Cleaning Lamella settlers the easy way for better performance

Lamella settlement tanks are a compact and simple solution that can enhance water treatment processes within a minimal footprint. To maximize their efficiency, the plates inside the tanks need to be regularly cleaned, and a manual process using pressurized water poses several challenges in terms of operator safety and effectiveness. In response, Nordic Water has developed an automated robot cleaner that ensures this task is completed frequently and safely.

As part of a continuous improvement program, Nordic Water, a Sulzer brand, has made several upgrades to its range of Lamella separators, including the introduction of the CleanBot. Designed to offer an automated cleaning solution for the LPS inclined plate separators, the CleanBot ensures optimum efficiency and performance of sludge settlement.

Improving cleaning processes

Within both water and wastewater treatment plants, Lamella settlement processes are used to remove solids from the water stream. The increased surface area of the Lamella plates enables this process to be achieved in a small footprint, making the tanks ideal for increasing treatment capacity without the need for huge areas of land.

Conventional cleaning procedures for the plate packs include manual spraying with a water hose, using a built-in water spray system. In all these scenarios, the water levels in the settlement tank must be lowered to ensure efficient cleaning. Each option poses its own challenges, but all need the process to be halted while the cleaning is conducted.

Nordic Water’s CleanBot has the solution: an automated process that is completed during normal tank operation, maximizing process efficiency and maintaining personnel safety. The robot resides in a charging station before it is deployed on a pre-timed basis to mechanically clean the plates.

Automation delivers efficiency

The robot is positioned on the rails above the Lamella plates before it lowers the cleaning head between the plates and removes all the solids that has been deposited. After one set of plates has been cleaned, the robot is moved to the next row, and the process continues until all the plate assemblies have been cleaned.

The interval between each cleaning operation can be adjusted as required depending on the application. Trials of the robot have been completed over the last 12 months and now the fully automatic version has been launched to support operators of the LPS tanks and improve their efficiency.

The charging station also houses the control panel and a lifting mechanism to transfer the CleanBot onto the plate rails. If the CleanBot needs to recharge, it returns to the charging station before completing its task.

Niklas Windahl, Product Manager for Nordic Water, comments: “The CleanBot can be retrofitted to existing LPS equipment and enables enhanced performance without the need for pumps or compressed air. Its automatic operation can also allow the sludge separation process to continue uninterrupted and as efficiently as possible with the tank kept in operation.”

Learn more about the Lamella with CleanBot


Nordic Water, a Sulzer brand, is announcing the release of its latest annual corporate sustainability report. This provides a transparent overview of the company’s progress in advancing its environmental, social and governance (ESG) strategies.

Nordic Water’s 2021 Sustainability Report, available here, details the company’s approach to providing equitable and adequate access to water, which is inseparable from the brand’s operational success.

The report maps broader achievements in lowering the environmental impact of the business, its operations as well as the entire value chain, including suppliers and customers. To this end, the report collects the relevant benchmarking data on three key areas – People, Planet and Profit – and presents the results from the 2021 Materiality Assessment. A key highlight from 2021 includes the transition to using exclusively low-carbon energy across all Nordic Water’s facilities.

Sadaf Saremi, Sustainability Manager at Nordic Water, comments: “Sustainability is in our DNA and we believe we can contribute globally to creating an equitable and eco-conscious world. Our annual sustainability report represents a cornerstone of our commitment to drive positive change and transparency across the entire value chain and the wider community. We are fortunate to be working with a team of highly motivated employees, stakeholders and partners that share a common vision. Thanks to this group, we were able to make substantial progress and achievements in 2021 and I am sure we will celebrate the realization of our ambitious 2024 and 2040 climate goals”

Learn more about Nordic Water’s Sustainability Report


With the completion of the acquisition of Nordic Water, Sulzer has expanded its offering to the water treatment sector. The deal benefits the customers of both companies and offers a wider range of expertise as well as products to the global market. The synergy between the two companies presents a unique opportunity for these well-respected suppliers to widen the availability of their solutions for more sustainable water treatment processes. 

Nordic Water is a leading supplier of screening, sedimentation and filtration equipment to municipal and industrial water treatment plants. With 60 years’ experience in the industry, the company has a large installed base of equipment that will continue to receive industry-leading support as always.

For Sulzer, the deal is an excellent match for the company’s existing portfolio of pumping, mixing, aeration and solids reducing/removal solutions that offer reliability and efficiency to water and wastewater handling applications. Coupled with Sulzer’s global presence and involvement with water treatment projects around the world, the acquisition enables a greater appreciation for Nordic Water products and the improved sustainability they offer.

Jonas Gunnarsson, CEO, Nordic Water, explains: “Our joint history of supporting the water industry and the complementary nature of our businesses will allow us to deliver sustainable products that meet the needs of today without compromising with future generations.  We believe in offering high quality products and combined with energy-efficiency, the life cycle cost we will jointly offer our customers is very low. This is a perfect match.”

Soren Jensen, Head of Sulzer’s Water Business Unit, continues: “Nordic Water is a great addition to Sulzer as our strengths are complimentary. They bring extensive expertise, long experience and a wide range of essential water treatment equipment to our already strong water offering. Our combined portfolio will benefit our municipal and industrial water customers worldwide, and together we will be able to open up many new opportunities.”

Sulzer’s acquisition of Nordic Water consolidates the company’s presence in the water sector, expanding the range of products as well as strengthening the knowledge and expertise in the design and delivery of reliable and sustainable solutions for this important market.

Read more about Sulzer