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Common Sense Approach to Upgrade of SCADA Systems at Three Large Wastewater Treatment Plants

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The Ocean County Utilities Authority (Authority) serves a population of approximately 600,000 people in Ocean County and Southern Monmouth County, New Jersey. As a result of the creation of the Authority, 46 primary treatment plants were consolidated into three large wastewater treatment plants ranging in size from 20 mgd to 32 mgd. The plants are the Northern Water Pollution Control Facility (NWPCF), the Central Water Pollution Control Facility (CWPCF) and the Southern Water Pollution Control Facility (SWPCF). In 2008 the combined average daily flow for all three plants was 51 mgd.

Recreation and tourism in Ocean County contributes on an annual basis 2 bil to 3 bil to the local economy. With a need to remain competitive and with great concern for the receiving waters and their impact to the environment, the Authority realized that process control systems represent a key technological investment; and made a decision to replace the existing systems with new “best-available-technology” in the mid-1970s, each treatment plant received a different manufacturer's “hardwired” centralized control systems. Throughout the years there have been many process improvement projects that resulted in the installation of a wide assortment of programmable logic controllers (PLCs). These PLCs have resulted in “islands-of-automation”.

Keywords: Operations Optimization; Process Control and Instrumentation; SCADA

Document Type: Research Article


Publication date: 2009-01-01

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