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Innovative Water ManagementGuruprakash Sastry

Regional Head – Infrastructure/Green Initiatives

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About

Infosys

• 2nd largest IT company in India – USD 10 Billion

• 200,000+ employees

• 45 million sq.ft. of space (including 14710 guest rooms)

• Campuses across India – offices, training facilities, food courts, guest rooms, amenities, etc.

• Annual power consumption (FY2017) : 267 million kWh

• Annual water consumption (FY2017) : 3.2 billion liters

• Aggressive goals on energy and water consumption reduction

• Dedicated team of experts to drive efficiency initiatives

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Water Efficiency

Strategy

Reduce

Recycle Reuse

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Water Efficiency by design

New Buildings

Office buildings 25 liters/person 45 liters/person 45%

Food Courts 40 liters/seat 70 liters/seat 43%

Guest House 90 liters/person 135 liters/person 33%

Shower 6 liters/min 12-16 liters/min 50%

Taps 1.9 liters/min 6-9 liters/min 68%

WC 3-6 liters/flush 6-9 liters/flush 50%

ImprovementInfosys Design

StandardsBuilding Type National Building

Code/UPCI

Significantly better than standards on all end use consumption benchmarks

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Water Conservation in

Existing Buildings

End Use Consumption Strategies

Low flow fixtures – Taps, Shower

heads, Health Faucets

Pressure Compensating Aerators

(PCA)Sensor controlled taps

Pressure regulating valves at

buildings

Landscape retrofits, Native

plantation

Root zone irrigation Employee awareness campaigns

Dual flush system

Artificial Grass at

Infosys MysoreSmart water metering

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Water Conservation in

Existing Buildings

Water Distribution & Treatment Strategies

Re-engineering &

replacement of leaky

distribution pipes

Re-engineering &

replacement of MS pipes

for fire lines

Efficient water treatment

technologies – EDR

technology

Using condensate water

for cooling towers

Employee awareness

campaigns

26% reduction in per capita water consumption in Pune phase 2

campus through re-engineering and replacement of pipes

Over 100 km of pipe installed

3 times higher life (50 years life span)

New Buildings/Campuses Existing Buildings/Campuses

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Water Recycling

100% of waste water is recycled and reused

100% of waste water is recycled

Efficient treatment technology - Membrane bio-

reactor (MBR) technology

Recycled water is used for irrigation, flushing and

air-conditioning

Retrofits to upgrade treated water quality in

line with new CPCB norms

Retrofits to reduce waste water treatment

cost

Dual piping system retrofits in existing buildings

100% Waste Water

from buildings

Sewage Treatment Plants

(STP)

Flushing

Irrigation

Air-conditioning

100% REUSE

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Rain water harvesting

Harvest 100% of on-site rain water

Natural and Artificial

lakes/ponds on campus to

harvest rain water

Roof top rain water

harvesting systems (New &

retrofits)

Deep well injection

system to recharge

ground water

35 lakes across campuses in India Roof top rain water harvesting 270+ deep well injection systems

(Holding capacity of 330 million liters) (Partially executed across campuses) (Recharge capacity of 13.5 million liters per day)

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Efforts on

Water Efficiency

Rain water

harvesting on

Infosys

campuses

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Rain water

harvesting on

Infosys

campuses

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2011-12 2012-13

3.28 3.3 3.32

3.07

2.47

2.17 2.15 2.21

1.921.77

0

0.5

1

1.5

2

2.5

3

3.5

4

2016-172007-08 2008-09 2009-10 2010-11 2013-14 2014-15 2015-16

Month

ly C

onsum

ption in

KL / E

mplo

yee

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Achievement on

Water Efficiency

109 liters/person per day in FY08 � 59 liters/person per day in FY17

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Achievement on

Water Efficiency

• Smart water metering implemented

• Real time monitoring of water balance in each

campus

• Identify opportunities for improvement

• Identify leaks in the water network

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Innovative

Water Efficiency Strategies

• Soil moisture sensor

- smart irrigation

- over 30% savings

• Rain sensor

- switch off irrigation system during rainfall

- easy to install

• Condensate recovery from Air Conditioning system

- 100 TR system � 2000 liters/day possible

- v useful in humid climate

• Rainwater harvesting

- 2000 sq.ft roof � twice the requirement of a family of 4

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Water conservation is critical

• Realize actual value of water

• You can only control what you measure

Thank YouGuruprakash_Sastry@Infosys.com