HomeMy WebLinkAbout97.Item 5 PPP 12-12-18 Admin Committee - Odor and Corrosion Control AN
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Odor and Corrosion Contro
r,. Umesh Murthy, Engineering Supervisor
-�A, December 12, 2018
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Agenda
• Odor generation at service areas and plants
• Relationship between odor and corrosion
• Odor control tools/ methods
• Levels of service
Collections Systems
�Odor : 1 Odor :
Corrosion 40
Alanholes
Alanholes
Air Release
Valve
Corrosion
Rising Mains
Pump Statio 11000dor :
Corrosion
Pressure Point Gravity Sewers
. . . . . . . . . . . . . . . . . . . . . . . . . Sewage Treatment Plant
Air Jumper -
Treatment Plants
1„ : 1„ : 1„
1„ :
W GWRS Ocean
Headworks - ;
55�5�e Primary Clarifiers Aeration Basins
Gt1p� Clean Air Clarifiers
Cp1e
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Return Activated Sludge
Caustic ,
Dosing lot oil
Mg(OH)2
Ca(NO3)2 Blogas H,S
Iron Salts
Solids Flow
Water Flow
Biosolids to Disposal
Thickeners
Dewatering
Digesters
Odor and C
f I C, > Corrosion
_- Location of H 2 S
T , Oxidizing Bacteria
AIR
Wastewater
Sulfate + Bacteria + NO - Oxygen = HZS
Slime Layer
F Settled Solids
Sulfide Transformation in a Gravity Sewer
Odorants Detected at OCSD
Odorant Odor Description
Rotten Eggs
Rotten Vegetable (Cabbage)
Marshy / Swampy
Sulfur Based Canned Corn
Skunk
Garlicy
Burnt Rubber
Coffee Grounds
Ammonia
Nitrogen Based Cat Urine
Fishy
Fecal
Whyr dor Control ?.
• Quality of life - Odor is a nuisance/ unpleasant
(complaints )
• In some cases odors may be a health hazard ( risk to
employees )
• Odorous compounds can cause corrosion ( asset
preservation )
• SCAQMD compliance
How do we control odor and
corrosion '.?
* Planning , design , and construction of CIP projects
* Best management practices
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36 Caustic Slug Dosed Manholes U A E Bioscrubber
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Chemical Tanks:
Ferrous Chloride (6) Y RES VILLA
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Calcium Nitrate (4) OS
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Magnesium Hydroxide (3) d Tiffany PS
Continuously-Dosed Sewer Segments:
WESTMINIST
Sunflower �SeahBeach �� Midway City
Baker-Main (Airbase) PUmp{Station Sanitary DIStrICtsAN
Knott Interceptor oUN N TINccr—nn
Miller-Holder ALL
HUNTINGTON Main St
Newport BE Pump Station
COSTA IRVINE
Non-Dosed OCSD Sewer MESA
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NEWPOR-- Michelson
e BEACH WWTP
Bay Bridge N
Pump Station
Crystal Cove Ak
Pump Station
Odor -Control Methods Tools
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CypressBatch Dosing StationBioscrubber
Critical - ewer Manhole Inserts
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Polymeric - amine
H2S is turned into a stable Biological - Wood Chip
liquid polymer.
Nasal Ranger/Odor Boss Mobile Platform
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REACTORS =
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Odor Control Tools ( Cont .
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NOR- Remote monitorinq and control
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Your computer
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RTX Gas Log
Optical Gas Imaging Camera for
Detecting Fugitive Emissions
Digester sight Gas Detection
glass leak Camera
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Total OCSD Attributable Odor Complaints
100 96
90
80
70
60 55 55 55
50 46
40
30
20 14
10
10 ■
2012 2013 2014 2015 2016 2017 2018
FY 17 = 18 Strategic goals
L -Affink— - -
LLLiL L Agency Strategic Goals ( Levels of Service)
FY 17-18 LOS
Providing Exceptional Customer Service Year End
Results Target
1 . Odor Control - - Providing reliable, responsive and affordable services in line with customer needs and expectations
Treatment plants odor complaint response within 1 hour. 100% 100%
Collection system odor complaint response within 1 working day. 100% 100%
Number of odor complaints: (Under normal operating conditions)
• Reclamation Plant No. 1 1 0
• Treatment Plant No. 2 2 0
• Collection System 8 12
Thank
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