HomeMy WebLinkAbout96.PPP Phase 3 Overview_MillerCa
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Overview of Chino Desalters Phase 3
Expansion Project
Presenter:
Cindy Miller, P.E., Program Manager
Chino Desalters Phase 3 Expansion Project
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Project Background
•Chino Basin Desalter Authority
(CDA) is a Joint Powers Authority
consisting of 8 members
•The CDA owns the Chino
Desalters (I and II)
•Chino II Desalter began operation
in 2006 (10-mgd)
•Expanded to 20.5-mgd in 2011
•Brine disposal costs, coupled with
construction-related grant funding,
prompted the CDA to move forward
with brine reduction process
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Chino Basin Desalter Authority (CDA)
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•Groundwater Production: 29,000 AF/Year
–22 Wells
•Treated Water: 24,600 AF/Year
•Two Desalters (22 mgd capacity):
–Chino I –Constructed by SAWPA (2000):
•Reverse Osmosis/Ion Exchange/Air Stripping
•Operated by IEUA (contract w/CDA)
–Chino II (2006):
•Reverse Osmosis/Ion Exchange
•Operated by Jurupa CSD (contract w/CDA)
CDA -Existing Operation
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•Brine Disposal: SAWPA Inland Empire Brine Line (IEBL)
•Exports ~ 23,000 tons of salt annually from Chino Basin
•Chino I: One connection to Brine Line
–2 million gallons per day (mgd)
–TDS: 6,000 mg/l
•Chino II: Two connections to Brine Line
–1.2 million gallons per day (mgd)
–TDS (RO Brine): 3,000 mg/l
–TDS (IX Brine): 14,000 mg/l
CDA -Existing Operation
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•Brine Line charges are second largest component of
O&M budget (behind electricity)
•Feasible Brine Line Alternatives: None
–Unable to send brine to upstream wastewater plants
–Trucking Option: Chino I would require 400 trucks per day
–Trucking Option: Chino II would require 240 trucks per day
The Brine Line is a critical element for the operation of
the Desalters.
CDA -Existing Operation
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•Investment of $140 Million
•Sponsor Agencies: Ontario, Jurupa CSD, Western MWD
•Increase Groundwater Production to 40,000 AF/Year
•Increase Treated Water to 35,200 AF/Year
•Eight new wells
•Expected Completion in Fall 2015
•Innovative Brine Treatment –Concentrate Reduction
Facility (CRF)
CDA –Phase 3 Expansion Project
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Concentrate Reduction Facility (CRF) Goals
Sustainability
•Create beneficial byproduct
•Reduce basin water exports
•Reduce impacts to brine line
Water Supply •Provide additional potable supply
•Reduce groundwater pumping
•Find a cost effective option
•Utilize grant funding
•Offset O&M costs with product
Cost
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Chino II Desalter Operation Without CRF
Expanded brine volume of 2.68-mgd exceeds
current brine line capacity of 1.62-mgd.
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Chino II Desalter Operation With CRF
A large portion of solid residuals have beneficial
use value.
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CRF Process Flow Diagram
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Existing Chino II RO recovery is limited by hardness and silica concentrations
Flow Stream Chino II
Concentrate
CRF Secondary
RO Feed
Ca2+(mg/L)679 7
Mg2+(mg/L)102 4
Alkalinity (mg/L as CaCO3)1,145 302
Ca Hardness (mg/L as CaCO3)1,697 17
Mg Hardness (mg/L as CaCO3)420 16
Total Hardness (mg/L as CaCO3)2,116 33
TDS (mg/L)3,319 2,718
Si (mg/L)194.3 74.8
pH 7.61 9.47
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Chemical softening removes scaling
precursors in the primary RO concentrate
Secondary RO recovery of
66% (and higher)
achieved through:
–Calcium reduction
–Magnesium reduction
–Alkalinity reduction
–Silica reduction
CHINO CRF TREATMENT
GOALS
Silica Calcium
180 mg/L 1,700 mg/L
<80 mg/L <40 mg/L
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Pellet reactors were selected as the
primary chemical softening configuration
•Basics
–Upflow, fluidized bed
–Lime and/or caustic is injected at
bottom of bed
–Seed (sand or CaCO3) introduced
to provide crystal growth sites
–Pellet blowdown frequency
determines size
•Benefits
–High rate (small footprint)
–Easily dewatered residuals
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Dried pellets have marketable value and
are easier to store and transport
•Pellets are value-added products
–Industrial applications: concrete block
manufacturers, specialty mineral
suppliers
•Convert waste stream to usable
commodity
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Project Status
•Project Bid in 2013
•Low bid: ~$46 million
•Project awarded in August 2013
•Value Engineering
•Estimated project completion end of
2015
•Currently under construction
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Any Questions?