Silicon Valley Advanced Water Purification Center Conception to - - PowerPoint PPT Presentation

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Silicon Valley Advanced Water Purification Center Conception to Delivery Sanjay Reddy Black & Veatch Corporation Cong Mai Santa Clara Valley Water District, San Jose, CA WateReuse Association, Nor Cal Chapter Meeting San Jose, CA

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Silicon Valley Advanced Water Purification Center – Conception to Delivery

Sanjay Reddy Black & Veatch Corporation Cong Mai Santa Clara Valley Water District, San Jose, CA WateReuse Association, Nor Cal Chapter Meeting San Jose, CA September 27, 2013

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South Bay Water Recycling

 Operated by City of

San Jose

 SBWR services

Milpitas, Santa Clara, and San Jose

 System consists of

100 miles of “purple pipe”

 During the summer,

an average of 15 MGD is produced and distributed to 500 customers

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Who is Santa Clara Valley Water District?

 1,300 square miles service area

encompassing Santa Clara County

 County’s primary water resources agency  700 miles of creeks and rivers  10 reservoirs, 44 recharge facilities  Serving 1.8 million residents  Wholesale water to 13 retailers

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 Improve public acceptance of recycled water  Ability to increase regulators comfort zone  Reduce the amount of treated effluent discharges

into San Francisco Bay

 Expand recycled water use in the county

 Diversify water supplies  Meet recycled water use goals

Primary Drivers for Silicon Valley Advanced Water Purification Center (SVAWPC)

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Goals of SVAWPC

 To Produce High-Purity Recycled Water (RW)

 Reduce Salinity / TDS to increase marketability  TDS of tertiary effluent – 750 mg/L  TDS of AWPC effluent – 50 mg/L

 Meet current max week SBWR recycled water

demand

 Meet future water quality requirements

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Major Components of the SVAWPC

 Membrane Filtration

 Micro-filtration

 Reverse Osmosis  Ultraviolet Disinfection

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Filtration Range of MF and RO

0.001 - 0.0001 micron

MICROFILTRATION ULTRAFILTRATION REVERSE OSMOSIS NANOFILTRATION

TSS/Turbidity Cryptosporidium Giardia Virus TDS Hardness DOC Bacteria

0.1 micron 0.1 - 0.01 micron 0.01 - .001 micron

Metal Ions Color Organics H H O

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Recycled Water Projections

5,000 10,000 15,000 20,000 25,000 2010 2015 2020 2025 2030 Year Recycled Water Projections (Acre-feet) City of Santa Clara San Jose Municipal Water San Jose Water Company City of Milipitas Total

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SBWR Recycled Water Demand (July 2003 - August 2007)

0.00 5.00 10.00 15.00 20.00 25.00 6/28/03 4/23/04 2/17/05 12/14/05 10/10/06 8/6/07

Time Recycled Water Demand (mgd)

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AWPC Siting Alternatives

Site No. 1 Site No. 2

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Capacity Evaluation Summary

AWPC Major Processes Capacity Overall AWPC Production 8.0 MGD Membrane Filtration (MF) 11.2 MGD (feed) 10.0 MGD (filtrate) Reverse Osmosis 9.4 MGD (feed) 8.0 MGD (filtrate) UV Disinfection System 10.0 MGD Product Water Storage Tank 2.0 MG

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Impact of Blend Ratio on TDS

1.8

Tertiary Effluent TDS = 750 mg/L; RO Permeate TDS = 50 mg/L

100 200 300 400 500 600 0.0 0.5 1.0 1.5 2.0 Blend Ratio (Tertiary Effluent : RO Permeate) Recycled Water TDS, mg/L

1.8

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Treatment Train – Summer

MF  RO  UV

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Treatment Train – Winter

MF  RO  UV MF  UV

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Facility Layout

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Start-Up and Commissioning

 Component Testing

 Operational Readiness Testing (ORT)  Preliminary Field Testing (PFT)  30-Day System Testing  8-Day Field System Operations Testing

(Acceptance Testing)

 Plant Commissioning Test (PCT)

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AWPC Construction Updates

 Work started in November 2010  Construction nearly complete  Start-up / commissioning – On going  Total construction cost: approx. $44 million

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