september 23, 2004 san joaquin river deep water ship channel aeration feasibility study san joaquin...
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September 23, 2004San Joaquin River Deep Water Ship Channel
Aeration Feasibility Study
San Joaquin RiverDeep Water Ship Channel
Aeration Feasibility Study
September 23, 2004
September 23, 2004San Joaquin River Deep Water Ship Channel
Aeration Feasibility Study
Keep in Mind
1) How much O2 should be delivered during the demonstration project
2) How many devices do we test
3) Where should the device be located
September 23, 2004San Joaquin River Deep Water Ship Channel
Aeration Feasibility Study
Additional Issues to Consider
Aeration will probably not be the soul solution to the DO impairment
Operational and efficacy issues for any aeration device need to be resolved
Effects of aeration on the San Joaquin River and Delta ecology need to be better understood
September 23, 2004San Joaquin River Deep Water Ship Channel
Aeration Feasibility Study
Framing the Problem in the Feasibility Study
• DO Objective• Measured DO• DO Deficit
- 10,000 lbs/day O2
September 23, 2004San Joaquin River Deep Water Ship Channel
Aeration Feasibility Study
Mixing Characteristics• Tidal excursion past Rough
& Ready Island is about 2,500 af in one tidal cycle
• Longitudinal distance is about 6,800 feet
• Full mixing across the channel occurs in one day (two tidal cycles)
September 23, 2004San Joaquin River Deep Water Ship Channel
Aeration Feasibility Study
Aeration Devices Studied• Can deliver
10,000 lbs/day O2
• Best suited for deeperwater bodies
• Least flexible delivery rates
• Highest cost per poundof O2 delivered- High construction cost- Potentially high O&M cost
September 23, 2004San Joaquin River Deep Water Ship Channel
Aeration Feasibility Study
Aeration Devices Studied• Can deliver
10,000 lbs/day O2
• Used extensively• Simplistic• Lowest cost per pound
of O2 delivered- lowest construction cost- highest O&M cost
September 23, 2004San Joaquin River Deep Water Ship Channel
Aeration Feasibility Study
O2 TransferPerformance
Operation Parameters
Physical Parameters
Configuration Parameters
Oxygen FeedRate
Hose Length
Hose Depth
“Driving Force”
Initial Concentration
Saturation Conc
September 23, 2004San Joaquin River Deep Water Ship Channel
Aeration Feasibility Study
Aeration Devices Studied• Can deliver
10,000 lbs/day O2
• Most efficient O2 transfer• Flexible• Higher cost per pound
of O2 delivered- Higher construction cost- Lowest O&M cost
September 23, 2004San Joaquin River Deep Water Ship Channel
Aeration Feasibility Study
O2 TransferPerformance
Operation Parameters
Physical Parameters
Configuration Parameters
O2 H2OG/L
Bubble Size
Tube Diameter
Tube Length
“Driving Force”
Initial Concentration
Saturation Conc
September 23, 2004San Joaquin River Deep Water Ship Channel
Aeration Feasibility Study
Recommendations
Construct two pilot scale aeration devices and test in-situ (two year timeframe)• Bubble plume aeration BP• U-tube aeration systemUT
Devices need to deliver at least 2,500 lbs/day O2
Support science to develop trigger for activating and deactivating the aerator
September 23, 2004San Joaquin River Deep Water Ship Channel
Aeration Feasibility Study
Pilot Considerations
Efficiency Fouling Deterioration Operation &
Maintenance
Efficiency G/L Ratio Velocity Initial Bubble Size
Bubble Plume U-Tube
September 23, 2004San Joaquin River Deep Water Ship Channel
Aeration Feasibility Study
Demonstration Project Schedule
ID
1
2
3
4
5
6
7
Finalize Design Criteria
10/12Develop specifications
11/9Review specifications
11/23Develop Bid Package
12/14Bid/Award/Contracting
3/8Construct
5/31
Aug '04 Sep '04 Oct '04 Nov '04 Dec '04 Jan '05 Feb '05 Mar '05 Apr '05 May '05 Jun '05 Jul '05 Aug '05 Sep '05 Oct '05