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Water/Waste WaterSince 1996, the Waterford Township Department of Public Works (DPW) has used Opto 22 hardware and software in its water treatment plants, sewer pumping stations and other facilities. Serving a community of more than 74,000 people, the Waterford DPW has utilized Opto 22 to provide the automation and control systems needed to pump and treat water from 15 wells and 10 water treatment plants into its’ 350 mile distribution system. It is also used to monitor and control 62 sewer pumping stations. The water treatment plants are designed to remove iron and manganese, which are both secondary contaminants and to inject chlorine for disinfection and orthophosphate for corrosion control. The DPW is using the Opto 22 SNAP PAC System to monitor and control its’ latest water treatment facility, which utilizes a biological iron removal process and pressure filters. As with the other 9 water treatment plants in the system, the DPW chose to install Opto 22 SNAPPAC controls instead of using the “black box”-type control system typically supplied by the filter manufacturers. The DPW is able to program any type of control scenario they wish resulting in a finely tuned system. SNAP PACs and PAC Control programming software provides the DPW with the flexibility to program using flowcharts, which are a lot easier for everyone involved to use and understand. SNAP PAC systems also prove invaluable for the DPW because of the very high number of I/O points involved in their applications. On older systems, the DPW uses Opto 22’s mistic I/O systems, which feature mostly single-channel modules, but the higher density SNAP PAC line is now preferred because it boasts 4-channel (and even higher density 32-channel) analog I/O modules that can be used to take chlorine, pH, and other readings from the treated water. The DPW understands that higher density modules save cabinet space, which saves a lot of money in I/O racks and cabinetry. According to Terry Biederman, the Waterford Township DPW Director, “With Opto 22, there’s a continuing evolution of the I/O and it just makes good sense to take advantage of the features, functionality, and cost-savings the company’s latest technologies provide.” |
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