Danish Greenfield Water-Treatment Plant

AB Electric was engaged to design and deploy a modern process control solution for a newly constructed, four-site Greenfield water treatment facility in Denmark, with all sites linked to a centralized control room. Water treatment operations in the Energy & Utilities sector demand continuous, reliable process management across geographically distributed infrastructure — any control gaps can compromise water quality compliance or create costly unplanned downtime. Beyond baseline automation, the project brief included a specific mandate for power consumption optimization, reflecting growing regulatory and operational pressure on utilities to reduce energy costs across pumping, aeration, and treatment processes.

AB Electric implemented Rockwell Automation's PlantPAx Distributed Control System (DCS) as the core process automation platform across all four treatment sites. The architecture combined process automation controllers, distributed I/O modules, and Variable-Frequency Drives (VFDs) — all leveraging commercially available, off-the-shelf hardware to reduce procurement complexity and long-term support risk. VFDs were integrated to enable dynamic motor speed control, directly addressing the power optimization requirement by matching pump and blower output to real-time process demand rather than running at fixed speeds. All four sites were unified under a single central control room, giving operators a consolidated view of plant status and enabling coordinated response across the full facility.

The deployment delivered a robust, production-ready process control solution that met the operational and energy objectives set out in the original brief. Key outcomes included:

• Multi-site unification: All four Greenfield sites brought under centralized control room supervision, reducing operator overhead.
• Power optimization: VFD integration enabled demand-matched motor control, directly reducing unnecessary energy consumption across pumping and treatment processes.
• Scalability: The PlantPAx architecture on standard hardware provides a flexible foundation that can accommodate future capacity expansion or additional treatment stages without major re-engineering.

• Standardized hardware reduces lifecycle risk: Building on off-the-shelf components simplifies spares management and lowers long-term maintenance costs in distributed utility environments.
• VFDs are a practical lever for energy reduction: Integrating variable-frequency drives at the control layer can address power optimization requirements without separate energy management systems.
• Greenfield deployments benefit from unified DCS architecture: Starting fresh allows teams to standardize control across all sites from day one, avoiding the integration debt common in brownfield upgrades.
• Scalability should be a design requirement, not an afterthought: Specifying a scalable platform upfront creates reusable templates that accelerate future water industry projects.