NAGAR PANCHAYAT WADWANI

Name of Work: Wadwani Water Supply Scheme

Tq.: Wadwani, Dist.: Beed

Name of Document: SCADA & Automation

Process Description

End User: - Consultant: - Contractor: -

Nagar Panchayat Maharashtra Jeevan Elecon Energy

Wadwani Pradhikaran Solutions Pvt. Ltd.,
Navi Mumbai
 Index

Sr. No. Section Page No.

1 Process & Instrumentation Diagram (P&ID) 2
2 Equipment’s and Instrument 2
3 General Process Description 4
4 Process Flow Diagram 6
5 Process Parameter 7
6 Process Interlock 8
7 General Alarms 8
8 Annexure A 9

Wadwani WSS – Process Description Document 1

 1. Process & Instrumentation Diagram (P&ID):
Refer annexure A for P&ID.

2. Equipment’s and Instrument:

Below table describe all equipment and instrument, location, and purpose at Raw Water Pump
House:
Sr.No. Equipment/Instrument Location Purpose
To deliver raw water to WTP
1 Pump Water Delivery line
inlet
2 Sluice Valve Water Delivery line Control raw water flow
3 Electric operated Actuator Sluice Valve Control opening/Closing of valve
4 Level Transmitter Jackwell Measure water level in jackwell
Measure pump discharge
5 Pressure Transmitter Pump discharge head
pressure
Measure water flow rate & total
6 Flow Transmitter Header line
flow
7 Power Analyzer Starter Panel Monitor all electrical parameter
Monitor, control all equipment
8 PLC Panel ESR
and instruments.

Below table describe all equipment and instrument, location, and purpose at WTP:

Sr.No. Equipment/Instrument Location Purpose

1 Turbidity Analyzer Aeration Fountain Monitor raw water turbidity
2 pH Analyzer Aeration Fountain Monitor raw water pH
3 Open Channel Flow meter Parshall Flume Monitor flow at WTP inlet
Removal of readily settable
4 Clariflocculator WTP
solids and suspended particles
5 Level Transmitter Filter Bed Monitor Filter Bed water level
Allows settled water from
6 Sluice Valve – 300mm Filter Bed – Filter Inlet
clarifier to filter
Allows clean backwash water
Filter Bed – Filter Wash
7 Sluice Valve – 250mm into filter for filter bed
Water Inlet
Backwashing

Wadwani WSS – Process Description Document 2

 Allows first filter water out to
8 Sluice Valve – 250mm Filter Bed – Filter Drain
drain
9 Sluice Valve – 150mm Filter Bed – Filter Outlet Allows treated water out of filter
Allows backwash air into filter
10 Sluice Valve – 100mm Filter Bed – Air Inlet
for filter bed Backwashing
11 Actuator Filter Bed Control opening/Closing of valve
12 Back Wash Water Pump Filter Water Outlet Channel Deliver water to overhead tank
Compressed air for filter bed
13 Air Blower WTP
washing
Monitor, control all equipment
14 PLC Panel ESR
and instruments.

Below table describe all equipment and instrument, location, and purpose at Pure Water Sump
House:

Sr.No. Equipment/Instrument Location Purpose

1 Turbidity Analyzer Pure Water Sump inlet Monitor raw water turbidity
2 pH Analyzer Pure Water Sump inlet Monitor raw water pH
3 Chlorine Analyzer Pure Water Sump inlet Monitor residual chlorine
Monitor pure water sump water
5 Level Transmitter Pure Water Sump
level
6 Pressure Transmitter Pure Water outlet line Pressure at Pure Water outlet line
7 Flow Transmitter Pure Water outlet line Monitor flow rate and total flow
Monitor, control all equipment
8 PLC Panel ESR
and instruments.

Below table describe all equipment and instrument, location, and purpose at MBR, ESR:

Sr.No. Equipment/Instrument Location Purpose

1 Level Transmitter Tank Monitor level
2 Pressure Transmitter Inlet line Monitor Pressure
3 Flow Transmitter Inlet line Monitor flow rate and total flow
Control flow rate at specific
5 Flow Control Valve Inlet line
setpoint

Wadwani WSS – Process Description Document 3

 Monitor, control all equipment
6 PLC Panel ESR
and instruments.

3. General Process Description:

The main process of water treatment plant consists of following units:
• Raw water collection
• Screening & Straining
• Mixing (Chemical Addition)
• Coagulation and Flocculation
• Sedimentation and Clarification
• Filtration
• Disinfection
• Storage
• Distribution

Raw Water Collection: - Raw water from Upper Kundalika Dam will pump to conventional
WTP at Wadwani with the help of 2 nos. of 75HP pumps. Out of two pumps, one is working
and other one is standby. Water flow is continuously monitored by flow meter at header line.
Flow rate is controlled by electrically actuated sluice valve.

Screening & Straining: - Raw water contain varying amount of suspended and dissolved
materials. This material may include turbidity, colour, taste, odour, microorganisms, fish,
plants, trees, trash, etc. So, the first process in conventional water treatment is to screen or
strain out the larger items. This raw water is then passed through the Aeration Fountain.
Aeration brings water and air in closed contact to remove dissolved gases. Water quality is
monitored here by using Turbidity and pH analyzer.

Mixing (Chemical Addition): - Once the pre-screened source water is received into the
treatment plant, chemicals are added to help make the suspended particles that are floating in
the water clump together to form a heavier and larger gelatinous particle, often called floc. In
this process, a chemical is added that reacts with the natural alkalinity in solution to form an
insoluble precipitate. There are many different chemicals on the market that are used in this

Wadwani WSS – Process Description Document 4

process. These chemicals are called coagulants. Here alum and lime is used. This chemical is
inserted into the raw water using PAC dosing system. Flash mixer then mixes the raw water
and chemicals to maintain turbidity and pH.

Coagulation and Flocculation: - A rapid mix unit is usually used where the coagulant is added
to the water to provide a very quick and thorough mixing. The water mixing is then slowed to
allow the water to come in contact with the forming floc and allow it to increase in size. The
continued mixing must be gentle to allow the floc to grow and gain weight, but fast enough to
keep it in suspension until you are ready for it to settle in the clarifiers. The process of adding
a chemical to cause the suspended material to “clump” into larger particles is called
flocculation or coagulation. The treatment unit where coagulation and flocculation are
performed is called the “Flocculator”

Sedimentation and Clarification: - Once the flocculation process is complete, the water then
passes over the weir in the flocculator and travels to the centre of the clarifier, or sedimentation
basin. Here, the water makes its way from the centre of the clarifier to the saw tooth weir at the
perimeter of the unit. As the water makes its way towards the weir, the large floc particles are
allowed to settle out to the bottom of the clarifier. A rake continuously travels across the bottom
of the clarifier and scrapes the settled floc to the centre of the unit. Pumps are used to pull the
settled “sludge” out of the clarifier and send it to a sedimentation / disposal pond. The water
that passes over the weir is collected and transferred to the filters. The reason clarification
occurs before filtration is so most of the suspended material can be removed prior to filtration,
which avoids overloading the filters and thus allowing much more water to be filtered before
the filters must be backwashed.

Filtration: - Clarified water enters the filters from the top. Gravity pulls the water down
through the filters where it is collected in a drain system at the bottom of the unit. There are
many different types of materials (media) used in filters. The most common being sand and
gravel. Many conventional plants are now using granular activated carbon as the media of
choice because it not only provides excellent mechanical filtration of particulate matter, but
also removes organic compounds which can cause taste and odour problems.

Disinfection: - Once the water has gone through the filtration process, it is about as clear and
clean as it can get. However, there may still be bacteria and viruses remaining. To ensure these

Wadwani WSS – Process Description Document 5

are destroyed, there must be a disinfection process employed. The most common disinfection
process used is chlorination. Chlorine comes in many different forms including chlorine gas
(most common), chlorine dioxide, hypochlorite (bleach), and others. Whichever method is
used, chlorine is added to the water in an amount to ensure all microorganisms are destroyed.
Water plants monitor the chlorine levels continuously and very carefully in the treated water.
They must add enough chlorine to ensure thorough disinfection of the water but avoid adding
excesses that can cause taste and odour problems when delivered to the consumer. Here water
quality is monitored with turbidity, pH and residual chlorine analyzer.

Storage: - Once the disinfection process is complete, the water is stored. Storage usually takes
place in an underground storage tank called a “Pure Water Sump”.

Distribution: - The pure water is then distributed to different MBR & ESR with the help of
pump operation.

4. Process Flow Diagram:

HEADWORKS Raw Water PT, LT, FT

ORKS
WTP FT, PH, TA Aeration Fountain

Flash Mixer

ClariflocculatorOR
Recycle Tank &
PUMP
Filter Bed LT, FT

PH, TA, CLA Pure Water PT, LT, FT

ESR MBR, GSR, ESR FCV, PT, LT, FT

DDDGSR,E
Figure: Process Flow Diagram

Wadwani WSS – Process Description Document 6

 • As shown in above figure, raw water from headworks flows to WTP. Pressure
transmitter (PT) gives pump discharge pressure, Level transmitter (LT) gives jackwell
level, and flow transmitter (FT) gives header flow rate and total flow to WTP.
• At WTP, raw water comes at aeration fountain where aeration brings water and air in
closed contact to remove dissolved gases. Turbidity and pH of raw water is monitored
here.
• After aeration fountain, PAC dosing inserted into to raw water at Parshall flume. Flash
mixer then mixes the mixture properly.
• Now water enters the clariflocculator where sedimentation, coagulation and
flocculation are done.
• Settle water then travel through the filtration process where filter beds are come in
action. Water flows downward by gravity through sand filter. LoH and RoF is
calculated here by using level transmitter (LT) to decide backwash condition.
• Filter water is now stored in Pure Water sump where disinfection (Chlorine) is added.
• The pure water is now distributed to ESR by using pump operation. Turbidity, pH and
chlorine is monitored here.
• At ESR, flow is controlled by operating flow control valve. Level transmitter (LT) is
used to get level of tank. Flow transmitter (PT) is used to maintain constant flow rate
and get total flow.

5. Process Parameter:
Following are the process parameter that are used in water treatment process:
• Jackwell water level
• Pump Discharge Pressure
• RWPH Header Flow
• Turbidity & pH
• LoH (Loss of Head)
• RoF (Rate of Flow)
• Pure Water Sump level
• ESR water level
• ESR inlet flow rate

Wadwani WSS – Process Description Document 7

6. Process Interlock:
Interlocks to start pump:
• Water level of sump must be in between low & high level
• Trip circuit must be healthy
• Pump must be in Remote mode
• Open valve up to 40% then start pump
• All electrical parameters must be healthy
Filter Bed Backwash Interlocks:
• Close filter inlet valve
• Close filter outlet valve
• Open air inlet valve
• Run air blower for pre-set time duration
• Close air valve
• Open BWW valve for pre-set time duration
• Close BWW valve
• Open Drain Valve
• Open Filter inlet valve
• Drain first filter water
• Close drain valve
• Open filter outlet valve
ESR Operation Interlocks: -
• If tank level is low, then open flow control valve.
• If tank level high, then close flow control valve.

7. General Alarms:
Following are the general alarms in the process:
• Pump trip due to overload
• Pump trip due to over voltage
• Pump trip due to low water level in sump
• Pump trip due to low pressure
• Sump level low
• Sump level high

Wadwani WSS – Process Description Document 8

 • Filter Bed Backwash
• ESR Tank level low
• ESR Tank level high

Annexure A

Wadwani WSS – Process Description Document 9

 SERVICE LINE
AIR PIPELINE
LT-BWT
01 BWW PIPELINE
AIR BLOWER
DRAIN PIPELINE
WTP-AB-VLV01
PT-PW
AB DOSING PIPELINE
WTP-AB-VLV02 AIR BLOWER - 1 RAW WATER PIPELINE

SETTLE WATER PIPELINE

AIR BLOWER - 2
PURE WATER PIPELINE
LT-01
FB1

FB1-AIRBLOWER VLV1 FB1-BWWIN VLV1

PAC-MTR-01 PAC-MTR-02 PAC-MTR-03

FB1-FILTERIN VLV FB1-DRAIN VLV
LS LS LS LS LS LS
01 02 03 04 05 06

FB1-AIRBLOWER VLV2 FB1-BWWIN VLV2

FB1-FILTEROUT VLV1 FB1-FILTEROUT VLV2

LT-02

PAC-VLV-01
PAC-VLV-02
PAC-VLV-03
FB1

LT-03
FB2

FB2-AIRBLOWER VLV1 FB2-BWWIN VLV1

CLF-M-03
CLF-M-01 CLF-M-02 CLF-M-04 CLF-M-05

FB2-FILTERIN VLV FB2-DRAIN VLV

CLF-DRAIN VLV
WTP-BWW-VLV02

WTP-BWW-VLV01

FB2-AIRBLOWER VLV2 FB2-BWWIN VLV2

FB2-FILTEROUT VLV1 FB2-FILTEROUT VLV2
WTP-BWW-PMP02

WTP-BWW-PMP01

LT-04
FB2
BWW-EM1
LEGENDS
TO SLUDGE DRAIN SR.NO SYMBOL DESCRIPTION

01 MOTORISED VALVE

WTP-FM 02 GATE VALVE

TA-WTP PH-WTP FT-WTP
01 01 01
INLET TO CLARIFLOCCULATOR 03 SOLENOID VALVE

04 CONTROL VALVE

WTP WTP 05 MOTOR

06 AIR BLOWER

07 PUMP

FT-RW 08 LEVEL SWITCH

01

09 LEVEL TRANSMITTER

10 PRESSURE TRANSMITTER

11 TURBIDITY ANALYZER

12 PH ANALYZER

13 FLOW TRANSMITTER

RWPH-VLV02

RWPH-VLV01
14 CHLORINE ANALYZER
PT-01 PT-02
RW RW 15 XX-EMX POWER ANALYZER
LT-MBR
01 PT-MBR FT-MBR
01 01
LT-01 CT-PW TA-PW PH-PW LT-01
RW RW 16 ESR ELEVATED SYSTEM RESERVIOUR
01 01 01

RWPH-PMP01
RWPH-PMP02
MBR 17 RWPH RAW WATER PUMP HOUSE
WTP PREMISES MBR-INLET-VLV01
RW-EM1 RW-EM2
18 PWPH PURE WATER PUMP HOUSE
JACKWELL MBR-OUTLET-VLV01 PURE WATER SUMP
19 WTP WATER TREATMENT PLANT

RAW WATER PUMP HOUSE (FROM RW SUMP TO WTP) MBR (WTP PREMISES) PURE WATER SUMP

B CUSTOMER: NAGARPARISHAD WADWANI

CONSULTANT: MAHARASHTRA JEEVAN PRADHIKARAN
CONTRACTOR: ELECON ENERGY SOLUTIONS PVT. LTD.
PROJECT: WADWANI WATER SUPPLY SCHEME DATE: 09-09-2021
TITLE: P&ID - WADWANI WSS WTP
A
DRAWING NO.: MJP/WSS-WADWANI/P&ID-01 REV: R1
FORMAT: A3 PAGE NO.: 01 OF 02
 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1

M SERVICE LINE
LT-MBR
01 AIR PIPELINE

FT-ESR PT-ESR LT-ESR BWW PIPELINE

01 01 01
MBR
DRAIN PIPELINE
WTP PREMISES
BICHKULDHARA DOSING PIPELINE
MBR-OUTLET-VLV01 ESR-INLET-VLV01
L ESR RAW WATER PIPELINE

SETTLE WATER PIPELINE

ESR-OUTLET-VLV01
PURE WATER PIPELINE

FT-ESR PT-ESR LT-ESR

02 02 02
K
CHAUFULDHARA
ESR-INLET-VLV02
ESR

ESR-OUTLET-VLV02

J
FT-ESR PT-ESR LT-ESR
03 03 03

SARKARKHURI
ESR-INLET-VLV03
ESR

I ESR-OUTLET-VLV03

FT-ESR PT-ESR LT-ESR

04 04 04

H SALIMBA ROAD
ESR-INLET-VLV04
ESR

ESR-OUTLET-VLV04
LEGENDS
SR.NO SYMBOL DESCRIPTION

01 MOTORISED VALVE

02 GATE VALVE
G FT-ESR PT-ESR LT-ESR
05 05 05
03 SOLENOID VALVE

BAJRTAL 04 CONTROL VALVE

ESR-INLET-VLV05
ESR.
05 MOTOR
ESR-OUTLET-VLV05
06 AIR BLOWER
F
07 PUMP

FT-ESR PT-ESR LT-ESR 08 LEVEL SWITCH

06 06 06

09 LEVEL TRANSMITTER
DALMIL
ESR-INLET-VLV06 10 PRESSURE TRANSMITTER
ESR
E
11 TURBIDITY ANALYZER
ESR-OUTLET-VLV06

12 PH ANALYZER

13 FLOW TRANSMITTER

14 CHLORINE ANALYZER
D
15 XX-EMX POWER ANALYZER

16 ESR ELEVATED SYSTEM RESERVIOUR

17 RWPH RAW WATER PUMP HOUSE

18 PWPH PURE WATER PUMP HOUSE

C
19 WTP WATER TREATMENT PLANT

B CUSTOMER: NAGARPARISHAD WADWANI

CONSULTANT: MAHARASHTRA JEEVAN PRADHIKARAN
CONTRACTOR: ELECON ENERGY SOLUTIONS PVT. LTD.
PROJECT: WADWANI WATER SUPPLY SCHEME DATE: 09-09-2021
TITLE: P&ID - WADWANI WSS WTP
A
DRAWING NO.: MJP/WSS-WADWANI/P&ID-01 REV: R1
FORMAT: A3 PAGE NO.: 01 OF 02