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

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

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 B&V - 2

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 B&V - 3

Primary Drivers for Silicon Valley Advanced Water Purification Center (SVAWPC)  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 B&V - 4

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 B&V - 5

Major Components of the SVAWPC  Membrane Filtration  Micro-filtration  Reverse Osmosis  Ultraviolet Disinfection B&V - 6

Filtration Range of MF and RO TSS/Turbidity Giardia Bacteria Cryptosporidium MICROFILTRATION 0.1 micron Organics Virus ULTRAFILTRATION 0.1 - 0.01 micron DOC Color Hardness NANOFILTRATION 0.01 - .001 micron Metal Ions TDS 0.001 - 0.0001 micron REVERSE OSMOSIS H H O B&V - 7

Recycled Water Projections 25,000 City of Santa Clara San Jose Municipal Water Recycled Water Projections (Acre-feet) 20,000 San Jose Water Company City of Milipitas Total 15,000 10,000 5,000 0 2010 2015 2020 2025 2030 Year B&V - 8

SBWR Recycled Water Demand (July 2003 - August 2007) 25.00 Recycled Water Demand (mgd) 20.00 15.00 10.00 5.00 0.00 6/28/03 4/23/04 2/17/05 12/14/05 10/10/06 8/6/07 Time B&V - 9

AWPC Siting Alternatives Site No. 1 Site No. 2 B&V - 10

Capacity Evaluation Summary AWPC Major Processes Capacity Overall AWPC Production 8.0 MGD 11.2 MGD (feed) Membrane Filtration (MF) 10.0 MGD (filtrate) 9.4 MGD (feed) Reverse Osmosis 8.0 MGD (filtrate) UV Disinfection System 10.0 MGD Product Water Storage Tank 2.0 MG B&V - 11

Impact of Blend Ratio on TDS Tertiary Effluent TDS = 750 mg/L; RO Permeate TDS = 50 mg/L 600 Recycled Water TDS, mg/L 500 400 300 200 1.8 100 1.8 0.0 0.5 1.0 1.5 2.0 Blend Ratio (Tertiary Effluent : RO Permeate) B&V - 12

Treatment Train – Summer MF  RO  UV B&V - 13

Treatment Train – Winter MF  RO  UV MF  UV B&V - 14

Facility Layout B&V - 15

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) B&V - 16

AWPC Construction Updates  Work started in November 2010  Construction nearly complete  Start-up / commissioning – On going  Total construction cost: approx. $44 million B&V - 17

Questions?  Sanjay Reddy (reddysp@bv.com)  Cong Mai (cmai@valleywater.org) B&V - 19