SanDisk Confidential

FACTORY Green Initiatives in SDSSHem Takiar 

Jul 14th, 2015

SanDisk Confidential

SDSS ‐ SanDisk Semiconductor (Shanghai) Co., Ltd.

SanDisk Confidential

SDSS Introduction 

CSR99% participant; 3,300

+hrs

AwardsGolden Bee Innovation       Green

SanDisk Confidential

SDSS Water Usage MapDomestic274

Facility3701

Canteen120

Toilet70

Drinking water60

Laundry24

Total water usage: 7156  ton/day

Process3181

Backgrinding1563

Wafer saw972

Package saw410

SMT144

Others92

DI plant3369

Cooling water991

Sprinkler for N2 evaporator

757

Landscaping120

Boiler50

SanDisk Confidential 5

SDSS Water Recycling Map• Process Usage Water

70% recycled(2230 of 3181 ton)

Backgrind

39% recycled(612 of 1563

ton)

Other Process

100% recycled

(1618 of 1618 ton)

951 tondrainage

• Facility Usage Water

88% recycled(3265 of 3701 ton)

DI plant

98% recycled

(2485 of 2540 ton)

55 tondrainage

Cooling tower

77% recycled(757of 991

ton)

234 tonvaporized

Boiler

48% recycled

(24 of 50 ton)

26 ton humidified

Landscape

0% recycled

(0 of 120 ton)

120 ton drainage

• Domestic Water

44% recycled(120 of 274 ton)

154 tondrainage

120 ton waste water recycled from the drainage of toilets,

canteen, laundry and drinking water

SanDisk Confidential 6

SDSS Water Reuse Map ‐ 1

Domestic recycled water: 120 ton(Toilets, canteen, laundry and drinking water)

Landscaping: 120 ton

Recycled Water Usage

Process recycled water: 1530 tonDI plant recycled water: 1833 tonCondensation from air‐con: 45 ton

DI plant (raw water and RO incoming water): 3408 ton

Recycled Water Usage

Boiler recycled water: 24 ton(Condensation of steam)

Raw water of boiler: 24 ton

Recycled Water Usage

SanDisk Confidential 7

SDSSS Water Reuse Map ‐ 2

Water reclamation chart

Detail

Process recycled water: 510 tonDI plant recycled water: 481 ton

Cooling tower: 991 ton Sprinkler of N2 vaporizer: 757 ton

Recycled Water Usage 1 Usage 22nd

Recycled

Cooling water of vacuum for Backgrind & Package saw : 660 ton

Raw water of DI plant: 660 ton

DI plant recycled water: 660 ton 

Recycled Water Usage 1 Usage 22nd

Recycled

SanDisk Confidential

Total water usage of 7156 ton/day. Total effective water recycled of 5960 ton/day (83.3%).Annual water tonnage savings of 2,175K ton

Equal to 7.25K families’ annual water consumption.Annual water $ savings of $1.84M.

SDSS Water Recycling Deliverables

`

SanDisk Confidential

SDSS Annual Water Recycled Trend

9

24.3%

35.2%

65.1%

83.3%

2012 2013 2014 2015

539778

1437

1840

Annual water saving (K$)Water reclamation %

SanDisk Confidential

SDSS Water Recycling Journey

10

DI reverse Osmosis reject water recycling

DI EDI & 2nd RO reject water recycling

Boiler condensed water recycling

W/S, P/S waste  water recycling

B/G waste water recycling

W/S, P/S, SMT, B/A waste water recycling

Water repeated usage from cooling tower, VAC cooling water & treated P2 sewage recycling

RO rinse water & carbon filter forward washing reject recycling

Phase I DI RO recycling 

Air‐con condensed water recycling

UF4 to recycle UF backwash reject and W/S P/S waste water

Phase 2 B/G waste water recycling

24.3%

10.9%

29.8%

18.3%

2012 2013 2014 2015

1739780

2135

1306

Reclaimed Water(Ton/day)Reclamation Ratio %

Total recycled 5960 (ton/day), 83.3%

SanDisk Confidential

Backup

11

SanDisk Confidential

Thermo Reclamation System Summary

0

200000

400000

600000

800000

1000000

1200000

2012 2013 2014 2015

Gas Yearly Saving(m3)

Cost Yearly Saving($)

Expon. (Gas YearlySaving (m3))

Expon. (Cost YearlySaving ($))

Date ProjectReclaimed Thermo(kw)

Reclaim Ratio Purpose

2012 PI Air compressor thermo reclamation 1600 16.46%

DI raw water heating & environmentcontrol.

2013 PII air compressor thermo reclamation 1365 14.04%

DI raw water heating & environmentcontrol.

2014 Thermo from reclaimed water 1457 14.99% Reduce DI raw 

water heating.

2015 Boiler exhausted thermo reclamation 528 5.43% Boiler softened 

water heating

Total 4950 50.92%

50.92%.905.9 Km3, 

2.52K594K$.

‐ Thermo source at air compressors which are exchanged by the thermoreclamation sets.

‐ Reclaimed thermo to heat DI raw water, air‐con hot water and process  hot DI.

‐ Thermo source at boilers’ exhaust which are exchanged by thermo reclamation  sets.

‐ Reclaimed thermo to heat boiler softened  raw water.

SanDisk Confidential

LED Lighting Utilization & Lighting Management System 

13

Date ProjectMonthly 

Power saving(kwh)

Purpose

2011LED lighting replacement in Building I

122538Replace all the lightingswith LED lighting in building I

2012 LED lighting utilizationin Building II 91952 Utilize LED lighting in 

Building II

2013 Lighting managementsystem in office area 115729 Turn on/off lighting and 

air‐con automatically

2014 Lighting management system in clean room 105030 Turn on/off lighting 

automatically

Total  435249

5.22 million kWH, 4.35 K

546K$.

Before: T8 (40/62W) After: T8 (12/28W)

Before: Street lighting (250W) After: Street LED lighting (120W)

Occupied sensor and controller of lighting management system to turn on/off lighting and air‐con automatically.

0100000200000300000400000500000

2011 2012 2013 2014

Monthly power saving byLight management system(kWH)

Monthly power saving byLED (kWH)