

7.79

774

672

102

270

89

66.39

38.54

5.8

1,100,000

4

Nov
2019

UASB outlet

8.11

705

602

99

110

46

54.16

32.85

3.9

46,000

5

Nov
2019

Outlet before chlorination

7.75

684

627

57

93

23

42.8

26.26

3.2

93,000

6

Nov
2019

Outlet after chlorination

8.29

589

552

37

92

21

23.59

34.65

3.1

93,000

1

Dec
2019

Fresh faecal sludge

7.3

55,120

NT

NT

76,400

7430

2,114.11

375.69

145

2,300,000

2

Dec
2019

Co-treated wastewater

6.94

672

555

117

256

83

43.97

30.54

6.9

4,300,000

3

Dec
2019

Inlet STP

7.01

785

698

87

530

100

40.18

28.61

6.8

210,000

4

Dec
2019

UASB outlet

7.64

644

569

75

197

51

35.52

33.59

3.5

290,000

5

Dec
2019

Outlet before chlorination

7.31

582

516

66

39

18

36.1

31.54

2.3

43,000

6

Dec 2019

Outlet after chlorination

7.28

572

514

58

53

12

32.9

30.95

2.1

23,000

Source: CSE 2020
 

Current status

Around 30-35 vacuum tankers of capacity 4000-5000 litresare received per month.
 
 

Mr Rajesh Kumar
General Manager (GM)
UP Jal Nigam, Lucknow Uttar Pradesh, India
Contact No: -+91 9415135606
Email: raajsesh62kumaar@gmail.com

 
 

Last updated-July 02, 2020
 
 

 

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