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Water / Wastewater

Clean water with a minimum of energy !

Speed control can bring considerable energy savings in water/wastewater operations due to the great variations in demand. Municipalities around the world use CG Drives & Automation products to optimize processes in sewage treatment, water purification plants and pumping stations. The result is improved reliability, reduced energy consumption and less mechanical wear.

Efficient electric motor operations

Our AC drives and softstarters are developed for applications such as pumps, blowers, mixers, scrapers and centrifuges. Robust construction means they can be located close to the controlled equipment. A built-in load monitor protects the process from damage and downtime, if a pump is running dry, a pipe is blocked, a mixer blade is broken or a scraper is jammed. Linear stops prevent water hammer in your pump systems and extend equipment lifetime.

Constant flow despite varying demand

Keeping a constant flow despite the large variation in load is handled efficiently by controlling the electric motors with our AC drives. Operation is continuously adapted to demand, saving energy as well as maintenance. In addition, customers get more consistent water pressure in their pipes. Oxygenating stands for a large part of energy consumption in treatment plants. Our AC drives ensure that blowers supply the right quantity of air in at the right time, maintaining the right oxygen level with a minimum of energy.

Dewatering with energy-efficient centrifuges
We also offer energy-efficient operation of decanter centrifuges used for dewatering sludge. The process uses two electric motors, one that powers the drum and one that brakes the screw conveyor. Energy generated from braking is normally converted into heat and dissipated via brake resistors. With our solution the energy is re-used instead, by feeding the braking motor’s energy directly to the driving motor. The requirement for energy from the mains is reduced and the cost of brake resistors is saved.

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