Intermittent On/Off Aeration
- Determination of Denitrification Rate
- Effluent Quality of Ashland WWTP Before and After On/Off Intermittent Aeration
- Denitrification Efficiency of Intermittent On/Off Aeration
- A 24 hour cycling monitoring
- A pilot test of effluent water-level control technology
- Cost Saving
- Summary
- Table of Figures
- Table of Tables
Biological Phosphorus Removal Design
- Characterization for Evaluation
- Potential Test
- Demonstration of Intermittent On/Off Aeration
- Biological Nutrient Removal Theory and Design
- Design of Biological Nutrient Removal Processes
- ENBIR computer-design program
Demonstration of Intermitttent On/Off Aeration at a Municipal Wastewater Treatment Plant for Denitrification and Energy Savings
Final Report
Summary
- The intermittent on/off aeration did not affect the effluent BOD5 and TSS concentration. The sludge settleabllity was also not affected. As a result, electricity cost for aeration could be reduced by approximately 30% by shutting off the jet aerators for 8 hours every day in the Ashland WWTP.
- By shutting off the jet aerators for 8 hours, nitrate concentrations were below 5 mg-N/L, compared with to 25 mg-N/L without intermittent on/off aeration.
- Biological phosphorus removal to 1 mg/L was not achieved by the intermittent on/off aeration even though PAOs seem to be developed in the ditch. More work needs to be done to investigate the PAO existence and its behavior in the activated sludge with an intermittent aeration.
More information on this topic: Gerry Novotny
Last Revised: Wednesday July 26 2006
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