HomeMy WebLinkAboutItem 6_7 PPP 05-01-2019 Operations Meeting - Iron Chemical s L
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• Coagulant of choice for WWT applications due to its high efficiency and
effectiveness in clarifying and reducing suspended solids
• Reacts with sulfates to prevent the formation hydrogen sulfide odors
Cost
• $600-750 per dry ton ($25-31 per 1 ,000 gal) - �---
x 7,077 dry tons = $4.2-5.3M
Alternatives — None as effective, some create additional sludge
• Aluminum Sulfate, Aluminum Chloride and Sodium Aluminate •
• Ferrous Chloride, Ferric/Ferrous Sulfate
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Ferr'ic Chlor'ide Commerc 'ial
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Cons 'iderat'l
• Ferric is a specialty chemical with a limited number of suppliers
• In the past there have been industry consolidations (single supplier)
and price spikes .
• Vendors require a significant supply chain/infrastructure to
make/purchase and transport the product.
• The District has adopted a policy to support multiple vendors to
maintain competition in the market. This is the basis for
recommending two contracts to supply the same chemical .
Regional
HABRA Pacific Quality Partners
(PQP) Brea
Yorba Linda
FULLERTON YORBA LIND- Odor Control Station
Hager-Pacific PLA TIA (Siphon Treatment)
36 Caustic SlugDosed Manholes Buena Park ❑ Bioscrubber
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9 Chemical Dosing Stations L ANAHEIM
Chemical Tanks: L: VILLA
Ferrous Chloride (6) Y RES PARK
TA N T N r-
�_j Calcium Nitrate (4) Los GARDtN
A AMITOS GGSD GRO E ORANGE
Magnesium Hydroxide (3)
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Continuously-Dosed Sewer Segments: ll
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Sunflower SeahBeach " Midway City LA
Baker-Main (Airbase) Pu On mp{Stati Sanitary DistrictSAN
AN
Knott Interceptor OLIN N TINS;
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Miller-Holder Main St
Newport HUNTINGTON
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p BE Pump Station
COSTA IRVINE
Non-Dosed OCSD Sewer MESA
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NEWPOR"1 Michelson
V ® ACH WWTP
Bay Bridge N
Pump Station
Crystal Cove Ak
Pump Station
Ca(' NO3)2
Collect '10
1 calcium 6 oxygens 'aw*
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• Ferrous chloride — oxidize and/or precipitate dissolved sulfide .
• Sodium hydroxide — deactivating/inhibiting the slime layer.
• Calcium nitrate — prevent the formation of sulfides
• Magnesium hydroxide — adjustment of pH , suppress odors
Ferrous Chloride Solution 34%
Sodium Hydroxide Solution
Calcium Nitrate Solution 60%
1 Magnesium Hydroxide 60%
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Recommendatii-IF,
• Staff recommend the continued use of ferric chloride and ferrous
chloride for odor control and enhanced settling of sludge.
• Staff recommend the award of two agreements for ferric chloride
purchase to support market competition and resilient supply.
• Staff recommend the approval of ferrous chloride contingency
increases due to changes in market conditions.