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Emerson Process Management has completed a WDPF-to-Ovation control system migration project at the West Basin Municipal Water District’s Edward C Little Water Recycling Facility (ECLWRF).

The facility, located in El Segundo, California, treats secondary effluent conveyed via the district’s Hyperion Secondary Effluent Pump Station at the Hyperion Wastewater Treatment Facility.

Through advanced purification technologies – including microfiltration, reverse osmosis and ultraviolet light and peroxide treatment – the ECLWRF makes five different qualities of ‘designer’ water.

Use of this water ranges from irrigation to ultra-pure water for high- and low-pressure boiler feeders and cooling towers, as well as recycled water that supplies the area’s seawater intrusion barrier.

Providing more than 30 million gallons of recycled water throughout the South Bay everyday, West Basin replaces enough drinking water to supply 60,000 households annually.

The project, in which Emerson’s previous-generation control technology was migrated to the Ovation expert control system, supports a plant expansion – the fifth expansion since the facility was built in 1994 – that is necessary to meet the needs of the region.

Emerson worked with West Basin, as well as its onsite construction management contractor, to successfully complete the project.

The Ovation expert control system now monitors and controls microfiltration processes at the ECLWRF as well as three satellite facilities: a nitrification plant that treats Title 22 effluent from the ECLWRF and distributes it to a refinery for use in its cooling towers; a facility that treats Title 22 effluent from the ECLWRF, using it for low- and high-pressure boiler feeds and cooling tower processes at another refinery; and a regional water recycling facility that treats Title 22 effluent from the ECLWRF and transmits it for use at a third refinery.

For this migration project, Emerson supplied a total of 17 Ovation controllers and 19 workstations.

Separate Ovation highways at each site are networked together, enabling operators to monitor and control processes at the satellite facilities from a central location – the ECLWRF – resulting in enhanced efficiency.

In all, the Ovation systems manage nearly 20,000 input/output (I/O) points.

The project was executed in phases, ensuring that there was no disruption in plant operation and service to the district’s municipal, commercial and industrial customers.

Emerson’s Ovation system allows a straightforward migration path for users of its previous-generation WDPF system.

This economical alternative to complete system replacement offers WDPF customers the latest technology while allowing them to retain much of their existing control system investment, including control logic, graphics, I/O cards, field cabling and terminations.

Don Zylstra, senior water resources engineer for the West Basin Municipal Water District, said: ‘We were looking for a robust control solution that could accommodate not only a plant of this capacity, but also the complexity of producing five customised water types.

‘Not only has the new Ovation system greatly increased the number of available I/O points, it has also improved the communication and visibility of plant processes taking place at satellite facilities,’ he said.

Zylstra added that West Basin’s ability to keep some of its existing investment in Emerson’s previous-generation control technology was another major factor in the district’s decision.

Emerson Process Management

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