Reducing chemicals and costs brings savings to German city’s largest wastewater treatment plant

May 14, 2024

At its largest wastewater treatment plant, Leipziger Wasserwerke, Germany requires a continuous and reliable solid measurement solution for its primary sludge treatment and digested sludge dewatering process. Since 2021, the company has successfully relied on two Valmet Total Solids Measurement (Valmet TS) units, enabling the plant to significantly reduce its operating costs.

Valmet Total Solids Measurement installed at Leipzig Wastewater Plant

With a capacity of 550,000 PE (population equivalent), the Rosental Wastewater Treatment Plant in Leipzig is the German city’s largest. The facility uses mechanical, biological, and chemical means alongside an anaerobic sludge stabilization system to clean its wastewater and has relied heavily on Valmet’s portfolio of wastewater solutions for four years.
Before turning to Valmet, the challenge for the Rosental Wastewater Treatment Plant had been the need for a dependable measurement solution.

Benefits of Valmet TS are above the competition

The Rosental Wastewater Treatment Plant had attempted trials with other companies’ measurement solutions for sludge treatment and dewatering. However, Valmet TS results have proven to be the difference.

“Before acquiring our two Valmet TS units, the measurements and readings we received were often inaccurate,” says Marko Biewald, Operational Engineer at the plant. “It was a situation that was frequently time-consuming and cost us wasted hours as we were unable to optimize our treatment processes.”

Valmet TS is a reliable and accurate real-time measurement solution based on microwave technology for wastewater needs. The two units that the plant currently has installed offer operators a full array of data and instant information needed to control and optimize the operation’s solids treatment process.


Valmet TS installed at the plant


Minimizing costs and processes through reduced chemicals and less pumping

For the Rosental Wastewater Treatment Plan, their staff have seamlessly optimized sludge removal from the clarifier, enabling them to minimize water pumping costs during later stages.

As part of the Valmet Wastewater Measurements portfolio, Valmet TS offers immediate solid measurement solutions for wastewater sludge treatment control and optimization. With decades of experience and expertise in the wastewater industry, Valmet provides proven solutions that are helping municipalities operate their wastewater treatment facilities more sustainably and efficiently.

"With Valmet TS, we've steadily improved the efficiency of sludge treatment," says Biewald. "All the important data we need to optimize our sludge processes is there and available to us in real time, which wasn't the case before."

Leveraging advanced microwave technology and a design free of degradable parts, Valmet TS is the premier choice for total solids measurement in wastewater treatment applications. Its performance remains unaffected by changes in sludge quality or flow rates, ensuring consistently accurate readings through processing high sample volumes combined with rapid data collection.


Rosental Wastewater Treatment Plan


130 years of treatment + 30 years of microwave technology with Valmet TS

In the same year it celebrates its 130th anniversary, the plant has plans to commission a new Valmet TS, which Valmet is working with to deliver.

“We're planning to use the new TS unit to optimize the polymer process at the centrifuge inlet," says Biewald. "And we're very confident it will lead to additional significant cost savings both in the purchase of polymers, and in the transport of sludge. Plus, it will increase the operational reliability of the centrifuge thanks to the early detection of any disturbances.”


Marko Biewald (left) with Martin Merkert (right)


For 30 years, the microwave technology that Valmet TS relies on means there are no moving parts that deteriorate or wear over time. Valmet has been offering this technology and working to support customers like Rosental Wastewater Treatment Plant going into the fourth decade.

"From the very beginning when we partnered with them, the Valmet staff has demonstrated genuine know-how and expertise while eagerly finding ways to ensure the measurement processes met our expectations,” says Biewald. “They continuously provide us with updates regarding new developments and share new potential enhancements, so we're optimistic about collaborating with them on our centrifuge’s process optimization moving forward."


Want to learn more about Valmet TS or our full wastewater portfolio?

Martin Merkert
Area Sales Manager Wastewater
Germany & Switzerland
Tel: +49 173 6343 635
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