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148x Filetype PDF File size 2.62 MB Source: www.sandiego.gov
Innovation for Future Water Supply process to ensure that an anomaly at any given treatment step would not Reverse osmosis purifies
compromise public health. Here is a look at the process: the water to a level
similar to distilled water
The Advanced Water Purification Facility is the focal point of the City of Membrane Filtration – quality. This process is
San Diego’s Water Purification Demonstration Project (Demonstration used by the bottled water
Project). This project is vital to San Diego’s future and is a critical step Barrier 1 1 2 3 industry.
towards developing a local, sustainable and reliable water supply. This The first step in the water purification
state-of-the-art facility, located at the North City Water Reclamation process is membrane filtration. Two types
Plant, is using the most advanced technologies to purify one million of membrane filtration systems are being
gallons of recycled water per day. tested — microfiltration and ultrafiltration —
to determine which is most effective. This
treatment step uses a series of membrane
filtration canisters that Ultraviolet Disinfection/Advanced Oxidation –
remove contaminants
2 in the already-treated Barrier 3
Barrier 1 Reverse Osmosis recycled water.
Water Step three of the purification process is advanced oxidation through
Storage the use of ultraviolet (UV) light and hydrogen peroxide. Inside the
Inside the membrane vessel shown to the right is a
filtration canisters are high intensity light, similar to
1 3 hollow fibers that block extremely concentrated sunlight,
1 unwanted materials that provides disinfection.
n Ultraviolet like suspended solids,
o
i on
t i Light/ bacteria and protozoa from passing through. The filters are extremely Hydrogen peroxide
ra t
t a Advanced
l r is added and reacts
t Oxidation efficient and are tested daily to confirm their consistent removal of
rafi fil with the light to form
t ro
l c contaminants. After undergoing membrane filtration, the clouded 1 2 3
U i powerfully reactive
M appearance of the recycled water is converted into a clear solution that
contains dissolved organic material and salts. molecules like
those used by nature
to clear pollutants from
Enter Exit the atmosphere. These
1 2 3 molecules provide
The Purification Process further disinfection and
destroy any remaining
The City of San Diego currently uses recycled water for irrigation and Reverse Osmosis – contaminants in the
industrial purposes. The Demonstration Project is a pilot study to Barrier 2 water by breaking them
determine the feasibility of further purifying recycled water to supplement down into harmless
local drinking water supplies through reservoir augmentation. The Reverse osmosis is the second and compounds.
project will determine if the purified water meets water quality, safety most essential step in the purification
and regulatory requirements. The purification process uses the multi- process. Water is forced under high San Diego is among many innovative cities
barrier approach of consecutive treatment steps, which work together to pressure through membranes that exploring water purification technology to purify
remove or destroy unwanted materials. Each barrier includes frequent remove salt and microorganisms, wastewater for use as drinking water.
and continuous water quality monitoring. Safeguards are built into the including viruses and bacteria.
Demonstration Project Components T
o
w
n
G e North City Water
e C a
M l
n e gate l
The Advanced Water Purification Facility is one component of the ese n East Reclamation Plant
5 e te
A r
v
Demonstration Project. Additional components include a study of e
San Vicente Reservoir to determine the potential of augmenting Dr A look at the technology behind the
the reservoir with purified water, an economic and energy analysis, Miramar Rd
and defining regulatory requirements. In addition, an independent lla Village Dr
La Jo Water Demonstration
advisory panel of experts provides oversight and guidance. The
purified water will not be added to the San Vicente Reservoir during l Dr Purification Project
the demonstration phase; instead it will be added to the existing Nobe 805
recycled water distribution system. For more information about G
e
the project or to schedule a speakers bureau presentation for your n
e
se
organization, visit www.purewatersd.org. e A
Take a Look ve
You are invited to tour the Advanced Water Purification Facility, the 52
test facility for California’s first indirect potable reuse via reservoir
augmentation pilot project. During the walking tour you will see water To tour the facility, please register at
purification technology up close and compare samples of purified water www.purewatersd.org/tours.shtml or call (619) 533-4631.
produced at the facility to tap and
recycled water — the difference is clear.
Tours are held Tuesdays and Thursdays
and on occasional evenings and Saturdays.
To tour the facility, please register at
www.purewatersd.org/tours.shtml or City of San Diego
call (619) 533-4631. Public Utilities Department
600 B Street, Suite 600 Exploring local resources to ensure
San Diego, CA 92101 a sustainable water supply
Project Information Line: (619) 533-7572
Tasting is Believing Project Speakers Bureau Line: (619) 533-6638
Email: purewatersd@sandiego.gov
Orange County’s Groundwater Replenishment System (GWR) is a full- Website: www.PureWaterSD.org
scale advanced water purification facility located in Fountain Valley,
California. The GWR System uses the same purification process being Water Purification Demonstration Project
examined by the Demonstration Project to supply a safe and reliable @PureWaterSD
water source to over 500,000 residents. As a full-scale facility, guests
touring the GWR System are able to drink the purified water. To register PureWaterSD
for a tour, visit www.GWRSystem.com.
Printed on recycled paper. This information is available in alternative formats upon request. 6/12 LG
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