Upgrade of a High Purity Oxygen Plant for Improved Energy Efficiency and Process Control
Post Point Wastewater Treatment PlantBellingham, Washington
The paper describes an approach to design and control of high purity oxygen (HPO) activated sludge treatment systems incorporating anaerobic zones for settleability control, efficient oxygen transfer, and control of dissolved oxygen concentration through variable speed drives. A case study from an upgrade project in Bellingham, Washington is used as an example of the approach. Results from upgrade of the Post Point WWTP provide proof that significant improvements can be made in the process control and energy efficiency of HPO plants. Improvements to sludge settleability can result from conversion from fully aerobic to anaerobic selector operation. Continuing improvements in oxygen transfer can make upgrade of impellers economical. Provision of variable speed drives reduces waste of DO, drive power, and HPO gas. Source: WEFTEC 2009 Proceedings
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Posted: August 27th, 2010 | Filed under: Waste Water Treatment | Tags: Energy Savings, Improved Oxygen Transfer, Improved Plant Efficiency, Improved Sludge Settleability, Reduced Loss of DO in the Effluent | No Comments »