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Title: Schofield Barracks Wastewater Treatment Plant Process Control Program: Quarterly Progress Report No. 1 
Author: Lam, Collins.; Lopez, G Dennis.; Murakami, Cey.; Lin, Qing.; Lin, Ann Bin.; Babcock, Roger
Date: 1996-07
Publisher: Water Resources Research Center, University of Hawaii at Manoa
Citation: Lam C, Lopez GD, Murakami C, Lin Q, Lin AB, Babcock R. 1996. Schofield Barracks wastewater treatment plant process control program: quarterly progress report no. 1. Honolulu (HI): Water Resources Research Center, University of Hawaii at Manoa. WRRC unedited report, 1996-09.
Abstract: The overall objectives of this project are to evaluate operations, make recommendations, and train personnel at the Schofield Barracks Wastewater Treatment Plant (SVWWTP) for the purpose of improving the operating efficiency of the plant. The main tasks associated with this study are as follows:

1. Implement a process monitoring program (including sample collection and analysis) for liquid stream, solids stream and generated side streams in order to characterize all process streams and determine efficiencies and deficiencies.
2. Determine projected treatment capacities of each process area under existing conditions and with potential improvements.
3. Identify and develop process control strategies for each process area and incorporate into a facility process control strategy manual.
4. Provide technical guidance and training to the operations and support personnel for the treatment facility as requested by and in cooperation with the Army.
5. Review and update the facility Operations and Maintenance (O&M) Manual as required to improve its usefulness to operations personnel.

This first quarterly progress report contains a brief summary of the more important findings obtained thus far as well as descriptions of in-progress efforts. To date, considerable effort has been expended toward task (1) above through collection and analysis of samples from the SBWWTP. Efforts have begun on tasks 2, 3, 4, and 5. The only current progress impediment is in regard to the need for accurate data from all plant flow meters. Currently, many of the flow meters provide questionable values and are in serious need of calibration. We cannot complete the determination of projected treatment capacities or recommended process control strategies without accurate flow data.

The extensive data collection that we have initiated has enabled us to get a reasonable picture of how the SBWWTP performs under existing conditions and to begin determining process efficiencies/deficiencies (Task 2, above). The data indicate some flow splitting problems (primary clarifiers and secondary clarifiers), and a solids process stream limitation. The data also indicate that the primary clarifiers function relatively well, that the activated sludge process functions well and achieves complete nitrification despite a fairly serious bulking problem, that there may be a problem with how effluent biochemical oxygen demand (BOD5) samples are analyzed, that the anaerobic digester is not achieving acceptable solids stabilization, and that the centrifuge is not achieving optimum sludge dewatering. All of these identified issues are being addressed as in-progress effort.

Currently, the SBWWTP is considered to be a Class III treatment plant by the State of Hawaii. This classification was determined in 1980. A current assessment by us determined that the plant should probably be considered a Class IV facility. Estimates of staffing requirements based upon an Environmental Protection Agency procedure found that at least ten personnel are needed at the treatment plant (one supervisor, five operators, two maintenance, one laboratory, and one yardworker).
Series/Report No.: WRRC Unedited Reports.
1996-09.
Quarterly Progress Report
Pages/Duration: v + 69 pages
URI: http://hdl.handle.net/10125/21930

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