Assessment of u s corps aerators in the san joaquin river for the port of stockton
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Assessment of U.S. Corps Aerators in the San Joaquin River for the Port of Stockton PowerPoint PPT Presentation


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Assessment of U.S. Corps Aerators in the San Joaquin River for the Port of Stockton. September 2004 Jones & Stokes Russ Brown, Tom Trexler, Megan Robinson. Goals/Objectives. Determine the current level of performance of both aerators

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Assessment of U.S. Corps Aerators in the San Joaquin River for the Port of Stockton

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Assessment of U.S. Corps Aerators in the San Joaquin River for the Port of Stockton

September 2004

Jones & Stokes

Russ Brown, Tom Trexler, Megan Robinson


Goals/Objectives

  • Determine the current level of performance of both aerators

  • Estimate the oxygen loads from the aerators and the oxygen transfer efficiency

  • Compare aerator performance to release of oxygen gas from jets and different aerator device (Biox Hose)


View of Aerator Dock


Measurement Efforts

  • Measurements in Front of North Jets while Operating Both Aerators

  • Measurements in Front of South Jets while using Oxygen Gas


Measurements and Estimations

  • Measured Velocity and DO concentrations of upwelling and/or flow-away currents

  • Estimated flow-away or upwelling width and calculated flows

  • Estimated Oxygen Loads from upwelling or flow-away flows and DO pick-up (measured DO minus background DO)


Operation of Both Aerators


Operation of South Jets with Pure Oxygen Gas


Both Aerators

DO Pick-up of 0.78 mg/l (Back. DO = 3.2 mg/l)

Total Flow-away Flow of 90 cfs

Total Oxygen Supply Rate of 402 lbs/day (assuming 40 ft flow-away width)

South Jets with Oxygen

DO Pick-up of 2.19 mg/l (Back. DO = 2.9 mg/l)

Avg. Upwelling Flow of 191 cfs

Avg. Oxygen Supply Rate of 2270 lbs/day

Oxygen Transfer Efficiency of 45%

Summary


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