Wastewater Management
Fig. 1. With control and compliance such important issues, investment in wastewater treatment technology always includes the latest in automation technology.
Compliance drives wastewater treatment interest
Automation is a central issue when it comes to wastewater treatment, especially in terms of control and monitoring, increasing capacity, improving effluent quality, and meeting environmental compliance standards. Sean Ottewell reports.
Automatisierung steht im Mittelpunkt der Abwasseraufbereitung, insbesondere hinsichtlich Steuerung und Überwachung, Kapazitätssteigerung, verbesserte Abwasserqualität und Einhaltung von Umweltvorschriften. Sean Ottewell berichtet.
L’automatisation constitue un thème central pour le traitement des eaux usées, et tout particulièrement en matière de contrôle et de surveillance, d’amélioration des capacités et de la qualité des effluents ainsi que de conformité avec les normes environnementales. Selon Sean Ottewell.
and compliance such important issues, investment in wastewater treatment technology always includes the latest in automation technology (Fig. 1). Utilities Kingston (UK), owned by the City
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of Kingston, Ontario, is an international leader in the wastewater treatment field. The company has just completed a US$103 million (€79 million) expansion of the Ravensview wastewater treatment plant, located on the shores of the St. Lawrence River. The company’s goals for the Ravensview plant
were to increase effluent capacity; to improve effluent, air and water quality; to reduce noise; and to provide superior bio-solids handling, energy savings and efficiency. To achieve this, UK chose a Rockwell Automation PlantPAx Process Automation System solution which included programmable automation controllers (PACs), intelligent motor control centres (MCCs) and variable frequency drives (VFDs), as well as field services including Protection Plus start-up services, factory acceptance testing and TechConnect phone and online support. The Ravensview primary effluent pumps,
ccording to consultants Helmut Kaiser, the world market for water and wastewater treatment is currently worth over US$500 billion (€384 billion). With control
centrifuges, sludge pumps, chain and flight sludge collectors, blowers, compactors and HVAC equipment are now controlled using Allen-Bradley MCCs and VFDs from Rockwell Automation. Allen-Bradley CENTERLINE 2100 MCCs with IntelliCENTER technology package Allen- Bradley soft starters to control process applications. IntelliCENTER software provides site operators remote access, real-time diagnostics such as incoming power, pump performance and efficiency and electronic MCC documentation. Access to this type of information helps UK minimise MCC downtime and improve equipment performance. The Allen-Bradley SMC Flex solid-state motor
control soft starter installed on the blowers provides intelligence, advanced protection, unmatched performance, diagnostics, and communication. It integrates a bypass to minimise heat generation during run time, which automatically closes when the motor reaches its nominal speed, resulting in a cooler running component and compact enclosure. Also integrated into the plant’s system are the Allen-Bradley PowerFlex 70 and 700 AC drives that provide improved process control. These PowerFlex drives provide additional process information from the drive level and automatically disperse it to any part of the plant through the architecture. To measure and provide power-quality reports,
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