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HomeMy WebLinkAbout96.PPP Phase 3 Overview_MillerCa r o l l o T e m p l a t e W a t e r W a v e . p p t x Overview of Chino Desalters Phase 3 Expansion Project Presenter: Cindy Miller, P.E., Program Manager Chino Desalters Phase 3 Expansion Project Ca r o l l o T e m p l a t e W a t e r W a v e . p p t x 2 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 Ca r o l l o T e m p l a t e W a t e r W a v e . p p t x 3 Chino Basin Desalter Authority (CDA) Ca r o l l o T e m p l a t e W a t e r W a v e . p p t x 4 •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 Ca r o l l o T e m p l a t e W a t e r W a v e . p p t x 5 •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 Ca r o l l o T e m p l a t e W a t e r W a v e . p p t x 6 •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 Ca r o l l o T e m p l a t e W a t e r W a v e . p p t x 7 •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 Ca r o l l o T e m p l a t e W a t e r W a v e . p p t x 8 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 Ca r o l l o T e m p l a t e W a t e r W a v e . p p t x 9 Chino II Desalter Operation Without CRF Expanded brine volume of 2.68-mgd exceeds current brine line capacity of 1.62-mgd. Ca r o l l o T e m p l a t e W a t e r W a v e . p p t x 10 Chino II Desalter Operation With CRF A large portion of solid residuals have beneficial use value. Ca r o l l o T e m p l a t e W a t e r W a v e . p p t x 11 CRF Process Flow Diagram Ca r o l l o T e m p l a t e W a t e r W a v e . p p t x 12 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 Ca r o l l o T e m p l a t e W a t e r W a v e . p p t x 13 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 Ca r o l l o T e m p l a t e W a t e r W a v e . p p t x 14 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 Ca r o l l o T e m p l a t e W a t e r W a v e . p p t x 15 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 Ca r o l l o T e m p l a t e W a t e r W a v e . p p t x 16 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 Ca r o l l o T e m p l a t e W a t e r W a v e . p p t x 17 Ca r o l l o T e m p l a t e W a t e r W a v e . p p t x 18 Ca r o l l o T e m p l a t e W a t e r W a v e . p p t x 19 Any Questions?